Saturday, February 18, 2012

Singapore Thrown Down - David Diley Dissects

Riding into town on a boatload of shark science?
If you happened to wake up to a heretical article in the The Jakarta Post yesterday filled with all manner of eyebrow raising and or fighting words depending on which part of the article you were mentioned in, suffice to say the next few days should be interesting for you.

The quote that surprised even us was this one:


"Shark protectors claim the dish kills up to 73 million sharks each year, with some of them tossed back into the sea to die after their fins are cut off. But Jenkins took aim at the statistics and pooh-poohed this widely held belief. He said the 73 million figure, attributed to marine scientist Shelley Clarke and cited by shark advocacy groups such as WildAid and Shark Angels, had been twisted to suit their needs."

The takeaway from that quote goes back to the Oxy Shark Myth and what we said weeks ago concerning the intersection of conservation facts and policy makers.

We didn't have the time to dissect the whole article but David Diley did in his own way, so if you are just starting your coffee read on it's good stuff.

Except for the digs on presidential hopeful Mitt Romney. He may well be a vacuous out of touch multi-millionaire who prays to a racist Space Jesus (see video) - but at least he has presidential hair, you gotta give him that.

Friday, February 17, 2012

Stoopid Shark Videos and the Stone Aging of an Industry

You gotta love the meeting place of commercial shark diving and shark conservation. On one side you actually have good and honest folks trying to persuade decision makers in governments all over the world to consider shark diving as a viable alternative to regional shark fishing.

We happen to agree with this approach and believe that a series of high profile shark sites created in tandem with NGO's around the world would benefit both local populations and shark conservation.

They use the Bahamas as a prime example and an estimated 78 million a year in tourism value for shark diving. Not bad right?

Unfortunately these folks have become the unwitting street sweepers at the end of an Elephant Parade filled with stupid shark tricks and piss poor shark protocols often highlighted with images and video that run in stark contrast to those seeking a better world for sharks.

From the Bahamas to the Red Sea we have an ongoing testosterone handling problem with sharks.

Case in point, this video, and thanks to Da Shark for the find. To the shark apologists out there, and you know who you are, the sharks in this video are not dispensing, "love taps," "shark hugs," and or "shark kisses". This is good old fashioned predatory behavior, and there's no way these folks should have been in the middle of it.

If you really care about sharks and the perception of these animals it is up to the commercial folks to ensure they have a media lock on this kind of garbage shark diving which benefits no one - especially the sharks.


Oceanic white tip shark, massive warning !!! from Ritch on Vimeo.


About Shark Diver. As a global leader in commercial shark diving and conservation initiatives Shark Diver has spent the past decade engaged for sharks around the world. Our blog highlights all aspects of both of these dynamic and shifting worlds. You can reach us directly at sharkcrew@gmail.com.

Thursday, February 16, 2012

Calling All Industry Bloggers - Bring yer Red Meat!

Since 2008 this blog and quite a few others have brought three years of Industry Red Meat to the table.

The kind of blogging that informs, challenges, and sometimes even moves mountains.

Yes mountains. As in the recent trans disciplined, bi-coastal Red Meat Fest of the Oxy Shark Myth.

If you don't think that multi-blog expose fundamentally altered the way people propose shark conservation, you just haven't been paying attention.

Come to think of it, why the hell are you reading this post anyway?

Back to the providers of Red Meat.

We love you guys, and gals, and our blog roll reveals as much. For it is here you will find others who think, propose ideas, and bring to the table the discussions of the day that cause an entire industry and conservation niche to react, move, and consider.

It is also to be noted in an industry filled to the brim with those who are afraid to say what they want, paralyzed with fear at not being part of today's "in crowd", or just too bland to consider a life that has nothing in it but, "sail with the current winds," these few exceptional bloggers exhibit strong leadership for doing the complete opposite.

Life favors the brave, not those who join the pack and run with it until all their stripes fuse together to form one very large moving mass on the Golden Savannahs of Irrelevance (ya like that?).

It's good to shake things up once in a while.

So this is your chance. Get out there, make some noise, write about the things that that matter and make a difference.

Independent voices are the musical accompaniment to any industry including conservation.

You may not like the tune you are hearing all the time, but you have heard it and you had an opinion about it, and THAT dear readers is why Red Meat is so important.

About Shark Diver. As a global leader in commercial shark diving and conservation initiatives Shark Diver has spent the past decade engaged for sharks around the world. Our blog highlights all aspects of both of these dynamic and shifting worlds. You can reach us directly at sharkcrew@gmail.com.

Monday, February 13, 2012

The Monterey Whale Case - Big Names, Big Mystery?

In case you missed it there's a two part investigative article written by Virgina Hennessey with the Monterey Herald about protected whales in the Monterey Sanctuary and an underground story about a whale mother and calf, some Killer Whales (Orcinus orca) in hot pursuit, and what may or may not happened when a film crew became involved back in 2005.

The result of that encounter became part of a PBS documentary called "The Gray Whale Obstacle Course".

"In The Gray Whale Obstacle Course, Jean-Michel Cousteau and the Ocean Adventures team search for clues about this resilient, yet threatened species to gain a better understanding of the increasing challenges, both natural and man-made, that gray whales face along the way." 

What is known at this time is that whale biologist Nancy Black is being tried for feeding a Killer Whale a piece of whale blubber.  

"The Monterey resident made her first appearance in U.S. District Court in San Jose on Thursday, pleading not guilty to two counts of violating the Marine Mammal Protection Act by feeding or attempting to feed the killer whales. She was also arraigned on two counts alleging she altered a video of a 2005 encounter with a humpback whale and lied about it to an investigator for the National Oceanic and Atmospheric Administration."

What is also known is the bizarre political maneuvering and intrigue from Jean-Michel Cousteau to keep his name and his organization out of the limelight. Including apparent approaches to Rep. Sam Farr, D-Carmel:

"It is unknown whether authorities are still considering charging anyone in the organization, but Rep. Sam Farr, D-Carmel, said the younger Cousteau asked him to intervene in the investigation. The congressman said last week the investigation involved the Cousteau team's conduct during filming of the orca attack, but he had no other details" .

Monterey Sanctuary is the jewel in the crown of the entire US Sanctuary system. This court case and the levels of intrigue going back to 2005 should be interesting to watch.

If you are not following this case at this time - you should be.

Virginia Hennessey can be reached at 753-6751 or vhennessey@montereyherald.com.

Friday, February 10, 2012

“Sharks create oxygen”: A scientific perspective

The entire planet can all breathe easier now!
 Huzzah!

Thankfully the world is not "going to run out of oxygen to breathe if we run out of sharks".

So says David Shiffman, an actual shark scientist.

It took an actual shark scientist to put the final rusty nail in the coffin of the Oxy Shark Myth. A myth created out of whole cloth by a guy trying to sell a shark film a few years ago, a myth that has since taken on an almost 1950's Radioactive Monster feel and scope since it was first uttered.

This myth was the worst of shark conservation filtered through the meat grinder of Facebook hype.

It was also an issue that we swore, up and down, that we would not get involved with unless someone paid us a bunch of money to do so, and yet was so compelling that we just had to jump in with our own brand of "pseudo science snarkery".

Let's face it, it's been a lot of fun.

So now, thanks to The Shiffman and his out of the park, take no prisoners science lashing directed at  the last few hold outs of the Oxy Shark Myth, (Erik Brush we're looking at you pal), we say, victory.

It is over, the end, now we can all go back to the challenges of real shark conservation letting this amusing side show pass. What are we going to do about Latin American shark fin treaty sliding, and what to do about the Maldives and a new government who are pro business and pro shark fin?

About Shark Diver. As a global leader in commercial shark diving and conservation initiatives Shark Diver has spent the past decade engaged for sharks around the world. Our blog highlights all aspects of both of these dynamic and shifting worlds. You can reach us directly at sharkcrew@gmail.com.

Rethink the Shark - Cute Messaging!

If you want to get an entire generation of youth behind shark conservation, hit them with some first rate animation in the style of PIXAR.

That's what the folks from AfriOceans did this month and we like it:

Every time someone is bitten by a shark it gains international attention. We at AfriOceans therefore remain committed to dispelling the myths and setting the records straight. We did it with our original award winning RETHINK THE SHARK Public Service Announcements (PSA) and now we bring to you our latest RETHINK THE SHARK PSA  which we have called 'Meet Wilson', produced by a highly talented group of final year students from the Cape Town Animation School - a very BIG THANKS to this talented team and in particular to the nephew of our Founder, Lesley Rochat, namely Andrew Mc Nally!




About Shark Diver. As a global leader in commercial shark diving and conservation initiatives Shark Diver has spent the past decade engaged for sharks around the world. Our blog highlights all aspects of both of these dynamic and shifting worlds. You can reach us directly at sharkcrew@gmail.com.

Wednesday, February 8, 2012

Jessica Perry-Targaryen, Gobbly Gook from a Biologist?

Hear no oxygen, see no sharks, speak no empirical data
Congratulations to Facebook phenom Jessica Perry-Targaryen, de facto champion of the discredited Oxy Shark Myth.

You know the one. It can be found being recited by Facebook hysteria brokers who have little else to do with their time but quote half-witted conservation gobbly gook wherever they can.

Usually with a "like" button attached to some sort of petition.

"If we kill all the worlds sharks we will run out of oxygen to breathe".

According to Jessica Perry-Targaryen her entire justification for embracing the Oxy Shark Myth, much like those who fervently embrace Bigfoot or the Loch Ness monsters, comes from her made up science premise, and we quote with our own questions attached:

"One need merely apply syllogism to solve this argument:

Major premise: Phytoplankton supply Oxygen to Earth.

Minor premise: Sharks keep Phytoplankton in check.
(cite source(s) here)
Conclusion: All Sharks supply Oxygen to Earth. 
(bunk conclusion)

The model:

Major premise: All P affect O.

Minor premise: All S affect P.
(except freshwater bodies where sharks are not present?)

Conclusion: All S affect O."


We'll let actual scientists ponder the finding of Jessica Perry-Targaryen, who is fostering her own unreasonable line of reasoning with the same passion that Flat Earth People try and explain their two dimensional world to the rest of us.

In the meantime, for the rest of us, facts do matter in conservation.

Our world becomes a better place when you can bring others to understand why conservation matters without resorting to bent shark prophecies that have no basis in facts.

To Jessica and the last few hold outs of the Oxy Shark Myth, look around you.

Even the myths first speakers, the few websites that once touted the myth, and the myths old champions are all walking back from it. It's a sea change. One based in the realization that some myths are better off dying on the vine from whence they came.

Oh, and Da Shark just waded in, yikes!

Petition - Save the Black and White Sharks!



Mark Harding vs Irrational Exuberance

Latest Facebook petition, "Save the B and W Sharks!"
We keep an eye on Mark Hardings conservation musings, his on target posts, and his homespun war on Irrational Exuberance and we like what we see.

Mark is one of a few within the industry of those who make a living with the ocean willing to say what he thinks. Swimming upstream against a tide of Facebook Conservation Hysteria where actual conservation has been diluted down to a few images (regardless of their pedigree and age) and a few petitions filled with factoids, whole cloth imagineering, and no end of self serving racist undertones.

Marks conservation posts seek the calmer freestone waters of complex thought and actual hard facts (now with 20% more links), where he can quietly sow the seeds and lay a foundation of thoughtful conversation and strategy.

Case in point, Latin American fisheries loopholes. Read this post.

Shark conservation is an evolving discussion and ongoing global strategy. There are no "wins", there is no "end" and for the foreseeable future only a series of branching conservation paths to choose from if we want to actually put a dent in the global decline of sharks.

To celebrate the Maldives Shark Sanctuary as "finished and done" is to walk away from the glaring Achilles Heel of the entire Sanctuary Movement. Governments change, and the the new boss, when it comes to conservation, is not always the same as the old boss.

Fingers crossed for the Maldives this year and next.

Read Marks blog, and bookmark it. When Mark decides to speak on an issue, you know he's thinking of the next generation who will one day choose to perhaps follow his lead. To be fearless about saying what they think, always swimming upstream, and adding their own DNA to thoughtful conversation and strategy.

We can use a few more like this.

About Shark Diver. As a global leader in commercial shark diving and conservation initiatives Shark Diver has spent the past decade engaged for sharks around the world. Our blog highlights all aspects of both of these dynamic and shifting worlds. You can reach us directly at sharkcrew@gmail.com.

Tuesday, February 7, 2012

From the land of "Holy Crap Kayak Fishing"

Marlin vs kayak in Australia, where else?
Once in a while we come across videos and stories that make you wonder about those who pursue fish with the kind of, "Old Man and the Sea" fervor.

It's a bloody good book by the way, you should read it some time.

This week the tales of lone kayak fishermen Jeff Sheppeard, located 7 kilometers off the coast, take the cake.

''About five or ten seconds later, it's jumped out to the right of my kayak. It's a marlin. I held on for grim life and squealed like a girl. It's jumped out again right in front of me … it's pulling me through the water … it jumped out of the water again and done about five [consecutive] aerials. I thought, 'I hope the camera's recording.' 

Want to see the video?

Of course you want to see the video, here it is.

Monday, February 6, 2012

Very Cool Shark Diving Video!

The question of why people go shark diving has answers that, if typed out and put end to end, would undoubtedly circle the earth many times.

For Shark Diver Chris Johnson his answer and very special video surprised even us:

Sunday, February 5, 2012

Group sues state of California over shark fin ban?

Prognosticating since 2008
Welcome to the Big Time. You didn't think that the California Shark Fin Ban would just go away did you?

Nah. We didn't either.

With the sheer amount of anti-Asian nastiness that went unchecked in the lead up and execution to the “Shark Protection Act,” this new lawsuit could well be something of a game changer.

The group behind this push is the The Asian American Rights Committee of California and they have some well heeled, well organized, and well moneyed clients behind them representing:

1. Shark fin receivers

2. Wholesalers

3. Distributors

4. Asian restaurant associations

You can read more about this suit, what it means, and where it is going here at The New Law Fallout Blog. Most notably, a comment at the end of this blog post that serves to highlight what we have been saying for the past two years.

"Conservation groups have to reign in rabid anti-Asian sentiment that has become synonymous with the entire shark fin conservation movement."

While it's noble and earth wise to seek conservation change and modification to consumptive practices within various religious and distinct cultural groups. It is completely unwise, foolhardy, and starkly racist to poke an uniformed stick into the eye of your opponent, and then expect that they will not seek redress.

The current batch of anti-Asian talking points that are swirling about the Internet were created in a media vacuum without strategic leadership from any mainstream conservation group, leaving those who have a new law to deal with less inclined to let that law become, "the law of the land."

Is this really about shark fin and saving sharks? Or do we hate Asians for everything we are not?

Mary S says:
Asian Culture is a pure hogwash excuse. Money is what it’s all about. The Asian People do not have a very good reputation regarding preserving the planet or endangered animals. They are a [slash and burn people.] Consider the loss of Rhinos for their horn, tigers lost for their penises, whales killed for “scientific purposes” bears imprisoned for life for their bile, not to mention dogs and cats for all sorts of purposes. No, we all had to give up cultural things for the sake of the earth and because we overcame,via knowledge, our superstitions. Enough.

Shark Cage Divng in Tasmania? A Good Thing!

A Guadalupe Titan, 2011
Industry rumors of, "a few last hold outs" for white sharks in the Southern Hemisphere have been the stuff of legends and myth for a number of years now.

That changed in 2008 with a nascent operation at Stewart Island, NZ.

Unfortunately conceived of and run by a commercial shark fisherman who has a multi-ton quota of shark fin for export to Asia (yes it's true). Thankfully for the industry newer and greener operations have surfaced at Stewart Island making this site one of the most exciting finds in the past decade.

You owe it to yourself to make the very long trek one of these days to Stewart Island and say hi to Mike Haines in season. The white shark encounters are some of the best on the planet at this remote and special site and Mike is an island local who cares about these sharks.

But what about Tasmania? Where the heck is Tasmania?

Tasmania represents the final frontier for white shark diving. A place so remote, so unspoiled, that white shark populations regularly kick out monster sized animals in the 18-19 foot class.

That's the good news. The better news this week is two enterprising Tasmanian locals, Scott Howlett and Dave Young, have decided to make a go of the operations side after seeing how it is done with Australian commercial shark diving legends Rodney and Andrew Fox.

We wish them the very best, if you want to get an idea about Tasmania white sharks go do a Google search for Tasmania White Sharks, or you can just sit back and watch this video here:

 

About Shark Diver. As a global leader in commercial shark diving and conservation initiatives Shark Diver has spent the past decade engaged for sharks around the world. Our blog highlights all aspects of both of these dynamic and shifting worlds. You can reach us directly at sharkcrew@gmail.com.

Saturday, February 4, 2012

S.B. Filmmaker Mike DeGruy Killed in Helicopter Crash

Mike with his million watt smile
When an industry original goes by the wayside it's time for us all to gather round and remember.

This week we remember filmmaker Mike DeGruy's passing with much sadness.

 Mike deGruy was a graduate student in marine biology when he first picked up a 16mm film camera. Thirty-plus years on, his company, the Film Crew Inc., travels the oceans making underwater films for the BBC, PBS, National Geographic and Discovery Channel. He dived beneath both poles and visited the hydrothermal vents in both the Atlantic and the Pacific. And as you can imagine, he collected many stories along the way.

An accomplished diver and underwater cinematographer, deGruy also became a go-to host and expedition member on shows like the recent Mysteries of the Shark Coast with Céline Cousteau and Richard Fitzpatrick. (He was a regular on Shark Week -- and a shark attack survivor himelf.) But his first passion was cephalopods, and in fact deGruy and his team were the first to film two rarely seen cephalopods, the nautilus and the vampire squid, in their home ocean.

The Sad News

Mike DeGruy, the internationally respected and unanimously liked documentarian of underwater nature films who called Santa Barbara home, died today in a helicopter crash in Australia just before 4 p.m. local time. He had just turned 60 years old at the end of December, and leaves behind his wife and two children.

Thursday, February 2, 2012

Dates Announced for Whale Shark Festival in Isla Mujeres, Mexico

ISLA MUJERES, MEXICO, Feb 02, 2012 (MARKETWIRE via COMTEX) -- Celebrating the beauty and culture of Isla Mujeres, Mexico, and championing the need to preserve a fragile marine ecosystem, ecotourism travel agency Ceviche Tours and the Isla Mujeres Department of Tourism announce the Fifth Annual Whale Shark Festival, a community extravaganza that showcases the achievements, traditions and environmental splendor of Isla Mujeres. 

The Festival will be held June 15-17, 2012 in Isla Mujeres, Quintana Roo, Mexico. 

Last year thousands flocked to the family-friendly Whale Shark Festival, which offers guests an opportunity to participate in ecotourism adventures such as swimming with whale sharks, the largest fish in the ocean and an endangered species; swimming with sailfish; join in traditional dancing performed by local troupes; exploring ancient Mayan ruins and much more. 

Proceeds from the Whale Shark Festival will be donated to Amigos de Isla Contoy, a 501c3 non-profit organization that is involved in the education of the local population on sustainable marine conservation and ecotourism. 

Sustainable Ecotourism The Whale Shark Festival is an effort to raise awareness for the need to preserve the area's marine ecosystem. Isla Mujeres is part of the second largest barrier reef on the planet, and serves as the nursery of the Caribbean and the migratory path of whale sharks, sea turtles, water fowl and game fishes.

"Sustainable ecotourism engages guests in the effort to preserve the culture of Isla Mujeres, their way of life and the marine environment," said John Vater, who co-founded Ceviche Tours with his wife, Adriana, and longtime friend and Isla Mujeres native Luis "Cuco" Refugio and his family.
Swim with 200+ Whale Sharks Kicking off the Festival will be the whale shark bloom, when hundreds of these gentle giants come together to swim in a group near the coast of Isla Mujeres. As many as 1,400 whale sharks may make their way through the waters north of Isla Mujeres every summer according to Dr. Robert Hueter, Director of the Center for Shark Research, Mote Marine Laboratory and scheduled speaker at the 2012 Whale Shark Festival. 

The Isla Mujeres Tourism Department Director, Eyder Jahil Hoth Perez, stated, "Through this event tourism awareness about the whale shark has increased over the last several years, especially regarding the need to protect all our species and natural resources. Ecotourism-related activities have also been creating a new culture of respect and care for our natural resources in the new generations of islanders. In this, children have been playing a very important role toward changing behaviors that were unsustainable in the long term." 

Exciting Activities for the Whole Family Guests of the Festival can participate in a wide array of activities: 

Swimming with Whale Sharks -- Guests can swim with whale sharks and join a conservation effort spearheaded by ECOCEAN, a non-profit organization that maintains the global Whale Shark Photo-Identification Library, a visual database of the unique markings, or spots, that can identify individual whale sharks and track them. Guests can add their underwater photos of the whale sharks to ECOCEAN's global database. 

Fun for Families -- The Festival will feature many educational children's activities about environmental conservation. 

Academic Seminars and Film Showcase Scientists from around the world will attend to present a series of Academic Seminars on marine biology, sustainable ecotourism and Mayan architecture. Renowned marine biologist Rafael de la Parra, who discussed his groundbreaking research, "An Unprecedented Aggregation of Whale Sharks, Rhincodon typus, in Mexican Coastal Waters of the Caribbean Sea" at last year's Whale Shark Festival, will again be speaking and also organizing the 2012 panel of distinguished speakers. 

Wednesday, February 1, 2012

The Oxygen Shark Myth - Debunking the Bunkable

What would Steve Zissou say?
Ah, yes, and now it is an open discussion, any takers?

We're talking about the Sea Shepherd School of WTF Media inspired shark conservation quackery about sharks and oxygen.

You know the one we are talking about because it goes something like this:

"If we lose all the worlds sharks we will run out of oxygen to breathe".

The single most stunning moronic conservation quote of the century. Based not in fact, created to help sell a film, and gobbled up like Conservation PEZ by those who trade exclusively in "shark conservation chatter".

But don't take our word for it.

Good old Da Shark in Fiji has taken this issue on like few others can with a nice mixture of ranting, analogy, historical context, links to others, and yes some freaking science people!

For Want of Some Freaking Science

So here we are with a veritable tide of discontent directed at the purveyors of the oxy shark myth, and so far nothing. No push back, no irate "how dare you," nothing at all. We would have thought if this juicy factoid about sharks was in fact true that our constant poking at shark conservations "most hallowed media byte" would have elicited at least a good old fashioned "F%@!% you".

Frankly we're disappointed.

The oxy shark myth is one more nail in the coffin for an entire grass roots movement begging for credibility and clinging to a never ending series of high energy Facebook postings, twice baked petitions, and Hockey Mom Hysteria based on the cracked and crumbling foundation of, "if we lose all the worlds sharks we will run out of oxygen to breathe".

We even saw this  garbage on a recent petition to get NY to go shark fin free. Naturally we didn't sign said petition, like we wouldn't sign a petition from shark finners who claimed that sharks are now growing their fins back. 

In any language or culture, a lie is a lie, made up conservation facts expose the shallowness of the people behind them. Is this a conservation movement or a spiraling media cesspool?


The question begs about the oxy shark myth, so, can we get some freaking shark science here people?

And for those who read in complete sentences, more great stuff  here and even more here.

Tuesday, January 31, 2012

Welcoming the New Guys - Nantucket Shark Divers!

It's been a long time coming but through it all Captain Bryce Rohrer has maintained a steady head of steam and enthusiasm you only find from truly dedicated shark diving folks.

The end result is Nantucket Shark Divers the place to be for shark diving in the USA off the East coast in the summer and fall:

Nantucket Island is home to many species of sharks during the warmer months of the year. From June through October species such as blues, makos, threshers, great whites and basking sharks call the waters off the island home. Nantucket Shark Divers has perfected the game of finding and interacting with these animals both above and below the water. With years of experience and a flawless safety record we are able provide novice and experienced divers alike a world class day of adventure on the water. Whether you are a professional looking for photographs or a beginner looking to get in the cage we have over 10 years of experience to make sure you get as much out of the day as possible. Our aim is to provide our clients with a first rate safe and successful wildlife experience. We also offer shark and whale watch viewing trips from the safety of the boat. For an experience you won't forget book a trip with us in search of sharks and witness nature at it’s peak. Sharks and whales are guaranteed on every trip.

We wish these guys the very best and good luck with the white shark hunt that kicks off in a few months from now, make the industry proud guys!

Diane MacEachern Firing on all Cylinders?

Beware the Nurse shark encounter experts
As much as we dislike the current trend within the the shark conservation community to fabricate facts, inflate research numbers, and simplify complex issues down to the level of single celled organisms, we're no fans of those who take on the commercial shark diving industry either.

Enter Diane MacEachern, a blogger who dropped a stinker of an article onto the Internet this week with all the grace and finesse of a Hakapik wielding sealer on a Canadian ice flow.

The article is called Shark Cage Diving: Helping or Hurting? and it's filled to the brim with assumptions, non facts, and a quote from a guy who's selling a book:

“In general, people are intruding upon and disturbing wild animals far too much. We need to leave them alone and in peace far more than we do. Shark cage diving is a good example of how we are messing around with great white sharks too much, habituating them to people, having them associate chum (bait) with people, and drawing them to locations where surfers and divers are recreating.

Yes, yes, we have heard this all before, but has anyone heard of the great pro-industry research data into white shark habituation from Australia?  How about Isla Guadalupe?

The fact is articles like these, written by self avowed sharks divers (Diane's total shark experience was a fetid pool with a lone Nurse shark in it) do a lot of harm to an industry that we recently blogged about. One that suffers, three decades on, from an almost complete lack of regional and government/tourism support.

Globally our industry generates tens of millions of dollars and educates tens of thousands of divers, and remains one of the safest adventure sport industries out there. That's a fact. The rest of it, the assumptions that regionally our industry is responsible for shark attacks on surfers, divers, and little kids on inflatable dinosaurs is just, "pull it out of your ass media meat grinder material". There's nothing to back any of it up, not a single paper, no data, just good old fashioned hysteria.

Unfortunately it plays, and plays well, especially when Nurse shark diving experts, afraid of attacks, decide to get busy with blogs.

What our industry does not do well is handle mainstream media output. In terms of an international body we handle the few ridiculous industry videos, idiotic images, and industry/conservation messaging with the same care and preparation that a five year old exhibits with a set of overlarge paint brushes, three color paint, and small black and white images asking one to, "paint in the lines".

We need to do better.

In terms of a global industry, after 30 years, it is high time to create an industry body. One that works with regional government and tourism members for support, action, and one that handles the global media output. A few images and video, some shot years ago, are still being used today to malign an entire industry worldwide. These images appear for simplistic reasons, and no one is ever held accountable. But they do damage none the less.

It's an interesting thought, a global commercial shark diving body, and a bold vision, we wonder if anyone is up for a challenge?

Monday, January 30, 2012

Sustainable Shark Fishing? Starts With a Study

Sustainable shark fishing? You need data first
A MURDOCH University PhD student will spend a year living among Indonesian shark fishermen to investigate their impact on shark populations and the effects of conservation efforts on fishing communities.

Vanessa Jaiteh hopes her project, beginning at the end of this week through Murdoch’s Asia Research Centre and Centre for Fish, Fisheries and Aquatic Ecosystems, will contribute to future sustainability of declining fish stocks in Indonesia that support thousands of villagers living in poverty.

“I’m trying to identify trade-offs between shark management initiatives and their impact on the livelihood, security, and economic welfare of remote shark fishing communities,” she says.
Ms Jaiteh’s 14-month field research involves her living in three or four remote fishing villages in the Maluku Spice Islands and West Papua for several months at a time, going on fishing expeditions and doing fish market surveys.

Once she has a feel for how they live she will conduct structured interviews and focus group discussions.

Ms Jaiteh will also assess shark numbers and sizes from fixed camera footage and onboard observations of captured sharks to gain some of the first significant data on Indonesian shark populations and uncover the effectiveness of conservation areas and how much fishing pressure it can sustain.

While Indonesia is the world’s largest harvester of shark fin, the industry remains largely unregulated with no legal framework beyond a 2006 national action plan of only a few pages that are not based on scientific findings.

However, Ms Jaiteh says marine management efforts “are often based on biological data alone, and therefore do not take into account the livelihood requirements of local fishers as stakeholders”.
“If fishers are not considered in management decisions, the result could be illegal fishing or greater poverty among fishing communities,” she says.

She says livelihoods are already under pressure due to Coral Triangle marine protection areas in traditional fishing zones forcing fishermen travel farther on increasingly expensive fuel.

Ms Jaiteh says a potential way to improve the situation would be to get villagers out of shark fishing and into aquaculture, especially as Indonesia wants to double its fishing productivity by 2014.

Ms Jaiteh’s research is made possible by the Prime Minister’s Australia Asia Outgoing Postgraduate Award, which provides financial support for Australian postgraduate students to do research in Asia that works towards strengthening the relationships between Australia and Asian countries.

Complete story here.

Sunday, January 29, 2012

Shark Diving Industry Thank You to Tourism Minister Gail Gago!

Tourism Minister Gail Gago's new shark plane, this is how you do it folks!
Mention commercial shark diving and we'll show you years of media turmoil surrounding any particular site on the planet.

Except for Fiji.

Most of the media discontent is based on one simple fact.

Regional politicians and tourism officials are usually too timid to stand behind our industry.

In some places politicians even callously use our industry as a wedge issue, calling in and stoking what amounts to media air strikes on operations that have exhibited nothing but 100% operational excellence. Believe it, it happens.

But thankfully we have Australia this week to show the way. 

Tourism Minister Gail Gago has unveiled a new, rare, and forward thinking partnership with regional shark diving operators and airlines to bring more tourists to where the sharks are in the form of a white shark cage diving airplane:

"Ninety nine percent of tourism is marketing, is selling a message. We know that people fatigue to messages very quickly, so the trick is to try to keep creating novel and clever, and new and innovative ways to get your message across", says Minister Gago.

We could not have said it better, and Kudos to Minister Gail Gago from an entire global industry this week.

Thursday, January 26, 2012

Russell Easton...of all the sleazy shark divers

Russell Easton's stolen shark attack image?
The dive industry is a funny place.

For the most part folks are content to experience the wonders of the undersea realm, rinse, and repeat.

Then there are folks like Russell Easton who are a newer kind of diver, ones who are seeking to "make a name" for themselves.

You almost can't blame small minded shark divers like Russell. For the past decade a few within the shark world have schooled guys like him with a never ending parade of stupid stunts with sharks.

We have all seen the images and sadly the videos too.

These shark stunts get picked up by the mainstream press, usually to the somewhat hollow industry member howls of, "we didn't know the press was that bad!" and then broadcast all over the world.

Guys like Russell here are just waiting for their chance to be a media big shot.

And they get it from this gal, Alison Smith-Squire, who is a writer, journalist and media agent selling exclusive real life stories to newspapers, magazines and TV. She owns the Sell My Story website Featureworld.co.uk, which was set up to help ordinary people, like our friend Russell, sell their stories to the press for as much as $9000 USD.

Not bad stuff if you can get it.

Problem with this months mega viral "shark attack story" featuring Mr.Easton is the fact that he allegedly ripped the images of him getting mauled by a Tiger in the Bahamas from another diver who was there on the same dive. The one who took these images of Russell in the first place.

It's a bit of an industry blow out right now.

You have Tiger shark image sets that malign a perfectly good and safe shark diving site, the shark attack subject which makes everyone involved look like rank amateurs, and the fact images were allegedly stolen, sold to the highest bidder, and then regurgitated onto the main media stage like the stomach contents of an overheated Andean Condor (Vultur gryphus).

By the way Condors are vultures that feed exclusively on rotted matter so we thought the analogy was spot on.

Is there a solution to this?

Probably, if we can get past the howls of "we didn't know the press was that bad!".

We might suggest that Russell appear on some sort of Banned Forever Shark Diving List, his dreams of going to Cat Island should be crushed, and if he ever finds himself at at DEMA with a name tag that says "HI, I'M RUSSELL EASTON," taken out the back and dumped into the nearest trashbin.

Hopefully one that is packed full with the stomach contents of several overheated Andean Condors (Vultur gryphus).

You get the picture, and sadly for the rest of us, we get to clean up what Russell's picture left behind.

UPDATE: We also called and emailed Alison Smith-Squire to ask her how this story came about, including the shocking images and storyline, here was her immediate response:


"Russell Easton signed a form saying he had the rights to sell the photos and you must take this up with him.The copy was read back to him and I spoke with Russell just 30 mins ago and he is absolutely happy with his quotes, I am sorry but I can't help or go into it any further."

Alison
01727 841811
07979 750616
Alison Smith-Squire

Featureworld Ltd
Registered in England no: 5826131

Frazier Nivens - Helping Out a Good Friend!

Frazier Nivens in the center, celebrating the completion of another commercial production in the Bahamas, 2011.

For those who know him they know he's one of the last, truly, great guys in our industry. He's also extremely talented underwater and we have thoroughly enjoyed the time we have spent working with him in the Bahamas.

Unfortunately Frazier suffered a setback this month in the form of a detached retina and whopping medical bill.

The eye will heal and for an underwater cameraman shooting RED this is great news indeed.

The whopping bill is another issue all together.

If you want to help there's a fund that's been set up to help Frazier out. We're in, and with the help of friends, he'll fully recover this setback as well.



Online Benefit Donation Page 


Or checks can be mailed to:


First State Bank
101433 Overseas Hwy.
Key Largo, FL 33037


Make checks payable to: Frazier Nivens Benefit Account

Wednesday, January 25, 2012

Sharks and the Global Supply of Oxygen?

Dwindling sharks = no oxygen, the quote that will not go away
It started as a throwaway conservation quote a few years ago.

Completely devoid of any facts, empirical data, or even common sense, it has since snowballed into shark conservations most enduring media quote.

Much to the chagrin of serious shark conservation folks who would rather it go away - forever.

We're talking about the great non debate of Sharks and Oxygen, you know the one:

"If we lose the worlds sharks, we will run out of oxygen!"

The phrase was first uttered in it's most simplistic form back in 2008 during the promotion of the film Sharkwater (go to timeline 3.13). It has since taken on a life of it's own among those who trade in rumor, hysteria, and Facebook tribal gatherings where facts, common sense, and the twisted logic of gasbagging conservation statements are rarely considered.

But consider them we must, because the playing field for shark conservation has changed dramatically since the early days of 2008 and now we have an actual movement on hand, one that is being eyed at by big fishing interests and politicians.

It's a conservation nexus where words matter and facts even more so.

I would like to propose that we do away with or retire this poor excuse for a media quote:

"If we lose the worlds sharks, we will run out of oxygen!" 

Perhaps to be replaced with something a bit more tidy?

Sadly, the gulf between those who are relevant in the shark conservation movement, those who get things done vs the loony fringe who cling to outdated media quotes seemingly designed and crafted by the Paul Watson School of Media WTF!? is growing on a daily basis.

Adopting a straight and universal media narrative for sharks is not only important, it is imperative, if the movement is to stay relevant and frisky into 2013 and beyond.

Brother, you got a good shark quote?

Last Stand for Sharks January 30th , 2012

Film: Last Stand for Sharks

WHEN
Monday, January 30, 2012
6:30 p.m. - 7:30 p.m.

WHERE
Embarcadero Center Cinema, One Embarcadero Center, Promenade Level, San Francisco, CA 94111
Landmark Theatres
San Francisco, California


About Sanctuary: The Last Stand for Sharks
This film portrays the underwater world of sharks and paints a global picture of the threats they are facing worldwide. Globally shark populations are declining, but there is growing momentum to protect sharks. Many locations are recognizing that sharks are worth more alive than dead, contributing both to the economy and the stability of crucial marine ecosystems like coral reefs. Some countries have even established shark sanctuaries throughout the entirety of their waters.

A shark sanctuary is a place where sharks can live and reproduce without the threat of fishing. Since many shark species are migratory, the establishment of small protected areas or breeding closures is not enough to protect sharks that may leave the boundary of safety. Shark sanctuaries present an opportunity to protect sharks over a larger scale before it is too late.

About the Pew Environment Group
The Pew Environment Group is the conservation arm of The Pew Charitable Trusts, a nongovernmental organization that works globally to establish pragmatic, science-based policies that protect our oceans, preserve our wildlands, and promote clean energy. For information, visit http://www.pewenvironment.org/.

About the Coral Reef Alliance
The Coral Reef Alliance (CORAL) unites communities to save coral reefs. CORAL provides education, tools, and inspiration to help local communities become passionate environmental stewards of the reefs. Together, we develop well-managed marine protected areas and sustainable businesses to benefit coral reefs and people. For more information, visit http://www.coral.org/.

Registration is required for this event. Use the link below to register. Please RSVP by Friday, January 27, 2012.


The Pew Charitable Trusts makes every effort to comply with federal, state and local government ethics rules when hosting events. Please make sure that your participation is consistent with applicable ethics rules.

Shark warning website planned - Cool

Co-Direct of Sustainable Tourism Research and Development at Curtin University, Professor Carlsen is working on an interactive site which would post warning and then sent out that information by email.
Currently, around 100 people have signed up to both send and receive information about shark movements.

"I feel that if I had had some knowledge about the presence of the shark I would have exercised more caution before going into the water."

Do people have information, wonders Professor Carlsen, "particularly whether they're are able to tap into local knowledge and any local sightings".

At the moment, the site is in development, he says. The next stage is to prove the concept.
"We're looking for surfers to sign up to sharkwatch.info. I'm pleased to say we've just hit 100."
The site needs to be interactive and to get the message out in the most effective way explains Professor Carlsen. "At this stage, we're looking at email alerts.

"Further down the track, we could be doing all sorts of things like SMS alerts and dedicated web pages and links to popular sites that surfers use such as Coastal Watch and Sea Breeze and so on"
When the site is operation, people will be able to report a shark sighting and to have that sighting confirmed by others. Professor Carlsen is also hoping to provide maps to specify locations.

"Anyone that signed up and has nominated that beach as one of their local beaches will get an email alert about the sighting.

Complete story here.

Tuesday, January 24, 2012

Shark Diver in Afghanistan? Oh, Yeah!

Right next to the bomb shelter, nice!
A good buddy at the Bagram airfield in Afghanistan, home to the 455th Air Expeditionary Wing and several thousand of our hard working military decided to plant the Shark Diver flag week.

As you can see, once again, Shark Diver wins the award for appearing at the least likely and most remote places on the planet.


We now have Shark Diver awareness on two research submarines, on road signs all over Iraq, Bagram airfield, Cuba, and even on the back of a Taiwanese shark fishing boat somewhere in the South Pacific.

Just wanted to let those shark fishing bastards know we're watching them.

Thanks again to the Major, hope you liked the t-shirts we sent to you and your crew. Stay safe.

For Want Of A Shark - Brilliant Blogging!

Every once in a while along comes some great shark blogging and this week it is our high honor to introduce you to some thought provoking stuff from Deep Sea News and rickmac.

For Want Of A Shark

Causal relationships can be fiendishly tricky. Spend an hour watching any of Star Trek Voyager’s time travel episodes and you begin to understand why the show’s writers often resort to lines such as, “It’s better if we don’t talk about this too much.” Consider another example of causality. I’m hammering-out this post at home with a real doozy of a head cold. My sinuses are completely congested. I can feel a chest full of gunk as I breathe. And my body generally feels achy and sore. Retracing my steps, I might place contraction from surface contact or airborne transmission at work where one of my officemates was complaining last week of “a cold.” Or it may have been aboard the overheated, moist Petri dish of my commuter ferry. Or maybe it was from the plates, silverware, water, or food from any of the restaurants I visited last week.

Not having the Center for Disease Control’s Epidemic Intelligence Service activated at every case of the common cold, I will likely never know the ultimate cause of my dreary, mucus-filled weekend. But I can connect enough dots, enough small actions, to construct a few compelling transmission scenarios that might hold water. The more dots I connect, however, the more provisional and potentially implausible my scenarios might become. Causally, they may seem tenable. But at some point, the casual relationships become so tenuously hair-thin that it simply strains credibility.

Red complete post here.

Monday, January 23, 2012

Bahamas Tiger Shark Tagging Video

Gotta say we like this video and the current work being done with Tigers in the Bahamas by this entire team. Dr. Mahmood Shivji with NOVA Southeastern University and Dr. Brad Wetherbee with the University of Rhode Island are tracking the animals as part of their research for the Guy Harvey Research Institute.

Sunday, January 22, 2012

Shark Finning Bans by Da Shark

Facts, deeper thought, reality, nooooo!
There's a few folks out there who have had some dim words as of late for Da Shark and his firebrand way of "telling it like it is". Covering a wide range of topics from commercial shark diving to conservation initiatives the reason we like Da Shark and his blog is the simple fact he brings thought to the process.

In a world now dominated with hysterical Facebook conservation postings that offer little in the way of hard facts and drill down analysis, his blog brings the deeper understanding and real world practicality to the issues of the day.

Case in point, this weeks post on shark conservation and shark fin bans. This is about as good as it gets and a great read that will undoubtedly get lost on many who would rather add their obligatory "like" to a picture of a dead shark or "click" a petition that is hard on emotional kick but short on hard facts.

We need more of Da Shark and we are getting it in the form of blogs like Office to Ocean but sadly these are now just "pets tourbillonnant dans les grands vents de la bêtise" in the wider non-discourse out there.

Like it or not, thought matters, as do blogs that spend the time on the issues. You may not like the delivery but for the record, we'll continue to "like" Da Shark and his blog.

Thursday, January 19, 2012

Carl Safina, Dropping the Hammer

What's all the fuss about this fish?
Read Carl Safina's regular blogs on Huffington Post because if you are not a fan yet you soon will be.

For readers of this blog and others on our blogroll you'll note a tendency for irreverent blog posts skewering many of the Titans of Media and the gasbagging program decisions that make up our wildlife programming media landscape these days.

Carl is on board and this week we found him harpooning, with the finesse and grace of Japanese Research Whalers, recent programming choices by National Geographic Wild.

In Carl's cross hairs this week a decision to highlight the take of endangered Bluefin Tuna in a new show called Wicked Tuna. Naturally this show has raised the ire of many in the conservation world, and not the simpleton Green Gotcha ire we recently witnessed with the pseudo anti-lesbian Rosie O'Donnell shark hysteria either.

This is good old fashioned main stream ire that only comes from poor programming choices by Nat Geo and a brand that has devolved in the form of Nat Geo Wild the ugly step child of the wildlife media stage.

Frankly it is refreshing to see this kind of smart, targeted, media push back and kudos to Carl for this post and others. Let's hope 2012 sees more of this from Mr.Safina because every street protest needs a leader out front defining the issues and Carl has a nice way with words.

Why shoot productions with sharks at Tiger Beach, Bahamas?

Mythbusters 2009 Discovery Networks
Film and television productions have come to realize that Tiger Beach, Bahamas is perhaps one of the best sites to film shark productions on the planet, and for good reason.

Shark Diver has been involved with top rated productions for the past seven years at this unique dive site and we have listed just a few reasons to consider your next shark productions here.

1. Ease of Production

Tiger Beach sits just off the shores of Grand Bahama Island. With top rated hotels for talent and crews like the Old Bahama Bay Resort and Marina as your base of operations and medium sized dive vessels for productions, from concept to shoot day this site has everything you will need. Additionally the Bahamas Film Commission is perhaps one of the most production friendly government agencies in the Bahamas and has gone to great lengths for every production they service to make things happen.

2. Multi-Species Encounters

Few dive sites on the planet can offer guaranteed big animal encounters with Tigers, and even fewer offer multi-species encounters all within a short distance of each other. From Reef sharks to Tigers and even clouds of Lemon sharks, Tiger Beach and the surrounding reefs offer shark filled productions in short order.

3. Dive Site Magic

At a maximum depth of 20 feet Tiger Beach offers an encounter space tailored for novice to serious talent. Visibility at Tiger Beach is 80% blue water, additionally the vast majority of Tiger Beach is white sand bottom allowing for additional objects and production development for larger commercials and product placement. Consider Tiger Beach a blank canvass for commercial productions that seek live sharks in the environmentally friendly environment they develop.

4. Cost Benefit

Most shark productions originate out of the USA. From commercials to documentaries flights, accommodations, and time are of the essence once you decide to do a shark production. With ease of travel to Freeport, Grand Bahama from multiple major airports in Florida the Bahamas makes the most production sense. We like to call this site a one-stop-shop for unique productions.

In 2010 Shark Diver was the driving force behind an award winning Gillette commercial at Tiger Beach, developing the site, building cage systems, talent choices and dive safety crews. In tandem with a top Los Angeles based commercial agency the following Gillette commercial set the bar for live action shark filmmaking and won a prestigious award at the Cannes Film Festival.

Where are you going to shoot your next shark production?





White Sharks vs Snappers - Great Video!

We have always said the easiest way to find a white shark is to follow the fishermen. It was how Isla Guadalupe was "discovered" many years ago and if you happen to be in Arno Bay, Australia this time of year, finding a white shark is as easy as snapper going fishing.

"A 4 metre great white shark circles the boat waiting for an easy feed as we have a double hook up of big snapper at Arno Bay"


Fisherman's gold: Shark fin hunt empties west African seas

SAINT LOUIS, Senegal: Retired fisherman Sada Fall is upbeat. His two sons are returning from sea with a boatload of “gold”, as he calls shark fins, whose value has near-obliterated the ocean’s top predator in these seas.

Fall, 62, walks along the beach in this fishing village in the north of Senegal, his blue-grey boubou flapping in the dry, dusty wind, a bright red flowered umbrella shielding him from the scorching sun.
“This is the great shark cemetery,” he says waving his hand dramatically across the beach where dried hunks of shark meat are piled up, filling the air with a musty, acrid odor as suffocating as the heat.

Colorful painted pirogues line the beach where children play and sheep wander around. A giant pelican is curiously tethered to one of the crumbling houses. Saint Louis is one of the biggest shark landing sites in Senegal and one of scores along the west African coast where the predator is quickly disappearing.

Fall’s sons have been gone for two weeks deep into Mauritanian waters for a voyage which, including food, water, fuel and salt to pack the fish, can cost more than 500,000 CFA (750 euros/$1,000).

Spurring these fishermen on is the insatiable Asian appetite for shark fins, which make their way onto ostentatious dinner tables in Hong Kong, Taiwan and Japan. “The fins don’t stay here, they are worth a lot of money,” says Fall. He explains that when a boat lands, amidst the chaos of bartering and buying shark meat to be dried, smoked and sold in the region, the fins are swept away by intermediaries to Dakar, and treated very carefully.

“The fins are gold, sometimes we keep them in our own living room – with the air conditioning on,” he laughs. Often the intermediaries will meet with Asian businessmen in a Dakar hotel to hand over the booty. “You bring the bags, go into the hotel, hand over the bag, they hand over the money.” Mika Diop, a biologist and coordinator of the Sharks sub-regional Action Plan (SRPOA-Sharks) says that depending on the size and species of the fin involved, they sell for up to 100,000 CFA (150 euros) per kilogram (2.2 pounds).
But it is the men further up the chain who benefit the most, as many fishermen don’t realise exactly how valuable their product is. Some restaurants charge more than $100 for a bowl of sharp fin soup. “We catch them, but I couldn’t afford a small bowl of soup,” says Fall. ‘Mercenary mindset’- many fins are also exported fraudulently through normal channels classified as dried fish, says Diop.
In West Africa, shark fishing began in the 1970’s, booming in the nineties due to rising demand from Asia for shark fins, according to a report entitled “30 Years of Shark Fishing in West Africa” co-authored by Diop in 2011. Since 2003, shark catches have plummeted. This is not good news but a sign that there are less to catch. These days fishermen can spend up to 20 days at sea, heading as far west as Cape Verde or south to Sierra Leone in search of their gold, with what Diop bemoans as an often “mercenary mindset”. Diop explains that sharks are particularly vulnerable because it can take more than 10 years for them to reach sexual maturity and their fertility rate is very low, making recovery from overfishing all year round near impossible.

“On average the weight of the fin represents only two percent of the total weight of the animal, so you can see the massacre needed to keep up with the demand for shark fins,” he tells AFP.
In Saint Louis, Fall finally gets a phone call from his pirogue. Days of bad weather have hampered fishing and even the good days have yielded no sharks. The boat is now expected the following day. A fisherman for more than 30 years, he has seen first hand the worrying drop in shark numbers. “We are obliged to catch small sharks. We know its not good but if one person doesn’t, the next will… “It brings in a lot of money, so we don’t see the importance of the shark.

We earn and we will keep on earning until the sharks disappear,” he says sadly. The shark fishing report talks of days when hammerhead sharks up to six metres long (20 feet) and one-tonne sawfish were caught in these waters. The sawfish-printed on the back of Senegalese bank notes-hasn’t been seen since the early 1990s in coastal waters from Mauritania to Sierra Leone, except for Guinea-Bissau.

According to the report, the value of sharks landed annually in 2008 in Senegal, Gambia, Guinea-Bissau, Mauritania, Sierra Leone and Cape Verde is estimated at 8.5 million euros ($11 million).
Diop’s shark project has published an identification guide for fishermen and has helped west African nations put legislation in place, most importantly to ban “finning”. In Senegal this legislation is still in the pipeline. Finning is the practice of cutting of the shark fin while at sea, and tossing the rest of the shark back into the ocean to face a cruel death by suffocation or blood loss. Despite the laws, it still continues.

If shark-hunting, in Senegal and the world over, is not brought under control, Diop and other experts predict dire results for a marine ecosystem regulated by the predator for some 400 million years. A report by the Pew Environment Group in June 2011 estimates some 73 million sharks are caught annually and 30 percent of species are threatened with extinction.

The fisherman Sada Fall becomes anxious and harder to get hold of. The “big shark guy around here”-his distributor-has left back to Dakar after hearing the fishing trip has not gone well. Three days after the boat was supposed to land it reaches shore just after midnight. With no sharks caught, it quickly refuels and heads out again for several more gruelling, and expensive, days in search of fisherman’s gold.

From PRI.

Mercury bioaccumulation in elasmobranchs? Study

Conservation sources have been waging a war on shark products for the past five years saying that shark fins and meat for human consumption are loaded with mercury. Here's another first rate study that backs those assertions up.

 

 Nicholas Kutil and David L. Taylor.

ABSTRACT:

Mercury (Hg) is a toxic environmental contaminant that bioaccumulates in fish tissues,
including numerous marine species. Cartilaginous fish of the subclass Elasmobranchii are important ecological constituents of marine ecosystems, yet the fate of Hg contaminants in their body tissues is largely unknown.

In this study, four species of elasmobranchs: little skate (Raja erinacea), winter skate (R. ocellata), smooth dogfish (Mustelus canis), and spiny dogfish (Squalus acanthias), were collected from the Rhode Island/Block Island Sound, and the Hg content (ppm wet wt) of white muscle tissue was analyzed using automated combustion atomic absorption spectrometry. Diet and feeding habits for each species were also assessed by stomach content and stable nitrogen (δ15N) and carbon (δ13C)
isotope analyses. Mean Hg concentrations differed significantly among species, with highest
levels measured in smooth dogfish (mean Hg = 0.680 ± 0.107 ppm, n = 15), followed by
spiny dogfish (mean Hg = 0.312 ± 0.034 ppm, n = 44) and skates (mean Hg = 0.110 ± 0.008
ppm, n = 78 and 0.069 ± 0.005 ppm, n = 56 for little and winter skate, respectively). The Hg
concentration of skate muscle tissue did not vary by body weight, suggesting that Hg does
not bioaccumulate in these species.

Conversely, smooth and spiny dogfish bothbioaccumulate Hg with respect to body size, although smooth dogfish have a higher Hgcontent relative to spiny dogfish. The elevated Hg concentration of smooth dogfish may beexplained by their higher trophic level status, as determined from δ15N signatures (meanδ15N = 13.29 ± 0.88, 11.82 ± 0.60, 12.33 ± 0.65, and 12.12 ± 1.06 for smooth dogfish, spiny dogfish, little skate, and winter skate, respectively). The enriched δ13C values of skates and smooth dogfish indicated benthic foraging (range of mean δ13C = -16.39 ± 0.32 to -17.42 ±0.46), which was further confirmed by the dominance of decapods and crustaceans in the
stomach contents. Conversely, squid and butterfish were the principal prey of spiny
dogfish, and the contribution of these pelagic prey was reflected in the depleted δ13C
signature (mean δ13C = -21.97 ± 0.83). Future work includes researching the effect habitat
use and prey Hg to better understand bioaccumulation patterns in these species.


Presentation at the 2012 Winter Meeting of the Southern New England Chapter (SNEC).

January 26, 2012

University of Rhode Island
SOURCE and PDF-DOWNLOAD