Opportunistic visitors

I’m happy to share this with you: Opportunistic visitors: long-term behavioural response of bull sharks to food provisioning in Fiji.

See also Mike’s blog for more on this.

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Fish in the global balance

Here’s a must read Editorial from the New York Times. And for those interested in the details read this.

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Stomach eversion in a line-caught shark – again!

In 2011 we published a paper in Fisheries Research reporting stomach eversion in a line-caught Shortfin Mako. A few days ago, an amateur naturalist posted footage of this rather spectacular behaviour on YouTube. Filmed with a Go Pro, this time it’s from a Caribbean Reef Shark. This is actually the only species from which voluntary stomach eversion in a free-living individual has been captured on tape.

Check your footage of line-caught sharks – stomach eversion happens VERY quickly and it’s easy to miss!


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Most exciting!

This is most exciting bull shark stuff: Christine Testerman from Mahmood‘s lab in Florida has presented the results of her genetic work at the recent meeting of the American Elasmobranch Society in Vancouver, Canada. You can find a copy of the poster here.

It turns out that the Fijian bull sharks are genetically differentiated from the rest of the Indo-Pacific. This is a surprising result and in our opinion most exciting (although not totally unexpected)!
More details to come once the paper is published.

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Ethics in marine ecology

See Correspondence in this week’s issue of Nature. Certainly something one must start thinking about!

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Advances in Fish Tagging and Marking Technology

Finally! Back in Februay 2008 I gave a presentation at the Advances in Fish Tagging and Marking Technology conference in New Zealand and a few months later submitted my talk as a research paper to be included in the proceedings of the conference. Now, after more than four years, the book has finally been published by the American Fisheries Society.


Fish marking and tracking is a fundamental tool for fisheries management and research. In recent years the technologies and analytical procedures available for marking and monitoring fisheries have evolved. The 31 chapters in this volume include papers on integrated approaches, conventional tagging, acoustic tags and arrays, radio telemetry, chemical and biological markers, and archival and pop-up satellite tags. This book will be appreciated by both fisheries scientists and managers for its coverage of many of the important advances in fish tagging technologies of the last two decades, the methods used to analyze data generated by these technologies, and the underlying management needs and objectives that only fish-marking and tagging can fulfill.

A PDF of our chapter “Diel oscillations in whale shark vertical movements associated with meso- and bathypelagic diving” can be downloaded from here.


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The current status of sharks & rays

Today I would like to draw your attention to a special issue of the Journal of Fish Biology: The current status of elasmobranchs: biology, fisheries and conservation.

Lots of interesting papers and information!

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Super exciting!

Neil is super excited about his group’s latest paper; and rightly so! Don’t bite the hand that feeds: assessing ecological impacts of provisioning ecotourism on an apex marine predator is one of those contributions I (and many others I’m sure!) have long been waiting for! Really good stuff! Here’s the press release. And you should also check out the video.

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The Great Fiji Shark Count

The Great Fiji Shark Count has been launched! Go to Mike’s blog for more information and background.


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Shark fishing in Fiji

Please go to Mike’s blog and read his post here. This is most disturbing!

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