December 9, 2009 Featured Article Read More →

Catch and release

Very little work has been carried out in the UK to show the mortality rates on fish released by rod and line anglers; consequently much of the findings below are based on fish from overseas.

A study http://www.acuteangling.com/Reference/C&RMortality.html

was carried out on a variety of different species ( non Shark ) The study suggests an average successful return rate of 97.23% without consideration of optimized techniques. The study claims the use of specific tackle types and fishing techniques, use of codes of practise etc. can significantly reduce the 2.73% mortality rate.

And on sharks

From http://cat.inist.fr/?aModele=afficheN&cpsidt=19994785

Our results suggest, therefore, that oxygen delivery following exhaustive exercise is not necessarily compromised in juvenile sandbar sharks, and that hook and line capture and subsequent release do not increase rates of mortality,

From http://www.mass.gov/dfwele/dmf/programsandprojects/catch.htm

Tag recaptures of blue sharks, yellow-fin tuna, and bluefin tuna that were previously blood sampled by the study provided long-term evidence that these fish were not physiologically compromised by the angling experience or the tagging.

The results of this study http://www.mass.gov/eea/agencies/dfg/dmf/programs-and-projects/catch-and-release-survivorship-of-big-game-fish.html support the hypothesis that pelagic game fish and sharks are capable of recovery when handled properly.

The report http://www.mesa.edu.au/seaweek2005/pdf/infosheet10.pdf

Suggest “Sharks appear to recover much faster than other fishes from the stress of being hooked”.

This study http://www.flmnh.ufl.edu/fish/organizations/ssg/sharknews/sn7/shark7news14.htm sums the situation up well

“Properly implemented, the tagging of sharks by sport fishermen provides a wealth of new information and immeasurably adds to global efforts to conserve shark species”.

Posted in: Infocentre, Shark Bites
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