Reproduction: Secret Weapon of the Dogfish?
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Spiny dogfish are one of the rare success stories in the management of
shark fisheries, with the U.S. Atlantic population representing one of
the few shark stocks ever to fully recover from overfishing.
At first glance this doesn’t seem to make any sense: spiny dogfish are
one of the longest-lived and slowest-growing of the sharks that
regularly interact with human beings, and with a 2-year pregnancy it
doesn’t seem as though they could replace their numbers in anything less
than the decades that have gone by without successful recovery from
several other heavily-fished sharks. So how have spiny dogfish been
able to succeed in recovering from overfishing where so many other
sharks struggle? The answer may very well be in adaptations related to
that seemingly long reproductive cycle of theirs.
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My take on Brian Rothschild fisheries science lecture last night at Friend Room
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A major aspect of the presentation was based on the fact that that the cod populations off Canada have not recovered despite years of essentially no fishing effort.
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Alaska trawl survey vessels underway
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Alaska Fisheries Science Center has just launched its biennial comprehensive survey in the Gulf of Alaska, during which National Oceanic and Atmospheric Administration researchers will help determine the next catch rates.
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Gloomiest predictions of fisheries are significantly exaggerated
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Two University of Washington scientists have just published a study in the journal Conservation Biology in collaboration with colleagues from Rutgers University and Dalhousie University arguing that the gloomiest predictions about the world’s fisheries are significantly exaggerated.
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New Method for Measuring Biomass Reveals Fish Stocks Are More Stable Than Widely Believed
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ScienceDaily - Apr. 28, 2011 — Fish and marine species are among the most threatened wildlife on earth, due partly to over exploitation by fishing fleets. Yet there are differences in assessing trends in worldwide fishing stocks which, researchers writing in Conservation Biology argue, stem from inappropriate use of time trends in catches.
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