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Assessing levies for by-catch could fund conservation measures

Fishing industry lines accidentally catch so many seabirds and turtles that their populations are being threatened. One solution offered by a Cornell researcher and an Australian government scientist is to assess fines when threatened species are caught and killed.

That money, the researchers suggest in the August issue of Frontiers in Ecology and the Environment, could be used to address other causes of species decline, such as pollution and invasive predators.

This dual approach, they say, would give fishermen financial incentives to find creative ways to avoid catching noncommercial species, known as by-catch, while providing funds to address more hazardous threats to seabirds and turtles. For example, while almost half of all seabirds listed by the World Conservation Union are directly or indirectly threatened by fishing, as many as three-quarters of those species are also threatened by such invasive species as cats and rats at breeding colonies.

"Fisheries are complex, revenue-generating industries, and large majorities are unregulated," said Josh Donlan, a co-author of the paper and a graduate student in ecology and evolutionary biology at Cornell. "Once you add in the cost of doing conservation, this is a win-win situation for a lot of endangered seabirds and sea turtles that are impacted by fisheries' by-catch."

Donlan and co-author Chris Wilcox, a senior research scientist at Australia's Commonwealth Scientific and Industrial Research Organization, used Australia's Eastern Tuna and Billfish Fishery as a case study to test the benefits and costs of their approach, called compensatory mitigation. The fishery extends from Cape York, Queensland, to the South Australia/Victoria border and targets albacore, yellowfin and bigeye tuna and billfish. However, each year the fishery unintentionally kills 1,800 to 4,500 flesh-footed shearwaters (Puffinus carneipus), a seabird whose entire eastern Australian population breeds on Lord Howe Is
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Contact: Blaine Friedlander
bpf2@cornell.edu
607-254-8093
Cornell University News Service
18-Jul-2007


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