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Biodiversity hotspots

Conservation science, strategy and tactics

Cultivation/depensation effects on juvenile survival and recruitment: Implications for the theory of fishing

Large, dominant fish species that are the basis of many fisheries may be naturally so successful due partly to "cultivation effects," where adults crop down forage species that are potential competitors/predators of their own juveniles. Such effects imply a converse impact when adult abundance is severely reduced by fishing: increases in forage species may then cause lagged, apparently depensatory decreases in juvenile survival. Depensatory effects can then delay or prevent stock rebuilding.

The precautionary approach in fisheries management: The devil is in the details

Alternative fisheries and the predation rate of yellowfin tuna in the eastern Pacific Ocean

Sharks and tunas: Fisheries impacts on predators with contrasting life histories

Large-scale pelagic fisheries exploit a diversity of apex predators with a wide range of life history strategies. Exploitation of species with different life history strategies has different population and food web consequences. We explored the changes in predation that result from exploitation of a common species with a slow growth and low fecundity life history strategy (blue shark, Prionace glauca) with those that result from exploitation of a common species with fast growth and high fecundity (yellowfin tuna, Thunnus albacares) in the central Pacific Ocean.

The role of sharks and longline fisheries in a pelagic ecosystem of the central Pacific

Development of Ecosim applications in the North Pacific

The sum of the parts equals?: Stabs at ecosystem modeling in the Gulf of Alaska

Ecosystem modeling in the Gulf of Alaska with implications for fisheries management, 19-21 August 2002