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National Center for Ecological Analysis and Synthesis

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3621-3630 of 6248
  1. Publication

    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.

  2. Publication

    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.

  3. Publication

    Development of Ecosim applications in the North Pacific

  4. Publication

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

  5. Publication

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

  6. Publication

    Effects of climate change on marine population abundance, and consequences for fisheries management