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Developing ecological escapement goals for Pacific salmon: Role of marine derived nutrients in the health and sustainability of resident and anadromous fishes of the Yukon drainage

Duration

January 2006 - December 2010

Narrative

The objectives of this study are to determine: 1) the biological extent of marine-derived nutrients (MDN) presence in riverine ecosystems (e.g., measure how much MDN are sequestered by fishes and other biota), 2) the magnitude of MDN influence across broad geographic scales (e.g., initially across the Yukon Delta, Yukon Flats, and into Canada within the Yukon River drainage), 3) if certain fishes benefit from the spawning runs of others (e.g., do chinook juveniles and resident fishes benefit from chum runs?), 4) roles and significance of MDN in fish health, and 5) if there is a spawner density-dependent response by consumers (e.g., do more spawners equate to greater food web effects?). Investigators predict that: 1) MDN are critically important to riverine biota across broad geographic scales, 2) fish species benefit from the spawning runs of others, 3) MDN improves fish health (e.g., fish condition, and lipid and fatty acid content), and 4) there is a density-dependent response (fish in habitats with higher spawner densities benefit more than those in habitats with fewer spawners). Data from this study will contribute to the long-term goal of constructing ecological escapement models that predict the levels of salmon returns necessary for supporting fish, wildlife and plant species, and ecosystem sustainability in Alaska.

 

Current Staff

Federal Staff: 4

Masters Students: 5

Phd Students: 5

Post Docs: 2

University Staff: 2

5 Year Summary

Students graduated: 25

Scientific Publications: 129

Presentations: 225

 

Personnel

  • Mark WipfliPrincipal Investigator
  • Christine ApodacaStudent

Funding Agencies

  • Science Support Partnership

Links

Alaska Cooperative Fish and Wildlife Research Unit Cooperators

  1. Alaska Department of Fish and Game
  2. U.S. Fish and Wildlife Service
  3. U.S. Geological Survey
  4. University of Alaska Fairbanks
  5. Wildlife Management Institute