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Resource Ecology and Ecosystem Modeling - Home

The Resource Ecology and Ecosystem Modeling Task at the Alaska Fisheries Science Center focuses on the collection and analysis of data relating to trophic interactions in the North Pacific and incorporation of these data into environmental assessments and single-species and multispecies models. Systematic collection and analysis of groundfish food habits data is performed. Data on size-at-age is integrated with bioenergetic information to estimate food consumption rates by fish populations. Information on marine mammal and bird diet is obtained from other Center programs or outside researchers. Quantifying food web linkages is essential to increase our understanding of how external forces such as fishing may cause unanticipated shifts in ecosystem composition. The importance of this research is also elevated given the increasing emphasis on fishery-mammal interactions: groundfish predation interactions are an important part of knowing the true nature of resource availability to mammals and birds.

Stomach samples are collected at virtually no cost to the program, utilizing fishery observers and existing assessment cruises for collection platforms. Samples are analyzed in the laboratory and entered into a food habits database. These data allow assessment of factors influencing individual species food habits, including interannual changes. Predation effects by groundfish populations are then quantified and incorporated into assessment models.



Recent Publications, Poster Presentations, Reports & Activities

  • Final Ecosystem Considerations (.pdf) for the North Pacific Groundfish Stock Assessment and Fishery Evaluation Report - Updated November 2015
     
  • Trophic structure of the eastern Chukchi Sea: an updated mass balance food web model.
    WHITEHOUSE, G. A., and K. Y. AYDIN. 2016. Trophic structure of the eastern Chukchi Sea: an updated mass balance food web model. U.S. Dep. Commer., NOAA Tech. Memo. NMFS-AFSC-318, 175 p. Online (.pdf, 2.8 MB).  Online.
     
  • Updated maturity estimates for flatfishes (Pleuronectidae) in the eastern Bering Sea, with implications for fisheries management.
    TENBRINK, T. T., and T. K. WILDERBUER. 2015. Updated maturity estimates for flatfishes (Pleuronectidae) in the eastern Bering Sea, with implications for fisheries management. Mar. Coast. Fish. 7:474-482. DOI:10.1080/19425120.2015.1091411. (.pdf, 577 KB, Open Access).  Online.
     
  • Foraging strategies of Laysan albatross inferred from stable isotopes: Implications for association with fisheries.
    EDWARDS, A. E., S. M. FITZGERALD, J. K. PARRISH, J. L. KLAVITTER, and M. D. ROMANO. 2015. Foraging strategies of Laysan albatross inferred from stable isotopes: Implications for association with fisheries. PLoS ONE 10:e0133471. 10.1371/journal.pone.0133471. (.pdf, 849 KB, open access).   Online.
     
  • Trophic Guilds of The Eastern Chukchi Sea Demersal Fish Community
    By:  G. ANDREW WHITEHOUSE, TROY W. BUCKLEY, RICHARD E. HIBPSHMAN, CAROLINE L. ROBINSON, SEAN K. ROHAN, KIMBERLY A. SAWYER
    Conference:  American Fisheries Society, 145th Annual Meeting, Portland, OR, Aug 2015
    (2015 poster, .pdf, 1.94 MB)   Online.

     
  • Patterns in Octopus Predation by Pacific Cod, Gadus macrocephalus, in the Eastern Bering Sea
    By:  SEAN K. ROHAN, TROY W. BUCKLEY
    Conference:  American Fisheries Society, 145th Annual Meeting, Portland, OR, Aug 2015
    (2015 poster, .pdf, 1.27 MB)   Online.

     
  • Generating Data for Food Habits Models Resource Ecology and Ecosystem Modeling Trophic Interactions Laboratory
    By:  RICHARD E. HIBPSHMAN, KIMBERLY A. SAWYER, SEAN K. ROHAN, CAROLINE L. ROBINSON, TROY W. BUCKLEY, GEOFFREY M. LANG, MEI-SUN YANG, KERIM Y. AYDIN
    Conference:  American Fisheries Society, 145th Annual Meeting, Portland, OR, Aug 2015
    (2015 poster, .pdf, 24.7 MB)   Online.

     
  • Trophic Interactions Sampling and Analysis

  • Ecosystem Considerations 2015: The Status of Alaska's Marine Ecosystems

  • REEM Participates in World Seabird Conference

  • Ecosystem Modeling (food web modeling software)


See the publications and poster databases for additional listings.

 

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