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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 for the
North Pacific Groundfish Stock Assessment and Fishery Evaluation
Report - Updated November 2016 - Aleutian Islands Marine Ecosystem(.pdf), Eastern Bering Sea Marine Ecosystem(.pdf), Gulf of Alaska Marine Ecosystem(.pdf)
- Diet compositions and trophic guild structure of the eastern Chukchi Sea demersal fish community
WHITEHOUSE G. A., T. W. BUCKLEY, and S. L. DANIELSON. 2017. Diet compositions and trophic guild structure of the eastern Chukchi Sea demersal fish community. Deep-Sea Res. II 135:95-110. http://dx.doi.org/10.1016/j.dsr2.2016.03.010 Online. - Seabird bycatch and mitigation efforts in Alaska fisheries Summary Report: 2007 through 2015
EICH, A.M., K.R. MABRY, S.K. WRIGHT, and S.M. FITZGERALD. 2016. Seabird bycatch and mitigation efforts in Alaska
fisheries Summary Report: 2007 through 2015. U.S. Dep. Commer., NOAA Tech. Memo. NMFS-F/AKR-12, 47 p.
Online. - Spatio-temporal distribution of euphausiids: an important component to understanding ecosystem processes in the Gulf of Alaska and eastern Bering Sea.
SIMONSEN, K. A., P. H. RESSLER, C. N. ROOPER, and S. G. ZADOR.
2016. Spatio-temporal distribution of euphausiids: an important component to understanding ecosystem processes in the Gulf of Alaska and eastern Bering Sea. ICES J. Mar. Sci. 73:2020-2036. http://dx.doi.org/10.1093/icesjms/fsv272 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
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Ecosystem Considerations 2015: The Status of Alaska's Marine Ecosystems
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REEM Participates in World Seabird Conference
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Ecosystem Modeling (food web modeling software)
See the publications and poster databases for additional listings.
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