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Season and prey type influence size dependency of predator−prey body mass ratios in a marine fish assemblage

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dc.creator Reum, Jonathan C. P.
dc.creator Hunsicker, Mary E.
dc.date.accessioned 2012-11-16T21:10:06Z
dc.date.available 2012-11-16T21:10:06Z
dc.date.issued 2012-10-15
dc.identifier.citation Reum JCP, Hunsicker ME (2012) Season and prey type influence size dependency of predator−prey body mass ratios in a marine fish assemblage. Marine Ecology Progress Series 466:167-175 en_US
dc.identifier.uri http://hdl.handle.net/1957/35096
dc.description This is the publisher’s final pdf. The published article is copyrighted by Inter-Research and can be found at: http://www.int-res.com/journals/meps/meps-home/. To the best of our knowledge, one or more authors of this paper were federal employees when contributing to this work. en_US
dc.description.abstract Marine and freshwater food webs are strongly structured by size-dependent predator−prey interactions. Predator−prey body mass ratios (PPMR) are important parameters in size-based food-web models, but studies evaluating the temporal stability of PPMR or its relationship to predator feeding modes are scant. Using a large data set of predator−prey pairs from a diverse fish community sampled in summer, fall, and winter, we showed that community-level PPMR varied with predator mass in a nonlinear (dome-shaped) manner. PPMR was higher in the summer relative to the fall and winter for all predator body size classes regardless of whether prey were fish or invertebrate. Further, the size dependency of PPMR was dome-shaped for invertebrate prey but positive and linear for fish prey. We empirically show that community-level PPMR is dynamic rather than fixed, which is in agreement with general expectations set by simulation studies of biomass spectra. However, we are presently unable to identify the specific processes underlying these patterns. Size-based models of marine ecosystems offer considerable promise over traditional taxa-based approaches, and our analyses provide insight into major patterns of variation in PPMR in a temperate marine system. en_US
dc.description.sponsorship Funding for J.C.P.R. was provided by the Vincent Liguori Fellowship and the University of Washington Climate Impacts Group. Boat time was financed by a University of Washington Research Royalties Fund awarded to T. Essington. en_US
dc.language.iso en_US en_US
dc.publisher Inter-Research en_US
dc.relation.ispartofseries Marine Ecology Progress Series en_US
dc.relation.ispartofseries Vol. 466 (2012) en_US
dc.subject Body mass en_US
dc.subject Demersal fish en_US
dc.subject Feeding interactions en_US
dc.subject Food web en_US
dc.subject Puget Sound en_US
dc.subject Size spectra en_US
dc.subject Trophic level en_US
dc.title Season and prey type influence size dependency of predator−prey body mass ratios in a marine fish assemblage en_US
dc.type Article en_US
dc.description.peerreview yes en_US
dc.identifier.doi 10.3354/meps09913

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