This Month at WFRC

Release Date:

This page contains WFRC "Highlights" reported May, 2020

New Publication

New publication examines Chinook salmon growth during early marine survival period:  Size, growth and body condition are crucial determinants of survival and recruitment for a variety of fish species. For Pacific salmon, growth during the early marine period is positively associated with survival and recruitment, so it is important to understand how certain foraging strategies may bolster growth in estuarine and marine environments during this stage. In a recent paper in Marine Ecology Progress Series, scientists from Washington Cooperative Fish and Wildlife Research Unit at University of Washington, NOAA Northwest Fisheries Science Center, USGS Western Fisheries Research Center, USGS Western Ecological Research Center, and Dartmouth College examine differences in diet among various regions and habitats in Puget Sound and how diet composition and energetic quality of prey affect growth rate variability. The scientists found that higher levels of piscivory and other dietary patterns promoted faster growth for subyearling Chinook salmon in northern Puget Sound nearshore and offshore habitats compared to subyearlings in similar habitats in the southern and central Puget Sound regions. Findings from this study highlight the spatio-temporal difference in prey quantity, prey profitability, and individual foraging strategies result in variable growth rates among salmon populations.. 

Contact Dave Beauchamp (fadave@usgs.gov).

Davis M.J., J.W. Chamberlin, J.R. Gardner, K.A. Connelly, M.M. Gamble, B.R. Beckman, and D.A. Beauchamp. 2020. Variable prey consumption leads to distinct regional differences in Chinook salmon growth during the early marine critical period. Mar. Ecol. Prog. Ser. 640: 147-169. DOI: https://doi.org/10.3354/meps13279