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Short Winters Threaten Temperate Fish Populations

OHSU-RS-1519: Short Winters Threaten Temperate Fish Populations

Published: Jul 15, 2015
Last Modified: May 4, 2016
Volume: 6 Issue:
Length: 9 pages
Journal: Nature Communications
Direct: Permalink

Contributors

Elizabeth Marschall

Chair, OSU Aquatic Ecology Laboratory

Konrad Dabrowski

Professor, OSU School of Environment & Natural Resources

Stuart Ludsin

Director, OSU Aquatic Ecology Laboratory

Abstract

Although climate warming is expected to benefit temperate ectotherms by lengthening the summer growing season, declines in reproductive success following short, warm winters may counter such positive effects. Here we present long-term (1973–2010) field patterns for Lake Erie yellow perch,Perca flavescens, which show that failed annual recruitment events followed short, warm winters. Subsequent laboratory experimentation and field investigations revealed how reduced reproductive success following short, warm winters underlie these observed field patterns. Following short winters, females spawn at warmer temperatures and produce smaller eggs that both hatch at lower rates and produce smaller larvae than females exposed to long winters. Our research suggests that continued climate warming can lead to unanticipated, negative effects on temperate fish populations.