Skip to Main Content
U.S. Forest Service
Caring for the land and serving people

United States Department of Agriculture

Home > Search > Publication Information

  1. Share via EmailShare on FacebookShare on LinkedInShare on Twitter
    Dislike this pubLike this pub
    Author(s): Luca A. Adelfio; Steven M. Wondzell; Nathan J. Mantua; Gordon H. Reeves
    Date: 2019
    Source: Canadian Journal of Fisheries and Aquatic Sciences. 76(8): 1362-1375.
    Publication Series: Scientific Journal (JRNL)
    Station: Pacific Northwest Research Station
    PDF: Download Publication  (1.0 MB)

    Description

    We quantified the sum of daily mean temperature above 0 °C and modeled incubation duration using water temperature data collected at 12 coho salmon (Oncorhynchus kisutch) spawning sites during two incubation periods with cool, snow dominant conditions and three incubation periods with anomalously warm, rain-transitional conditions, a proxy for a future climate scenario. Warmer water temperatures during warm–rain-transitional winters yielded a 58-day reduction in the median duration of egg incubation; however, the magnitude of change at individual sites varied widely and was controlled by water source. At groundwater-fed sites, temperature variations were strongly attenuated, leading to small interannual differences in incubation duration that were relatively insensitive to short-term changes in air temperature. In contrast, modeled incubation duration was shortened by up to 3 months during warm–rain-transitional winters at precipitation-fed sites. Remarkably, our modeling showed increased uniformity in incubation duration across the landscape during warm–rain-transitional winters. The potential loss of diversity in incubation duration during warmer winters, in isolation, may reduce portfolio effects in this region’s coho salmon population by promoting greater synchronization in the time of spawning.

    Publication Notes

    • Visit PNW's Publication Request Page to request a hard copy of this publication.
    • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

    Citation

    Adelfio, Luca A.; Wondzell, Steven M.; Mantua, Nathan J.; Reeves, Gordon H. 2019. Warm winters reduce landscape-scale variability in the duration of egg incubation for coho salmon (Oncorhynchus kisutch) on the Copper River Delta, Alaska. Canadian Journal of Fisheries and Aquatic Sciences. 76(8): 1362-1375. https://doi.org/10.1139/cjfas-2018-0152.

    Cited

    Google Scholar

    Keywords

    Coho salmon, Pacific salmon, egg incubation, water temperature.

    Related Search


    XML: View XML
Show More
Show Fewer
Jump to Top of Page
https://www.fs.usda.gov/treesearch/pubs/58964