Climate and competition influence sockeye salmon population dynamics across the Northeast Pacific Ocean

Connors, Brendan; Malick, Michael J.; Ruggerone, Gregory T.; Rand, Pete; Adkison, Milo; Irvine, James R.; Campbell, Robert; Gorman, Kristen

doi:10.1139/cjfas-2019-0422

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The NOAA IR serves as an archival repository of NOAA-published products including scientific findings, journal articles, guidelines, recommendations, or other information authored or co-authored by NOAA or funded partners. As a repository, the NOAA IR retains documents in their original published format to ensure public access to scientific information.

i

Climate and competition influence sockeye salmon population dynamics across the Northeast Pacific Ocean

2020
By Connors, Brendan ; Malick, Michael J. ; Ruggerone, Gregory T. ; ...
Source: Canadian Journal of Fisheries and Aquatic Sciences, 77(6), 943-949

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Details:

Journal Title:

Canadian Journal of Fisheries and Aquatic Sciences
Personal Author:

Connors, Brendan ; Malick, Michael J. ; Ruggerone, Gregory T. ; Rand, Pete ; Adkison, Milo ; ... More +

Connors, Brendan ; Malick, Michael J. ; Ruggerone, Gregory T. ; Rand, Pete ; Adkison, Milo ; Irvine, James R. ; Campbell, Robert ; Gorman, Kristen Less -
NOAA Program & Office:

NMFS (National Marine Fisheries Service) ; NWFSC (Northwest Fisheries Science Center)

NMFS (National Marine Fisheries Service) ; NWFSC (Northwest Fisheries Science Center) Less -
Description:

Pacific salmon productivity is influenced by ocean conditions and interspecific interactions, yet their combined effects are poorly understood. Using data from 47 North American sockeye salmon (Oncorhynchus nerka) populations, we present evidence that the magnitude and direction of climate and competition effects vary over large spatial scales. In the south, a warm ocean and abundant salmon competitors combined to strongly reduce sockeye productivity, whereas in the north, a warm ocean substantially increased productivity and offset the negative effects of competition at sea. From 2005 to 2015, the approximately 82 million adult pink salmon (Oncorhynchus gorbuscha) produced annually from hatcheries were estimated to have reduced the productivity of southern sockeye salmon by ∼15%, on average. In contrast, for sockeye at the northwestern end of their range, the same level of hatchery production was predicted to have reduced the positive effects of a warming ocean by ∼50% (from a ∼10% to a ∼5% increase in productivity, on average). These findings reveal spatially dependent effects of climate and competition on sockeye productivity and highlight the need for international discussions about large-scale hatchery production.
Keywords:

[+]

Aquatic Science Ecology, Evolution, Behavior And Systematics
Source:

Canadian Journal of Fisheries and Aquatic Sciences, 77(6), 943-949
DOI:

https://doi.org/10.1139/cjfas-2019-0422
ISSN:

0706-652X;1205-7533;
Format:

PDF
Publisher:

Canadian Science Publishing
Document Type:

Journal Article
License:

https://creativecommons.org/licenses/by/4.0/
Rights Information:

CC BY
Compliance:

Library
Main Document Checksum:

[+]

urn:sha256:3a7bf6e16421f9b3feaeb7d2b87731c306dcfdb2587ce66026786349acc903f7
Download URL:

https://repository.library.noaa.gov/view/noaa/52906/noaa_52906_DS1.pdf
File Type:

[PDF-1.49 MB]

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