| Using hierarchical models to estimate effects of ocean anomalies on north-west Pacific Chinook salmon Oncorhynchus tshawytscha recruitment. | |
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MedLine Citation:
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PMID: 21078100 Owner: NLM Status: In-Process |
Abstract/OtherAbstract:
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The high variability in survival over the past three decades of north-west Pacific Chinook salmon Oncorhynchus tshawytscha is summarized for 24 stocks and analysed using hierarchical Bayesian models. Results from a simple model indicate that recruitment anomalies appear to be correlated in time and space. A simple model with a covariate based on basin-scale effects (Pacific Decadal Oscillation and El Niño Southern Oscillation) and local-scale effects (sea surface temperature, SST anomaly) was introduced to explain this variability. The model still exhibited residual patterns that were removed when a random-walk component was added to the model. The analysis indicates that recruitment is negatively related to SST anomaly for all stocks and the effect of basin-scale variables is negligible. The effect of climate over the next century is expected to result in estimated recruitment declining by an average of 13% for O. tshawytscha stocks coastwide. |
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Authors:
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R Sharma; M Liermann |
Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2010-10-04 |
Journal Detail:
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Title: Journal of fish biology Volume: 77 ISSN: 1095-8649 ISO Abbreviation: J. Fish Biol. Publication Date: 2010 Nov |
Date Detail:
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Created Date: 2010-11-16 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0214055 Medline TA: J Fish Biol Country: England |
Other Details:
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Languages: eng Pagination: 1948-63 Citation Subset: IM |
Copyright Information:
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© 2010 The Authors. Journal of Fish Biology © 2010 The Fisheries Society of the British Isles. |
Affiliation:
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Columbia River Inter-Tribal Fish Commission, 729 NE Oregon St, Suite 200, Portland, OR 97232, USA. shar@critfc.org |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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