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<title>UTas ePrints - The role of coastal ocean variation in spatial and temporal patterns in survival and size of coho salmon (Oncorhynchus kisutch)</title>
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<meta content="Hobday, A. J." name="eprints.creators_name" />
<meta content="Boehlert, George" name="eprints.creators_name" />
<meta content="A.Hobday@utas.edu.au" name="eprints.creators_id" />
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<meta content="The role of coastal ocean variation in spatial and
temporal patterns in survival and size of coho
salmon (Oncorhynchus kisutch)" name="eprints.title" />
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<meta content="Interannual and decadal variability in ocean survival of salmon are well known, but the mechanisms through
which environmental variability exerts its effects are poorly understood. Data on hatchery-reared coho salmon
(Oncorhynchus kisutch) from individual releases (1973–1998) along the species’ entire North American range were
analyzed to provide information on survival and size. Three geographic regions (north of Vancouver Island, Puget
Sound and Strait of Georgia, and the outer coast south of the tip of Vancouver Island) showed coherent trends in
survival and size of returning fish. Within each region, multivariate nonlinear models were used to relate coho survival
and final size to spatially and temporally tailored environmental variables at time periods of release, jack return, and
adult return. The most important environmental variable, as indicated by the highest amount of variance explained, was
a calculated proxy for mixed-layer depth, followed by sea level. In all regions, survival and adult size were most
influenced by environmental conditions at the release time. A shallow mixed layer was associated with increased
survival and decreased size in all regions. Improved understanding of the relationship between environmental conditions
and size and survival of coho salmon provides insight into production patterns in the coastal ocean." name="eprints.abstract" />
<meta content="2001" name="eprints.date" />
<meta content="Canadian Journal of Fisheries and Aquatic Sciences" name="eprints.publication" />
<meta content="58" name="eprints.volume" />
<meta content="10" name="eprints.number" />
<meta content="2021-2036" name="eprints.pagerange" />
<meta content=" 10.1139/cjfas-58-10-2021" name="eprints.id_number" />
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(Oncorhynchus mykiss) populations. Fish. Oceanogr. 9: 17–32." name="eprints.referencetext" />
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<meta content="Boehlert, George" name="DC.creator" />
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<meta content="300704 Ecosystem Studies and Stock Assessment" name="DC.subject" />
<meta content="Interannual and decadal variability in ocean survival of salmon are well known, but the mechanisms through
which environmental variability exerts its effects are poorly understood. Data on hatchery-reared coho salmon
(Oncorhynchus kisutch) from individual releases (1973–1998) along the species’ entire North American range were
analyzed to provide information on survival and size. Three geographic regions (north of Vancouver Island, Puget
Sound and Strait of Georgia, and the outer coast south of the tip of Vancouver Island) showed coherent trends in
survival and size of returning fish. Within each region, multivariate nonlinear models were used to relate coho survival
and final size to spatially and temporally tailored environmental variables at time periods of release, jack return, and
adult return. The most important environmental variable, as indicated by the highest amount of variance explained, was
a calculated proxy for mixed-layer depth, followed by sea level. In all regions, survival and adult size were most
influenced by environmental conditions at the release time. A shallow mixed layer was associated with increased
survival and decreased size in all regions. Improved understanding of the relationship between environmental conditions
and size and survival of coho salmon provides insight into production patterns in the coastal ocean." name="DC.description" />
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<h1 class="ep_tm_pagetitle">The role of coastal ocean variation in spatial and temporal patterns in survival and size of coho salmon (Oncorhynchus kisutch)</h1>
<p style="margin-bottom: 1em" class="not_ep_block"><span class="person_name">Hobday, A. J.</span> and <span class="person_name">Boehlert, George</span> (2001) <xhtml:em>The role of coastal ocean variation in spatial and temporal patterns in survival and size of coho salmon (Oncorhynchus kisutch).</xhtml:em> Canadian Journal of Fisheries and Aquatic Sciences, 58 (10). pp. 2021-2036. ISSN 0706-652X</p><p style="margin-bottom: 1em" class="not_ep_block"></p><table style="margin-bottom: 1em" class="not_ep_block"><tr><td valign="top" style="text-align:center"><a onmouseover="EPJS_ShowPreview( event, 'doc_preview_3332' );" href="http://eprints.utas.edu.au/2529/1/Hobday_26_Boehlert2C_20012C_SalmonCJFAS.pdf" onmouseout="EPJS_HidePreview( event, 'doc_preview_3332' );"><img alt="[img]" src="http://eprints.utas.edu.au/style/images/fileicons/application_pdf.png" class="ep_doc_icon" border="0" /></a><div class="ep_preview" id="doc_preview_3332"><table><tr><td><img alt="" src="http://eprints.utas.edu.au/2529/thumbnails/1/preview.png" class="ep_preview_image" border="0" /><div class="ep_preview_title">Preview</div></td></tr></table></div></td><td valign="top"><a href="http://eprints.utas.edu.au/2529/1/Hobday_26_Boehlert2C_20012C_SalmonCJFAS.pdf"><span class="ep_document_citation">PDF</span></a> - Requires a PDF viewer<br />507Kb</td></tr></table><p style="margin-bottom: 1em" class="not_ep_block">Official URL: <a href="http://dx.doi.org/10.1139/cjfas-58-10-2021">http://dx.doi.org/10.1139/cjfas-58-10-2021</a></p><div class="not_ep_block"><h2>Abstract</h2><p style="padding-bottom: 16px; text-align: left; margin: 1em auto 0em auto">Interannual and decadal variability in ocean survival of salmon are well known, but the mechanisms through
which environmental variability exerts its effects are poorly understood. Data on hatchery-reared coho salmon
(Oncorhynchus kisutch) from individual releases (1973–1998) along the species’ entire North American range were
analyzed to provide information on survival and size. Three geographic regions (north of Vancouver Island, Puget
Sound and Strait of Georgia, and the outer coast south of the tip of Vancouver Island) showed coherent trends in
survival and size of returning fish. Within each region, multivariate nonlinear models were used to relate coho survival
and final size to spatially and temporally tailored environmental variables at time periods of release, jack return, and
adult return. The most important environmental variable, as indicated by the highest amount of variance explained, was
a calculated proxy for mixed-layer depth, followed by sea level. In all regions, survival and adult size were most
influenced by environmental conditions at the release time. A shallow mixed layer was associated with increased
survival and decreased size in all regions. Improved understanding of the relationship between environmental conditions
and size and survival of coho salmon provides insight into production patterns in the coastal ocean.</p></div><table style="margin-bottom: 1em" cellpadding="3" class="not_ep_block" border="0"><tr><th valign="top" class="ep_row">Item Type:</th><td valign="top" class="ep_row">Article</td></tr><tr><th valign="top" class="ep_row">Subjects:</th><td valign="top" class="ep_row"><a href="http://eprints.utas.edu.au/view/subjects/300000.html">300000 Agricultural, Veterinary and Environmental Sciences</a><br /><a href="http://eprints.utas.edu.au/view/subjects/300700.html">300000 Agricultural, Veterinary and Environmental Sciences > 300700 Fisheries Sciences</a><br /><a href="http://eprints.utas.edu.au/view/subjects/300704.html">300000 Agricultural, Veterinary and Environmental Sciences > 300700 Fisheries Sciences > 300704 Ecosystem Studies and Stock Assessment</a></td></tr><tr><th valign="top" class="ep_row">ID Code:</th><td valign="top" class="ep_row">2529</td></tr><tr><th valign="top" class="ep_row">Deposited By:</th><td valign="top" class="ep_row"><span class="ep_name_citation"><span class="person_name">Scholarly Publications Librarian</span></span></td></tr><tr><th valign="top" class="ep_row">Deposited On:</th><td valign="top" class="ep_row">26 Nov 2007 11:31</td></tr><tr><th valign="top" class="ep_row">Last Modified:</th><td valign="top" class="ep_row">09 Jan 2008 02:30</td></tr><tr><th valign="top" class="ep_row">ePrint Statistics:</th><td valign="top" class="ep_row"><a target="ePrintStats" href="/es/index.php?action=show_detail_eprint;id=2529;">View statistics for this ePrint</a></td></tr></table><p align="right">Repository Staff Only: <a href="http://eprints.utas.edu.au/cgi/users/home?screen=EPrint::View&eprintid=2529">item control page</a></p>
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