Size-Based Hydroacoustic Measures of Within-Season Fish Abundance in a Boreal Freshwater Ecosystem
Identifieur interne : 000011 ( Pmc/Checkpoint ); précédent : 000010; suivant : 000012Size-Based Hydroacoustic Measures of Within-Season Fish Abundance in a Boreal Freshwater Ecosystem
Auteurs : Riley A. Pollom ; George A. RoseSource :
- PLoS ONE [ 1932-6203 ] ; 2015.
Abstract
Eleven sequential size-based hydroacoustic surveys conducted with a 200 kHz split-beam transducer during the summers of 2011 and 2012 were used to quantify seasonal declines in fish abundance in a boreal reservoir in Manitoba, Canada. Fish densities were sufficiently low to enable single target resolution and tracking. Target strengths converted to log2-based size-classes indicated that smaller fish were consistently more abundant than larger fish by a factor of approximately 3 for each halving of length. For all size classes, in both years, abundance (natural log) declined linearly over the summer at rates that varied from -0.067.day-1 for the smallest fish to -0.016.day-1 for the largest (R2 = 0.24–0.97). Inter-annual comparisons of size-based abundance suggested that for larger fish (>16 cm), mean winter decline rates were an order of magnitude lower (-0.001.day-1) and overall survival higher (71%) than in the main summer fishing season (mean loss rate -0.038.day-1; survival 33%). We conclude that size-based acoustic survey methods have the potential to assess within-season fish abundance dynamics, and may prove useful in long-term monitoring of productivity and hence management of boreal aquatic ecosystems.
Url:
DOI: 10.1371/journal.pone.0124799
PubMed: 25875467
PubMed Central: 4398392
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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">Size-Based Hydroacoustic Measures of Within-Season Fish Abundance in a Boreal Freshwater Ecosystem</title><author><name sortKey="Pollom, Riley A" sort="Pollom, Riley A" uniqKey="Pollom R" first="Riley A." last="Pollom">Riley A. Pollom</name><affiliation><nlm:aff id="aff001"></nlm:aff></affiliation></author><author><name sortKey="Rose, George A" sort="Rose, George A" uniqKey="Rose G" first="George A." last="Rose">George A. Rose</name><affiliation><nlm:aff id="aff001"></nlm:aff></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">PMC</idno><idno type="pmid">25875467</idno><idno type="pmc">4398392</idno><idno type="url">http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4398392</idno><idno type="RBID">PMC:4398392</idno><idno type="doi">10.1371/journal.pone.0124799</idno><date when="2015">2015</date><idno type="wicri:Area/Pmc/Corpus">000007</idno><idno type="wicri:explorRef" wicri:stream="Pmc" wicri:step="Corpus" wicri:corpus="PMC">000007</idno><idno type="wicri:Area/Pmc/Curation">000007</idno><idno type="wicri:explorRef" wicri:stream="Pmc" wicri:step="Curation">000007</idno><idno type="wicri:Area/Pmc/Checkpoint">000011</idno><idno type="wicri:explorRef" wicri:stream="Pmc" wicri:step="Checkpoint">000011</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a" type="main">Size-Based Hydroacoustic Measures of Within-Season Fish Abundance in a Boreal Freshwater Ecosystem</title><author><name sortKey="Pollom, Riley A" sort="Pollom, Riley A" uniqKey="Pollom R" first="Riley A." last="Pollom">Riley A. Pollom</name><affiliation><nlm:aff id="aff001"></nlm:aff></affiliation></author><author><name sortKey="Rose, George A" sort="Rose, George A" uniqKey="Rose G" first="George A." last="Rose">George A. Rose</name><affiliation><nlm:aff id="aff001"></nlm:aff></affiliation></author></analytic><series><title level="j">PLoS ONE</title><idno type="eISSN">1932-6203</idno><imprint><date when="2015">2015</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"><p>Eleven sequential size-based hydroacoustic surveys conducted with a 200 kHz split-beam transducer during the summers of 2011 and 2012 were used to quantify seasonal declines in fish abundance in a boreal reservoir in Manitoba, Canada. Fish densities were sufficiently low to enable single target resolution and tracking. Target strengths converted to log<sub>2</sub>-based size-classes indicated that smaller fish were consistently more abundant than larger fish by a factor of approximately 3 for each halving of length. For all size classes, in both years, abundance (natural log) declined linearly over the summer at rates that varied from -0.067.day<sup>-1</sup> for the smallest fish to -0.016.day<sup>-1</sup> for the largest (R<sup>2</sup> = 0.24–0.97). Inter-annual comparisons of size-based abundance suggested that for larger fish (>16 cm), mean winter decline rates were an order of magnitude lower (-0.001.day<sup>-1</sup>) and overall survival higher (71%) than in the main summer fishing season (mean loss rate -0.038.day<sup>-1</sup>; survival 33%). We conclude that size-based acoustic survey methods have the potential to assess within-season fish abundance dynamics, and may prove useful in long-term monitoring of productivity and hence management of boreal aquatic ecosystems.</p></div></front><back><div1 type="bibliography"><listBibl><biblStruct><analytic><author><name sortKey="Blanchard, Jm" uniqKey="Blanchard J">JM Blanchard</name></author><author><name sortKey="Jennings, S" uniqKey="Jennings S">S Jennings</name></author><author><name sortKey="Law, R" uniqKey="Law R">R Law</name></author><author><name sortKey="Castle, Md" uniqKey="Castle M">MD Castle</name></author><author><name sortKey="Mccloghrie, P" uniqKey="Mccloghrie P">P McCloghrie</name></author><author><name sortKey="Rochet, M J" uniqKey="Rochet M">M-J Rochet</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Brose, U" uniqKey="Brose U">U Brose</name></author><author><name sortKey="Jonsson, T" uniqKey="Jonsson T">T 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<front><journal-meta><journal-id journal-id-type="nlm-ta">PLoS One</journal-id><journal-id journal-id-type="iso-abbrev">PLoS ONE</journal-id><journal-id journal-id-type="publisher-id">plos</journal-id><journal-id journal-id-type="pmc">plosone</journal-id><journal-title-group><journal-title>PLoS ONE</journal-title></journal-title-group><issn pub-type="epub">1932-6203</issn><publisher><publisher-name>Public Library of Science</publisher-name><publisher-loc>San Francisco, CA USA</publisher-loc></publisher></journal-meta><article-meta><article-id pub-id-type="pmid">25875467</article-id><article-id pub-id-type="pmc">4398392</article-id><article-id pub-id-type="doi">10.1371/journal.pone.0124799</article-id><article-id pub-id-type="publisher-id">PONE-D-14-37592</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title>Size-Based Hydroacoustic Measures of Within-Season Fish Abundance in a Boreal Freshwater Ecosystem</article-title><alt-title alt-title-type="running-head">Size-Based Measures of Freshwater Fish Abundance</alt-title></title-group><contrib-group><contrib contrib-type="author"><name><surname>Pollom</surname><given-names>Riley A.</given-names></name><xref ref-type="author-notes" rid="currentaff001"><sup>¤</sup></xref><xref rid="cor001" ref-type="corresp">*</xref><xref ref-type="aff" rid="aff001"></xref></contrib><contrib contrib-type="author"><name><surname>Rose</surname><given-names>George A.</given-names></name><xref ref-type="aff" rid="aff001"></xref></contrib></contrib-group><aff id="aff001"><addr-line>Centre for Fisheries Ecosystems Research, Fisheries and Marine Institute of Memorial University of Newfoundland, St. John's, Newfoundland and Labrador, Canada</addr-line></aff><contrib-group><contrib contrib-type="editor"><name><surname>Deng</surname><given-names>Z. Daniel</given-names></name><role>Academic Editor</role><xref ref-type="aff" rid="edit1"></xref></contrib></contrib-group><aff id="edit1"><addr-line>Pacific Northwest National Laboratory, UNITED STATES</addr-line></aff><author-notes><fn fn-type="conflict" id="coi001"><p><bold>Competing Interests: </bold>The authors have declared that no competing interests exist.</p></fn><fn fn-type="con" id="contrib001"><p>Conceived and designed the experiments: RP GR. Performed the experiments: RP GR. Analyzed the data: RP GR. Contributed reagents/materials/analysis tools: RP GR. Wrote the paper: RP GR.</p></fn><fn fn-type="current-aff" id="currentaff001"><label>¤</label><p>Current Address: Project Seahorse, Fisheries Centre of The University of British Columbia, Vancouver, British Columbia, Canada</p></fn><corresp id="cor001">* E-mail: <email>r.pollom@fisheries.ubc.ca</email></corresp></author-notes><pub-date pub-type="epub"><day>15</day><month>4</month><year>2015</year></pub-date><pub-date pub-type="collection"><year>2015</year></pub-date><volume>10</volume><issue>4</issue><elocation-id>e0124799</elocation-id><history><date date-type="received"><day>25</day><month>8</month><year>2014</year></date><date date-type="accepted"><day>18</day><month>3</month><year>2015</year></date></history><permissions><copyright-year>2015</copyright-year><copyright-holder>Pollom, Rose</copyright-holder><license xlink:href="http://creativecommons.org/licenses/by/4.0/"><license-p>This is an open access article distributed under the terms of the <ext-link ext-link-type="uri" xlink:href="http://creativecommons.org/licenses/by/4.0/">Creative Commons Attribution License</ext-link>, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited</license-p></license></permissions><self-uri content-type="pdf" xlink:type="simple" xlink:href="pone.0124799.pdf"></self-uri><abstract><p>Eleven sequential size-based hydroacoustic surveys conducted with a 200 kHz split-beam transducer during the summers of 2011 and 2012 were used to quantify seasonal declines in fish abundance in a boreal reservoir in Manitoba, Canada. Fish densities were sufficiently low to enable single target resolution and tracking. Target strengths converted to log<sub>2</sub>-based size-classes indicated that smaller fish were consistently more abundant than larger fish by a factor of approximately 3 for each halving of length. For all size classes, in both years, abundance (natural log) declined linearly over the summer at rates that varied from -0.067.day<sup>-1</sup> for the smallest fish to -0.016.day<sup>-1</sup> for the largest (R<sup>2</sup> = 0.24–0.97). Inter-annual comparisons of size-based abundance suggested that for larger fish (>16 cm), mean winter decline rates were an order of magnitude lower (-0.001.day<sup>-1</sup>) and overall survival higher (71%) than in the main summer fishing season (mean loss rate -0.038.day<sup>-1</sup>; survival 33%). We conclude that size-based acoustic survey methods have the potential to assess within-season fish abundance dynamics, and may prove useful in long-term monitoring of productivity and hence management of boreal aquatic ecosystems.</p></abstract><funding-group><funding-statement>This work was supported by the National Sciences and Engineering Research Council HydroNet Research Network to GR and Memorial University of Newfoundland Graduate Studentship to RP. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.</funding-statement></funding-group><counts><fig-count count="5"></fig-count><table-count count="3"></table-count><page-count count="13"></page-count></counts><custom-meta-group><custom-meta id="data-availability"><meta-name>Data Availability</meta-name><meta-value>Data are available from Dryad under DOI:<ext-link ext-link-type="uri" xlink:href="http://dx.doi.org/10.5061/dryad.nt18c">10.5061/dryad.nt18c</ext-link>.</meta-value></custom-meta></custom-meta-group></article-meta><notes><title>Data Availability</title><p>Data are available from Dryad under DOI:<ext-link ext-link-type="uri" xlink:href="http://dx.doi.org/10.5061/dryad.nt18c">10.5061/dryad.nt18c</ext-link>.</p></notes></front></pmc><affiliations><list></list><tree><noCountry><name sortKey="Pollom, Riley A" sort="Pollom, Riley A" uniqKey="Pollom R" first="Riley A." last="Pollom">Riley A. Pollom</name><name sortKey="Rose, George A" sort="Rose, George A" uniqKey="Rose G" first="George A." last="Rose">George A. Rose</name></noCountry></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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