Relating the swimming movements of green sturgeon to the movement of water currents
Identifieur interne : 000057 ( PascalFrancis/Checkpoint ); précédent : 000056; suivant : 000058Relating the swimming movements of green sturgeon to the movement of water currents
Auteurs : John T. Kelly [États-Unis] ; A. Peter Klimley [États-Unis]Source :
- Environmental biology of fishes [ 0378-1909 ] ; 2012.
Descripteurs français
- Pascal (Inist)
English descriptors
Abstract
Animals swimming in tidal environments continuously interact with water currents which may either hinder or aid their movement. It is difficult to observe the orientation of an organism relative to the current when it is swimming in the wild without specialized telemetry; however, using the total recorded movement vector and the current vector, one can use vector analysis to calculate the actual movement of the animal. Here, we apply this method to six tracks of green sturgeon (Acipenser medirostris) in the San Francisco Estuary, using current vectors derived from a hydrodynamic model. Three movements were near the surface in deeper, high-current regions of the bay and three were near the bottom in shallow, low-current areas. The total displacement over ground was faster at the surface (0.9 m sec-1 versus 0.5 m sec-1) and occurred in stronger currents (0.7 m sec-1 versus 0.4 m sec-1), but the swimming speeds of the fish were similar between surface and bottom movements (0.5 m sec ' versus 0.6 m sec-1). All surface movements were in the direction of the current, and two of the fish also oriented closely to the flow. In contrast, none of the three benthic movements were in the direction of the current, and two were oriented opposite to the flow. It seems plausible that green sturgeon orient to and make use of water currents to efficiently move through tidal habitats, riding the flow in high-current areas, and moving independently of, or even into, the flow in slower currents.
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Peter Klimley</name><affiliation wicri:level="2"><inist:fA14 i1="01"><s1>Department of Wildlife, Fish and Conservation Biology, University of California, Davis, One Shields Avenue</s1><s2>Davis, CA 95616</s2><s3>USA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><region type="state">Californie</region></placeName></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">INIST</idno><idno type="inist">12-0134648</idno><date when="2012">2012</date><idno type="stanalyst">PASCAL 12-0134648 INIST</idno><idno type="RBID">Pascal:12-0134648</idno><idno type="wicri:Area/PascalFrancis/Corpus">000069</idno><idno type="wicri:Area/PascalFrancis/Curation">000305</idno><idno type="wicri:Area/PascalFrancis/Checkpoint">000057</idno><idno type="wicri:explorRef" wicri:stream="PascalFrancis" wicri:step="Checkpoint">000057</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Relating the swimming movements of green sturgeon to the movement of water currents</title><author><name sortKey="Kelly, John T" sort="Kelly, John T" uniqKey="Kelly J" first="John T." last="Kelly">John T. Kelly</name><affiliation wicri:level="2"><inist:fA14 i1="01"><s1>Department of Wildlife, Fish and Conservation Biology, University of California, Davis, One Shields Avenue</s1><s2>Davis, CA 95616</s2><s3>USA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><region type="state">Californie</region></placeName></affiliation></author><author><name sortKey="Peter Klimley, A" sort="Peter Klimley, A" uniqKey="Peter Klimley A" first="A." last="Peter Klimley">A. 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It is difficult to observe the orientation of an organism relative to the current when it is swimming in the wild without specialized telemetry; however, using the total recorded movement vector and the current vector, one can use vector analysis to calculate the actual movement of the animal. Here, we apply this method to six tracks of green sturgeon (Acipenser medirostris) in the San Francisco Estuary, using current vectors derived from a hydrodynamic model. Three movements were near the surface in deeper, high-current regions of the bay and three were near the bottom in shallow, low-current areas. The total displacement over ground was faster at the surface (0.9 m sec<sup>-1 </sup> versus 0.5 m sec<sup>-1</sup>) and occurred in stronger currents (0.7 m sec<sup>-1</sup> versus 0.4 m sec<sup>-1</sup>), but the swimming speeds of the fish were similar between surface and bottom movements (0.5 m sec ' versus 0.6 m sec<sup>-1</sup>). All surface movements were in the direction of the current, and two of the fish also oriented closely to the flow. In contrast, none of the three benthic movements were in the direction of the current, and two were oriented opposite to the flow. It seems plausible that green sturgeon orient to and make use of water currents to efficiently move through tidal habitats, riding the flow in high-current areas, and moving independently of, or even into, the flow in slower currents.</div></front></TEI><inist><standard h6="B"><pA><fA01 i1="01" i2="1"><s0>0378-1909</s0></fA01><fA02 i1="01"><s0>EBFID3</s0></fA02><fA03 i2="1"><s0>Environ. biol. fishes</s0></fA03><fA05><s2>93</s2></fA05><fA06><s2>2</s2></fA06><fA08 i1="01" i2="1" l="ENG"><s1>Relating the swimming movements of green sturgeon to the movement of water currents</s1></fA08><fA11 i1="01" i2="1"><s1>KELLY (John T.)</s1></fA11><fA11 i1="02" i2="1"><s1>PETER KLIMLEY (A.)</s1></fA11><fA14 i1="01"><s1>Department of Wildlife, Fish and Conservation Biology, University of California, Davis, One Shields Avenue</s1><s2>Davis, CA 95616</s2><s3>USA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ></fA14><fA20><s1>151-167</s1></fA20><fA21><s1>2012</s1></fA21><fA23 i1="01"><s0>ENG</s0></fA23><fA43 i1="01"><s1>INIST</s1><s2>17564</s2><s5>354000502852130010</s5></fA43><fA44><s0>0000</s0><s1>© 2012 INIST-CNRS. 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Three movements were near the surface in deeper, high-current regions of the bay and three were near the bottom in shallow, low-current areas. The total displacement over ground was faster at the surface (0.9 m sec<sup>-1 </sup> versus 0.5 m sec<sup>-1</sup>) and occurred in stronger currents (0.7 m sec<sup>-1</sup> versus 0.4 m sec<sup>-1</sup>), but the swimming speeds of the fish were similar between surface and bottom movements (0.5 m sec ' versus 0.6 m sec<sup>-1</sup>). All surface movements were in the direction of the current, and two of the fish also oriented closely to the flow. In contrast, none of the three benthic movements were in the direction of the current, and two were oriented opposite to the flow. 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Kelly</name></region><name sortKey="Peter Klimley, A" sort="Peter Klimley, A" uniqKey="Peter Klimley A" first="A." last="Peter Klimley">A. Peter Klimley</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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