Unscreened water-diversion pipes pose an entrainment risk to the threatened green sturgeon, Acipenser medirostris.
Identifieur interne : 000157 ( Main/Exploration ); précédent : 000156; suivant : 000158Unscreened water-diversion pipes pose an entrainment risk to the threatened green sturgeon, Acipenser medirostris.
Auteurs : Timothy D. Mussen [États-Unis] ; Dennis Cocherell [États-Unis] ; Jamilynn B. Poletto [États-Unis] ; Jon S. Reardon [États-Unis] ; Zachary Hockett [États-Unis] ; Ali Ercan [États-Unis] ; Hossein Bandeh [États-Unis] ; M Levent Kavvas [États-Unis] ; Joseph J. Cech [États-Unis] ; Nann A. Fangue [États-Unis]Source :
- PloS one [ 1932-6203 ] ; 2014.
English descriptors
- KwdEn :
- MESH :
- geographic : California.
- physiology : Fishes.
- Agricultural Irrigation, Animals, Endangered Species, Female, Male, Rivers, Swimming.
Abstract
Over 3,300 unscreened agricultural water diversion pipes line the levees and riverbanks of the Sacramento River (California) watershed, where the threatened Southern Distinct Population Segment of green sturgeon, Acipenser medirostris, spawn. The number of sturgeon drawn into (entrained) and killed by these pipes is greatly unknown. We examined avoidance behaviors and entrainment susceptibility of juvenile green sturgeon (35±0.6 cm mean fork length) to entrainment in a large (>500-kl) outdoor flume with a 0.46-m-diameter water-diversion pipe. Fish entrainment was generally high (range: 26-61%), likely due to a lack of avoidance behavior prior to entering inescapable inflow conditions. We estimated that up to 52% of green sturgeon could be entrained after passing within 1.5 m of an active water-diversion pipe three times. These data suggest that green sturgeon are vulnerable to unscreened water-diversion pipes, and that additional research is needed to determine the potential impacts of entrainment mortality on declining sturgeon populations. Data under various hydraulic conditions also suggest that entrainment-related mortality could be decreased by extracting water at lower diversion rates over longer periods of time, balancing agricultural needs with green sturgeon conservation.
DOI: 10.1371/journal.pone.0086321
PubMed: 24454967
Affiliations:
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Poletto</name><affiliation wicri:level="2"><nlm:affiliation>Wildlife, Fish, and Conservation Biology Department, University of California Davis, Davis, California, United States of America.</nlm:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>Wildlife, Fish, and Conservation Biology Department, University of California Davis, Davis, California</wicri:regionArea><placeName><region type="state">Californie</region></placeName></affiliation></author><author><name sortKey="Reardon, Jon S" sort="Reardon, Jon S" uniqKey="Reardon J" first="Jon S" last="Reardon">Jon S. 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Cech</name><affiliation wicri:level="2"><nlm:affiliation>Wildlife, Fish, and Conservation Biology Department, University of California Davis, Davis, California, United States of America.</nlm:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>Wildlife, Fish, and Conservation Biology Department, University of California Davis, Davis, California</wicri:regionArea><placeName><region type="state">Californie</region></placeName></affiliation></author><author><name sortKey="Fangue, Nann A" sort="Fangue, Nann A" uniqKey="Fangue N" first="Nann A" last="Fangue">Nann A. Fangue</name><affiliation wicri:level="2"><nlm:affiliation>Wildlife, Fish, and Conservation Biology Department, University of California Davis, Davis, California, United States of America.</nlm:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>Wildlife, Fish, and Conservation Biology Department, University of California Davis, Davis, California</wicri:regionArea><placeName><region type="state">Californie</region></placeName></affiliation></author></analytic><series><title level="j">PloS one</title><idno type="eISSN">1932-6203</idno><imprint><date when="2014" type="published">2014</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Agricultural Irrigation</term><term>Animals</term><term>California</term><term>Endangered Species</term><term>Female</term><term>Fishes (physiology)</term><term>Male</term><term>Rivers</term><term>Swimming</term></keywords><keywords scheme="MESH" type="geographic" xml:lang="en"><term>California</term></keywords><keywords scheme="MESH" qualifier="physiology" xml:lang="en"><term>Fishes</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Agricultural Irrigation</term><term>Animals</term><term>Endangered Species</term><term>Female</term><term>Male</term><term>Rivers</term><term>Swimming</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Over 3,300 unscreened agricultural water diversion pipes line the levees and riverbanks of the Sacramento River (California) watershed, where the threatened Southern Distinct Population Segment of green sturgeon, Acipenser medirostris, spawn. The number of sturgeon drawn into (entrained) and killed by these pipes is greatly unknown. We examined avoidance behaviors and entrainment susceptibility of juvenile green sturgeon (35±0.6 cm mean fork length) to entrainment in a large (>500-kl) outdoor flume with a 0.46-m-diameter water-diversion pipe. Fish entrainment was generally high (range: 26-61%), likely due to a lack of avoidance behavior prior to entering inescapable inflow conditions. We estimated that up to 52% of green sturgeon could be entrained after passing within 1.5 m of an active water-diversion pipe three times. These data suggest that green sturgeon are vulnerable to unscreened water-diversion pipes, and that additional research is needed to determine the potential impacts of entrainment mortality on declining sturgeon populations. Data under various hydraulic conditions also suggest that entrainment-related mortality could be decreased by extracting water at lower diversion rates over longer periods of time, balancing agricultural needs with green sturgeon conservation.</div></front></TEI><affiliations><list><country><li>États-Unis</li></country><region><li>Californie</li></region></list><tree><country name="États-Unis"><region name="Californie"><name sortKey="Mussen, Timothy D" sort="Mussen, Timothy D" uniqKey="Mussen T" first="Timothy D" last="Mussen">Timothy D. Mussen</name></region><name sortKey="Bandeh, Hossein" sort="Bandeh, Hossein" uniqKey="Bandeh H" first="Hossein" last="Bandeh">Hossein Bandeh</name><name sortKey="Cech, Joseph J" sort="Cech, Joseph J" uniqKey="Cech J" first="Joseph J" last="Cech">Joseph J. Cech</name><name sortKey="Cocherell, Dennis" sort="Cocherell, Dennis" uniqKey="Cocherell D" first="Dennis" last="Cocherell">Dennis Cocherell</name><name sortKey="Ercan, Ali" sort="Ercan, Ali" uniqKey="Ercan A" first="Ali" last="Ercan">Ali Ercan</name><name sortKey="Fangue, Nann A" sort="Fangue, Nann A" uniqKey="Fangue N" first="Nann A" last="Fangue">Nann A. Fangue</name><name sortKey="Hockett, Zachary" sort="Hockett, Zachary" uniqKey="Hockett Z" first="Zachary" last="Hockett">Zachary Hockett</name><name sortKey="Kavvas, M Levent" sort="Kavvas, M Levent" uniqKey="Kavvas M" first="M Levent" last="Kavvas">M Levent Kavvas</name><name sortKey="Poletto, Jamilynn B" sort="Poletto, Jamilynn B" uniqKey="Poletto J" first="Jamilynn B" last="Poletto">Jamilynn B. Poletto</name><name sortKey="Reardon, Jon S" sort="Reardon, Jon S" uniqKey="Reardon J" first="Jon S" last="Reardon">Jon S. Reardon</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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