Dissolved oxygen, temperature and salinity effects on the ecophysiology and survival of juvenile Atlantic sturgeon in estuarine waters: I. Laboratory results
Identifieur interne : 000A33 ( Main/Merge ); précédent : 000A32; suivant : 000A34Dissolved oxygen, temperature and salinity effects on the ecophysiology and survival of juvenile Atlantic sturgeon in estuarine waters: I. Laboratory results
Auteurs : Edwin J. Niklitschek [Chili] ; David H. Secor [États-Unis]Source :
- Journal of experimental marine biology and ecology [ 0022-0981 ] ; 2009.
Descripteurs français
- Pascal (Inist)
- Wicri :
- topic : Estuaire, Milieu marin.
English descriptors
- KwdEn :
Abstract
Dissolved oxygen and salinity are relevant structuring factors which should be incorporated into habitat and bioenergetic models for estuarine fishes. We measured growth, food consumption, routine and postprandial metabolism, egestion and survival responses of juvenile Atlantic sturgeon (young-of-the-year: YOY, 6-48 g) in an incomplete factorial array of temperature, salinity and dissolved oxygen levels. Complementary measures were also conducted on yearlings (1 year-old, 70-300 g) to evaluate size and age effects upon food consumption and growth. All three factors had a significant effect on major bioenergetic responses, as well as several of their first order interactions. Maximum growth and food consumption rates were observed above 70% dissolved oxygen saturation, at 20 °C, and between salinities of 8 and 15. Postprandial metabolism was reduced and egestion increased under hypoxia (50% DO saturation), suggesting compensatory mechanisms aimed to reduce assimilation rates. A significant shift in growth responses with age indicated higher tolerance to salinity in yearlings than in YOY. No other size dependent changes were significant, either for hypoxia or for temperature effects. Survival tended to increase with dissolved oxygen saturation, and decreased at the highest temperature and salinity levels. Our results indicated both additive and synergistic effects of tested environmental factors upon ecophysiological responses and highlighted the need to consider these in new bioenergetic models.
Links toward previous steps (curation, corpus...)
- to stream PascalFrancis, to step Corpus: 000119
- to stream PascalFrancis, to step Curation: 000256
- to stream PascalFrancis, to step Checkpoint: 000136
Links to Exploration step
Pascal:10-0053981Le document en format XML
<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en" level="a">Dissolved oxygen, temperature and salinity effects on the ecophysiology and survival of juvenile Atlantic sturgeon in estuarine waters: I. Laboratory results</title><author><name sortKey="Niklitschek, Edwin J" sort="Niklitschek, Edwin J" uniqKey="Niklitschek E" first="Edwin J." last="Niklitschek">Edwin J. Niklitschek</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Universidad Austral de Chile, Centro Trapananda. Portales 73, Coyhaique</s1><s2>CP 5950000, Region of Aysen</s2><s3>CHL</s3><sZ>1 aut.</sZ></inist:fA14><country>Chili</country><wicri:noRegion>CP 5950000, Region of Aysen</wicri:noRegion></affiliation></author><author><name sortKey="Secor, David H" sort="Secor, David H" uniqKey="Secor D" first="David H." last="Secor">David H. Secor</name><affiliation wicri:level="2"><inist:fA14 i1="02"><s1>University of Maryland Center for Environmental Science, Chesapeake Biological Laboratory, 1 Williams Street, P.O. Box 38</s1><s2>Solomons, MD 20688</s2><s3>USA</s3><sZ>2 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><region type="state">Maryland</region></placeName></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">INIST</idno><idno type="inist">10-0053981</idno><date when="2009">2009</date><idno type="stanalyst">PASCAL 10-0053981 INIST</idno><idno type="RBID">Pascal:10-0053981</idno><idno type="wicri:Area/PascalFrancis/Corpus">000119</idno><idno type="wicri:Area/PascalFrancis/Curation">000256</idno><idno type="wicri:Area/PascalFrancis/Checkpoint">000136</idno><idno type="wicri:explorRef" wicri:stream="PascalFrancis" wicri:step="Checkpoint">000136</idno><idno type="wicri:doubleKey">0022-0981:2009:Niklitschek E:dissolved:oxygen:temperature</idno><idno type="wicri:Area/Main/Merge">000A33</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Dissolved oxygen, temperature and salinity effects on the ecophysiology and survival of juvenile Atlantic sturgeon in estuarine waters: I. Laboratory results</title><author><name sortKey="Niklitschek, Edwin J" sort="Niklitschek, Edwin J" uniqKey="Niklitschek E" first="Edwin J." last="Niklitschek">Edwin J. Niklitschek</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Universidad Austral de Chile, Centro Trapananda. Portales 73, Coyhaique</s1><s2>CP 5950000, Region of Aysen</s2><s3>CHL</s3><sZ>1 aut.</sZ></inist:fA14><country>Chili</country><wicri:noRegion>CP 5950000, Region of Aysen</wicri:noRegion></affiliation></author><author><name sortKey="Secor, David H" sort="Secor, David H" uniqKey="Secor D" first="David H." last="Secor">David H. Secor</name><affiliation wicri:level="2"><inist:fA14 i1="02"><s1>University of Maryland Center for Environmental Science, Chesapeake Biological Laboratory, 1 Williams Street, P.O. Box 38</s1><s2>Solomons, MD 20688</s2><s3>USA</s3><sZ>2 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><region type="state">Maryland</region></placeName></affiliation></author></analytic><series><title level="j" type="main">Journal of experimental marine biology and ecology</title><title level="j" type="abbreviated">J. exp. mar. biol. ecol.</title><idno type="ISSN">0022-0981</idno><imprint><date when="2009">2009</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Journal of experimental marine biology and ecology</title><title level="j" type="abbreviated">J. exp. mar. biol. ecol.</title><idno type="ISSN">0022-0981</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Acipenser sturio</term><term>Dissolved oxygen</term><term>Ecophysiology</term><term>Estuaries</term><term>Laboratory</term><term>Laboratory study</term><term>Marine environment</term><term>Salinity</term><term>Survival</term><term>Temperature effect</term><term>Young animal</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Oxygène dissous</term><term>Effet température</term><term>Salinité</term><term>Ecophysiologie</term><term>Survie</term><term>Animal jeune</term><term>Estuaire</term><term>Laboratoire</term><term>Etude en laboratoire</term><term>Milieu marin</term><term>Acipenser sturio</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Estuaire</term><term>Milieu marin</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Dissolved oxygen and salinity are relevant structuring factors which should be incorporated into habitat and bioenergetic models for estuarine fishes. We measured growth, food consumption, routine and postprandial metabolism, egestion and survival responses of juvenile Atlantic sturgeon (young-of-the-year: YOY, 6-48 g) in an incomplete factorial array of temperature, salinity and dissolved oxygen levels. Complementary measures were also conducted on yearlings (1 year-old, 70-300 g) to evaluate size and age effects upon food consumption and growth. All three factors had a significant effect on major bioenergetic responses, as well as several of their first order interactions. Maximum growth and food consumption rates were observed above 70% dissolved oxygen saturation, at 20 °C, and between salinities of 8 and 15. Postprandial metabolism was reduced and egestion increased under hypoxia (50% DO saturation), suggesting compensatory mechanisms aimed to reduce assimilation rates. A significant shift in growth responses with age indicated higher tolerance to salinity in yearlings than in YOY. No other size dependent changes were significant, either for hypoxia or for temperature effects. Survival tended to increase with dissolved oxygen saturation, and decreased at the highest temperature and salinity levels. Our results indicated both additive and synergistic effects of tested environmental factors upon ecophysiological responses and highlighted the need to consider these in new bioenergetic models.</div></front></TEI><affiliations><list><country><li>Chili</li><li>États-Unis</li></country><region><li>Maryland</li></region></list><tree><country name="Chili"><noRegion><name sortKey="Niklitschek, Edwin J" sort="Niklitschek, Edwin J" uniqKey="Niklitschek E" first="Edwin J." last="Niklitschek">Edwin J. Niklitschek</name></noRegion></country><country name="États-Unis"><region name="Maryland"><name sortKey="Secor, David H" sort="Secor, David H" uniqKey="Secor D" first="David H." last="Secor">David H. Secor</name></region></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
EXPLOR_STEP=$WICRI_ROOT/Wicri/Eau/explor/EsturgeonV1/Data/Main/Merge
HfdSelect -h $EXPLOR_STEP/biblio.hfd -nk 000A33 | SxmlIndent | more
Ou
HfdSelect -h $EXPLOR_AREA/Data/Main/Merge/biblio.hfd -nk 000A33 | SxmlIndent | more
Pour mettre un lien sur cette page dans le réseau Wicri
{{Explor lien
|wiki= Wicri/Eau
|area= EsturgeonV1
|flux= Main
|étape= Merge
|type= RBID
|clé= Pascal:10-0053981
|texte= Dissolved oxygen, temperature and salinity effects on the ecophysiology and survival of juvenile Atlantic sturgeon in estuarine waters: I. Laboratory results
}}
| This area was generated with Dilib version V0.6.27. |  |