Effects of thermal regime on ovarian maturation and plasma sex steroids in farmed white sturgeon, Acipenser transmontanus
Identifieur interne : 001570 ( Main/Merge ); précédent : 001569; suivant : 001571Effects of thermal regime on ovarian maturation and plasma sex steroids in farmed white sturgeon, Acipenser transmontanus
Auteurs : Molly A. H. Webb [États-Unis] ; Joel P. Van Eenennaam [États-Unis] ; Grant W. Feist [États-Unis] ; Javier Linares-Casenave [États-Unis] ; Martin S. Fitzpatrick [États-Unis] ; Carl B. Schreck [États-Unis] ; Serge I. Doroshov A [États-Unis]Source :
- Aquaculture : (Amsterdam) [ 0044-8486 ] ; 2001.
Descripteurs français
- Pascal (Inist)
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- KwdEn :
Abstract
Recently, commercial aquaculture farms in Northern California have exposed gravid, cultured white sturgeon females to cold water (12 ± 1°C) throughout the late phase of vitellogenesis and ovarian follicle maturation resulting in improved ovulation rates and egg quality. However, the optimum timing for transfer of broodfish to the cold water and the capacity of transferred broodfish to maintain reproductive competence over an extended time in cold water had not been evaluated. Gravid white sturgeon females that have been raised at water temperatures of 16-20°C were transported to either cold water (12 ± 1°C; Group 1) in November 1997 or maintained in ambient water temperatures (10-19°C; Group 2) until early spring. In March 1998, half of the fish in Group 2 had regressed ovaries, but the remaining females had intact ovarian follicles and were transported to the cold water. Ovarian follicles and blood were collected from females until they reached the stage of spawning readiness (determined by germinal vesicle position and an oocyte maturation assay) or underwent ovarian regression. Exposure of gravid sturgeon females to ambient water temperatures (14.5 ± 2.3°C, mean ± S.D.) from October to March led to a decrease in plasma sex steroids and a high incidence of ovarian regression in fish with a more advanced stage of oocyte development. Transfer of females with intact ovarian follicles to cold water (12 ± 1°C) in the fall or early spring resulted in normal ovarian development in the majority of females. Holding females in cold water does not seem to override their endogenous reproductive rhythms but extends their capacity to maintain oocyte maturational competence over a longer period of time. A temperature-sensitive phase in ovarian development may occur during the transition from vitellogenic growth to oocyte maturation, and the degree and timing of sensitivity to environmental temperature are dependent on the female's endogenous reproductive rhythm.
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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en" level="a">Effects of thermal regime on ovarian maturation and plasma sex steroids in farmed white sturgeon, Acipenser transmontanus</title><author><name sortKey="Webb, Molly A H" sort="Webb, Molly A H" uniqKey="Webb M" first="Molly A. H." last="Webb">Molly A. H. Webb</name><affiliation wicri:level="2"><inist:fA14 i1="01"><s1>Department of Animal Science, One Shields Avenue, University of California</s1><s2>Davis, CA 95616</s2><s3>USA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>4 aut.</sZ><sZ>7 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><region type="state">Californie</region></placeName></affiliation></author><author><name sortKey="Van Eenennaam, Joel P" sort="Van Eenennaam, Joel P" uniqKey="Van Eenennaam J" first="Joel P." last="Van Eenennaam">Joel P. Van Eenennaam</name><affiliation wicri:level="2"><inist:fA14 i1="01"><s1>Department of Animal Science, One Shields Avenue, University of California</s1><s2>Davis, CA 95616</s2><s3>USA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>4 aut.</sZ><sZ>7 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><region type="state">Californie</region></placeName></affiliation></author><author><name sortKey="Feist, Grant W" sort="Feist, Grant W" uniqKey="Feist G" first="Grant W." last="Feist">Grant W. 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H." last="Webb">Molly A. H. Webb</name><affiliation wicri:level="2"><inist:fA14 i1="01"><s1>Department of Animal Science, One Shields Avenue, University of California</s1><s2>Davis, CA 95616</s2><s3>USA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>4 aut.</sZ><sZ>7 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><region type="state">Californie</region></placeName></affiliation></author><author><name sortKey="Van Eenennaam, Joel P" sort="Van Eenennaam, Joel P" uniqKey="Van Eenennaam J" first="Joel P." last="Van Eenennaam">Joel P. Van Eenennaam</name><affiliation wicri:level="2"><inist:fA14 i1="01"><s1>Department of Animal Science, One Shields Avenue, University of California</s1><s2>Davis, CA 95616</s2><s3>USA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>4 aut.</sZ><sZ>7 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><region type="state">Californie</region></placeName></affiliation></author><author><name sortKey="Feist, Grant W" sort="Feist, Grant W" uniqKey="Feist G" first="Grant W." last="Feist">Grant W. Feist</name><affiliation wicri:level="2"><inist:fA14 i1="02"><s1>Oregon Cooperative Fish and Wildlife Research Unit, Department of Fisheries and Wildlife, Oregon State University</s1><s2>Corvallis, OR 97331</s2><s3>USA</s3><sZ>3 aut.</sZ><sZ>5 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><region type="state">Oregon</region></placeName></affiliation></author><author><name sortKey="Linares Casenave, Javier" sort="Linares Casenave, Javier" uniqKey="Linares Casenave J" first="Javier" last="Linares-Casenave">Javier Linares-Casenave</name><affiliation wicri:level="2"><inist:fA14 i1="01"><s1>Department of Animal Science, One Shields Avenue, University of California</s1><s2>Davis, CA 95616</s2><s3>USA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>4 aut.</sZ><sZ>7 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><region type="state">Californie</region></placeName></affiliation></author><author><name sortKey="Fitzpatrick, Martin S" sort="Fitzpatrick, Martin S" uniqKey="Fitzpatrick M" first="Martin S." last="Fitzpatrick">Martin S. Fitzpatrick</name><affiliation wicri:level="2"><inist:fA14 i1="02"><s1>Oregon Cooperative Fish and Wildlife Research Unit, Department of Fisheries and Wildlife, Oregon State University</s1><s2>Corvallis, OR 97331</s2><s3>USA</s3><sZ>3 aut.</sZ><sZ>5 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><region type="state">Oregon</region></placeName></affiliation></author><author><name sortKey="Schreck, Carl B" sort="Schreck, Carl B" uniqKey="Schreck C" first="Carl B." last="Schreck">Carl B. Schreck</name><affiliation wicri:level="2"><inist:fA14 i1="03"><s1>Biological Resources Division, US Geological Survey, Oregon Cooperative Fish and Wildlife Research Unit, Department of Fisheries and Wildlife, Oregon State University</s1><s2>Corvallis, OR 97331</s2><s3>USA</s3><sZ>6 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><region type="state">Oregon</region></placeName></affiliation></author><author><name sortKey="A, Serge I Doroshov" sort="A, Serge I Doroshov" uniqKey="A S" first="Serge I. Doroshov" last="A">Serge I. Doroshov A</name><affiliation wicri:level="2"><inist:fA14 i1="01"><s1>Department of Animal Science, One Shields Avenue, University of California</s1><s2>Davis, CA 95616</s2><s3>USA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>4 aut.</sZ><sZ>7 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><region type="state">Californie</region></placeName></affiliation></author></analytic><series><title level="j" type="main">Aquaculture : (Amsterdam)</title><title level="j" type="abbreviated">Aquaculture : (Amst.)</title><idno type="ISSN">0044-8486</idno><imprint><date when="2001">2001</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Aquaculture : (Amsterdam)</title><title level="j" type="abbreviated">Aquaculture : (Amst.)</title><idno type="ISSN">0044-8486</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Acipenser transmontanus</term><term>Biological marker</term><term>Cold water</term><term>Development</term><term>Farming animal</term><term>Oocyte</term><term>Oocyte maturation</term><term>Ovary</term><term>Seasonal variation</term><term>Sex steroid hormone</term><term>Temperature</term><term>Timing</term><term>Transfer</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Variation saisonnière</term><term>Température</term><term>Timing</term><term>Transfert</term><term>Eau froide</term><term>Maturation oeuf</term><term>Ovocyte</term><term>Hormone stéroïde sexuelle</term><term>Marqueur biologique</term><term>Développement</term><term>Ovaire</term><term>Animal élevage</term><term>Acipenser transmontanus</term><term>Acipenseridae</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Recently, commercial aquaculture farms in Northern California have exposed gravid, cultured white sturgeon females to cold water (12 ± 1°C) throughout the late phase of vitellogenesis and ovarian follicle maturation resulting in improved ovulation rates and egg quality. However, the optimum timing for transfer of broodfish to the cold water and the capacity of transferred broodfish to maintain reproductive competence over an extended time in cold water had not been evaluated. Gravid white sturgeon females that have been raised at water temperatures of 16-20°C were transported to either cold water (12 ± 1°C; Group 1) in November 1997 or maintained in ambient water temperatures (10-19°C; Group 2) until early spring. In March 1998, half of the fish in Group 2 had regressed ovaries, but the remaining females had intact ovarian follicles and were transported to the cold water. Ovarian follicles and blood were collected from females until they reached the stage of spawning readiness (determined by germinal vesicle position and an oocyte maturation assay) or underwent ovarian regression. Exposure of gravid sturgeon females to ambient water temperatures (14.5 ± 2.3°C, mean ± S.D.) from October to March led to a decrease in plasma sex steroids and a high incidence of ovarian regression in fish with a more advanced stage of oocyte development. Transfer of females with intact ovarian follicles to cold water (12 ± 1°C) in the fall or early spring resulted in normal ovarian development in the majority of females. Holding females in cold water does not seem to override their endogenous reproductive rhythms but extends their capacity to maintain oocyte maturational competence over a longer period of time. A temperature-sensitive phase in ovarian development may occur during the transition from vitellogenic growth to oocyte maturation, and the degree and timing of sensitivity to environmental temperature are dependent on the female's endogenous reproductive rhythm.</div></front></TEI><affiliations><list><country><li>États-Unis</li></country><region><li>Californie</li><li>Oregon</li></region></list><tree><country name="États-Unis"><region name="Californie"><name sortKey="Webb, Molly A H" sort="Webb, Molly A H" uniqKey="Webb M" first="Molly A. H." last="Webb">Molly A. H. Webb</name></region><name sortKey="A, Serge I Doroshov" sort="A, Serge I Doroshov" uniqKey="A S" first="Serge I. Doroshov" last="A">Serge I. Doroshov A</name><name sortKey="Feist, Grant W" sort="Feist, Grant W" uniqKey="Feist G" first="Grant W." last="Feist">Grant W. Feist</name><name sortKey="Fitzpatrick, Martin S" sort="Fitzpatrick, Martin S" uniqKey="Fitzpatrick M" first="Martin S." last="Fitzpatrick">Martin S. Fitzpatrick</name><name sortKey="Linares Casenave, Javier" sort="Linares Casenave, Javier" uniqKey="Linares Casenave J" first="Javier" last="Linares-Casenave">Javier Linares-Casenave</name><name sortKey="Schreck, Carl B" sort="Schreck, Carl B" uniqKey="Schreck C" first="Carl B." last="Schreck">Carl B. Schreck</name><name sortKey="Van Eenennaam, Joel P" sort="Van Eenennaam, Joel P" uniqKey="Van Eenennaam J" first="Joel P." last="Van Eenennaam">Joel P. Van Eenennaam</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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