Preliminary observations on the effects of holding temperature on reproductive performance of female white sturgeon, Acipenser transmontanus Richardson
Identifieur interne : 001729 ( Main/Exploration ); précédent : 001728; suivant : 001730Preliminary observations on the effects of holding temperature on reproductive performance of female white sturgeon, Acipenser transmontanus Richardson
Auteurs : M. A. H. Webb [États-Unis] ; J. P. Van Eenennaam [États-Unis] ; S. I. Doroshov [États-Unis] ; G. P. Moberg [États-Unis]Source :
- Aquaculture : (Amsterdam) [ 0044-8486 ] ; 1999.
Descripteurs français
- Pascal (Inist)
- Wicri :
- topic : Fécondité.
English descriptors
- KwdEn :
Abstract
Commercial sturgeon farms in California have observed poor spawning performance and ovarian regression in fish maintained at constant 16-20°C water temperatures. The effects of the pre-spawning thermal regime on oocyte germinal vesicle migration (GVM). in vitro maturation (GVBD), plasma concentrations of reproductive hormones, and hormonally-induced ovulation in white sturgeon females were examined. Gravid females were exposed to three temperature e treatments (seasonal 10-15°C. constant 15°C, and constant 18°C), and ovulation was induced when females reached the responsive stage. While all females (n = 5 per treatment) in the seasonal temperature treatment ovulated and produced fertile eggs, oocyte development (GVM) and ovulation were inhibited in the constant temperature treatments, and follicular atresia ensued in three out of five females exposed to 18°C water temperature. Temperature treatment did not have a significant el'fect on plasma hormone concentrations throughout the pre-spawning and spawning periods, but plasma concentrations of androgens and oestradiol declined in females that experienced developmental arrest and atresia. The spawning results provided empirical evidence for the negative effects of elevated temperatures on ovulatory response and egg quality. The pre-spawning thermal regime appears to be an important environmental factor for normal ovarian development in cultured white sturgeon and should be considered in management of wild stocks reproducing in rivers with regulated water flows.
Affiliations:
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A. H." last="Webb">M. A. H. Webb</name><affiliation wicri:level="2"><inist:fA14 i1="01"><s1>Department of Animal Science, University of California, One Shields Avenue</s1><s2>Davis, CA 95616</s2><s3>USA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><region type="state">Californie</region></placeName></affiliation></author><author><name sortKey="Van Eenennaam, J P" sort="Van Eenennaam, J P" uniqKey="Van Eenennaam J" first="J. P." last="Van Eenennaam">J. P. Van Eenennaam</name><affiliation wicri:level="2"><inist:fA14 i1="01"><s1>Department of Animal Science, University of California, One Shields Avenue</s1><s2>Davis, CA 95616</s2><s3>USA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><region type="state">Californie</region></placeName></affiliation></author><author><name sortKey="Doroshov, S I" sort="Doroshov, S I" uniqKey="Doroshov S" first="S. I." last="Doroshov">S. I. Doroshov</name><affiliation wicri:level="2"><inist:fA14 i1="01"><s1>Department of Animal Science, University of California, One Shields Avenue</s1><s2>Davis, CA 95616</s2><s3>USA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><region type="state">Californie</region></placeName></affiliation></author><author><name sortKey="Moberg, G P" sort="Moberg, G P" uniqKey="Moberg G" first="G. P." last="Moberg">G. P. Moberg</name><affiliation wicri:level="2"><inist:fA14 i1="01"><s1>Department of Animal Science, University of California, One Shields Avenue</s1><s2>Davis, CA 95616</s2><s3>USA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 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="1999">1999</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>Fecundity</term><term>Female</term><term>Oocyte</term><term>Oocyte maturation</term><term>Ovulation</term><term>Sex steroid hormone</term><term>Temperature</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Température</term><term>Fécondité</term><term>Maturation oeuf</term><term>Ovocyte</term><term>Ovulation</term><term>Hormone stéroïde sexuelle</term><term>Femelle</term><term>Acipenser transmontanus</term><term>Acipenseridae</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Fécondité</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Commercial sturgeon farms in California have observed poor spawning performance and ovarian regression in fish maintained at constant 16-20°C water temperatures. The effects of the pre-spawning thermal regime on oocyte germinal vesicle migration (GVM). in vitro maturation (GVBD), plasma concentrations of reproductive hormones, and hormonally-induced ovulation in white sturgeon females were examined. Gravid females were exposed to three temperature e treatments (seasonal 10-15°C. constant 15°C, and constant 18°C), and ovulation was induced when females reached the responsive stage. While all females (n = 5 per treatment) in the seasonal temperature treatment ovulated and produced fertile eggs, oocyte development (GVM) and ovulation were inhibited in the constant temperature treatments, and follicular atresia ensued in three out of five females exposed to 18°C water temperature. Temperature treatment did not have a significant el'fect on plasma hormone concentrations throughout the pre-spawning and spawning periods, but plasma concentrations of androgens and oestradiol declined in females that experienced developmental arrest and atresia. The spawning results provided empirical evidence for the negative effects of elevated temperatures on ovulatory response and egg quality. The pre-spawning thermal regime appears to be an important environmental factor for normal ovarian development in cultured white sturgeon and should be considered in management of wild stocks reproducing in rivers with regulated water flows.</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="Webb, M A H" sort="Webb, M A H" uniqKey="Webb M" first="M. A. H." last="Webb">M. A. H. Webb</name></region><name sortKey="Doroshov, S I" sort="Doroshov, S I" uniqKey="Doroshov S" first="S. I." last="Doroshov">S. I. Doroshov</name><name sortKey="Moberg, G P" sort="Moberg, G P" uniqKey="Moberg G" first="G. P." last="Moberg">G. P. Moberg</name><name sortKey="Van Eenennaam, J P" sort="Van Eenennaam, J P" uniqKey="Van Eenennaam J" first="J. P." last="Van Eenennaam">J. P. Van Eenennaam</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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