Endocrine changes associated with spawning behavior and social stimuli in a wild population of rainbow trout ( Salmo gairdneri )
Identifieur interne : 000890 ( Main/Exploration ); précédent : 000889; suivant : 000891Endocrine changes associated with spawning behavior and social stimuli in a wild population of rainbow trout ( Salmo gairdneri )
Auteurs : N. R. Liley [Canada] ; A. Fostier [France] ; B. Breton [France] ; E. S. P. Tan [Malaisie]Source :
- General and Comparative Endocrinology [ 0016-6480 ] ; 1986.
Abstract
Rainbow trout (Salmo gairdneri) were collected from a natural spawning population at Pennask Lake, B.C. Blood samples taken from female trout at different stages of spawning were assayed by radioimmoassay for gonadotropin (GtH), estradiol-17β (E2), androgens, including testosterone (T), and 17α-hydroxy-20β-dihydroprogesterone (17,20-P). Plasma levels of androgen and estradiol were highest in females sampled shortly before ovulation (“green” females) and declined in ovulated and sexually active females, reaching lowest levels in postspawning fish. Concentrations of 17,20-P rose markedly in ovulated females allowed to dig nests and interact with sexually active males. Plasma GtH levels were similar in green unovulated females and ovulated fish prevented from spawning, but showed a marked increase in actively nest building ovulated fish. The results demonstrate that social stimuli affect plasma levels of 17,20-P and perhaps GtH. The functional significance of the endocrine responses to social factors is not clear, but it is suggested that increased hormone levels may contribute to an acceleration or synchronization of breeding, or be responsible for causing and maintaining more vigorous sexual activity.
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DOI: 10.1016/0016-6480(86)90104-8
Affiliations:
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Tan</name></author></titleStmt><publicationStmt><idno type="wicri:source">ISTEX</idno><idno type="RBID">ISTEX:528A77554D82706709FA56782874987B90BA7040</idno><date when="1986" year="1986">1986</date><idno type="doi">10.1016/0016-6480(86)90104-8</idno><idno type="url">https://api.istex.fr/document/528A77554D82706709FA56782874987B90BA7040/fulltext/pdf</idno><idno type="wicri:Area/Istex/Corpus">000080</idno><idno type="wicri:Area/Istex/Curation">000080</idno><idno type="wicri:Area/Istex/Checkpoint">000580</idno><idno type="wicri:doubleKey">0016-6480:1986:Liley N:endocrine:changes:associated</idno><idno type="wicri:Area/Main/Merge">000916</idno><idno type="wicri:Area/Main/Curation">000890</idno><idno type="wicri:Area/Main/Exploration">000890</idno></publicationStmt><sourceDesc><biblStruct><analytic><title level="a">Endocrine changes associated with spawning behavior and social stimuli in a wild population of rainbow trout ( Salmo gairdneri )</title><author><name sortKey="Liley, N R" sort="Liley, N R" uniqKey="Liley N" first="N. R." last="Liley">N. R. Liley</name><affiliation wicri:level="1"><country xml:lang="fr">Canada</country><wicri:regionArea>Department of Zoology, University of British Columbia, Vancouver, B.C.</wicri:regionArea><wicri:noRegion>B.C.</wicri:noRegion></affiliation></author><author><name sortKey="Fostier, A" sort="Fostier, A" uniqKey="Fostier A" first="A." last="Fostier">A. Fostier</name><affiliation wicri:level="3"><country xml:lang="fr">France</country><wicri:regionArea>Laboratoire de Physiologie des Poissons INRA, Bat. no. A, Campus de Beaulieu, 35042 Rennes</wicri:regionArea><placeName><region type="region" nuts="2">Région Bretagne</region><settlement type="city">Rennes</settlement></placeName></affiliation></author><author><name sortKey="Breton, B" sort="Breton, B" uniqKey="Breton B" first="B." last="Breton">B. Breton</name><affiliation wicri:level="3"><country xml:lang="fr">France</country><wicri:regionArea>Laboratoire de Physiologie des Poissons INRA, Bat. no. 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Tan</name><affiliation wicri:level="1"><country xml:lang="fr">Malaisie</country><wicri:regionArea>School of Biological Sciences, Universiti Sains Malaysia, Penang</wicri:regionArea><wicri:noRegion>Penang</wicri:noRegion></affiliation></author></analytic><monogr></monogr><series><title level="j">General and Comparative Endocrinology</title><title level="j" type="abbrev">YGCEN</title><idno type="ISSN">0016-6480</idno><imprint><publisher>ELSEVIER</publisher><date type="published" when="1986">1986</date><biblScope unit="volume">62</biblScope><biblScope unit="issue">1</biblScope><biblScope unit="page" from="157">157</biblScope><biblScope unit="page" to="167">167</biblScope></imprint><idno type="ISSN">0016-6480</idno></series><idno type="istex">528A77554D82706709FA56782874987B90BA7040</idno><idno type="DOI">10.1016/0016-6480(86)90104-8</idno><idno type="PII">0016-6480(86)90104-8</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0016-6480</idno></seriesStmt></fileDesc><profileDesc><textClass></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Rainbow trout (Salmo gairdneri) were collected from a natural spawning population at Pennask Lake, B.C. Blood samples taken from female trout at different stages of spawning were assayed by radioimmoassay for gonadotropin (GtH), estradiol-17β (E2), androgens, including testosterone (T), and 17α-hydroxy-20β-dihydroprogesterone (17,20-P). Plasma levels of androgen and estradiol were highest in females sampled shortly before ovulation (“green” females) and declined in ovulated and sexually active females, reaching lowest levels in postspawning fish. Concentrations of 17,20-P rose markedly in ovulated females allowed to dig nests and interact with sexually active males. Plasma GtH levels were similar in green unovulated females and ovulated fish prevented from spawning, but showed a marked increase in actively nest building ovulated fish. The results demonstrate that social stimuli affect plasma levels of 17,20-P and perhaps GtH. The functional significance of the endocrine responses to social factors is not clear, but it is suggested that increased hormone levels may contribute to an acceleration or synchronization of breeding, or be responsible for causing and maintaining more vigorous sexual activity.</div></front></TEI><affiliations><list><country><li>Canada</li><li>France</li><li>Malaisie</li></country><region><li>Région Bretagne</li></region><settlement><li>Rennes</li></settlement></list><tree><country name="Canada"><noRegion><name sortKey="Liley, N R" sort="Liley, N R" uniqKey="Liley N" first="N. R." last="Liley">N. R. Liley</name></noRegion></country><country name="France"><region name="Région Bretagne"><name sortKey="Fostier, A" sort="Fostier, A" uniqKey="Fostier A" first="A." last="Fostier">A. Fostier</name></region><name sortKey="Breton, B" sort="Breton, B" uniqKey="Breton B" first="B." last="Breton">B. Breton</name></country><country name="Malaisie"><noRegion><name sortKey="Tan, E S P" sort="Tan, E S P" uniqKey="Tan E" first="E. S. P." last="Tan">E. S. P. Tan</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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