Changes in plasma levels of reproductive hormones during first sexual maturation in European male sea bass ( Dicentrarchus labrax L.) under artificial day lengths
Identifieur interne : 001421 ( Main/Exploration ); précédent : 001420; suivant : 001422Changes in plasma levels of reproductive hormones during first sexual maturation in European male sea bass ( Dicentrarchus labrax L.) under artificial day lengths
Auteurs : Lucinda Rodr Guez [Espagne] ; Ideal Begtashi [Espagne] ; Silvia Zanuy [Espagne] ; M Nica Shaw [Espagne] ; Manuel Carrillo [Espagne]Source :
- Aquaculture [ 0044-8486 ] ; 2001.
Abstract
Photoperiod has been considered one of the most important factors triggering puberty, as well as reproduction, in several fish species, including sea bass (Dicentrarchus labrax L.). In the present work, the effect of expanded (EX) and compressed (CO) photoperiods on plasma levels of reproductive hormones (gonadotropin-2 (GTH-2), testosterone (T) and 11-ketotestosterone (11-KT)) and gonadal maturation (spermiation time and gonadosomatic index (GSI)) were investigated in male sea bass during the first sexual maturation (October to April). Spermiation in controls was apparent from December to February–March. In EX and CO groups, spermiation was advanced by 2 months, although the CO group displayed a bimodal pattern, and testicular growth in both experimental groups was significantly reduced with respect to the controls. Plasma GTH-2 levels in controls showed the highest value (∼30 ng/ml) in the middle of the spermiation period, while EX group displayed the maximum level 4 months earlier (35±2.7 ng/ml) than controls. The CO group presented two peaks, the first of which (15.16±5.20 ng/ml) was advanced by 3 months with respect to the control peak. T and 11-KT levels in the control displayed the highest values during the spermiation period. The EX group showed lower T levels than controls, but both peaked at the same time. However, 11-KT levels remained low and unchanged. The CO group displayed two significant increases in T levels accordingly with the spermiation pattern, while the 11-KT profile only exhibited a significant increase 2 months earlier than in controls. Results obtained indicated an involvement of GTH-2 in gonadal maturation. In addition, T is suggested to be involved in the activation of the brain–pituitary–gonad (BPG) axis during pubertal development, while 11-KT may act by stimulating spermatogenesis and/or spermiation in juvenile male sea bass. Furthermore, the profiles of these reproductive hormones were altered by both expanded and compressed photoperiods, and first sexual maturation was advanced by at least 2 months.
Url:
DOI: 10.1016/S0044-8486(01)00774-8
Affiliations:
Links toward previous steps (curation, corpus...)
- to stream Istex, to step Corpus: 001014
- to stream Istex, to step Curation: 001012
- to stream Istex, to step Checkpoint: 000B79
- to stream Main, to step Merge: 001485
- to stream Main, to step Curation: 001421
Le document en format XML
<record><TEI wicri:istexFullTextTei="biblStruct"><teiHeader><fileDesc><titleStmt><title>Changes in plasma levels of reproductive hormones during first sexual maturation in European male sea bass ( Dicentrarchus labrax L.) under artificial day lengths</title>
<author><name sortKey="Rodr Guez, Lucinda" sort="Rodr Guez, Lucinda" uniqKey="Rodr Guez L" first="Lucinda" last="Rodr Guez">Lucinda Rodr Guez</name>
</author>
<author><name sortKey="Begtashi, Ideal" sort="Begtashi, Ideal" uniqKey="Begtashi I" first="Ideal" last="Begtashi">Ideal Begtashi</name>
</author>
<author><name sortKey="Zanuy, Silvia" sort="Zanuy, Silvia" uniqKey="Zanuy S" first="Silvia" last="Zanuy">Silvia Zanuy</name>
</author>
<author><name sortKey="Shaw, M Nica" sort="Shaw, M Nica" uniqKey="Shaw M" first="M Nica" last="Shaw">M Nica Shaw</name>
</author>
<author><name sortKey="Carrillo, Manuel" sort="Carrillo, Manuel" uniqKey="Carrillo M" first="Manuel" last="Carrillo">Manuel Carrillo</name>
</author>
</titleStmt>
<publicationStmt><idno type="wicri:source">ISTEX</idno>
<idno type="RBID">ISTEX:EAD3DD39EBD4340D1774A862250BB6DC83D16BC0</idno>
<date when="2001" year="2001">2001</date>
<idno type="doi">10.1016/S0044-8486(01)00774-8</idno>
<idno type="url">https://api.istex.fr/document/EAD3DD39EBD4340D1774A862250BB6DC83D16BC0/fulltext/pdf</idno>
<idno type="wicri:Area/Istex/Corpus">001014</idno>
<idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Corpus" wicri:corpus="ISTEX">001014</idno>
<idno type="wicri:Area/Istex/Curation">001012</idno>
<idno type="wicri:Area/Istex/Checkpoint">000B79</idno>
<idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Checkpoint">000B79</idno>
<idno type="wicri:doubleKey">0044-8486:2001:Rodr Guez L:changes:in:plasma</idno>
<idno type="wicri:Area/Main/Merge">001485</idno>
<idno type="wicri:Area/Main/Curation">001421</idno>
<idno type="wicri:Area/Main/Exploration">001421</idno>
</publicationStmt>
<sourceDesc><biblStruct><analytic><title level="a">Changes in plasma levels of reproductive hormones during first sexual maturation in European male sea bass ( Dicentrarchus labrax L.) under artificial day lengths</title>
<author><name sortKey="Rodr Guez, Lucinda" sort="Rodr Guez, Lucinda" uniqKey="Rodr Guez L" first="Lucinda" last="Rodr Guez">Lucinda Rodr Guez</name>
<affiliation wicri:level="1"><country xml:lang="fr">Espagne</country>
<wicri:regionArea>Consejo Superior de Investigaciones Cientı́ficas (CSIC), Instituto de Acuicultura de Torre la Sal, 12595 Ribera de Cabanes, Castellón</wicri:regionArea>
<wicri:noRegion>Castellón</wicri:noRegion>
</affiliation>
</author>
<author><name sortKey="Begtashi, Ideal" sort="Begtashi, Ideal" uniqKey="Begtashi I" first="Ideal" last="Begtashi">Ideal Begtashi</name>
<affiliation wicri:level="1"><country xml:lang="fr">Espagne</country>
<wicri:regionArea>Consejo Superior de Investigaciones Cientı́ficas (CSIC), Instituto de Acuicultura de Torre la Sal, 12595 Ribera de Cabanes, Castellón</wicri:regionArea>
<wicri:noRegion>Castellón</wicri:noRegion>
</affiliation>
</author>
<author><name sortKey="Zanuy, Silvia" sort="Zanuy, Silvia" uniqKey="Zanuy S" first="Silvia" last="Zanuy">Silvia Zanuy</name>
<affiliation wicri:level="1"><country xml:lang="fr">Espagne</country>
<wicri:regionArea>Consejo Superior de Investigaciones Cientı́ficas (CSIC), Instituto de Acuicultura de Torre la Sal, 12595 Ribera de Cabanes, Castellón</wicri:regionArea>
<wicri:noRegion>Castellón</wicri:noRegion>
</affiliation>
</author>
<author><name sortKey="Shaw, M Nica" sort="Shaw, M Nica" uniqKey="Shaw M" first="M Nica" last="Shaw">M Nica Shaw</name>
<affiliation wicri:level="1"><country xml:lang="fr">Espagne</country>
<wicri:regionArea>Consejo Superior de Investigaciones Cientı́ficas (CSIC), Instituto de Acuicultura de Torre la Sal, 12595 Ribera de Cabanes, Castellón</wicri:regionArea>
<wicri:noRegion>Castellón</wicri:noRegion>
</affiliation>
</author>
<author><name sortKey="Carrillo, Manuel" sort="Carrillo, Manuel" uniqKey="Carrillo M" first="Manuel" last="Carrillo">Manuel Carrillo</name>
<affiliation wicri:level="1"><country xml:lang="fr">Espagne</country>
<wicri:regionArea>Consejo Superior de Investigaciones Cientı́ficas (CSIC), Instituto de Acuicultura de Torre la Sal, 12595 Ribera de Cabanes, Castellón</wicri:regionArea>
<wicri:noRegion>Castellón</wicri:noRegion>
</affiliation>
<affiliation wicri:level="1"><country wicri:rule="url">Espagne</country>
</affiliation>
</author>
</analytic>
<monogr></monogr>
<series><title level="j">Aquaculture</title>
<title level="j" type="abbrev">AQUA</title>
<idno type="ISSN">0044-8486</idno>
<imprint><publisher>ELSEVIER</publisher>
<date type="published" when="2001">2001</date>
<biblScope unit="volume">202</biblScope>
<biblScope unit="issue">3–4</biblScope>
<biblScope unit="page" from="235">235</biblScope>
<biblScope unit="page" to="248">248</biblScope>
</imprint>
<idno type="ISSN">0044-8486</idno>
</series>
<idno type="istex">EAD3DD39EBD4340D1774A862250BB6DC83D16BC0</idno>
<idno type="DOI">10.1016/S0044-8486(01)00774-8</idno>
<idno type="PII">S0044-8486(01)00774-8</idno>
</biblStruct>
</sourceDesc>
<seriesStmt><idno type="ISSN">0044-8486</idno>
</seriesStmt>
</fileDesc>
<profileDesc><textClass></textClass>
<langUsage><language ident="en">en</language>
</langUsage>
</profileDesc>
</teiHeader>
<front><div type="abstract" xml:lang="en">Photoperiod has been considered one of the most important factors triggering puberty, as well as reproduction, in several fish species, including sea bass (Dicentrarchus labrax L.). In the present work, the effect of expanded (EX) and compressed (CO) photoperiods on plasma levels of reproductive hormones (gonadotropin-2 (GTH-2), testosterone (T) and 11-ketotestosterone (11-KT)) and gonadal maturation (spermiation time and gonadosomatic index (GSI)) were investigated in male sea bass during the first sexual maturation (October to April). Spermiation in controls was apparent from December to February–March. In EX and CO groups, spermiation was advanced by 2 months, although the CO group displayed a bimodal pattern, and testicular growth in both experimental groups was significantly reduced with respect to the controls. Plasma GTH-2 levels in controls showed the highest value (∼30 ng/ml) in the middle of the spermiation period, while EX group displayed the maximum level 4 months earlier (35±2.7 ng/ml) than controls. The CO group presented two peaks, the first of which (15.16±5.20 ng/ml) was advanced by 3 months with respect to the control peak. T and 11-KT levels in the control displayed the highest values during the spermiation period. The EX group showed lower T levels than controls, but both peaked at the same time. However, 11-KT levels remained low and unchanged. The CO group displayed two significant increases in T levels accordingly with the spermiation pattern, while the 11-KT profile only exhibited a significant increase 2 months earlier than in controls. Results obtained indicated an involvement of GTH-2 in gonadal maturation. In addition, T is suggested to be involved in the activation of the brain–pituitary–gonad (BPG) axis during pubertal development, while 11-KT may act by stimulating spermatogenesis and/or spermiation in juvenile male sea bass. Furthermore, the profiles of these reproductive hormones were altered by both expanded and compressed photoperiods, and first sexual maturation was advanced by at least 2 months.</div>
</front>
</TEI>
<affiliations><list><country><li>Espagne</li>
</country>
</list>
<tree><country name="Espagne"><noRegion><name sortKey="Rodr Guez, Lucinda" sort="Rodr Guez, Lucinda" uniqKey="Rodr Guez L" first="Lucinda" last="Rodr Guez">Lucinda Rodr Guez</name>
</noRegion>
<name sortKey="Begtashi, Ideal" sort="Begtashi, Ideal" uniqKey="Begtashi I" first="Ideal" last="Begtashi">Ideal Begtashi</name>
<name sortKey="Carrillo, Manuel" sort="Carrillo, Manuel" uniqKey="Carrillo M" first="Manuel" last="Carrillo">Manuel Carrillo</name>
<name sortKey="Carrillo, Manuel" sort="Carrillo, Manuel" uniqKey="Carrillo M" first="Manuel" last="Carrillo">Manuel Carrillo</name>
<name sortKey="Shaw, M Nica" sort="Shaw, M Nica" uniqKey="Shaw M" first="M Nica" last="Shaw">M Nica Shaw</name>
<name sortKey="Zanuy, Silvia" sort="Zanuy, Silvia" uniqKey="Zanuy S" first="Silvia" last="Zanuy">Silvia Zanuy</name>
</country>
</tree>
</affiliations>
</record>
Pour manipuler ce document sous Unix (Dilib)
EXPLOR_STEP=$WICRI_ROOT/Wicri/Eau/explor/EsturgeonV1/Data/Main/Exploration
HfdSelect -h $EXPLOR_STEP/biblio.hfd -nk 001421 | SxmlIndent | more
Ou
HfdSelect -h $EXPLOR_AREA/Data/Main/Exploration/biblio.hfd -nk 001421 | SxmlIndent | more
Pour mettre un lien sur cette page dans le réseau Wicri
{{Explor lien |wiki= Wicri/Eau |area= EsturgeonV1 |flux= Main |étape= Exploration |type= RBID |clé= ISTEX:EAD3DD39EBD4340D1774A862250BB6DC83D16BC0 |texte= Changes in plasma levels of reproductive hormones during first sexual maturation in European male sea bass ( Dicentrarchus labrax L.) under artificial day lengths }}
![]() | This area was generated with Dilib version V0.6.27. | ![]() |