Advancement and synchronisation of spawning in Salmo gairdneri and S. trutta following administration of LRH-A combined or not with pimozide
Identifieur interne : 000756 ( Istex/Corpus ); précédent : 000755; suivant : 000757Advancement and synchronisation of spawning in Salmo gairdneri and S. trutta following administration of LRH-A combined or not with pimozide
Auteurs : R. Billard ; P. Reinaud ; M. G. Hollebecq ; B. BretonSource :
- Aquaculture [ 0044-8486 ] ; 1984.
Abstract
Prior to the onset of the spawning season female rainbow trout were injected intraperitoneally (IP) with LRH-A ([des Gly10 D-Ala6] LHRH ethylamide) alone at a dose of 1 μg/kg body weight or in combination with pimozide (PIM, 10 mg/kg body weight), a dopamine antagonist, given 6 h before the LRH-A. Pimozide + LRH-A and pimozide alone induced a significant elevation in plasma GTH but only PIM + LRH-A consistently advanded ovulation. Egg quality was altered with PIM + LRH-A and PIM + saline, resulting in lower survival at the eyed stage.Prior to the onset of the spawning period, brown trout were injected IP with LRH-A alone at doses of 1, 10 and 20 μg/kg body weight. A single injection slightly initiated and synchronized ovulation at doses of 10 and 20 μg; a second injection given 6 days later did not modify the ovulation profile. There was no effect when the same doses were given in pelleted form in silicone rubber implants. When LRH-A and PIM were injected IP 6 h apart at doses of 10 and 1 mg/kg body weight PIM and 10 μg/kg body weight LRH-A, ovulation was slightly stimulated. The effects of LRH-A given in silicone rubber implants were potentiated by simultaneous injection of PIM (10 mg/kg body weight). No alteration of egg quality was observed after these various treatments on brown trout.
Url:
DOI: 10.1016/0044-8486(84)90009-7
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<front><div type="abstract" xml:lang="en">Prior to the onset of the spawning season female rainbow trout were injected intraperitoneally (IP) with LRH-A ([des Gly10 D-Ala6] LHRH ethylamide) alone at a dose of 1 μg/kg body weight or in combination with pimozide (PIM, 10 mg/kg body weight), a dopamine antagonist, given 6 h before the LRH-A. Pimozide + LRH-A and pimozide alone induced a significant elevation in plasma GTH but only PIM + LRH-A consistently advanded ovulation. Egg quality was altered with PIM + LRH-A and PIM + saline, resulting in lower survival at the eyed stage.Prior to the onset of the spawning period, brown trout were injected IP with LRH-A alone at doses of 1, 10 and 20 μg/kg body weight. A single injection slightly initiated and synchronized ovulation at doses of 10 and 20 μg; a second injection given 6 days later did not modify the ovulation profile. There was no effect when the same doses were given in pelleted form in silicone rubber implants. When LRH-A and PIM were injected IP 6 h apart at doses of 10 and 1 mg/kg body weight PIM and 10 μg/kg body weight LRH-A, ovulation was slightly stimulated. The effects of LRH-A given in silicone rubber implants were potentiated by simultaneous injection of PIM (10 mg/kg body weight). No alteration of egg quality was observed after these various treatments on brown trout.</div>
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<ce:abstract-sec><ce:simple-para>Prior to the onset of the spawning season female rainbow trout were injected intraperitoneally (IP) with LRH-A ([des Gly<ce:sup>10</ce:sup>
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<ce:simple-para>Prior to the onset of the spawning period, brown trout were injected IP with LRH-A alone at doses of 1, 10 and 20 μg/kg body weight. A single injection slightly initiated and synchronized ovulation at doses of 10 and 20 μg; a second injection given 6 days later did not modify the ovulation profile. There was no effect when the same doses were given in pelleted form in silicone rubber implants. When LRH-A and PIM were injected IP 6 h apart at doses of 10 and 1 mg/kg body weight PIM and 10 μg/kg body weight LRH-A, ovulation was slightly stimulated. The effects of LRH-A given in silicone rubber implants were potentiated by simultaneous injection of PIM (10 mg/kg body weight). No alteration of egg quality was observed after these various treatments on brown trout.</ce:simple-para>
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<abstract lang="en">Prior to the onset of the spawning season female rainbow trout were injected intraperitoneally (IP) with LRH-A ([des Gly10 D-Ala6] LHRH ethylamide) alone at a dose of 1 μg/kg body weight or in combination with pimozide (PIM, 10 mg/kg body weight), a dopamine antagonist, given 6 h before the LRH-A. Pimozide + LRH-A and pimozide alone induced a significant elevation in plasma GTH but only PIM + LRH-A consistently advanded ovulation. Egg quality was altered with PIM + LRH-A and PIM + saline, resulting in lower survival at the eyed stage.Prior to the onset of the spawning period, brown trout were injected IP with LRH-A alone at doses of 1, 10 and 20 μg/kg body weight. A single injection slightly initiated and synchronized ovulation at doses of 10 and 20 μg; a second injection given 6 days later did not modify the ovulation profile. There was no effect when the same doses were given in pelleted form in silicone rubber implants. When LRH-A and PIM were injected IP 6 h apart at doses of 10 and 1 mg/kg body weight PIM and 10 μg/kg body weight LRH-A, ovulation was slightly stimulated. The effects of LRH-A given in silicone rubber implants were potentiated by simultaneous injection of PIM (10 mg/kg body weight). No alteration of egg quality was observed after these various treatments on brown trout.</abstract>
<subject><genre>article-category</genre>
<topic>Endocrinology</topic>
</subject>
<relatedItem type="host"><titleInfo><title>Aquaculture</title>
</titleInfo>
<titleInfo type="abbreviated"><title>AQUA</title>
</titleInfo>
<name type="conference"><namePart>Salmonid Reproduction - An International Symposium</namePart>
<namePart type="date">19831031</namePart>
<namePart type="date">19831102</namePart>
</name>
<name type="personal"><namePart>Stacia A. Sower</namePart>
<role><roleTerm type="text">editor</roleTerm>
</role>
</name>
<name type="personal"><namePart>Robert N. Iwamoto</namePart>
<role><roleTerm type="text">editor</roleTerm>
</role>
</name>
<genre type="journal">journal</genre>
<originInfo><dateIssued encoding="w3cdtf">19841215</dateIssued>
</originInfo>
<identifier type="ISSN">0044-8486</identifier>
<identifier type="PII">S0044-8486(00)X0170-6</identifier>
<part><date>19841215</date>
<detail type="issue"><title>Salmonid Reproduction - An International Symposium </title>
</detail>
<detail type="volume"><number>43</number>
<caption>vol.</caption>
</detail>
<detail type="issue"><number>1–3</number>
<caption>no.</caption>
</detail>
<extent unit="issue pages"><start>1</start>
<end>356</end>
</extent>
<extent unit="pages"><start>57</start>
<end>66</end>
</extent>
</part>
</relatedItem>
<identifier type="istex">C6AE2AB58355720D634839FEFEBE3C0609C96511</identifier>
<identifier type="DOI">10.1016/0044-8486(84)90009-7</identifier>
<identifier type="PII">0044-8486(84)90009-7</identifier>
<recordInfo><recordContentSource>ELSEVIER</recordContentSource>
</recordInfo>
</mods>
</metadata>
</istex>
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