Gonadotropin releasing hormone‐analogue (GnRHa) treatment improves the milt production and sperm motility of endangered Caspian brown trout, Salmo trutta caspius, over the course of a spawning season
Identifieur interne : 000680 ( Main/Merge ); précédent : 000679; suivant : 000681Gonadotropin releasing hormone‐analogue (GnRHa) treatment improves the milt production and sperm motility of endangered Caspian brown trout, Salmo trutta caspius, over the course of a spawning season
Auteurs : Saeed Hajirezaee [Iran] ; Bagher Mojazi Amiri [Iran] ; Mehdi Mehrpoosh [Iran] ; Samane Nazeri [Iran] ; Hamid Niksirat [Iran]Source :
- Aquaculture Research [ 1355-557X ] ; 2011-11.
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Abstract
To determine the effect of gonadotropin releasing hormone‐analogue (GnRHa) treatment on the milt quality of endangered Caspian brown trout, Salmo trutta caspius, the sperm motility (percentage and duration of motility), sperm production (sperm density, spermatocrit and milt volume) and milt pH were measured for GnRHa‐treated (the treatment group) and untreated groups (the control group) during the spawning season. For untreated brooders, the values of the motility per cent, sperm density and spermatocrit decreased continuously during the spawning season while the milt volume, duration of motility and milt pH showed only a significant decrease at the end of the season. For GnRHa‐treated males, these parameters increased 14 days after GnRHa treatment (first milt collection) and then decreased continuously towards the end of the season. In addition, the values of milt and sperm density yielded per treated male were higher than that in the untreated group, although these were not statistically different. In any case, the total sum of yielded milt from the treatment group over the spawning season was higher than that in the untreated group. In this experiment, significant positive correlations were found between milt parameters as follows: sperm motility vs. milt pH; sperm density vs. spermatocrit; milt volume vs. spermatocrit; and milt volume vs. sperm density. The results show that the treatment of Caspian brown trout by GnRHa can improve the milt quality in terms of sperm motility and sperm production during a spawning season.
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DOI: 10.1111/j.1365-2109.2010.02776.x
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Karaj</wicri:regionArea><wicri:noRegion>Karaj</wicri:noRegion></affiliation></author><author><name sortKey="Mehrpoosh, Mehdi" sort="Mehrpoosh, Mehdi" uniqKey="Mehrpoosh M" first="Mehdi" last="Mehrpoosh">Mehdi Mehrpoosh</name><affiliation wicri:level="1"><country xml:lang="fr">Iran</country><wicri:regionArea>Department of Fisheries and Environmental Sciences, Faculty of Natural Resources, University of Tehran, Karaj</wicri:regionArea><wicri:noRegion>Karaj</wicri:noRegion></affiliation></author><author><name sortKey="Nazeri, Samane" sort="Nazeri, Samane" uniqKey="Nazeri S" first="Samane" last="Nazeri">Samane Nazeri</name><affiliation wicri:level="1"><country xml:lang="fr">Iran</country><wicri:regionArea>Department of Fisheries and Environmental Sciences, Faculty of Natural Resources, University of Tehran, Karaj</wicri:regionArea><wicri:noRegion>Karaj</wicri:noRegion></affiliation></author><author><name sortKey="Niksirat, Hamid" sort="Niksirat, Hamid" uniqKey="Niksirat H" first="Hamid" last="Niksirat">Hamid Niksirat</name><affiliation wicri:level="1"><country xml:lang="fr">Iran</country><wicri:regionArea>Department of Biodiversity and Ecosystem Management, Environmental Sciences Research Institute, Shahid Beheshti University, Tehran</wicri:regionArea><wicri:noRegion>Tehran</wicri:noRegion></affiliation></author></analytic><monogr></monogr><series><title level="j">Aquaculture Research</title><idno type="ISSN">1355-557X</idno><idno type="eISSN">1365-2109</idno><imprint><publisher>Blackwell Publishing Ltd</publisher><pubPlace>Oxford, UK</pubPlace><date type="published" when="2011-11">2011-11</date><biblScope unit="volume">42</biblScope><biblScope unit="issue">12</biblScope><biblScope unit="page" from="1789">1789</biblScope><biblScope unit="page" to="1795">1795</biblScope></imprint><idno type="ISSN">1355-557X</idno></series><idno type="istex">6FD3C534FA6DF99A2A63EE5F4543E4B74240FD48</idno><idno type="DOI">10.1111/j.1365-2109.2010.02776.x</idno><idno type="ArticleID">ARE2776</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">1355-557X</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Caspian brown trout</term><term>GnRHa</term><term>milt quality</term><term>spawning season</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">To determine the effect of gonadotropin releasing hormone‐analogue (GnRHa) treatment on the milt quality of endangered Caspian brown trout, Salmo trutta caspius, the sperm motility (percentage and duration of motility), sperm production (sperm density, spermatocrit and milt volume) and milt pH were measured for GnRHa‐treated (the treatment group) and untreated groups (the control group) during the spawning season. For untreated brooders, the values of the motility per cent, sperm density and spermatocrit decreased continuously during the spawning season while the milt volume, duration of motility and milt pH showed only a significant decrease at the end of the season. For GnRHa‐treated males, these parameters increased 14 days after GnRHa treatment (first milt collection) and then decreased continuously towards the end of the season. In addition, the values of milt and sperm density yielded per treated male were higher than that in the untreated group, although these were not statistically different. In any case, the total sum of yielded milt from the treatment group over the spawning season was higher than that in the untreated group. In this experiment, significant positive correlations were found between milt parameters as follows: sperm motility vs. milt pH; sperm density vs. spermatocrit; milt volume vs. spermatocrit; and milt volume vs. sperm density. The results show that the treatment of Caspian brown trout by GnRHa can improve the milt quality in terms of sperm motility and sperm production during a spawning season.</div></front></TEI></record>Pour manipuler ce document sous Unix (Dilib)
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