The effects of GnRHa with and without dopamine antagonist on reproductive hormone levels and ovum viability in tench Tinca tinca

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12520%2F16%3A43890537" target="_blank" >RIV/60076658:12520/16:43890537 - isvavai.cz</a>

Result on the web

<a href="http://www.sciencedirect.com/science/article/pii/S0044848616304677" target="_blank" >http://www.sciencedirect.com/science/article/pii/S0044848616304677</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.aquaculture.2016.09.012" target="_blank" >10.1016/j.aquaculture.2016.09.012</a>

Result language

angličtina

Original language name

The effects of GnRHa with and without dopamine antagonist on reproductive hormone levels and ovum viability in tench Tinca tinca

Original language description

The study evaluated the impact of mGnRHa ([D-Tle(6), Pro(9), NEt]-mGnRH), with or without metoclopramide, on release of luteinizing hormone (LH) and sex steroids and on viability of ova in tench Tinca tinca. Four experimental groups were subjected to the following treatments given as intraperitoneal injection: 0.9% NaCl (C); 25 mu g kg(-1) mGnRHa (Gn); 25 mu g kg(-1) mGnRHa with 20 mg kg(-1) metoclopramide (GnM); and or 20 mg kg(-1) metoclopramide (M). GnM treatment induced LH surge reaching maximum concentrations 6 h post-treatment followed by a slight but significant decline (P < 0.05). Gn group showed gradually increasing LH values (P < 0.05). No significant differences were found between GnM and Gn treated groups in 17 beta-estradiol (E-2) or testosterone blood level. Significant decrease from baseline (P < 0.05) was found in E-2 values at the end of trial period in both Gn and GnM. Testosterone values increased with Gn and the GnM, peaking 12 h post-treatment and dropping to baseline levels at 24 h. GnM was associated with significant increase of 17 alpha, 20 beta-dihydroxy-4-pregnen-3-one (17,20 beta-P) values at 6 h (P < 0.05), with its concentration peaking at 12 h similar to that in Gn. Both treatments induced ovulation in a high proportion of females, while M and C group showed no ovulation. No significant differences were found in ovulation rate, latency, ovum weight, or relative fecundity. Nevertheless, significant differences (P < 0.05) between Gn and GnM treatment were observed in fertility (77% vs. 54%) and hatching (40% vs. 23%). GnM stimulated rapid LH release with a potentiating effect on 17,20 beta-P secretion, possibly the source of the adverse effects on ovum viability. We describe for the first time the negative impact of metoclopramide combined with mGnRHa hormone treatment on ovum quality in tench. Statement of relevance: Improvement of fish artificial reproduction.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

GL - Fishery

OECD FORD branch

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Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2016

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Aquaculture

ISSN

0044-8486

e-ISSN

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Volume of the periodical

465

Issue of the periodical within the volume

December

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

6

Pages from-to

158-163

UT code for WoS article

000385372200022

EID of the result in the Scopus database

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