Department of Lake and River Fisheries, Faculty on Environmental Sciences, University of Warmia and Mazury, Olsztyn, PL-10-719 Olsztyn, Al. Warszawska 117A, Poland.
Department of Lake and River Fisheries, Faculty on Environmental Sciences, University of Warmia and Mazury, Olsztyn, PL-10-719 Olsztyn, Al. Warszawska 117A, Poland.
Anim Reprod Sci. 2019 Mar;202:21-25. doi: 10.1016/j.anireprosci.2019.01.003. Epub 2019 Jan 8.
This study focused on the artificial reproduction of common dace Leuciscus leuciscus (L.) outside the reproductive season. The results indicate there is the possibility of initiating the reproducion in individuals of this before the natural spawning season. There could be induction of spermiation by altering the environmental conditions. For females, hormonal injections were necessary for induction of final oocyte maturation and ovulation. Generally, there were high percentages of spermiation (100%) and ovulation (87%-100%) as well as low mortality (0%-11% and 7%-13% for males and females, respectively) among the induced spawners. The greatest embryo survival occurred when Ovaprim (84.4%) or hCG (89.6%) was administered, although the latency time using hCG was at least twice as long compared to when other spawning agents were used (84-92 hrs and 30-44 hrs). The results from present study could be applicable for optimization of breeding stock numbers in aquaculture enterprises and in providing insights for conservation of L. leuciscus endangered populations.
本研究聚焦于在繁殖季节之外人工繁殖普通鲤鱼（Leuciscus leuciscus（L.））。结果表明，有可能在自然产卵季节之前诱导个体开始繁殖。通过改变环境条件，可以诱导精子发生。对于雌性，需要激素注射来诱导卵母细胞的最终成熟和排卵。一般来说，诱导产卵的雄性和雌性的精子发生（100%）和排卵（87%-100%）以及死亡率（雄性和雌性分别为 0%-11%和 7%-13%）都很高。当使用 Ovaprim（84.4%）或 hCG（89.6%）时，胚胎的存活率最高，尽管与使用其他产卵剂相比，hCG 的潜伏期至少长两倍（84-92 小时和 30-44 小时）。本研究的结果可适用于优化水产养殖企业的繁殖种群数量，并为保护处于濒危状态的 L. leuciscus 种群提供参考。
