黑海大马哈鱼(Salmo labrax PALLAS, 1814)不同年龄第一性成熟繁殖性能的比较

Osman Tolga Özel, Eyüp Çakmak, Ekrem Cem Çankırılıgil, Zehra Duygu Düzgüneş, Recayi Çimagil, Esin Batır
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引用次数: 0

摘要

本研究的目的是通过申请选择性育种计划,确定黑海鲑鱼(Salmo labrax) F6代孵化场源性亲鱼的个体首次成熟年龄多样性。研究于2018-2021年间在淡水池塘和海洋网箱系统中进行。本研究分别选取22、34和46月龄达到第一次性成熟的亲鱼136、87和3只。测定了不同年龄性成熟的亲鱼第一次剥卵时的总产蛋量、相对产蛋量、卵径和受精率。首次性腺发育控制和剥离研究分别于2018-2019年、2019-2020年和2020-2021年对22月龄的亲鱼、34月龄的亲鱼和46月龄的亲鱼进行。剥壳后22、34、46月龄鱼的总产卵量分别为1108.98±40.73、3869.02±138.43和5899.52±1143.78个蛋/kg,相对产卵量分别为3024.87±87.52、2291.90±89.52和1816.00±284.51个蛋/kg,卵径分别为4.40±0.01、5.07±0.02和5.35±0.09 mm,受精率分别为92.21±0.87%、95.69±1.65%和89.83±2.77%。砧木条件因子值分别为1.05±0.02(22个月)、1.09±0.01(34个月)和1.08±0.03(46个月)。第一次成熟年龄为22月龄的幼鱼以红色斑点为主,周围有白色晕,34月龄为银色带黑色斑点,46月龄为银色带黑色斑点。在淡水中养殖黑海鲑鱼的企业和有餐厅的企业更喜欢红点河流生态型的生产,而在海洋网箱中生产的企业更喜欢黑点-银色的海洋生态型,其身体颜色与大西洋鲑鱼相似。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Comparison of reproductive performance of Black Sea salmon broodstock (Salmo labrax PALLAS, 1814) reaching first sexual maturity at different ages
The aim of this study was to determine the individual first maturation age diversity in hatchery-originated F6 generation of Black Sea salmon (Salmo labrax) broodstock created by applying for a selective breeding program. Research was carried out in freshwater ponds and marine net cage systems between 2018-2021. In the study, 136, 87 and 3 individuals from the broodstocks that reached the first sexual maturity at the age of 22, 34 and 46 months were used, respectively. Total egg production, relative egg production, egg diameter and fertilization rates were determined at the first stripping of broodstock that reached sexual maturity at different ages. The first gonadal development controls and stripping studies were carried out in the period of 2018-2019 for 22 months old broodstock, 2019-2020 for 34 months old and 2020-2021 for 46 months old. Total fecundity of 22, 34 and 46 months old broodstocks that were stripped, were calculated at 1108.98±40.73, 3869.02±138.43 and 5899.52±1143.78 egg/kg broodstock, relative fecundity was 3024.87±87.52, 2291.90±89.52 and 1816.00±284.51 egg/kg broodstock, egg diameters were 4.40±0.01, 5.07±0.02 and 5.35±0.09 mm and fertilization rates were determined as 92.21±0.87%, 95.69±1.65% and 89.83±2.77%, respectively. The condition factor values of the rootstocks were determined as 1.05±0.02 (22 months old), 1.09±0.01 (34 months old) and 1.08±0.03 (46 months old). In the broodstock, individuals with a first maturation age of 22 months have predominantly red spots with a white halo around the perimeter, silvery coloration with black spots at 34 months of age, and silvery coloration with black spots at 46 months of age were detected. While enterprises that reared Black Sea salmon in freshwater and have restaurants prefer the red-spotted river ecotype for production, enterprises that produce in marine net cages prefer the black-spotted-silver-colored marine ecotype, whose body coloration is similar to Atlantic salmon.
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