单性和混合性养殖银鲶鱼的性能和胴体产量

Hanna Karolyna Dos Santos, R. E. Balen, P. S. Dias, Émerson José Alves Matos, F. Meurer
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引用次数: 0

摘要

摘要-进行了一项持续180天的实验,以评估在封闭再循环系统中饲养时,性别对银鲶鱼(Rhamdia quelen)性能和产量的影响,该系统仅使用雄性、雌性或两性。总共使用了300条鱼(41.49±6.82克和16.53±0.95厘米),包括150只雌性和150只雄性,分布在一个实验结构中,该实验结构由三个封闭的水再循环系统组成,该系统连接到一个20000升的培养箱和一个由3500升h-1水泵连接的20000升生物过滤箱。第一个系统包含100只雌性,第二个系统包含了100只雄性,第三个系统包含50只雌性和50只雄性。观察到,无论性别,鱼的体重变化都很大。雌性体重增加和比生长率分别比雄性高41.51%和28.94%,表现出比单性饲养或混合饲养系统中饲养的雄性更大的生长,对化学成分或树干产量没有影响。因此,研究结果表明,雄性和雌性银鲶鱼的体重差异很大,雌性比单性或混合性饲养的雄性获得更多的生物量。
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Performance and carcass yield of silver catfish raised in monosex and mixed-sex systems
Abstract - An experiment lasting 180 days was carried out to evaluate the influence of sex on the performance and production of silver catfish (Rhamdia quelen) when reared in closed recirculation systems using only males, only females, or with both genders. A total of 300 fish (41.49 ± 6.82 g and 16.53 ± 0.95 cm) were used, comprising 150 females and 150 males distributed in an experimental structure consisting of three closed water recirculation systems coupled to a 20,000 L culture tank and a 20,000 L biofiltration tank connected by a 3,500 L h-1 water pump. The first system contained 100 females, the second, 100 males, and the third, 50 females and 50 males. High fish weight variations were observed regardless of sex. Female weight gains and specific growth rates were 41.51 % and 28.94 % higher compared to males, respectively, exhibiting greater growth than males raised monosexually or in mixed rearing systems, with no effect on chemical composition or trunk yield. The findings thus indicate that both male and female silver catfish exhibit wide weight variations and females that gain more biomass than males reared monosexually or in mixed-sex systems.
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发文量
12
审稿时长
25 weeks
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