PDF(Pubmed)
Abstract：
To explore a method of improving the reproductive performance of the striped bamboo shark, three groups (D0, D1, and D2) of mature individuals were fed squid with (D1 and D2) or without (D0) a nutritional fortifier during the breeding seasons of 2022 and 2023. Compared with the D0 group, the D1 and D2 groups had an increase of 20.90% and 31.34% in total eggs, increases of 32.73% and 41.82% in the proportion of lecithal eggs, and a total 119.07% increase in hatching rate, respectively, in 2022. In 2023, the corresponding increase was 17.12% and 9.91% in total eggs, 19.63% and 12.15% in the proportion of lecithal eggs, 43.37% and 43.94% in fertilization rate, 23.94% and 22.22% in hatchability rate, and 66.70% and 8.70% in the survival rate of fry. Moreover, the levels of serum estradiol, testosterone, progesterone, albumin, and total antioxidant capacity and the levels of ARA, EPA, DHA, n-3 PUFA, and n-6 PUFA in both serum and lecithal eggs significantly increased, while the levels of serum triglyceride and total cholesterol were the opposite (p < 0.05). The results demonstrate that feeding the sharks with a nutritional fortifier can increase spawn production and the quality of eggs, regulate the production of sex steroids, and improve the nutrition of eggs and the health of broodstocks.
摘要：
探索一种提高条纹竹鲨繁殖性能的方法,在2022年和2023年的繁殖季节，向三组（D0，D1和D2）的成熟个体喂食（D1和D2）或不使用（D0）营养强化剂的鱿鱼。与D0组相比，D1和D2组卵总量分别增加了20.90%和31.34%,卵磷脂的比例分别增加了32.73%和41.82%，孵化率总共增加了119.07%，分别,2022年。2023年，鸡蛋总量相应增长17.12%和9.91%，卵磷脂的比例分别为19.63%和12.15%,受精率分别为43.37%和43.94%,孵化率分别为23.94%和22.22%,鱼苗成活率分别为66.70%和8.70%。此外，血清雌二醇的水平，睾丸激素，黄体酮,白蛋白,总抗氧化能力和ARA水平，EPA,DHA,n-3PUFA,血清和卵磷脂中的n-6PUFA均显着增加，而血清甘油三酯和总胆固醇水平则相反(p<0.05)。结果表明，用营养强化剂喂养鲨鱼可以提高产卵量和鸡蛋质量，调节性类固醇的产生，改善鸡蛋的营养和亲鱼的健康。
