This study investigated the effect of two lipid sources on reproduction performance and growth in pearl gourami. For this purpose, 180 fish (3.32 ± 0.25 g) were fed with three isoenergetic (19.80) and isonitrogenous diets (480 g/kg protein) including FO (80 g/kg fish oil), FS (40 g/kg fish oil and 40 g/kg soybean oil) and SO (80 g/kg soybean oil) for 10 weeks before maturation. At the end of the trial, there was no significant difference in weight gain, feed conversation ratio and body composition between fish fed FO and FS diets. Individuals fed dietary FO had significantly higher levels of n‐3 long‐chain polyunsaturated fatty acids in the muscle (130.5 g/kg lipid) and ovary (140.4 g/kg lipid) as compared with those fed SO diet (64.5, 103.6 g/kg, respectively) (p < .05). Feeding pearl gourami with FO and FS diets enhanced regarding absolute fecundity, relative fecundity, the fertilization rate, larvae total length and survival at 3 day posthatch (p < .05). Also, 17 beta‐estradiol in plasma of fish fed dietary FO (6.2 ng/L) was higher than those fed SO diet (1.7 ng/L) (p < .05). In conclusion, we suggest FS diet for broodstock nutrition of pearl gourami as a model for asynchronous multi‐batch spawning fish.

中文翻译：

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饲料鱼和植物油对珍珠吻口鱼（Trichogaster leeri）生长性能、身体成分、脂肪酸谱、繁殖性能和幼虫抵抗力的影响

本研究调查了两种脂质来源对珍珠鳗繁殖性能和生长的影响。为此，给 180 条鱼 (3.32 ± 0.25 g) 喂食三种等能 (19.80) 和等氮饲料（480 g/kg 蛋白质），包括 FO（80 g/kg 鱼油）、FS（40 g/kg 鱼油和40 g/kg 大豆油）和 SO（80 g/kg 大豆油）在成熟前 10 周。在试验结束时，饲喂 FO 和 FS 饮食的鱼在体重增加、饲料转化率和身体成分方面没有显着差异。与饲喂 SO 饮食（64.5、103.6 g/kg 脂质）和卵巢（140.4 g/kg 脂质）相比，饲喂 FO 饮食的个体在肌肉（130.5 g/kg 脂质）和卵巢（140.4 g/kg 脂质）中的 n-3 长链多不饱和脂肪酸水平显着更高。 kg) (p < .05)。在绝对繁殖力、相对繁殖力、受精率、幼虫总长度和孵化后第 3 天的存活率方面，用 FO 和 FS 日粮喂养珍珠鲈鱼（p < .05）。此外，饲喂膳食 FO (6.2 ng/L) 的鱼血浆中的 17 β-雌二醇高于饲喂 SO 饲料的鱼 (1.7 ng/L) (p < .05)。总之，我们建议将 FS 饲料用于珍珠鲈亲鱼营养，作为异步多批次产卵鱼的模型。