Efatpanah Iraj, Falahatkar Bahram, Sajjadi Mir Masoud, Monsef Shokri Maryam
Fisheries Department, Faculty of Natural Resources, University of Guilan, Sowmeh Sara, Guilan, Iran.
Department of Marine Sciences, The Caspian Sea Basin Research Center, University of Guilan, Rasht, Guilan, Iran.
Aquac Nutr. 2024 May 13;2024:6975546. doi: 10.1155/2024/6975546. eCollection 2024.
This study aimed to examine the effect of various live foods on the fatty acids (FAs) and amino acids (AAs) profiles in Persian sturgeon () larvae. One thousand and two hundred larvae were cultured in circular concrete tanks, and four treatments were administered as: (1) + , (2) , (3) + Chironomid, and (4) Chironomid. Each treatment was considered as three replicates over an 11-day period. At the end of the experiment, treatment 1 ( + ) showed the highest average weight of larvae, and the lowest weight was observed in treatment 4 (Chironomid). Survival rate ranged from 83.84% to 88.86% and no significant difference was observed among the groups ( > 0.05). Among -fed larvae, the predominant FAs were docosahexaenoic acid (DHA), oleic acid (9), and monounsaturated fatty acids (MUFA), while saturated fatty acids (SFA) and polyunsaturated fatty acids (PUFA) (3 + 6) were present in a lesser proportion ( < 0.05). In larvae fed with and , the predominant proportions were observed in SFAs, eicosapentaenoic acid (EPA), 3, DHA + EPA, and the n3/n6 ratio, all registering the highest percentages. Conversely, MUFA, 6, and the DHA/EPA ratio displayed the lowest percentages ( < 0.05). Moreover, larvae fed with exhibited higher levels of 6, PUFA (3 + 6), and DHA/EPA ratio. In contrast, larvae fed with Chironomid showed lower levels of EPA, DHA + EPA, and n3/n6 ratio ( < 0.05). Among larvae fed with Chironomid, solely the DHA/EPA ratio exhibited a higher value compared to larvae fed with and ( < 0.05). The amount of leucine in fish fed + was more than the other treatments ( < 0.05). This study revealed a significant difference in amino acids composition among various live foods ( < 0.05), but no significant difference in AAs was observed in the body of Persian sturgeon larvae ( > 0.05). The results of this study suggest that the Persian sturgeon larvae possess the ability to maintain a balanced state of AAs. It is also evident that the FA profile of different live foods can affect the overall FA levels in the body of Persian sturgeon larvae, ultimately contributing to the enhancement of fish survival rate and growth.
本研究旨在考察不同活饵对波斯鲟（）幼鱼脂肪酸（FAs）和氨基酸（AAs）谱的影响。1200尾幼鱼养殖于圆形混凝土池中，设置4种处理方式：（1） + ，（2） ，（3） + 摇蚊，（4） 摇蚊。每种处理设3个重复，实验周期为11天。实验结束时，处理1（ + ）的幼鱼平均体重最高，处理4（摇蚊）的体重最低。成活率在83.84%至88.86%之间，各组间无显著差异（ > 0.05）。在以 投喂的幼鱼中，主要脂肪酸为二十二碳六烯酸（DHA）、油酸（9）和单不饱和脂肪酸（MUFA），而饱和脂肪酸（SFA）和多不饱和脂肪酸（PUFA）（3 + 6）的比例较低（ < 0.05）。在以 和 投喂的幼鱼中，SFA、二十碳五烯酸（EPA）、3、DHA + EPA以及n3/n6比值的比例最高。相反，MUFA、6以及DHA/EPA比值的比例最低（ < 0.05）。此外，以 投喂的幼鱼中6、PUFA（3 + ６）以及DHA/EPA比值的水平较高。相比之下，以摇蚊投喂的幼鱼中EPA、DHA + EPA以及n3/n6比值的水平较低（ < 0.05）。在以摇蚊投喂的幼鱼中，仅DHA/EPA比值相较于以 和 投喂的幼鱼呈现较高的值（ < 0.05）。以 + 投喂的鱼体内亮氨酸含量高于其他处理组（ < 0.05）。本研究揭示了不同活饵的氨基酸组成存在显著差异（ < 0.05），但在波斯鲟幼鱼体内氨基酸无显著差异（ > 0.05）。本研究结果表明，波斯鲟幼鱼具有维持氨基酸平衡状态的能力。同样明显的是，不同活饵的脂肪酸谱会影响波斯鲟幼鱼体内的整体脂肪酸水平，最终有助于提高鱼类的成活率和生长速度。
