National Institute of Oceanography and Fisheries - NIOF, Aquaculture Division, Fish Rearing Laboratory, Cairo, Egypt.
Arish University, Faculty of Aquaculture and Marine Fisheries, Arish, Egypt.
Braz J Biol. 2022 Jul 26;84:e262969. doi: 10.1590/1519-6984.262969. eCollection 2022.
A 95-day feeding study was carried out to evaluate the impact of complete replacement of fish oil by plant oils in the growth performance, feed consumption fatty acid and body composition of juvenile rabbitfish, Siganus rivulatus. There were four treatments i.e., A (fish oil diet), (linseed oil diet), C (soybean meal oil diet) and D (sunflower oil diet). The experimental trial was conducted in twelve 1.5-m3 fiber glass tanks (n=3). Spinefoot rabbitfish juveniles had an average initial weight of 0.948 g ± 0.124 g and they were stocked at 50 fish per tank. Fish fed diet A showed significantly better growth rate, final body weight, and total body weight than fish fed on the other diets. Moreover, the best FCR was observed for diet A followed by diet C and diets B and D had the worst FCR. Fish body composition for crude protein, dry matter, ashes and gross energy at the end of the trial had not differed between the treatments. The highest polyunsaturated fatty acids (PUFA) was found in fish fed diet A followed in decreasing order by diets D, B, and C. Fish oil is a better dietary lipid source for Spinefoot rabbitfish juveniles, Siganus rivulatus, than plant oils. Among plant oils, soybean oil was better than linseed oil and sunflower oil as the main dietary fat source.
进行了为期 95 天的饲养研究，以评估在生长性能、饲料消耗脂肪酸和体组成方面，用植物油脂完全替代鱼油对幼年军曹鱼（Siganus rivulatus）的影响。共有 4 种处理，即 A（鱼油饮食）、B（亚麻籽油饮食）、C（豆粕油饮食）和 D（葵花籽油饮食）。实验在 12 个 1.5m3 的纤维玻璃缸中进行（n=3）。棘鳍鲈幼鱼初始平均体重为 0.948g±0.124g，每缸放养 50 尾鱼。与其他饮食相比，摄食 A 饮食的鱼表现出显著更好的生长率、最终体重和总体重。此外，A 饮食表现出最佳的饲料转化率，其次是 C 饮食，B 和 D 饮食的饲料转化率最差。试验结束时，鱼体的粗蛋白、干物质、灰分和总能组成在处理之间没有差异。摄食 A 饮食的鱼的多不饱和脂肪酸（PUFA）最高，其次是 D 饮食、B 饮食和 C 饮食。与植物油脂相比，鱼油是棘鳍鲈幼鱼更好的膳食脂质来源。在植物油脂中，大豆油作为主要的膳食脂肪来源优于亚麻籽油和葵花籽油。
