Effects of different levels of soybean and canola meal on the growth and carcass composition of grass carp, Ctenopharyngodon idella fingerling

Amirisendesi, Seyed Afshin; Borani, Mohammad; Akbari Nargesi, Erfan; Sharifian, Mansour; Hafezieh, Mahmoud; Mirhasheminasab, Seyed Fakhraddin

doi:10.22124/janb.2025.29087.1262

Effects of different levels of soybean and canola meal on the growth and carcass composition of grass carp, Ctenopharyngodon idella fingerling

Document Type : Research Paper

Authors

¹ Inland Waters Aquaculture Research Center, Iranian Fisheries Science Research Institute (IFSRI), Agriculture Research Education and Extension Organization (AREEO), Bandar Anzali, Guilan, Iran

² Iranian Fisheries Science Research Institute (IFSRI), Agriculture Research Education and Extension Organization (AREEO)

10.22124/janb.2025.29087.1262

Abstract

Introduction: Grass carp, Ctenopharyngodon idella, is considered one of the most commercially important farmed fish in the world. One of the important factors in the development of aquaculture is to provide a suitable ration that can meet the nutritional requirements of this fish, and on the other hand, the ration should be as cheap as possible so ultimately to achieve cheaper food by optimizing the food ration. In this research, the effect of different levels of soybean meal and canola on growth parameters and carcass composition of grass carp fingerlings with an average initial weight of 7.56 ± 1.12 g (mean ± SD) were investigated for 60 days.
Materials and methods: Experiments were conducted in 100-L fiberglass tanks containing 7 grass carp fingerlings in 3 repetitions, with a total of 9 experimental tanks. The three treatments included Treatment 1 (T₁) with a diet containing 24.5% soybean meal and 24.5% canola meal, Treatment 2 (T₂) with 29% canola meal and 21% soybean meal, and Treatment 3 (T₃) with 28% soybean meal and 20% canola meal. The tanks were divided completely randomly.
Results and discussion: According to Duncan test, differences were observed between the treatments in terms of mean food conversion ratio (FCR), specific growth rate, and weight gain (P<0.05). The results showed that the maximum and minimum amounts of weight gain were occurred in T₃ (89.91 ± 2.4 g) and T₂ (58.39 ± 13.17 g), respectively. The minimum of special growth rate (0.70 ± 0.15 %/day) was observed in T₂, while the maximum (1.06 ± 0.02 %/day) in T₃. The minimum average of FCR (2.09 ± 0.05) was found in T₃ while the maximum (3.69 ± 1.09) in T₂. The results obtained from the Kruskal-Wallis test did not exhibit any significant difference among different treatments in terms of the biochemical composition of the fingerling carcasses, including protein, fat, ash, and moisture contents (P<0.05).
Conclusion: According to the obtained results, it seems that 28% soybean meal and 20% canola are the most suitable levels in the diet of grass carp fingerlings.

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