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Nutritional evaluation of crambe meal as a partial replacement of soybean meal in Nile tilapia diet

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Abstract

A variety of plant protein sources have been evaluated in aquafeeds. Crambe meal (CM) has potential for inclusion in fish diets because of its nutritional composition. This study evaluated the apparent digestibility coefficient (ADC) of crambe meal and its potential to partially replace soybean meal (SM) protein in Nile tilapia Oreochromis niloticus diets. The ADC for dry matter, crude protein, ether extract, energy, amino acids, calcium and phosphorus of CM were assessed in fish (n = 80; 65.30 ± 5.32 g). Subsequently, an 80-day feeding trial was conducted with Nile tilapia (n = 140; 6.04 ± 0.25 g) randomly distributed in 20 experimental cages (70 L; seven fish cage-1) allocated in five circular tanks (1000 L) in a recirculation water system, to evaluate the effects of replacement of SM by CM (0, 6, 12, 18 and 24% in isonitrogenous and isoenergetic diets) on growth, blood parameters, fillet yield and proximal composition. The CM shows good digestibility of protein (0.824) and amino acids (0.844) by Nile tilapia and its inclusion in the diet does not affect carcass and fillet yield or proximal composition. Fish fed diets with 24.0% of the SM replaced by CM showed the worst weight gain and feed conversion rate. The protein efficiency ratio decreased in fish fed diets with 12.0, 18.0 and 24.0% of the SM replaced by CM. Hemoglobin, mean corpuscular hemoglobin concentration, total plasma protein, glucose and alanine aminotransferase enzyme activity trend to increase at highest levels of CM in the diet. In conclusion, CM has high digestibility of protein and amino acids for Nile tilapia. However, anti-nutritional factors present in untreated CM interfere on the growth and nutrient utilization of Nile tilapia.

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All data generated or analyzed during this study are included in this published article.

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Acknowledgements

This research was funded by Empresa Brasileira de Pesquisa Agropecuária - Embrapa (Project nº 03.10.06.015.00). The authors are grateful to Fundação MS for crambe meal donation, Piscicultura Sgarbi for fish donation, to Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES/Brazil) for scholarship to second author, and to J.L.Pilecco, J.S.Santos, A.Lopes, G.Possani and M.A.Della-Flora for their help during sampling.

Funding

This research was supported by Empresa Brasileira de Pesquisa Agropecuária - Embrapa (Project nº 03.10.06.015.00).

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Conceptualization: Hamilton Hisano, Arielle Cristina Arena; Formal analysis: Hamilton Hisano, Pamela Souza de Pietro, Márcia Mayumi Ishikawa, Alex Júnio da Silva Cardoso, Arielle Cristina Arena; Methodology: Hamilton Hisano, Arielle Cristina Arena, Márcia Mayumi Ishikawa; Resources: Hamilton Hisano, Arielle Cristina Arena; Writing - review and editing: Hamilton Hisano, Pamela Souza de Pietro, Márcia Mayumi Ishikawa, Alex Júnio da Silva Cardoso, Arielle Cristina Arena.

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Correspondence to Hamilton Hisano.

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The authors declare no conflict of interest.

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The experimental procedures were in accordance with the ethical principles in animal research and was approved by the Committee for Ethics in Animal Experimentation at the Universidade Federal da Grande Dourados - UFGD, Mato Grosso do Sul, Brazil (Protocol number: 003/2011), and complies with the ethical principles issued by the Brazilian National Council for Animal Experimentation Control - CONCEA, Brasília, Brazil.

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Hisano, H., de Pietro, P.S., Ishikawa, M.M. et al. Nutritional evaluation of crambe meal as a partial replacement of soybean meal in Nile tilapia diet. Vet Res Commun 46, 1085–1095 (2022). https://doi.org/10.1007/s11259-022-09976-7

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  • DOI: https://doi.org/10.1007/s11259-022-09976-7

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