Gelatin in replacement of bovine heart in feed training ofLophiosilurus alexandri in different water salinities

Anais da Academia Brasileira de Ciências

Ana Lucia Salaro¹  JosÉ C. Oliveira Junior¹  Frederico W. Lima¹  Renato B. Ferraz¹  Marcelo D. Pontes¹  Daniel A.v. Campelo¹  Jener A.s. Zuanon¹  Ronald K. Luz¹ 

关键词: carnivorous fish;    feed training efficiency;    management efficiency;    neotropical fish;    peixe carnívoro;    eficiência do condicionamento alimentar;    eficiência do manejo;    peixe neotropical;   

DOI  :  10.1590/0001-3765201520140575

来源: SciELO

【 摘 要 】

ABSTRACT The aim of this study was to evaluate commercial gelatin in the total replacement of bovine heart in feed training of "pacamã" Lophiosilurus alexandri in different water salinities. A completely randomized experimental design, in a 2 × 3 factorial arrangement, was performed using two types of moist ingredients (bovine heart and gelatin) and three water salinities (0.0; 2.0 and 4.0 g of salt L-1) with three replications. Juveniles (2.39 ± 0.08 cm standard length and 0.20 ± 0.03 g of weight) were conditioned to accept commercial diets by the technique of the gradual transition of ingredients. At the end of 36 days no differences were observed to weight gain, length gain and specific growth rate. The feed training efficiency was better (P < 0.05) with the gelatin use, 100.0%. There was a negative effect of salinity on the survival rate and management efficiency in the concentration of 4 g of salt L-1, with values of 58.6 ± 12.0 % and 58.0 ± 12.0 %, respectively. Lophiosilurus alexandri juveniles could be feed-trained to accept commercial diets with gelatin in the total replacement of bovine heart in freshwater or salinity of 2 g of salt L-1.

【 授权许可】

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