Poultry byproducts and swine liver used in diets for Nile tilapia juveniles

• Published in: Latin american journal of aquatic research Vol. 48; no. 5; pp. 895 - 900
• Main Authors: Valadao Carvalho, Kerolay, Luczinski, Thiago Gabriel, Boscolo, Wilson Rogerio, Azambuja de Freitas, Jakeline Marcela, Signor, Altevir
• Format: Journal Article
• Language: English; Spanish
• Published: Valparaiso Pontificia Universidad Catolica de Valparaiso, Escuela de Ciencias del Mar 01-11-2020; Pontificia Universidad Catolica de Valparaiso; Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar
• Subjects: Animals; Aquaculture; Byproducts; Control; Diet; Feeds; Fish meal; Fish-culture; FISHERIES; Fishmeal; Freshwater fishes; Inclusions; Juveniles; Liver; Livestock; MARINE & FRESHWATER BIOLOGY; Marine fishes; Morphology; Nutrition research; OCEANOGRAPHY; Oreochromis niloticus; Peptides; Poultry; Poultry industry; Protein hydrolysates; Proteins; Swine; Tilapia; Variance analysis; Brazil; Germany; aquaculture; protein hydrolysates; Oreochromis niloticus; byproducts; fish nutrition; histology
• ISSN: 0718-560X; 0718-560X
• DOI: 10.3856/vol48-issue5-fulltext-2524

This study aimed at evaluating diets containing protein hydrolysate from poultry byproducts and swine liver (PHPPL), at different inclusion levels, for Nile tilapia (Oreochromis niloticus) juveniles. Seven diets were evaluated, being a negative control (free of both hydrolysate and fishmeal) and positive control (free of hydrolysate but containing fishmeal), besides five diets with 1, 2, 3, 4, or 5% inclusion of the mixed protein hydrolysate. Significant effects were observed regarding the animals' final length, with higher values with the 1% inclusion level than the negative control. The liver's quantitative evaluation revealed that inclusions above 3% might lead to severe alterations in the organ's morphology. The use of PHPPL in the diets that did not contain fishmeal has shown to be effective in maintaining the performance parameters of Nile tilapia. Thus, its use is recommended considering an inclusion level of 3%.