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Effects of terrestrial animal by-products on gene expression of appetite hormones in dourado Salminus brasiliensis and on grow performance, tissue lipid composition, hematology, immunology and gene expression of appetite hormones in salmon Salmo salar

Grant number: 18/09303-0
Support type:Scholarships abroad - Research Internship - Post-doctor
Effective date (Start): March 01, 2019
Effective date (End): February 27, 2020
Field of knowledge:Agronomical Sciences - Fishery Resources and Fishery Engineering - Aquaculture
Principal Investigator:José Eurico Possebon Cyrino
Grantee:Evandro Kleber Lorenz
Supervisor abroad: Christopher Parrish
Home Institution: Escola Superior de Agricultura Luiz de Queiroz (ESALQ). Universidade de São Paulo (USP). Piracicaba , SP, Brazil
Research place: Memorial University of Newfoundland (MUN), Canada  
Associated to the scholarship:17/05606-5 - Swine liver hydrolyzate as animal source in carnivorous fish production - Productive, molecular and physiological effect, BP.PD

Abstract

Aquaculture is the most successful zootechnical activity in world during the last decade, leveraging the jobs supply, income generation and the feed industry. Food is responsible for approximately 60% of the total production costs and the reduction of its economic impact depends on the choice of the ingredients in order to optimize the production, aiming at the greater use of the nutrients at the lowest cost of production taking into consideration water quality and farmed animals health. The diets used to feed carnivorous fish are generally abundant in crude protein and are often dependent on fishmeal [FM] - an ingredient in scarcity and at a high cost. The substitution of FM by protein hydrolysates of terrestrial origin in diets for carnivorous fish can be an important alternative for the optimization of production and the reduction of fishery exploitation. However, in the few studies carried out with hydrolysates uses mostly fishery residues and with few aproach on the influence of these ingredients on the intestinal epithelium, body composition or hormonal activity of appetite in fish. This project aims to determine how different dietary inclusion of swine liver hydrolysate influence the gene expression of appetite hormones in dourado Salminus brasiliensis and the grow performance, lipid tissue composition, hematology and gene expression of appetite hormones salmon Salmo salar. The trial of dourado grow performance and hematology is occurring in the Laboratório de Nutrição de Peixes at Esalq (Piracicaba, Brazil) and it is described in the Brazil research grant proposal (grant 2017/05606-5). The dourado gene expression analysis (appetite hormones) will be realized in the "Department of Biology, Memorial University of Newfoundland, St. John's, NL, A1B3X9, Canada" under supervision of professor Hélène Volkoff. The trial of salmon grow performance, lipid composition, gene expression, hematology and immunology will be realized at Ocean Science Centre of "Department of Ocean Sciences, Memorial University of Newfoundland, St. John's, NL, AX-4003, Canada", under coordination and supervision of professor Christopher Parrish. (AU)