Predator control in Fisheries: Assessment of predator-induced biological changes in cultured Nile Tilapia

• Grant number: 16/19518-8
• Support Opportunities: Regular Research Grants
• Start date: October 01, 2017
• End date: September 30, 2019
• Field of knowledge: Agronomical Sciences - Fishery Resources and Fishery Engineering - Aquaculture
• Principal Investigator: Rodrigo Egydio Barreto
• Grantee: Rodrigo Egydio Barreto
• Host Institution: Centro de Aquicultura (CAUNESP). Universidade Estadual Paulista (UNESP). Campus de Jaboticabal. Jaboticabal , SP, Brazil

Abstract

Fish farming systems are reasonably protected from lethal attacks from predators, but not in relation to non-lethal effects of such threat induced by chemical cues, as these cues freely circulate in cages. In this project, we focus on continuous effects of chemical cues that indicate that risk (alarm substances, disturbance substances kairomones and necromones) in variable of interest for livestocks (e.g. growth) and, if a possible effect take place, we will evaluate a possible connection with response to stress (cortisol). This is relevant because the continuous exposure to such stressors could induce morphological and functional changes in fish and therefore lead to the mobilization of energy and nutrients to anti-predator defenses, instead of muscle development (growth), which guides the animal production. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

CARNEIRO, VICTORIA CRISTINA LUCIFERO; DELICIO, HELTON CARLOS; BARRETO, RODRIGO EGYDIO. Effects of stress-associated odor on ventilation rate and feeding performance in Nile tilapia. JOURNAL OF APPLIED ANIMAL WELFARE SCIENCE, v. N/A, p. 11-pg., 2022-11-23. (16/19518-8)

ROZA E SILVA, MARIA LUIZA; PEREIRA, RAFAELA TORRES; ARVIGO, ALEXANDRE LUIZ; ZANUZZO, FABIO SABBADIN; BARRETO, RODRIGO EGYDIO. Effects of water flow on ventilation rate and plasma cortisol in Nile tilapia introduced into novel environment. AQUACULTURE REPORTS, v. 18, NOV 2020. (17/21594-7, 16/19518-8)