Effects of predator odour on antipredator responses of Nile tilapia

Author(s)

Miyai, Caio Akira ; Carretero Sanches, Fabio Henrique ; Pinho-Neto, Candido Ferreira ; Barreto, Rodrigo Egydio

• Document type: Journal article
• Source: Physiology & Behavior; v. 165, p. 22-27, OCT 15 2016.
• Web of Science Citations: 6

Abstract

Several fish species.exhibit antipredator responses when exposed to chemicals which indicate risk of predation. One such substance is the scent of a predator (a kairomone) that may induce defensive responses in a potential prey. In the present study, we show that chemical cues (odour) from predator fish induce antipredator and stress responses in Nile tilapia. When exposed to predator odour, Nile tilapia decreased activity and increased ventilation rate (VR), but no increase in plasma levels of cortisol and glucose was found, Although the hypothalamic-pituitary-interrenal axis (HPI axis) was not activated, an increase in ventilation is a fast response which can provide the fish enough oxygen for a `fight or flight' event when facing a predator. Thus, this respiratory response suggests an anticipated adjustment in order to prepare the body for a defensive response, such as escaping, irrespective of HPI axis activation. (C) 2016 Elsevier Inc. All rights reserved. (AU)

• FAPESP's process: 11/03216-9 - Analyses of physiological and behavioral responses of Nile tilapia exposed to predator odor
• Grantee: Caio Akira Miyai
• Support Opportunities: Scholarships in Brazil - Master
• FAPESP's process: 10/11319-0 - Chemical signalling during predator-prey relationship in the Nile Tilapia: from behavioural ecology to aquaculture
• Grantee: Rodrigo Egydio Barreto
• Support Opportunities: Regular Research Grants