Data/hora: 09/06/2024 16:36:31

Provedor de dados: 	Neotropical Ichthyology	
País: 	Brazil	
Título: 	Repeated stressors do not provoke habituation or accumulation of the stress response in the catfish Rhamdia quelen	
Autores: 	Koakoski,Gessi; Kreutz,Luiz Carlos; Fagundes,Michele; Oliveira,Thiago Acosta; Ferreira,Daiane; Rosa,João Gabriel Santos da; Barcellos,Leonardo José Gil.	
Data: 	2013-06-01	
Ano: 	2013	
Palavras-chave: 	Cumulative stress; HPI axis; Jundiá; Silver catfish.	
Resumo: 	Fish repeatedly experience stressful situations under experimental and aquaculture conditions, even in their natural habitat. Fish submitted to sequential stressors can exhibit accumulation or habituation on its cortisol response. We posed a central question about the cortisol response profiles after exposure to successive acute stressors of a similar and different nature in Rhamdia quelen. We have shown that successive acute stressors delivered with 12-h, 48-h, and 1-week intervals provoked similar cortisol responses in juvenile R. quelen, without any habituation or accumulation. The cumulative stress response is more associated to short acute stressors with very short intervals of minutes to hours. In our work, we used an interval as short as 12h, and no cumulative response was found. However, if the length of time between stressors is of a day or week as used in our work the most common and an expected phenomenon is the attenuation of the response. Thus, also, the absence of both accumulation of the stress response and the expected habituation is an intriguing result. Our results show that R. quelen does not show habituation or accumulation in its stress responses to repeated stressors, as reported for other fish species	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252013000200453	
Editor: 	Sociedade Brasileira de Ictiologia	
Relação: 	10.1590/S1679-62252013005000010	
Formato: 	text/html	
Fonte: 	Neotropical Ichthyology  v.11 n.2 2013	
Fonte: 	info:eu-repo/semantics/openAccess