Death-associated odors induce stress in zebrafish
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Data
2014-04-01
Autores
Oliveira, Thiago Acosta
Koakoski, Gessi
Motta, Adriana Costa da
Piato, Angelo Luis
Barreto, Rodrigo Egydio [UNESP]
Volpato, Gilson Luiz [UNESP]
Gil Barcellos, Leonardo Jose
Título da Revista
ISSN da Revista
Título de Volume
Editor
Elsevier B.V.
Resumo
Living animals exploit information released from dead animals to conduct adaptive biological responses. For instance, a recently published study has shown that avoidance behavior is triggered by death-associated odors in zebrafish. Stress can clearly act as an adaptive response that allows an organism to deal with an imminent threat. However, it has not been demonstrated whether these chemical cues are stressful for fish. Here, we confirmed that dead zebrafish scents induce defensive behavior in live conspecifics. Additionally, we show for the first time in fish that these scents increase cortisol in conspecifics. To reach this conclusion, firstly, we exposed zebrafish to multi-sensorial cues (e.g., visual, tactile, chemical cues) from dead conspecifics that displayed defensive behaviors and increased cortisol. Also, when we limited zebrafish to chemical cues from dead conspecifics, similar responses arose. These responses coincide with the decaying destruction of epidermal cells, indicating that defensive and stress responses could take place as an effect of substances emanating from decaying flesh, as well as alarm substance released due to rupture of epidermal cells. Taken together, these results illustrate that living zebrafish utilize cues from dead conspecific to avoid or to cope with danger and ensure survival. (C) 2014 Elsevier Inc. All rights reserved.
Descrição
Palavras-chave
Danio redo, Stress, Cortisol, Necrophobic behavior, Freezing
Como citar
Hormones And Behavior. San Diego: Academic Press Inc Elsevier Science, v. 65, n. 4, p. 340-344, 2014.