Agroquímicos inibem resposta de cortisol e comunicação química de estresse em peixes

• Autor(a) principal: Koakoski, Gessi
• Data de Publicação: 2016
• Tipo de documento: Tese
• Idioma: por
• Título da fonte: Manancial - Repositório Digital da UFSM
• Texto Completo: http://repositorio.ufsm.br/handle/1/17691
• topic: Agroquímicos; Cortisol; Comunicação química; Estresse; Metirapona; Agrochemicals; Chemical; Communication; Stress; Metyrapone; CNPQ::CIENCIAS DA SAUDE::FARMACIA

Agrochemicals can interfere in the stress response in fish, physiologically compromising responses to common stressors in your environment. The objective of the study was to evaluate the stress response in fish against acute exposure to sublethal concentrations of chemicals and the ability to communicate chemically a stressful event. Four experiments were performed: 1. Test response to stress and chemical communication of stress; and persistence or recovery; survival and performance parameters; after acute exposure to sublethal concentrations of agrochemicals; 2. Chemical communication of stress; 3. Chemical communication with donors stress fish unable to increase cortisol. 4. Ability to communicate chemically a stressful event donors fish with the hypothalamus-pituitary-interrenal axis harmed by pesticides. With the results we observed chronic inhibition of the stress response, lower rate of survival, inhibition of cortisol response and chemical communication of fish exposed to agrochemicals, even with donors fish unable to raise cortisol, donors fish reported stress to target fish, not depending on the cortisol increase but need activation of the hypothalamus-pituitary-interrenal axis.