Efeito do ambiente alterado no epitélio da escama, nas brânquias e na alimentação de Prochilodus lineatus

• Autor(a) principal: Alves, Rebeca Mamede da Silva [UNESP]
• Data de Publicação: 2015
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://hdl.handle.net/11449/123722; http://www.athena.biblioteca.unesp.br/exlibris/bd/cathedra/29-05-2015/000833278.pdf
• topic: Fishes; Peixe; Morfologia (Animais); Peixes - Efeito da poluição; Exposição a agentes biológicos; Indicadores (Biologia); Marcadores biologicos

Global pollution has turned our attention to assessing lethal and sublethal effects of toxic agents using the most informative techniques possible. We must seek non-invasive or non-lethal sampling methods which represent an attractive alternative to traditional techniques of environmental assessment in fish. Find techniques that allow identification of toxic effects in several levels of biological organization, providing a broad view of the consequences of toxicant exposure. Keeping in mind that detergents are a common contaminant in water bodies and that LAS (Linear Alkylbenzene Sulfonate) is one of the most commonly used anionic surfactant on the market, our project attempts to study morphological alterations (histological, histochemical and ultrastructural) of the scale epithelium of Prochilodus lineatus exposed to two concentrations of LAS. We also wish to evaluate relative sensibility and ecological relevance of such effects comparing them to effects upon feeding rates and brachial morphology and establish morphological analysis of the scale epithelium as a new non-lethal environmental assessment technique that is reliable and comparable to classic methods. Results show that exposure to higher doses of surfactant caused severe damage to gill tissue, although lower doses also affected the organ. Epithelium morphology was also altered in response to LAS, but feeding experiments showed no alterations in feeding rates. Thus, scale epithelium sensibility compared to traditional methods makes it a potentially reliable environmental marker in fish