Hematological parameters of Pimelodus maculatus em local poluido e nao poluido no rio Itajai-Acu, Estado de Santa Catarina, Brasil

• Published in: Acta scientiarum. Biological sciences Vol. 31; no. 2; p. 179
• Main Authors: Jeronimo, Gabriela Tomas, Ma, Bachmann, Fernanda, Greinert-Goulart, Juliane Araujo, Schmitt-Junior, Ayrton Adao, Ghiraldelli, Luciana
• Format: Journal Article
• Language: Spanish
• Published: Universidade Estadual de Maringa 01.04.2009
• Subjects: Analysis; Cell research; Fishes; Lymphocytes; Pollution; Protection and preservation; Water quality
• ISSN: 1679-9283
• DOI: 10.4025/actascibiolsci.v31i2.3267

This study evaluated the hematological response of Pimelodus maculatus captured in two environments with different levels of pollution in the Itajai-Acu river, Santa Catarina State, southern Brazil. One of them, hereby named reference site, is a water captation site that supplies the city of Blumenau, in which the riparian forest is preserved and there is no sewage discharge. The other, denominated polluted site, is characterized by discharge of domestic sewage. After water quality analysis, fish were captured, transported to the laboratory and anesthetized for the hematological exam. In the polluted site, the most probable number of fecal coliforms and water transparency were respectively higher and lower than that observed at the reference site. The main results were an increased percentage of hematocrit and reduced numbers of lymphocytes and monocytes in the differential counting in fish from the polluted site. Red blood cells, total white blood cells and total counting of thrombocytes did not vary between environments. The number of neutrophils remained at high levels in fish from both environments. This study demonstrated that water quality might affect the hematological parameters in free-living fish. Key words: siluriform fish, hematology, sewage, water quality. Este estudo avaliou a resposta hematologica de Pimelodus maculatus capturado em dois ambientes com diferentes niveis de poluicao no rio Itajai-Acu, Estado de Santa Catarina, Sul do Brasil. Um deles e um local de captacao de agua para abastecimento da cidade de Blumenau, onde a mata ciliar e preservada e nao ha descarga de esgoto denominado de local referencia. O outro e caracterizado por descarga de esgoto domestico denominado local poluido. Apos a analise da qualidade da agua, os peixes foram capturados, transportados para o laboratorio e anestesiados para o exame hematologico. No local poluido, o numero mais provavel de coliformes fecais foi maior e a transparencia da agua menor do que o local sem a descarga de esgoto. Os principais resultados foram o aumento no percentual de hematocrito e a reducao no numero de linfocitos e monocitos na contagem diferencial de leucocitos nos peixes do local que recebia descarga de esgoto. Os numeros totais de eritrocitos, leucocitos e trombocitos nao foram diferentes entre os locais. O numero de neutrofilos foi mantido alto nos peixes dos dois ambientes. Este estudo demonstrou que a qualidade da agua influencia os parametros hematologicos de peixes no ambiente natural. Palavras-chave: peixe siluriforme, hematologia, esgoto, qualidade de agua.