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Influence of seasonality and pollution on the hematological parameters of the estuarine fish Centropomus parallelus

This study investigated the hematological parameters of the tropical estuarine fish Centropomus parallelus and their use as a non-destructive biomarker for aquatic pollution. Individuals were collected, in summer and winter, at two estuaries, Cananéia (CAN) and São Vicente (SVE), and blood was extra...

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Published in:Brazilian journal of oceanography 2013-06, Vol.61 (2), p.105-111
Main Authors: Seriani, Robson, Abessa, Denis Moledo de Souza, Pereira, Camilo D. S., Kirschbaum, Aline A., Assunção, Andrea, Ranzani-Paiva, Maria José T.
Format: Article
Language:English
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Summary:This study investigated the hematological parameters of the tropical estuarine fish Centropomus parallelus and their use as a non-destructive biomarker for aquatic pollution. Individuals were collected, in summer and winter, at two estuaries, Cananéia (CAN) and São Vicente (SVE), and blood was extracted by caudal puncture. The evaluated parameters were hematocrit (Ht), red blood cells (RBC), Mean Corpuscular Volume (MCV), and the leukocyte (WBC) and thrombocyte counts. Fishes from CAN showed higher values of absolute number of thrombocytes in the summer. The fishes from SVE presented lower values of Ht and MCV in winter. Comparing the hematological parameters of fishes from these two sites, Ht, MCV, WBC and RBC were higher in fishes from SVE in the summer, whereas during the winter, Ht and thrombocytes were higher in animals from SVE. The results allow attributing the changes in the blood of fishes to seasonality and the presence of contaminants. No presente estudo, foram utilizados parâmetros hematológicos do peixe tropical estuarino Centropomus parallelus como biomarcador não destrutivo. Os peixes foram coletados, no verão e no inverno, em dois estuários: Cananéia (CAN) e São Vicente (SVE). Foram analisados: hematócrito (Ht), contagem de eritrócitos (RBC), volume corpuscular médio (VCM), leucograma (WBC) e trombograma. Os peixes de ambos locais apresentaram variações no quadro hematológico devido à sazonalidade e aos níveis de degradação ambiental. Os peixes de Cananéia apresentaram aumento no número absoluto de trombócitos no verão, enquanto aqueles coletados em São Vicente apresentaram hematócrito (Ht) e Volume Corpuscular Médio (MCV) menor no inverno. Comparando o quadro hematológico dos peixes dos dois estuários, observamos maiores valores de hematócrito (Ht), Volume Corpuscular Médio (MCV), leucócitos (WBC), e número de eritrócitos (RBC) nos peixes de São Vicente no verão, enquanto no inverno, Ht e trombócitos foram também maiores nos peixes desse local. Os resultados sugerem que as alterações observadas no quadro hematológico se deveram à qualidade ambiental dos estuários e à sazonalidade.
ISSN:1679-8759
1982-436X
1679-8759
DOI:10.1590/S1679-87592013000200003