Hematological and biochemical parameters for the pirarucu Arapaima gigas Schinz, 1822 (Osteoglossiformes, Arapaimatidae) in net cage culture.

 

M. Tavares-Dias1, J. F. M. Barcellos2, J.L. Marcon3,G. C. Menezes4, E.A. Ono4, E.G. Affonso4

 

1Institute of Health and Biotechnology, Federal University of Amazonas (UFAM), Coari, AM, Brazil

2Department of Physiological Sciences, Institute of Biological Sciences, Federal University of Amazonas (UFAM), Manaus, AM, Brazil.

3Department of Morphology, Institute of Biological Sciences, Federal University of Amazonas (UFAM), Manaus, AM, Brazil.

4Department of Aquaculture, Amazonian National Research Institute (INPA), Manaus, AM, Brazil.

 

Abstract: In the present work fish blood parameters such as erythrocytes, thrombocytes, leukocytes, electrolytes (Cl-, Na+, K+ and Ca+2) and metabolic products (total protein, glucose, urea, triglycerides and cholesterol) were measured in healthy Arapaima gigas, when kept in culture in Central Amazon. The mean standard deviation and range were established. Red blood cell indices of A. gigas indicate a high demand for oxygen with high carrying oxygen capacity. Hematological values reported in this work provide basic information on a species of increasing economic interest, and therefore these values may be a useful tool for the control of their state of health and nutritional conditions. Furthermore, comparisons of these results with those of wild A. gigas could help to better understand these parameters in natural populations.

 

Key Words: freshwater fish, haematology, Arapaima gigas, leukocytes, plasma chemistry

 

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