Haematological features of <i>Porichthys porosissimus</i> (Pisces: Batrachoidiformes) from the Bahia Blanca estuary, Argentina

Ciertos componentes de la sangre de los peces son afectados por factores intrínsecos y extrínsecos, así como por particularidades fisiológicas de cada tronco filogenético, por lo que adquieren relevancia tanto fisiológica, como ecológica y evolutiva. El sedimento del estuario de Bahía Blanca comprende un ambiente sometido a una creciente presión de contaminación urbana e industrial. Con el propósito de caracterizar desde el punto de vista hematológico a un pez residente del bentos estuarial, fueron muestreados 32 ejemplares de P. porosissimus. En ellos se determinaron variables hematológicas, que fueron comparadas con peces de similares hábitos, en otros ecosistemas. Se describen seis tipos morfológicos celulares: eritrocitos, linfocitos, eosinófilos, neutrófilos, trombocitos y monocitos. Estos resultados permiten corroborar que P. porosissimus responde a las características hematológicas de los peces de hábitos bentónicos y sedentarios.Certain components of the fish blood are affected by intrinsic and extrinsic factors, as well as by physiological particularities of each phylogenetic trunk. By this reason they acquire physiological relevance, as ecological and evolutionary as much. The sediment of the estuary of Bahia Blanca comprises an environment supporting an increasing pressure of urban and industrial pollution. In order to characterize from the haematological point of view a resident fish of the estuarial benthos, 32 specimens of P. porosissimus were sampled. In addition, the concentrations of total proteins and albumin in the plasma of females in autumn and spring, were assessed. This information was compared with another teleost species with similar habits. Six morphologic cell types were identified: red blood cells, eosinophils, neutrophils, lymphocytes, trombocytes and monocytes. These results demostrated that P. porosissimus fit well to the haematologic features of fishes with benthonic and sedentary habits.Facultad de Ciencias Veterinaria