Influência de fatores abióticos sobre a maturação dos ovários de Pimelodus maculatus Lac. 1803 (Pisces, Siluroidei)

Abstract

The purpose of the present paper is to establish correlations between some abiotic factors and the maturity of the ovaries of P. maculatus, expressed by means of the I. G. S. It was found a close positive correlation between the I. G. S. and rainfall. It was also observed that there are influence of the temperature of the water and water river level on the maturationand spawning processes of this species.