( Selective catching of pirambeba, Serrasalmus spilopleura Kner, 1859 (Pisces Cypriniformes), by employnng monofilament Gill nets )

Abstract

This paper intends to determine the selectivity curve of gill nets used to cate h the Brazilian freshwater fish "Pirambeba" (Serrasalmus spilopleura), according to Gulland (1969). The result is:

C*(L)= e^{-0.1342(L í  1.1047 m)2}

Where:

c*(L) = relative frequency of retention

L = total length of the fish

m = internal perimeter of the mesh.

It was also noticed that the best result for catching this species employing gill nets were obtained in the Summer season and at 0 m-3 m depth.