DETERMINING MONOFILAMENT GILLNET OPTIMUM MESH SIZE TO MITIGATE Amphilophus citrinellus POPULATION OUTBREAKS IN IR.H.DJUANDA RESERVOIR
Abstract: Gillnet is the most
common fishing gear used by fishers in Ir. H. Djuanda Reservoir. Currently,
gillnet catches are dominated by midas cichlid (Amphilophus citrinellus) which
is not the main target catch. To some extent, their presence is even considered
intrusive by the fishers. The aim of this study is to reveal the optimum
gillnet mesh size in catching this alien species, which in turn can be useful
to control the fish population in Ir. H. Djuanda Reservoir. The study was
conducted from August 2011 to January 2012. The mesh size of the gillnets were 1,
1.5, 2, 2.5, 3, and 3.5 inches. The total midas cichlid caught were 628 fish
which were mostly caught in 1.5 inches sized gillnet. Length first mature fish
is 13.31 cm. The optimum size of fish caught in the mesh of 1.5, 2, 2.5, 3, and
3.5 inches are 9.7, 12.9, 16.2, 19.4, and 22.6 cm, respectively.
Keywords: Selectivity;
gillnet; midas cichlid; Ir. H. Djuanda Reservoir
Author: Prawira A.R.P.
Tampubolon, Imanda Hikmat Pradana, Andri Warsa
Journal Code: jpperikanangg150048
