Selectivity of Multifilament Trammel Nets Used in Fishing of Prussian Carp, Carassius gibelio (Bloch, 1782) in Lake Eğirdir

In this study, it has been investigated that the characteristics of the selectivity of multifilament trammel nets having 50, 55, 60 mm bar length. this study was carried out on prussian carp carassius gibelio (bloch,1782) caught in lake eğirdir. an indirect method developed by holt [1] was used for determining the selectivity parameters. common selection factor as sf=5.069 and common standard deviation as sd=1.855 were calculated for multifilament trammel nets. common selection factor used of the optimum catch lengths of prussian carp in 50, 55 and 60 mm bar length were 25.35; 27.88 and 30.42 cm respectively. the optimum catching lengths were compared with lenghts at first maturity of prussian carp in lake eğirdir. trammel nets of this study do not cause the overfishing on the prussian carp stock.