Effect of steel wire and claw size on the sea snail ( Rapana venosa ) catch in a Black Sea beam trawl fishery

Authors : Muharrem Hakan KAYKAÇ, Aysun GÜMÜŞ, Mustafa ZENGİN, Serdar SÜER, Melih RÜZGAR, Ayşe VAN, Zafer TOSUNOĞLU

Pages : 251-258

View : 17 | Download : 8

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :  The effects of the claw size used on the shoes of the traditional sea snail beam trawl and the effect of the steel wire used between the shoes on catching efficiency were investigated on the Samsun coast of the Black Sea. A traditional beam trawl with steel wire and with a claw length of 5.5 cm insert ignore into journalissuearticles values(T); was compared to modified beam trawls with steel wire insert ignore into journalissuearticles values(M1); and without steel wire insert ignore into journalissuearticles values(M2); with a claw size of 0.5 cm. The operations were performed as T-M1 and then T-M2 hauls using the dual parallel towing method. There was no significant difference in the amount of target species in the comparison of T insert ignore into journalissuearticles values(70.12); and M1 insert ignore into journalissuearticles values(63.23); according to the average catch per unit effort insert ignore into journalissuearticles values(CPUE, kg h ?1 ); values obtained insert ignore into journalissuearticles values(P = 0.399);. In the T-M2 comparison, 49% higher CPUE value was achieved with the T insert ignore into journalissuearticles values(77.37); beam trawl and there was a significant difference in terms of targeted species insert ignore into journalissuearticles values(P = 0.002);. As a result, it was observed by underwater observations that steel wire on the beam trawl had a negative effect on the ground, and it was found that the bycatch ratio with the T beam trawl was higher than that with the modified beam trawl.
Keywords : Sea snail, beam trawl, catch per unit effort, Black Sea