COMPARISON OF NIGHT-DAYTIME CATCH EFFICIENCY AND SIZE COMPOSITION OF MIDWATER TRAWL IN ANCHOVY (Engraulis encrasicolus L.) FISHING

In the study, which is carried out in Middle Black Sea coast, changing of night and daytime of catch efficiency of midwater trawl used on anchovy fishery, were compared. Total 19 tows having 8 night tows and 11 daily tows were operated. Anchovy were caught total 48048 kg at night and 25400 kg at daytime tows and means weight was 6005±1060.09 kg 2309±472.02 kg, respectively. Difference between means catch quantity was significant according to results “t” test (p<0.05). Means total size of anchovy caught at daytime and night was 11.2±0.07 cm and 10.3±0.06 cm, respectively and statistical difference between means size was significant (p<0.05). According to results, anchovy were more caught at night than at daytime. Although anchovy were less caught at daytime, its means size was determined higher. Conclusion, rarely school forming at daytime raising the midwater trawl selection was reached

Orta Karadeniz bölgesinde yürütülen bu çalışmada hamsi avcılığında kullanılan ortasu trolü av verimi ve boy kompozisyonunun gece ve gündüz değişimi karşılaştırılmıştır. Toplam 19 ağ çekiminden 8’i gece 11’i gündüz uygulanmıştır. Gece toplam 48048 kg ve operasyon başına ortalama 6005±1060.09 kg hamsi avlanırken, gündüz ise 25400 kg ve ortalama 2309±472.02 kg hamsi avlanmıştır. Yapılan “t” testi sonucunda ortalama av miktarları arasında gözlenen farkın önemli (p