Birinci Zekiye ÖZDEMİR, Yakup ERDEM, Süleyman ÖZDEMİR, Hasan Hüseyin SATILNIŞ

Karadeniz'de ortasu trolü ile gece süresince avlanan hamsi (Engraulis encrasicolus L., 1758)' nin av verimi ve boy kompozisyonunun belirlenmesi

Bu çalışmada Karadeniz’de 2005–2006 avcılık sezonunda orta su trolü ile gece süresince avlanan hamsi av miktarı ve boy kompozisyonunun tespiti ele alınmıştır. Saat 17:00 den 04:00 e kadar olan zaman 17:00–20:00, 21:00–00:00 ve 01:00–04:00 olmak üzere üç farklı bölüme ayrılarak her bölüm için 6 şar ağ çekimi yapılmıştır. Araştırma süresince toplam 138180 kg balık avlanmış olup bunun 34560 kg I. periyotta, 66360 kg II. ve 37260 kg III. periyotta elde edilmiştir. Yakalanan tüm balıkların ortalama boyları 10,19±0,03 cm olarak belirlenirken I, II ve III. periyotta sırasıyla 10,26±0,05 cm; 9,89±0.04 cm ve 10,42 ±0,09 cm olarak tespit edilmiştir. Farklı zaman aralıklarında yapılan av operasyonları için av miktarları ve ortalama boylar arasındaki gözlenen fark istatistiksel olarak önemli (p

Determination of catch eficiency and lenght composition of anchovy (Engraulis encrasicolus L., 1758) caught by midwater trawl during nihgt in the Black Sea

Determination of catch eficiency and lenght composition of anchovy (Engraulis encrasicolus L., 1758) caught by midwater trawl during nihgt in the Black Sea. The aim of this study is to determine catch amount and size composition of anchovy in pelagic trawl along night time that carried out at fishing season 2005-2006 in Black sea. Night time was divided 3 periods as 17:00–20:00, 21:00–00:00 and 01:00–04:00, and was performed 6 tows for each period. Total 138 180 kg fish was fishing along study, I. period II. period and III. period 34 560 kg, 66 360 and 37 260 kg respectively. Mean size of all fishes caught 10,19±0,03 cm were determined, I. II. and III. period 10,26±0.05 cm; 9,89±0,04 cm and 10,42 ±0,09 cm respectively. Difference between Catch efficiency and mean size for fishing operation was done at different time periods was significantly (p

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