1. ORTASU TROLÜ İLE GÜNDÜZ İKİ FARKLI PERİYOTTA AVLANAN HAMSİ (Engraulis encrasicolus L.)'NİN AV VERİMİ VE BOY KOMPOZİSYONU.
- Author
-
ERDEM, Yakup, ÖZDEMİR, Süleyman, SATILMIŞ, Hasan Hüseyin, and ÖZDEMİR, Zekiye BİRİNCİ
- Subjects
- *
ICHTHYOLOGY , *CATCH effort in fishing , *FISH detection , *ANCHOVY fisheries , *FISHERY gear , *SIZE of fishes - Abstract
In this study was aimed to determine differences in school structure, size composition and catch efficiency between two periods of daytime. Total, I. period and II. period fish amount were caught 65800 kg, 43600 kg and 2200 kg respectively in the end 16 tows. As first part of day is the more yield than second part of day, difference between was significantly (p<0.05; t test). Mean total size of all fishes, at I. period and II. period was caught, 10.58±0.03 cm, 10.13±0.04 cm and 11.02±0.04 cm respectively in experiments and difference between mean sizes of fishes were caught at both periods was significantly (p<0,05). According to sonar observations and research results, different of anchovy school density and mean size of individual which was schooling in both periods was determined. By means of effective used of fish detection equipments could be effect fishing that forming from more size individuals were concluded. [ABSTRACT FROM AUTHOR]
- Published
- 2008