SELECTIVITY OF LESSEPSIAN FISH, RANDALL'S THREADFIN BREAM (NEMIPTERUS RANDALLI RUSSELL, 1986) IN THE GULF OF ANTALYA, EASTERN MEDITERRANEAN
SCIENTIFIC PAPERS-SERIES D-ANIMAL SCIENCE, vol.59, pp.330-335, 2016 (ESCI)
- Publication Type: Article / Article
- Volume: 59
- Publication Date: 2016
- Journal Name: SCIENTIFIC PAPERS-SERIES D-ANIMAL SCIENCE
- Journal Indexes: Emerging Sources Citation Index (ESCI)
- Page Numbers: pp.330-335
- Keywords: Size selectivity, Lessepsian, Randall's threadfin bream, Antalya gulf, Eastern Mediterranean, BOTTOM TRAWL SELECTIVITY, COD-END SELECTIVITY, AEGEAN SEA, PE MATERIAL, MESH, CODENDS, DESIGN, SQUARE, L.
- Akdeniz University Affiliated: Yes
Abstract
Size selectivity of sorting grid was studied for Randall's threadfin bream in the Gulf of Antalya, Mediterranean Sea. Trawling's were carried out in October - December 2012, with a traditional bottom trawl net (600 mesh around the mouth). The fish totally retained in upper codend (catches) and bottom codend (escapes) were used to estimate the selectivity. Selectivity data analyzed as covered cod-end method by means of a logit function of Maximum Likelihood Method. The Kolmogorov - Smirnov test (KS - test) was applied in order to determine the difference between size groups of escapes and catches codends. The percentages of the total catch in terms of weight were 68% retained and 32% escaped. Mean L-50 value of Randall's threadfin bream was calculated as 13.19 +/- 0.48 cm. Total weight of Randall's threadfin bream caught in hauls was 12.996 kg. The results confirm that using sorting grid fixed mesh codend gave higher L-50 value than size selectivity studies by using Hand-Woven Slack Knotted mesh codend.