Determination of size selectivity of traps for blue crab (Callinectes sapidus Rathbun, 1896) in the mediterranean sea Akdenizde mavi yengeç (Callinectes sapidus Rathbun, 1896) Tuzaklarının boy seçiciliğinin Belirlenmesi


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Özdemir S., GÖKÇE G., Çekiç M.

Tarim Bilimleri Dergisi, cilt.21, sa.2, ss.256-261, 2015 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 21 Sayı: 2
  • Basım Tarihi: 2015
  • Doi Numarası: 10.15832/tbd.50094
  • Dergi Adı: Tarim Bilimleri Dergisi
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, TR DİZİN (ULAKBİM)
  • Sayfa Sayıları: ss.256-261
  • Anahtar Kelimeler: Blue crab Callinectes sapidus, Mediterranean sea, Size selectivity, Trap
  • Hatay Mustafa Kemal Üniversitesi Adresli: Hayır

Özet

This study investigates the effects of trap selectivity of various mesh size on escape success of the blue crab (Callinectes sapidus). The study was carried out Çamlık Lagoon of Yumurtalık Gulf in the Mediterranean Sea and total of 1051 blue crabs were caught by rectangular baited trap. Using traps constructed with 30, 35, 40, 45 and 50 mm square mesh the proportion of crabs escaping through each mesh size was measured for each half centimetre carapace width (CW) class. A logistic model was fitted to the size frequency data of the retained and escaped blue crabs for each mesh size in the experiment. L50 and selection range (SR) for the 30, 35, 40, 45 and 50 mm (bar length) square meshes tested in this study was 8.47 cm and 0.85 cm; 9.31 cm and 0.39 cm; 10.40 cm and 0.31 cm; 11.72 cm and 1.17 cm; 13.17 cm and 0.89 cm respectively. The 50 mm square mesh of the trap showed relatively better selectivity considering the size at 50% sexual maturity of blue crab Callinectes sapidus, and the high rate of immature escapers.