İskenderun Körfezi'nde dağılım gösteren kum yengeci (Portunus pelagicus (Linneaus, 1758) ve mavi yengeç (Callinectes sapidus Rathbun, 1896) populasyonları ve morfometrisi üzerinde araştırmalar

Bu çalışma ile İskenderun Körfezi’nden Temmuz 2002- Haziran 2003 tarihleri arsında elde edilen örnekler incelenerek Atlantik kökenli mavi yengeç ( Callinectes sapidus Rathbun, 1896) ve İndo-Pasifik kökenli kum yengeci (Portunus pelagicus Linneaus, 1758)’nin boy dağılımları, erkek-dişi oranları belirlenmiştir. Toplam 467 birey (139 adet mavi yengeç ve 328 adet kum yengeci) incelenmiştir. İskenderun Körfezi’ndeki kum yengeci populasyonunda %58 ile erkeklerin baskın olduğu, dişi bireylerin ortalama uzun karapas genişlikleri 119,9±2,8 mm genişliğinde, erkek bireylerin ortalama 104,9±2,1 mm uzun karapas genişliğinde oldukları belirlenmiştir. Mavi yengeç populasyonunda ise yaklaşık olarak populasyonun %69’unu dişi bireylerin oluşturduğu ve ortalama uzun karapas genişliği 148,9±2,5 mm, %31’ini oluşturan erkek bireylerin ise ortalama 123,3±3,4 mm uzun karapas genişliğinde oldukları belirlenmiştir.

Population biology of sand crab (Portunus pelagicus (Linneaus, 1758) and blue crab (Callinectes sapidus Rathbun, 1896) in İskenderun Bay.

Population biology of sand crab [Portunus pelagicus (Linneaus, 1758)] and blue crab [Callinectes sapidus Rathbun, 1896] in Iskenderun Bay. The Indo-Pacific originated sand crab [Portunus pelagicus (Linneaus, 1758) ] and Atlantic originated blue crab (Callinectes sapidus Rathbun, 1896) were observed in Iskenderun Bay between July 2002 and June 2003. The study was based on the comparison of length distribution and sex ratio of crabs. A total of 467 individuals (139 blue crabs and 328 sand crabs) were examined. The males of sand crab was determined to be dominant representing 58% of the population, and the average width of long carapace of females was found to be 119.9±2,8 mm, while the carapace width for males was 104,9±2,1 mm in average. The case seems to be contrast for blue crab female population, which was dominant with the proportion of 69% and average width of long carapace of them was found to be 148,9±2,5 mm. The average width of long carapace was 123,3±3,4 mm for males, which represented 31% of the total population.

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