Orta Ege Denizi kırma mercan balığı’nın (Pagellus erythrinus (Linnaeus, 1758)) biyolojik özellikleri

Bu çalışmada İzmir Körfezi kırma mercan stoğuna ait; boy dağılımı, cinsiyet oranı, cinsiyet dönüşüm boyu, boyağırlık ilişkisi, yaş, büyüme, yumurtlama zamanı, ilk üreme yaşı ve boyu incelenmiştir. Toplamda 2654 adet kırma mercan bireyi Ocak 2002 - Haziran 2007 tarihleri arasında İzmir Körfezi’nden dip trol ile örneklenmiştir. Örneklerin, 4,1 (0,95 gr, Şubat) ile 27,8 cm (207,30 gr, Nisan) total boyları arasında dağılım gösterdikleri tespit edilmiştir. Bireylerin; %64,7’sinin dişi, %5,1’inin erkek, %0,3’ünün hermafrodit, %29,9’unun ise cinsi olgunluğa ulaşmamış bireylerden oluştuğu tespit edilmiş olup, stoğa ait cinsiyet oranı 1:0,08 olarak hesaplanmıştır. Örneklerin, 1 ile 10 yaşları arasında dağılım gösterdiği tespit edilmiştir. Tüm bireylere ait boy-ağırlık ilişkisi ve von Bertalanff y büyüme eşitliği W = 0,0143L2,95 ve Lt = 30,673[1 – e–0,165(t – (–0,857))] olarak hesaplanmıştır. Yumurtlamanın Haziran ayında başladığı ve Ekim’e kadar sürdüğü gözlenmiştir. Dişi ve erkek bireyler için ilk üreme boyunun sırasıyla 11,30 ve 15,08 cm total boy olduğu hesaplanmıştır.

Biological characteristics of the common pandora, Pagellus erythrinus (Linnaeus, 1758), in the central Aegean Sea

We investigated the length distribution, sex ratio, sex inversion length, length-weight relationship, age, growth, spawning period, age and length at first maturity of the common pandora inhabiting İzmir Bay. A total of 2654 common pandora were collected by trawl hauls of İzmir Bay (Turkey) between January 2002 and June 2007. The size of the samples ranged from 4.1 cm (0.95 g, February) to 27.8 cm (207.30 g, April) in total length. The samples were composed of 64.7% females, 5.1% males, 0.3% hermaphrodites, and 29.9% immature individuals, with a female to male ratio of 1:0.08. The age composition of the samples ranged between 1 and 10 years. The length-weight relationship and the von Bertalanffy growth function were estimated for all individuals as: W = 0.0143L2.95 and Lt = 30.673[1 - e-0.165(t - (-0.857))]. The spawning period started in June and continued until October. The total lengths at first maturity of females and males were 11.30 and 15.08 cm, respectively.

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Turkish Journal of Zoology-Cover
  • ISSN: 1300-0179
  • Yayın Aralığı: Yılda 6 Sayı
  • Yayıncı: TÜBİTAK
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