Growth and reproduction of por' s goatfish (Upeneus pori Ben-Tuvia and Golani, 1989) in İskenderun bay, the Eastern Mediterranean

iskenderun Körfezi'nden (Doğu Akdeniz) örneklenen Nil Barbununun (Upeneus pon) yaş dağılımı, büyüme verileri, yumurtlama zamanı, eşey oranları, ilk cinsi olgunluğa erişme boylan ve yumurta verimliliği (F) araştırılmıştır. Örneklerin % 52,6'nı dişiler, % 47,4'ünü erkekler oluşturmuştur. Dişilerin total boyu 7,0 ile 17,0 cm arasında, erkeklerin ki ise 6,6 ile 15,1 cm arasında değişim göstermektedir. Erkek ve dişilerin boy (L) ve ağırlık (W) ilişkisi sırasıyla W = 0,0108*L2" veW = 0,0097*L303 olarak saptanmıştır. Otolitlerden elde edilen yaş verileri von Bertalanffy büyüme verilerinin tahmininde kullanılmıştır. Buna göre hesaplanan veriler; !,,„= 19,1 cm, K = 0,360, to = -0,812 dir. En yüksek yaş, dişiler için 5. erkekler için 4 olarak belirlenmiştir. Erkek ve dişilerin yaş dağılımında 2. yaş grubu baskın bulunmuştur, ilk eşeysel olgunluğa, erkekler ve dişiler 10 cm total boyda ulaşmaktadır. Aylık gonadosomatik indeks değerleri, yumurtlama zamanının yoğun olarak Mayıs ve Temmuz ayları arasında olduğunu göstermiştir. Yumurta verimliliği (F) - boy ilişkisi, logF = -0,733 + 3,46logL (r = 0.81) olarak saptanmıştır.

İskenderun Körfezi' nde (Doğu Akdeniz) Nil Barbunun (Upeneus pori Ben-Tuvia and Golani, 1989) büyüme ve üreme özellikleri

The age composition, growth parameters, spawning season, sex ratio, length at first sexual maturity and fecundity of por's goatfish (Upeneus pon) caught from the Bay of iskenderun in the eastern Mediterranean Sea were investigated. Females and males made up 52.6% and 47.4%, respectively, of the particular population of the species. The total length of females ranged from 7.0 cm to 17.0 cm, and of males from 6.6 cm to 15.1 cm. The length (L) - weight (W) relationships for males and females were estimated as W = 0.0108*L2" and W = 0.00971303, respectively. The age data derived from otolith readings were used to estimate the growth parameters of the von Bertalanffy equation. The estimated parameters were: LM =19.1 cm, K = 0.360 and t0 = -0.812. The maximum age was 5 for females and 4 for males. The 2-year age group was dominant in both females and males. Males and females matured at a total length of 10 cm. The monthly values of the gonadosomatic index indicated that spawning occurred mainly between May and July. The fecundity (F) - length relationship was logF = 0.733 + 3.46logL (r = 0.81).

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