Reproductive biology of Aphanius mento (Heckel in: Russegger, 1843) (Osteichthyes: Cyprinodontidae) in Kırkgöz Spring (Antalya-Turkey)

Bu çalışma Kırkgöz Kaynağı (Türkiye) (37º06' N; 30°35' E)’nda yaşayan Aphanius mento populasyonunun üreme özelliklerinin belirlenmesi amacıyla Ocak 2002-Aralık 2002 tarihleri arasında yapılmıştır. Çalışmada, populasyona ait bireylerin eşey ve yaş oranları, balık boyu, vücut ağırlığı ve gonad ağırlığı--yumurta verimliliği ilişkisi, gonadosomatik indeks, yumurta çapı, ilk üreme yaşı incelenmiştir. Populasyonun yaş aralığı 0-VII ve erkek: dişi oranı 1,10 : 1,00 (n=654)’dir. Üreme zamanı Mayıs-Temmuz ayları arasındadır. Populasyonun ilk üreme yaşı I ve dişi bireylerde ilk üreme boyu 2,45 cm olarak hesaplanmıştır. Bireylere ait ortalama yumurta verimliliği 228,48±28,60’dır. Ortalama yumurta çapı ise 1.240,09±53,26 μm olarak bulunmuştur.

Anahtar Kelimeler:

Türkiye, Cyprinodontidae, Antalya, üreme özellikleri, döllenme gücü, Osteichthyes

Kırkgöz Kaynağı (Antalya-Türkiye)’nda yaşayan Aphanius mento (Heckel in: Russegger, 1843) (Osteichthyes: Cyprinodontidae)’nun üreme biyolojisi

The reproduction of Aphanius mento is described from the Kırkgöz Spring (Turkey) (37º06' N; 30°35' E) between January 2002 and December 2002. In this study, the sex ratio, age, the relationship between fecundity and fish length, weight and gonad weight, the gonadosomatic index, egg diameter and the first age of maturation were observed. Age range was determined as 0-VII years for 654 individuals. The overall male to female ratio was 1.10 : 1.00. Spawning period was between May and July. The first maturation was found to be at age I. First maturity length (Lm) was estimated at 2.45 cm for females. The mean fecundity per individual was found to be 228.48±28.60. The mean egg diameter was calculated as 1,240.09±53.26 μm.

Keywords:

Turkey, Cyprinodontidae, Antalya, reproductive traits, fecundity, Osteichthyes,

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