Endemik Bir Balık Türü Olan Aphanıus Vıllwockı' nin Özdere (Sakarya Nehri Havzası ) Populasyonunun Büyüme ve Üreme Özellikleri
Özet
Aphanius, which belongs to Cyprinodontidae family, has been accepted as one of the oldest secondary fresh water fish in Anatolia that is represented by 9 different species in Turkey. In the presented study, growth and reproduction properties of Aphanius villwocki population in the Özdere (Polatlı-Ankara) were analyzed. This presented study is the first study on biology of Aphanius villwocki, a species of Aphanius which is endemic in Upper Sakarya River Basin. Under these circumstances, field studies were conducted in monthly basis between June 2012 – July 2013 and in total, 1793 individuals were collected and their sex were determined, 718 of this sample were dissected and their gonads were removed and weighted. The distribution of length, weight, age and sex, length-weight, age- length, age-weight relationships, condition factor of the population and the von Bertalanffy growth parameters of the specimens were examined.