Some Biological Properties of the Leuciscus cephalus (L., 1758) Population Living in Karakaya Dam Lake in Malatya (Turkey)

Authors : Ercan KALKAN, Muhittin YILMAZ, A Ümit ERDEMLİ

Pages : 49-58

View : 121 | Download : 11

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :The sex distribution, growth in length and weight, growth rates and condition factors of Chub insert ignore into journalissuearticles values(Leuciscus cephalus insert ignore into journalissuearticles values(L., 1758);); in Karakaya dam lake were examined. Females made up 63.64% and males 36.37% insert ignore into journalissuearticles values(1.75:1); of 527 samples. The females and males were in the I-VI and I-V age groups, respectively. The reproductive properties of L. cephalus such as spawning period, age at attainment of maturity, egg diameter and ovarium weight were investigated. Student`s t test showed that differences in length and weight between females and males of the same age groups were statistically insignificant insert ignore into journalissuearticles values(P > 0.05);. The growth, both in length and weight, was calculated according to the von Bertalanffy equation for females and males respectively: Lt = 37.8 [1-e-0.4125insert ignore into journalissuearticles values(t-insert ignore into journalissuearticles values(-1.0013););], Wt = 775.3 [1-e-0.4125insert ignore into journalissuearticles values(t-insert ignore into journalissuearticles values(-1.0013););]3.0272 and Lt = 35.45 [1-e-0.6062insert ignore into journalissuearticles values(t-insert ignore into journalissuearticles values(-0.1883););], Wt = 590.5 [1-e-0.6062insert ignore into journalissuearticles values(t-insert ignore into journalissuearticles values(-0.1883););]2.4878. The calculated length-weight relation for females was W = 0.013 L 3.0272 and for males W = 0.0824 L2.4878. The average condition factor was 1.42 ± 0.05 for females and 1.43 ± 0.25 for males. According to gonado-somatic index insert ignore into journalissuearticles values(IG); results and the development of egg diameter, it was determined that the spawning period of L. cephalus occurs in May and June. Sexual maturity was attained in the third year. The mean diameter of ripe eggs was 1.06 mm and the mean number of eggs per gram of gonads was 1265.
Keywords : Leuciscus cephalus, growth, von Bertalanffy`s parameters, length and weight relationships, condition factor, sexual maturity, spawning period, Karakaya dam lake