Title: Some Biological Properties of Chondrostoma regium (Heckel, 1843) in Gamasiab River in Kermanshah Province ,Iran
Abstract:In this study, age, growth and reproduction characteristics of 297 Chondrostoma regium fish (146 males and 151 females)from the Gamasiab River were investigated monthly between August 2011 to July 201...In this study, age, growth and reproduction characteristics of 297 Chondrostoma regium fish (146 males and 151 females)from the Gamasiab River were investigated monthly between August 2011 to July 2012. Age of captured fish ranged between 1 and 5. The age-length in females and males were estimated as; Lt=316[1-e-0/25(t+0/577)], Lt=306[1-e0/21(t+0/61)] respectively. The length-weight relationship for male and female individuals W=8×10-6 L3/05and W=6×10-5 L2/687. Mean GSI in female and male populations of Gamasiab River was 9.15±4.8, 1.5±1.13, respectively. Mean absolute fecundity in females was 9440.98±5011.88 .Mean egg diameter was 1.05±0.25 mm. In the analysis of fishes conditions factor the mean of it for male and female fishes were 1.042±0.17 and 0.99±0.14, respectively .The maximum condition factor for male and female was in Apr and Mar respectively. In according to GSI, absolute fecundity, egg diameters of Chondrostoma regium in Gamasiab River reproduction season was in March to May.Read More
Publication Year: 2014
Publication Date: 2014-01-01
Language: en
Type: article
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