A Comparative Study on Some Biological Parameters in Wild and Farmed Common Carp (Cyprinus carpio)

Subject Areas : Journal of Animal Biology

سکینه  یگانه ¹ (دانشگاه علوم کشاورزی و منابع طبیعی ساری، دانشکده علوم دامی و شیلات، گروه شیلات، صندوق پستی 578، ساری، ایران)
سیده زینب  عابدی ² (دانشگاه علوم کشاورزی و منابع طبیعی ساری، دانشکده علوم دامی و شیلات، گروه شیلات، صندوق پستی 578، ساری، ایران)
حسین  رحمانی ³ (دانشگاه علوم کشاورزی و منابع طبیعی ساری، دانشکده علوم دامی و شیلات، گروه شیلات، صندوق پستی 578، ساری، ایران)

Received: 2014-06-21 Accepted : 2017-05-21 Published : 2013-04-21

Keywords: gonadosomatic index, Farmed Common Carp, Wild Common Carp, Correlation index, Line slope, Growth pattern,

Abstract :

In this research, gonadosomatic index (GSI), growth pattern, condition factor (CF), and length-weight regression relationship (LWR) in farmed and wild Common carp (Cyprinus carpio) were investigated. In order to establish baseline for research, 85 wild and farmed common carp were prepared during the different season of the year (averagely 10 farmed and 10 wild fish per each season). The results showed that the CF in farmed Common carp was higher than wild carp. GSI didnand#39;t show any significant differences between wild and farmed Common carp (Pandgt; 0.05). The seasonal variation of GSI had significant differences between 2 groups (Pandlt; 0.05). Correlation index or LWR in wild carp (W=3.391 L 0.78) was higher than farmed carp (W= 2.679 L0.7) (Pandlt; 0.05). The line slope of farmed and wild carp were ln W= 2.68 ln L -3.738 and ln W= 3.391 ln L -5.65, respectively. In this study, growth estimates of wild and farmed common carp showed an Isometric pattern. The increasing trend of wild and farmed carpand#39;s GSI during summer to spring was according to spawning period of this fish.