Examine The Fecundity and Egg quality Connected to Biometrical Parameters of Female broad stocks of Rainbow Trout (Oncorhynchus mykiss) A case study in cold water fish reproduction center (shahid motahari in yasuj)

Subject Areas : environmental management

Hamid Reza Ahmadnia Motlagh ¹ , Yaser Tohidian Far ² , Mohamad Hossein Mohamadi Ashnani ³ , Mahmood Nafisi Bahabadi ⁴ , Mehdi Zare khafri ⁵

1 - PhD. student in Fishery, Faculty of Agriculture & Natural Resources, University of Gorgan
2 - M.sc in Environment Planning and Management, Faculty of Environment, University of Tehran
3 - PhD. student in Fishery, Faculty of Agriculture & Natural Resources, University of Gorgan
4 - Associate Professor, Fisheries Dept, Faculty of Agriculture & Natural Resources, Persian Gulf University
5 - BSc. in Fisheries, Faculty of Agriculture & Natural Resources, Persian Gulf University

Received: 2009-04-19 Accepted : 2009-12-16 Published : 2014-02-20

Keywords: fecundity - ova and egg - biom,

Abstract :

AbstractIn order to examine the fecundity and egg quality connected to biometrical parameters of femalebroad stocks of rainbow trout (Oncorhynchus mykiss) a case study in cold water fish reproductioncenter (shahid motahari in yasuj) was done. In this study broad stocks were 2-7 years and 0/78-3/02kgweight. Sampling was done in 3 times and in each time 27 broad stocks were examined.Length, weight, total fecundity egg size and egg diameter of each broad stock were measured.The relation between length, weight and age of broad stocks with fecundity, ova and egg quality wasapplied by Microsoft SPSS Version 14.Results showed a direct relation between broad stocks age, length and weight with relative fecundity(P<0/05). There was a meaningless relation between age of broad stocks with relative fecundity andalso age, length and weight of broad stocks with egg diameter. Based on this study, with increasing theweight and length of broad stocks, total fecundity was increased and relative fecundity was decreased.Average of relative fecundity in elder broad stocks decreased. Our study showed that broad stockswith 40cm length and weight of 1-1/5kg are better than other broad stocks for reproduction.

References:

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