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Reproductive Biology of Snow Trout Schizothorax plagiostomus

Reproductive Biology of Snow Trout Schizothorax plagiostomus

Arif Jan*, Abdul Rab, Haroon, Rooh Ullah, Tauheed Ullah and Ikram Ullah

Department of Zoology, Shaheed Benazir Bhutto University, Sheringal, Dir Upper

*     Corresponding author: arifjan@sbbu.edu.pk

 

ABSTRACT

Different aspects of reproductive biology of S. plagiostomus were studied in this work from February 2014 to January 2015. Fishes were collected from Sheringal valley right from Kumrat thal valley to Chukyatan Dir Upper. Fecundity and Gonado-somatic index was studied using gravimetric to infer about breeding season and reproductive potential. The mean value of absolute fecundity recorded was 14670.39 while mean value of relative fecundity was noted as 34.78. The mean value recorded for conditioned factor was 0.912 g/cm3. Relationship of fecundity with body length, body weight, ovary weight and the interrelationship of body length and body weight was established statistically using Linear Regression. The values of determination coefficient (R2) at P <0.001 for correlation between fecundity and body length, body weight and ovary length were recorded to be 0.8246, 0.8065 and 0.9120. The same value for association between body length and body weight was 0.9749. All the values are highly significant showing strong correlation. The GSI values ranged from 2 to 13.5. Highest value was observed in the month of March while lowest value is recorded in the month of April and October. Females to males ratio was found to be 1.04 (P>0.05). The study provides basic information about the reproductive potential and behavior of S. plagiostomus which will be handy towards its culture.
 

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Pakistan Journal of Zoology

December

Vol. 51, Iss. 6, Pages 1999-2399

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