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Shaheena Shafi ¹, F. A. Bhat ², A. R. Yousuf ¹, Muni Parveen ³

Affiliations
1 Centre of Research for Development (CORD), University of Kashmir, Srinagar-190 006, J&K, IN
2 Division of Fishery Biology, SKUAST-K, Srinagar-190 006, J&K, IN
3 Department of Zoology, University of Kashmir, Srinagar-190 006, J&K, IN

Abstract

A total of 143 specimens of Cyprinus carpio communis were collected from Dal Lake, ranging in length from 144mm to 414mm, and in weight from 40g to 4450g. The length-weight relationship of the two sexes exhibited significant differences in growth co-efficient (b) and showed deviations from cube law (Male 'n' = 3.15 and Female 'n' = 2.80). Gut contents of the fish revealed that on an average, decayed organic matter (detritus) formed 45% of total food, while the remaining food consisted of both plant and animal matter. Arthropods and macrophytes formed the main or basic food, whereas, oligochaetes, protozoa, rotifers and algae constituted its secondary food. The molluscan and fish remains formed the incidental food. On the basis of gut content analysis, the fish was designated as detri-omnivore. Gastrosomatic index (Ga.S.I.) recorded highest value in July, while lower values were recorded in February. Condition factor (Kn) recorded highest value during March in both the sexes. Condition factor as well as gastrosomatic index exhibited a decreasing trend from higher length groups to smaller ones. Absolute fecundity of the fish varied from 3173 to 629230 and the relative fecundity fluctuated in the range of 21-230 with a mean value of 91.17. The largest length group exhibited higher fecundity than smaller ones, and its Go.S.I indicated the fish to be spring breeder.

Keywords

Cyprinus carpio communis, Food and Feeding Habits, Length-Weight Relationship, Fecundity, Gastrosomatic Index, Gonadosomatic Index.

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Shaheena Shafi , A. R. Yousuf , Muni Parveen

Abstract

The length-weight relationship and fecundity of Puntius conchonius were investigated on samples collected from Dal Lake, Kashmir. The analysis of this fish species was based on 150 specimens ranging in size from 38mm to 84mm and in weight from 1.42g to 10.712g. The regression values obtained for male, female and for pooled sexes (2.97, 2.93 and 2.94). The regression co-efficient was found to depart significantly from the cubic value. The computed value of correlation coefficient (r) for males, females and pooled ones were as r=9.22, r=9.36 and r=9.35 respectively, which were closer to 1 indicating that there is high positive correlation between the two variables i.e.length and weight.
The fecundity studies on Puntius conchonius revealed that there is a relationship between length of the fish with fecundity, weight of the fish and ovary with fecundity. The length and fecundity exhibited a straight line relationship between fecundity and body weight. Fecundity and ovary weight also exhibited linear relationship.

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