Relative Body Size Relationship to Proximate Composition of Farmed Hypophthalmichthys nobilis from Bahawalnagar, Pakistan
Relative Body Size Relationship to Proximate Composition of Farmed Hypophthalmichthys nobilis from Bahawalnagar, Pakistan
Abir Ishtiaq1*, Abdul Ghaffar2, Maria Younas1, Tasveer Ishtiaq1, Zara Naeem3 and Muhammad Naeem4*
ABSTRACT
The objective of the study was to evaluate the proximate composition of Bighead carp, Hypophthalmichthys nobilis, from the farming system of Bahawalnagar, Pakistan, in relation to body size and condition factor. For this purpose, twenty-eight samples of H. nobilis, of different body size were procured from a private fish farm, for analysis of body composition parameters’ variables in relation to body size and condition factor. Mean body weight and total length was measured and condition factor of farmed collected fish was calculated as 556.45±28.24 g, 34.78±0.60 cm and 1.30±0.02, respectively. On wet weight basis, mean percentage for water, protein, fat and ash was found 74.70±0.76%, 16.92±0.66%, 4.60±0.16% and 3.78±0.12%, respectively, in H. nobilis. Highly significant (P<0.001) positive correlation was observed between fish size (weight and total length) and various body constituents of the fish. Positive allometry for all the studied constituents was found except for log total water content which represented negative allometric pattern with an increase in body size of farmed H. nobilis. Condition factor showed no significant correlation (P>0.05) with all the body constituents (%) in the bighead carp. % fat (wet weight) showed no significant correlation (P>0.05) with %water content while %protein, %ash and %organic content (wet weight) showed highly significant (P<0.001) negative correlation with %water content of farmed collected fish (H. nobilis). The study confirms that the predictive equations can be used to estimate values of body composition with a fair amount of accuracy. This study would be helpful for fisheries industry and consumers as the awareness about fish proximate composition is crucial for its maximal consumption.
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