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۱Comparative Study to Monitor the Survival and Growth of Varying Fish Species Ratios under the Same Stocking Density
اطلاعات انتشار: World Applied Sciences Journal، سي ام،شماره۱۲، ۲۰۱۴، سال
تعداد صفحات: ۷
The experiment was conducted to examine the effect of equal stocking density (180 fish\pond) with varying species ratios (90:60:30, 60:90:30 and 75:75:30) of Labeo rohita, Cirrhinus mrigala and Tilapia nilotica one (T1), two (T2) and three (T3), respectively for growth performance and survival rates. Fish species were fed once daily at the rate of 2% of body weight. Comparison of means revealed significantly higher average body weight in T1 (90.10 ±13.79 g) followed by T2 (74.07 ±13.01 g) and T3 (79.71 ±12.2 g), moreover analysis of a c b variance showed highly significant (p0.01) difference in body weight among treatments. The gross (2057.5 kg) and net (2002.2 kg) fish production\hectare\year was also higher in T1 than T2 and T3. Furthermore 90:60:30 stocking ratio in T1 was found most suitable compared to 60:90:30 in T2 and 75:75:30 in T3, for Labeo rohita, Cirrhinus mrigala and Tilapia nilotica. Hence, the present study showed that the optimal ratio of major carp to tilapia in polyculture can efficiently utilize available resources for maximum production.
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