Title :	GROWTH PERFORMANCE OF CARP FRY IN DIFFERENT DENSITY AND FEEDING MANAGEMENT IN LAKES OF POKHARA VALLEY
Material Type:	printed text
Authors:	Wagle, S.K., Author ; Prasad, S., Author
Pagination:	70-77 p.
Languages :	English (eng)
Abstract:	Improvement of nursery technology in floating net cages has become the primary concern to sustain availability of suitable fingerlings in time for cage fishery in the lakes of Pokhara valley. In· line with this, several experiments on growth and yield of carp fry in floating mtrsery cages with the effect of different density and feeding management were ·carried out. These studies focused on growth potential of lakes, season and fry density on the production of Silver carp (Hypophthalmicthys molitrix) and Bighead carp (Aristichthys nobilis) fingerlings. Water temperature was the most critical element in determining the growth of fry during winter season (October-January) in both Phewa and Begnas. lakes. The treatments' mean yield from density trial was 0.5, 1.0 and 1.5 kglm3 for Silver carp in lake Phewa, respectively for density 100, 300 and 500 tails/m3 . All the density treatment in Begnas resulted in loss of gross stocking weight at harvest. Fish fry of Aristichthys nobilis were stocked at densities of 250, 500, 1000 frylm3 of water volume. Fish fry were fed ad libitum for 120 days with a ration containing 19% protein. The absolute growth rate of fry was increased significantly (P dens;ties between each subperiod. The fry of Bighead carp showed highest net weight gain of 6.2 gljry for density 250 frylm3 followed by 5. 2 gljry for density 500 frylm3 . A high feed conversion ratio (FCR) associated with high dens{ty was observed

GROWTH PERFORMANCE OF CARP FRY IN DIFFERENT DENSITY AND FEEDING MANAGEMENT IN LAKES OF POKHARA VALLEY [printed text] / Wagle, S.K., Author ; Prasad, S., Author . - [s.d.] . - 70-77 p.
Languages : English (eng)

Abstract:

Improvement of nursery technology in floating net cages has become the primary concern to sustain availability of suitable fingerlings in time for cage fishery in the lakes of Pokhara valley. In· line with this, several experiments on growth and yield of carp fry in floating mtrsery cages with the effect of different density and feeding management were ·carried out. These studies focused on growth potential of lakes, season and fry density on the production of Silver carp (Hypophthalmicthys molitrix) and Bighead carp (Aristichthys nobilis) fingerlings. Water temperature was the most critical element in determining the growth of fry during winter season (October-January) in both Phewa and Begnas. lakes. The treatments' mean yield from density trial was 0.5, 1.0 and 1.5 kglm3 for Silver carp in lake Phewa, respectively for density 100, 300 and 500 tails/m3 . All the density treatment in Begnas resulted in loss of gross stocking weight at harvest. Fish fry of Aristichthys nobilis were stocked at densities of 250, 500, 1000 frylm3 of water volume. Fish fry were fed ad libitum for 120 days with a ration containing 19% protein. The absolute growth rate of fry was increased significantly (P dens;ties between each subperiod. The fry of Bighead carp showed highest net weight gain of 6.2 gljry for density 250 frylm3 followed by 5. 2 gljry for density 500 frylm3 . A high feed conversion ratio (FCR) associated with high dens{ty was observed