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Performance of pangas (Pangasianodon hypophthalmus) under different densities in cages suspended in earthen pond / S. N. Mehta in Journal of Agriculture and Forestry University, Volume 2 (2018)
[article]
Title : Performance of pangas (Pangasianodon hypophthalmus) under different densities in cages suspended in earthen pond Material Type: printed text Authors: S. N. Mehta, Author ; S. K. Wagle, Author ; M. K. Shrestha, Author Publication Date: 2018 Article on page: 217-224 p. Languages : English (eng) Keywords: Survival, gross yield, net yield, food conversion ratio, gross margin Abstract: Pangas (Pangasianodon hypophthalmus) is a highly productive freshwater fish species. An experiment
was done at the Regional Agriculture Research Station, Tarahara, Nepal to assess production and
economics of pangas at different stocking densities. The experiment was conducted in 12 nylon net
cages (1 cm mesh size and 25 m3 ), fixed in a 7000 m2 earthen pond for 90 days. The experiment was
set up using a completely randomized design (CRD) with 4 treatments, each replicated thrice. The
treatments were: 80000 fish/ha (T1 ), 100000 fish/ha (T2 ), 120000 fish/ha and 140000 fish/ha (T4
).
Pangas yearlings of average weight 81.2±0.7 g were stocked in each cage. Fish were fed with 30% CP
pellet feed twice daily @ 3% of body weight. At harvest, the average weight of fish in T1 , T2 , T3 and T4
were 547.2, 552.8, 531.0 and 537.5 g, respectively, with an average growth rate of 5.2, 5.2, 5.0 and 5.1
g/fish/day, respectively. There were no significant differences in average harvest weight and growth
rate of fish among treatments. The survival rate of pangas was significantly lowest in T4 (85.5%),
intermediate in T3 (91.3%) and highest in T1 (96.8%) and T2 (95.6%) (p gross yield of pangas in T1 , T2 , T3 and T4 were 42.4, 52.9, 58.2 and 64.4 t/ha/cycle, respectively. The
extrapolated gross yield was significantly higher in T3 and T4 than T1 (p highest in T3 (NRs. 10511.4/cage), intermediate in T2 (NRs. 8184.1/cage) and lowest in T4 (NRs.
5798.9/cage). Growth of this fish was higher at lower stocking densities, but highest production was
obtained at highest stocking density. Based on the results of this study we can conclude that stocking
density of pangas at 120000 fish/ha (T3 ) is more profitable.Link for e-copy: https://afu.edu.np/sites/default/files/Performance_of_pangas_%28Pangasianodon_hy [...]
in Journal of Agriculture and Forestry University > Volume 2 (2018) . - 217-224 p.[article] Performance of pangas (Pangasianodon hypophthalmus) under different densities in cages suspended in earthen pond [printed text] / S. N. Mehta, Author ; S. K. Wagle, Author ; M. K. Shrestha, Author . - 2018 . - 217-224 p.
Languages : English (eng)
in Journal of Agriculture and Forestry University > Volume 2 (2018) . - 217-224 p.
Keywords: Survival, gross yield, net yield, food conversion ratio, gross margin Abstract: Pangas (Pangasianodon hypophthalmus) is a highly productive freshwater fish species. An experiment
was done at the Regional Agriculture Research Station, Tarahara, Nepal to assess production and
economics of pangas at different stocking densities. The experiment was conducted in 12 nylon net
cages (1 cm mesh size and 25 m3 ), fixed in a 7000 m2 earthen pond for 90 days. The experiment was
set up using a completely randomized design (CRD) with 4 treatments, each replicated thrice. The
treatments were: 80000 fish/ha (T1 ), 100000 fish/ha (T2 ), 120000 fish/ha and 140000 fish/ha (T4
).
Pangas yearlings of average weight 81.2±0.7 g were stocked in each cage. Fish were fed with 30% CP
pellet feed twice daily @ 3% of body weight. At harvest, the average weight of fish in T1 , T2 , T3 and T4
were 547.2, 552.8, 531.0 and 537.5 g, respectively, with an average growth rate of 5.2, 5.2, 5.0 and 5.1
g/fish/day, respectively. There were no significant differences in average harvest weight and growth
rate of fish among treatments. The survival rate of pangas was significantly lowest in T4 (85.5%),
intermediate in T3 (91.3%) and highest in T1 (96.8%) and T2 (95.6%) (p gross yield of pangas in T1 , T2 , T3 and T4 were 42.4, 52.9, 58.2 and 64.4 t/ha/cycle, respectively. The
extrapolated gross yield was significantly higher in T3 and T4 than T1 (p highest in T3 (NRs. 10511.4/cage), intermediate in T2 (NRs. 8184.1/cage) and lowest in T4 (NRs.
5798.9/cage). Growth of this fish was higher at lower stocking densities, but highest production was
obtained at highest stocking density. Based on the results of this study we can conclude that stocking
density of pangas at 120000 fish/ha (T3 ) is more profitable.Link for e-copy: https://afu.edu.np/sites/default/files/Performance_of_pangas_%28Pangasianodon_hy [...]