Assessment of growth, survival, and disease resistance at 60 days of age in fast-growing and bacillary necrosis of pangasius (BNP)-resistant selectively bred striped catfish strains
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Abstract
This study evaluated the growth performance, survival rate, and prevalence of common diseases in two selectively bred strains of striped catfish (Pangasianodon hypophthalmus): a fast-growth strain (G4-TT) derived from a selective breeding program and a strain selected for resistance to Bacillary Necrosis of Pangasius (BNP) (G1-KB), in comparison with a commercial control strain. The three strains were co-cultured in 15-m³ cement tanks separated by mesh partitions, with three replicates. After 60 days of nursing, significant differences in body weight, total length, and survival rate were observed among the strains (P < 0.05). The G4-TT strain exhibited the highest growth performance and survival rate (5.34 g, 89.8 mm, and 43.6%, respectively), followed by the G1-KB disease-resistant strain (4.0 g, 83.2 mm, and 37.3%), whereas the commercial strain showed the lowest values (2.89 g, 75.7 mm, and 18.4%). All strains were infected with Trichodina spp. and Aeromonas spp., but only at mild levels, without clear clinical signs. The results indicate that during the early life stage (from fry to 60 days old), both selectively bred strains show higher growth performance and survival rates compared with the commercial strain.
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References
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