A Study on Growth Performance of Interspecific Crosses-hybrid Catfish Spices: Buk Siam Hybrid Catfish (Male Pangasianodon gigas x Female P. hypophthalmus) Pangasius larnaudii and Pangasius sanitwongsei
Keywords:
hybrid catfish, growth, heterosis, genetic improvementAbstract
A study on the growth of 3 hybrid catfish species for commercial aquaculture and community enterprise, comprising of PL (Pangasius larnaudii) weight 3-5 kg, aged 5-6 years; PGPH (BukSiam hybrid catfish weight 2-3 kg, aged 2-3 years, male Pangasianodon gigas x female P. hypophthalmus) and PS (Pangasius sanitwongsei) weight 3-5 kg, aged 5-6 years. Mating was as follows: female PL x male PL, female PGPH × male PGPH, female PGPH × male PL, female PL× male PGPH and female PGPH × male PH. It was found that, at age 8 months, the final body weight and total length of different strains were highly significantly different (p<0.01). Body weight and total length of female PL × male PGPH were the highest: 28.74±11.16 g and 15.34±15.85 cm; body weight and total length of female PGPH × Male PL were 25.18±13.62 g and 13.48±25.68 cm; body weight and total length of female PGPH × male PS were 22.04±6.74 g and 13.06±12.47cm; body weight and total length of female PGPH × male PGPH were 19.00±16.52 g and 13.50±25.43 cm; body weight and total length of female PS × male PS was lowest: 12.12±5.08 g and 11.01±12.46 cm, respectively. Average Daily Gain (ADG: g/day) female PL x male PL, female PGPH × male PGPH, female PGPH × male PL, female PL × male PGPH and female PGPH ×male PH were 0.04, 0.06, 0.07, 0.09 and 0.07, respectively. The heterosis of female PL × male PGPH was the highest at 84.70 %; followed by female PGPH × Male PL which was 61.83%, respectively. These results imply the potential of the production of 3 hybrid fish species between female P. larnaudii × male BukSiam hybrid catfish for increasing of hybrid catfish production in the aquaculture system in order to add value and healthy food to community enterprises.
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