The study aimed to evaluate the growth at grow-out stage of climbing perch offspring artificially propagated from four broodstock sources including normal strains of climbing perch collected in (i) Ca Mau, (ii) Dong Thap, (iii) Hau Giang provinces and (iv) square head climbing perch. Sixty-day old fingerlings were randomly assigned to 16 hapas (1.5 x 1.5 x 2 m) suspended in the same pond. Fish were stocked 100 individuals with uniform size for each hapa. Difference in initial sizes within treatments was treated as block effect After 4 months of culture, square head strain had the significantly highest weight (20.73 + or - 3.95 g) compared to wild strains (Ca Mau: 17.29 + or - 1.99 g; Hau Giang: 12.30 + or - 0.67 g and Dong Thap: 10.70 + or - 1.23 g). However, daily weight gain (DWG) of square head strain (0.130 + or - 0.015 g/day) Was not significantly different from that of Ca Mau strain (0.117 + or - 0.011 g/ day). Ca Mau climbing perch performed the highest growth rate among wild strains. Survival and feed conversion ratio were similar among 4 strains. Within strains, initial size did not affect DWG. Results indicate that Ca Mau and square head strain can be good genetic sources for further breeding programs of climbing perch.
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