potential of aspikutum (a hybrid of leuciscus aspius ♀ × rutilus frisii ♂) for aquaculture: comparison of growth performance in earthen ponds and tanks

production of new hybrids is important for growing aquaculture and protecting wild stocks of fish species. a hybrid between female asp × male kutum ( leuciscus aspius ♀ × rutilus frisii ♂) was produced and its growth performance was monitored in two rearing systems for 55 days. the fish held in earthen ponds exhibited higher performance compared to those held in concrete tanks. the results also showed that larger rearing facilities beside the presented live feed in the earthen ponds can provide better environment and condition for production of the first step of culturing this hybrid fish.