Fish pond mechanization to enhance fish productivity

Abstract

From September to December 2019 at DoAR, Parwanipur, an experiment was conducted to identify the effects of a paddle wheel aerator and feed dispenser on the productivity of carp in a completely randomized design (CRD) having four treatments: No Aeration + No Feed Dispenser (T1), No Aeration + Feed Dispenser (T2), Aeration + No Feed Dispenser (T3) and Aeration + Feed Dispenser (T4) with three replications each.For grass carp, Dubo grass (Cynodon dactylon) and floating pellets at 3% of total body weight were also given to the fish every day.T4 had the largest extrapolated gross fish yield, followed by T3, T2, and T1, which were significantly different (p<0.05).The aggregate net fish yield was highest in T4, which had a statistically significant difference from T1 (p<0.05),whereas T2 and T3 were statistically not different to T1 and T4 (p> 0.05).Similar to this, it was discovered that T4 had the highest overall final yield, followed by T3, T2, and T1, which were all statistically different (p<0.05).The feed conversion ratio was found the least in T4 followed by T2, T3 and T1.These findings imply that aeration and feed dispensers may be a feasible method for aquaculture to increase the dissolved oxygen content in pond water as well as productivity.