ASSESSMENT OF FECUNDITY, HATCHING & SURVIVAL RATE OF NILE TILAPIA (Oreochromis niloticus) APPLYING FEED WITH GARLIC AND GINGER EXTRACT

Abstract

The study was conducted at commercial hatchery at BRAC Tilapia Hatchery, Magura, Bangladesh and the analytical studies were conducted at Aquaculture Laboratory, Sher-e-Bangla Agricultural University to evaluate the effect of Garlic and Ginger extract in Nile tilapia diets on their reproductive performance (fecundity and hatching), survival rate on produced fry and hematological parameters of fry. A treatment was used as control without any extract. Nile tilapia (O. niloticus) with average weight of 267 g ± 3.16 were stocked for spawning into nine hapas at a density of 13 fish (10 females and 3 males) per 10 sq meter hapa, Three hapas with same diameters were used as replicates for each treatment. Hapas were fixed in an earthen pond (5 decimals). Feeding was done at a rate of 0.5% from their total biomass. Water quality parameters (temperature, pH, dissolved oxygen, ammonia) were measured weekly. Production of seed (eggs and fry) was compared with the tested diets. The highest mean of egg number (132.05 pcs) & mean spawn number (98.29 ± 1.11 pcs) per gram were obtained with the diets contained 0.02% Garlic extract (Treatment 2). Survival rate (84.24±0.05%) of fry was also found best with Treatment 2. Tilapia diets supplemented with Garlic extract had best responded on their reproductive performance (Hatching 80.63% ±1.05) and highest value FCR (1.43±0.19) & SGR (1.50 ± .19). The garlic extract treatment showed excellent performance for all the parameter under studied. Hence, the feeding with (0.02%) garlic extract can be used for large scale in tilapia breeding.