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.
Description:
A Thesis
Submitted to the Faculty of Agriculture,
Sher-e-Bangla Agricultural University, Dhaka,
in partial fulfillment of the requirements
for the degree of
MASTER OF SCIENCE
IN
BIOTECHNOLOGY
SEMESTER: JULY-DECEMBER, 2021
