Abstract:
Snakehead fish (Channa striata) is a well known and important freshwater fish in
Southeast Asian countries. The experiment was conducted at Sher-e-Bangla
Agricultural University Biofloc Culture Lab to evaluate the growth performances,
survival rate and nutritional composition of snakehead fish (C. striata). There has four
treatments with three replications. Water quality parameters were monitored through
temperature, dissolved oxygen, pH, ammonia, total dissolved solids, alkalinity and
hardness. Maximum length increase (14.15±0.2) cm of C. striata was found in
treatment-4. Highest weight gain also noticed in the same treatment which was
(105.67±6.65)g. Control treatment showed lowest performance among the parameter
studied. Maximum specific growth rate was 2.70% in treatment-4 whereas 2.50% was
minimum in treatment-1. In treatment-3 survival rate was highest, which was 75.76%
and in control treatment, the lowest survival rate was recorded that was 47.88%. Feed
conversion ratio was better (1.08) in tretment-4. Daily mean weight gain was
noteworthy in treatment-4 which was 1.50g and lowest daily mean weight gain was
recorded 1.1g in control treatment. From the analysis of proximate composition of C.
striata 69.67% protein content was available in treatment-4 which was maximum and
the lowest protein content was found 61.84% in treatment-2. Considering all the
results, the optimum growth performance and nutritional composition was better in
treatment-4 (Extract of Garlic and Amla) compared to other treatments. In the era of
aquaculture and microbial biotechnology there has a huge potentiality to fulfill the
requirement of fish protein by the culture of C. striata in biofloc technology.
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 (MS) IN
BIOTECHNOLOGY
