Md Shahjahan
Biography
Md Shahjahan is a Professor of Fisheries Science in Bangladesh Agricultural University (BAU). He obtained PhD degree under MEXT scholarship from Kyushu University, Japan in the field of reproductive neuroendocrinology in 2010. Dr. Shahjahan completed his postdoctoral research in Niigata University funded by the JSPS of Japanese government. He completed another post-doctoral study at the Monash University Sunway Campus, Malaysia with an award by the Australian government for a year during 2012. He set up the laboratory of Fish Ecophysiology in 2017 at BAU. The works in this laboratory mainly includes the analyses of the impacts of environmental factors (temperature, light, salinity, pesticides, heavy metals etc.) on fish physiology, especially on growth and reproduction. In the laboratory, the physiological parameters of blood as biomarkers and a number of molecular techniques like real time PCR are used. To date, 8 PhD and more than 75 MS students completed their degree under the supervision of Prof. Shahjahan. Currently he is supervising 4 more PhD students and 10 MS students in the field of fish ecophysiology. He published a good number of articles in international high impact factor journals, including Reviews in Aquaculture, Science of the Total Environment, Chemosphere, Marine Pollution Bulletin, Aquaculture, Aquaculture Reports, Journal of Thermal Biology etc. Prof. Shahjahan received UGC gold medal award for 2013 & 2018, BAS-gold medal award 2015, best publication awards and a number of other awards for his outstanding research performances.
Research Interest
Abstract
An experiment was conducted to determine the possibilities of two-tier system (nursery and grow-out stage) cage culture of Asian seabass Lates calcarifer in the coast of Munshiganj, Satkhira and Moheshkhali Channel, Cox’s Bazar, in six cages (1 for nursery and 2 for grow-out in each location) with direct participation of coastal fisher communities for 365 days. Survival, growth performance viz. weight gain (WG), specific growth rate (SGR), and feed conversion ratio (FCR) (nursery stage); along with proximate composition, gut content, intestinal histology and cost-benefit were analysed in the grow-out stage. In the nursery stage (initial weight 1.05 g), fish fed with 52% crude protein feed at 10–8% of biomass twice a day for 90 days resulted in 61.13 and 57.47% survival rate, 9.20 and 6.98 g WG, 2.53 and 2.26 %/day SGR, 1.97 and 2.85 FCR in Munshiganj and Moheshkhali, respectively. Subsequently, fish was distributed to the grow-out cages at a density of 15 fish/m3, fed with 45–40% protein supplemented feed at 5–1% of their body weight for 275 days. Result showed significantly higher survival (90.13%), WG (1009.15 g), and lower FCR (1.71) in Munshiganj compared to Moheshkhali (Survival 85.06%, WG 815.93 g, and FCR 1.93). Gut content analysis revealed that fish predated macro-sized natural food inside the cages during the culture period. Cage-cultured fish contained significantly higher amount of protein (highest in Munshiganj 19.07%) compared to the respective wild in both locations. Histo-morphology of intestine revealed that fish intestine was in better condition than as were observed in the wild. Production was higher in Munshiganj (800–840 kg/cage) than Moheshkhali (600–650 kg/cage), thus, benefit-cost ratio was higher in Munshiganj (1.66) compared to Moheshkhali (1.37). This study explored the opportunities of marine cage farming of seabass in Bangladesh, ultimately, will help to increase mariculture production through cage farming of marine finfishes and ensure better food and nutritional security.
