http://localhost:8080/handle/123456789/5157 2026-04-07T04:01:38Z 2026-04-07T04:01:38Z Rahman, Jamilur http://localhost:8080/handle/123456789/5181 2024-01-10T07:01:58Z 2022-01-01T00:00:00Z

DEVELOPMENT OF CANOLA GRADE INDIAN MUSTARD (Brassica juncea) VARlETY TO MEET THE EDIBLE OIL SECURITY AND CLIMATE CHANGE CHALLENGES IN BANGLADESH Rahman, Jamilur Abstract Erucic acid >2% in mustard oil is considered as unhealthy as edible oil and antinutritional for human consumption. The existing all mustard varieties of Bangladesh contain 40-48% erucic acid, which is a big concern for food and nutritional security and safety of the country. Hence, to develop canola grade mustard variety, six Bangladeshi Brassica juncea mustard variety were crossed with a canola grade double zero B. juncea line in 7x7 half diallel fashion. The developed 21 F] hybrids along with their parents were evaluated for yield contributing traits and fatty acid compassions. High narrow sense heritability was observed in days to pod maturity, while plant height, days to first flowering and seeds per siliquae showed moderate narrow sense heritability. The parental lines, PI, P3 and P4 were found as the best general combiner for earliness and dwarfness and, P2 and P7 showed the best combiner for yield contributing traits. Whereas, the hybrid lines, G3, G11 and G 13 indicated the best specific combiners for yield attributes, and the crosses, G6, G17 and G21 found for early maturity. The hybrid G3, G5 and G17 manifested the highest heterosis for early maturity over the check variety BARI sharisha 11. In the fatty acid compositions analysis, the crosses G19-54, G5-S 1 and G21-S I contained low erucic acid. In hybrids, total saturated fatty acid and mono-unsaturated fatty acid was ranged from 10.81% to 16.53% and 40.60% to 59.18%, respectively. The highest ratio of oleic acid (0)-9) to linoleic (0)-6) acid was found in P6, G5-S 1 and G 19-54. Moreover, P6, G19-54 and G19-52 showed the highest ratio of linoleic (CD-6)to linolenic (CD3) acid. The selected F] hybrid lines were further backcrossed to the selected Bangladeshi parents to reduce the growth duration and the seven types of BC] F] and BC2F] lines were developed. Altogether, the hybrids viz., G4, G5, G7, Gl1, G17, G19, G21 and lines ofBC]F" BC]F2and BC2F] could be utilized to develop early matured, high yielding low erucic acid containing improved mustard variety. Key words: low erucic acid, canola-grade, saturated and unsaturated fatty acid, breeding lines, climate change, Brassica juncea

2022-01-01T00:00:00Z Shahabuddin, A. M. http://localhost:8080/handle/123456789/5180 2024-01-10T06:09:34Z 2022-01-01T00:00:00Z

DEVELOPMENT OF LOCALLY ENGINEERED LOW-COST RECIRCULATING AQUACULTURE SYSTEM (RAS) IN BANGLADESH Shahabuddin, A. M. Abstract The Recirculating Aquaculture System (RAS) is a healthy method of producing fish in which fish are continuously grown in the same water at high densities in regulated environments. The method guarantees every environmental factor that attests to a fishfriendly atmosphere and a high level of culture system, which would create a new export market for various local species. Bangladesh hence has a significant demand for aquaculture mechanization and intensification through RAS. The RAS system must be affordable, easy to use, and efficient. The usage of regional resources in a certain fish culture, the surrounding environment, and fish pricing must all be taken into account in the design. Testing of local species is therefore necessary for the creation of an effective RAS. One of the most important ways to maximize water reuse and increase fish output in Bangladesh is to establish and test low-cost RAS utilizing local resources. In addition to these, using solar power to reduce energy costs would be a wise move. For this reason, the goal of the current research project is to create a locally manufactured RAS through the fabrication of crucial components for the intensive cultivation of high-value species utilizing resources that are readily available and indigenous technology. For the purpose of cultivating commercial fish species, a project is developed to create, modify, and validate a locally engineered RAS. To ascertain the current state of RAS in Bangladesh, a KII was carried out with various RAS entrepreneurs, importers, equipment makers, and service providers. Among the various important concerns, some of the more significant ones were improper RAS design, insufficient technical expertise, a shortage of experienced labour, equipment selection, water flow rate computation, species selection, excessive operating costs, etc. In order to lower the RAS's operating costs, an engineering design and technical specifications were created based on the findings. The water recirculation system was designed using an underground gravity flow mechanism. The water recirculation system was designed using an underground gravity flow mechanism. Low-cost tanks with a sloping bottom were designed and built. A total of twelve FRP tanks and twelve triple tanks with PVC supports, each with a capacity of 3.5 cubic meter, were built. To get rid of the majority of the solid particles in the water, a low-cost vortex filter was added to the system. It was noted that the material used in Moveable Bed Reactors (MBBRs) manufactured locally is effective in removing ammonia from water. An oxygen cone constructed locally proved successful in raising the inflow water's oxygen content. When compared to traditional RAS, it was found that locally designed, low-cost RAS is efficient in raising fish using less energy. Keywords: indoor fish culture, intensive aquaculture, recirculating aquaculture, energy

2022-01-01T00:00:00Z Rana, Md. Masud Habib, Kazi Ahsan http://localhost:8080/handle/123456789/5179 2024-01-10T06:06:48Z 2022-01-01T00:00:00Z

DEVELOPMENT OF FISH FLESH POWDER AND POWDER-BASED COOKIES AND SNACKS FROM PANGUS, SILVER CARP, TILAPIA AND TUNA FISH (PATENT NO: IPC: A23L 17/00, 1006455, 19/2020) Rana, Md. Masud; Habib, Kazi Ahsan Abstract Generally, the cookies and snacks available in the market are made of flour, leavener, salt, sugar, butter, egg, oil and some other extra added flavor in some special case. White, processed flour and more starch in the regular diet increase blood sugar, which in turn puts unnecessary stress on the liver. Fish consumption helps to reduce coronary heart disease incidence and mortality due to having beneficial effects omega-3 PUFA, EPA & DHA. Increased protein intake also balances blood sugar and insulin, reducing cravings and detoxing the liver. Therefore, fish protein-based food is relatively nutritious and safer than carbohydrates for human body. A method was developed for producing powder from fish having protein content ranged between 80-90% (dry basis). Then, the value-added fish cookies and snacks (viz. biscuit, chanachur & chips) were made from fish powder containing 30-40% protein. Major portion of fats were removed from fish flesh which protects the products from fat oxidation. Bacterial population of the developed products were found ranged between 1.3x l 03 to 2.4x 103 CFU/gm. The present invention reveals that if we can add the fish protein to produce the cookies and snacks like biscuits, chanachur and chips it would be safer for health with helping in balancing blood sugar and detoxing the liver. Keywords: fish flesh powder, cookies, nutritious, low-cost, value addition

2022-01-01T00:00:00Z Habib, Kazi Ahsan Islam, Md. Jayedul Neogi, Amit Kumer http://localhost:8080/handle/123456789/5178 2024-01-10T06:03:26Z 2022-01-01T00:00:00Z

ASSESSMENT OF UNDERWATER BIODIVERSITY OF SAINT MARTIN'S ISLAND OF BANGLADESH Habib, Kazi Ahsan; Islam, Md. Jayedul; Neogi, Amit Kumer Abstract Occupying less than one percent of the ocean floor, reefs are home to more than twenty-five percent of marine life. Saint Martin's Island (SMI) is the only island in Bangladesh where a reef-like ecosystem is found. An underwater survey was conducted to uncover the underwater biodiversity on this island in the winter seasons from 2016 to 2019. The photographs of these species were captured by scuba diving and snorkeling in a water depth of about 3 to 7 meters. The study revealed 131 faunal and 18 floral species of different taxa viz. Bivalves (5 species), Crabs (5 spp.), Feather star (l sp.), Fireworm (l sp.), Fishes (53 spp.), Flatworm (l sp.), Hard corals (27 spp.), Hermit crab (1 sp.), Jellyfishes (3 spp.), Lobster (1 sp.), Octopus (1 sp.), Sea anemones (3 spp.), Sea cucumber (1 sp.), Sea fans (8 spp.), Sea fern (1 sp.), Sea slug (6 spp.), Sea turtle (1 sp.), Sea snail (1 sp.), Sea star (l sp.), Sea urchin (1 sp.), Sea whip (1 sp.), Sponges (3 spp.), Tubeworms (4 spp.), Zoanthid coral (2 spp.), and Seaweed (18 spp.). Coral bleaching was also observed in this study. The present study exposes the hidden beauties of rich underwater biodiversity of this island to the people with the hope to take part in supporting and conserving this island by the tourists, related stakeholders and government. Keywords: Saint Martin' Island, underwater survey, snorkeling, scuba diving, coral.

2022-01-01T00:00:00Z