Prianka Paul

The experiment was conducted to provide information on the embryonic development of banded gourami, C. fasciata under controlled aquarium condition. The process of embryonic development was divided into seven phases- the zygote, cleavage, morula, blastula, gastrula, segmentation and hatching periods. At fertilization, the eggs were 0.35-0.50 mm in diameter which displayed total length of 0.50-0.70 mm, 22 hours after fertilization. First cleavage was recorded within 35 minutes after fertilization and the embryonic rudiments of developing eggs appeared at 21-22 hours. Cleavage resulted into 64-128 blastomeres and the crown of the blastoderm starts spreading over the yolk in the form of a thin layer in morula stage. In gastrula, blastoderm covered 3/4th of the yolk and embryonic shield was clearly visible. The embryo shows conspicuous muscular contractions and the beating heart at 22 hours after fertilization. This embryonic studies support phylogenetic development by presenting suppor...

The study was carried out to access on the present status of Tilapia (Oreochromis mossambicus) marketing in Jessore sadar in Jessore district. Study period was carried out during June 2013 to December 2013. For the market survey, two important fish markets in Jessore town, namely Boro Bazaar and Rail-station Bazaar Similarly, two important local fish markets in the Jessore Sadar namely Churamonkati Bazaar and Ambot-tola Bazaar were selected to carry out comparative studies of tilapia marketing between town and local markets. A total of 80 traders were interviewed in Local and Town markets, 40 in each area. In the study area 65% of harvested tilapias are sold to the local agents, while the rest (35%) are sold to the suppliers and about 60% of tilapias are transported to the boro bazaar. The rest (40%) of the tilapia, which are under-sized, are transported to nearby local markets. The average farm-gate prices of tilapia varied between Tk 55 and Tk 85 per kg. According to the survey, a...

The effect of five different supplementary feeds on growth, survival and production were investigated for juveniles of Macrobrachium rosenbergii. The best growth was obtained with the feed containing 31.50% dietary protein. Feed conversion ratio decreased with increasing weight of prawn and is negatively correlated with dietary protein level. The highest average weight gain (48.03g) of prawn was found in treatment T1. The mean survival rates were found at 86.46, 81.33, 75.33, and 79.44 and 78.33% in T1, T2, T3, T4 and T5 treatments, respectively. The comparable net production of freshwater prawn was (166.14kg/bigha) significantly higher (P≤0.05) in treatment T1 among all the treatments. The feed conversion ratio was the lowest (1.13) and specific growth rate was the highest (2.19%) found in treatment T1.Considering all facts, the better growth performance was recorded in treatment T1 compared to other treatments T2, T3, T4 and T5.

The study was conducted to evaluate growth, survivability, and proximate composition of Liza parsia at different salinities to adopt as a potential aquaculture species in salinity intruded coastal areas of Bangladesh. The experiment was carried out at laboratory conditions in rectangular tanks (25 L) with five different salinities viz. 0, 5, 10, 15 and 20 ppt correspondingly considered as T1(control), T2, T3, T4 and T5. Fingerlings were collected from the Pashur river and stocked at 10 individual/25L tank. After 90 days of culture period, growth was found significantly different among the treatments. Average weight gain was highest inT2 (1.76±0.19) and lowest inT5 (0.91±0.15). Interestingly survival rate was found 100(%) in all treatment. Specific growth rate was 0.829±0.10, 1.162±0.14, 0.744±0.2, 0.736±0.10 and 0.605±0.15 respectively in T1, T2, T3, T4 and T5. Average daily gain was found higher in T1 (0.059± 0.006g/d), compared to other treatment. The average food conversion ratio...

Post-harvest loss of mrigal (Cirrhinus cirrhosus), catla (Catla catla), rohu (Labeo rohita) and kalibaush (Labeo calbasu) in different distribution channel of Noakhali district, Bangladesh were observed during the month of January 2015 to April 2015. Sensory evaluation method was adopted in order to gather information about quality loss of fish and existing handling condition at different stakeholder level. The observed fish were fresh at fisherman level but as the day progress along with temperature variation fish started losing quality and most of their quality found lost at retailer level. Fisherman supplied fish to beparies at 5% quality loss, further 10%, 20% and 22% loss was observed through aratder, retailer and consumer respectively. DPs varied with the month basis, compared to January–February the DPs were higher in March–April which indicates that temperature rise cause more quality loss of fish. Most of the fishes crossed DP 3.0 at retailer level because of long term expo...

To study the effect of different stocking densities on the growth, survival and production of the freshwater prawn the post larvae with mean initial weight of 0.22±0.04g were stocked at 40, 50, and 80PL/decimal and cultured for a period of 150 days under gher conditions. The culture ponds were manured with cow dung and inorganic fertilizers and a supplementary feed of 28.82% crude protein was given to the prawns. Prawns were fed artificial diet with 10% of their body weight at 1 month (up to 30 days) and reduced to 7% at 2 month (up to 60 days), 5% at 3 month and were continued till the end of the experiment. Feed was distributed evenly over the ponds surface twice daily. The experimental ponds were harvested after five months of culture. The results indicated that at low stocking density (40post larvae/decimal) the growth, survival and production were higher. Prawns attained a final mean body weight of 38.71±3.79g and 21.59±2.64g in low and higher stocking densities, respectively. ...