Background and Objective: Proper knowledge on reproductive biology is important for the successfu... more Background and Objective: Proper knowledge on reproductive biology is important for the successful management of fisheries, aquaculture and conservation of a target species in the wild. The present study was investigated to uncover the reproductive biological information including the spawning season of Xenentodon cancila . Materials and Methods: About 325 Xenentodon cancila samples were collected from the waters of North-East Bangladesh for a period of 1 year. Data on length, weight, sex ratio, condition factor, fecundity and Gonado Somatic Index (GSI) were recorded to uncover the breeding biology of this fish in wild condition. Results: The length ranged between 20.20-23.91 cm (Mean±SD = 20.57±2.59) and their weight ranged between 19.70-43.85 g (Mean±SD = 30.22±8.12). Females were dominant in larger length groups being most apparent during the resting phase of reproductive cycle and in the peak of the spawning period, occurring in the month of June. The sexual ratio of all specimens was m/f = 1:1.11. The mean batch fecundity was 1789.69±347.06 of matured oocytes per ovary. Gonado somatic index data showed continuously increasing trend during the months of January-April until it reaches to the peak in June and followed by gradually decreasing in the months of September-November. Conclusion: On the basis of the collected data, it can be concluded that spawning season for this fish in wild ranged from April-August while peak in June in weather condition of North-East Bangladesh.
Studies were conducted to determine changes in pangas catfish (Pangasianodon hypophthalmus) fille... more Studies were conducted to determine changes in pangas catfish (Pangasianodon hypophthalmus) fillet quality during frozen storage by organoleptic and biochemical tests. Fillet remained acceptable for 120 days whereas after 150 days becomes inedible. Myofibrillar protein solubility for fresh samples was 88.21%; fell to 45.29% at 150 days at -20°C frozen storage. For one-step heating process gel forming ability as well as initial breaking force (IBF) was (790±4.47) g which reduced to (245±0.56) g at 50°C for 120 minutes after 21 days. IBF reduction were same at 50°C and 80°C for 120 and 30 minutes respectively for two-step heating which fall from (980±2.68 g) to (420±4.12 g). Folding test and teeth cutting test results were found same for both heating processes. Two steps heating shows higher gel strength. TVB-N values of fresh samples were 1.68 mg/100g at 150 days of storage, reached to 26.24 mg/100g that exceed the recommended range. The muscle pH immediately after death was 7.07 fel...
A total of 550 samples of water and soil sediments from 250 farms and 50 hatcheries were collecte... more A total of 550 samples of water and soil sediments from 250 farms and 50 hatcheries were collected from Khulna, Bagerhat, Jessore, Narail and Sathkhira district of Bangaldesh during September, 2011 from South-West Bangladesh to investigate the presence of Salmonella. Investigation shows that for golda hatcheries 6 samples of water/sediment out of 74 samples were found to be contaminated with Salmonella in Bagerhat district, 2 sample out of 65 samples of water and soil sediment were contaminated with Salmonella in Khulna while it was 6 out of 18 in Satkhira district. Experiment revealed that about 72.22% pond water and soil sediment were contaminated with Salmonella in Satkhira followed by 44.23% in Jessore district. In contrary, it was higher in Khulna district (38.46%) followed by Narail (32.14%). It is interesting to note that shrimp farms contaminated with Salmonella were distributed throughout the study area, whereas in case of hatcheries, they were concentrated mainly in Bagerh...
Background and Objective: Proper knowledge on reproductive biology is important for the successfu... more Background and Objective: Proper knowledge on reproductive biology is important for the successful management of fisheries, aquaculture and conservation of a target species in the wild. The present study was investigated to uncover the reproductive biological information including the spawning season of Xenentodon cancila . Materials and Methods: About 325 Xenentodon cancila samples were collected from the waters of North-East Bangladesh for a period of 1 year. Data on length, weight, sex ratio, condition factor, fecundity and Gonado Somatic Index (GSI) were recorded to uncover the breeding biology of this fish in wild condition. Results: The length ranged between 20.20-23.91 cm (Mean±SD = 20.57±2.59) and their weight ranged between 19.70-43.85 g (Mean±SD = 30.22±8.12). Females were dominant in larger length groups being most apparent during the resting phase of reproductive cycle and in the peak of the spawning period, occurring in the month of June. The sexual ratio of all specimens was m/f = 1:1.11. The mean batch fecundity was 1789.69±347.06 of matured oocytes per ovary. Gonado somatic index data showed continuously increasing trend during the months of January-April until it reaches to the peak in June and followed by gradually decreasing in the months of September-November. Conclusion: On the basis of the collected data, it can be concluded that spawning season for this fish in wild ranged from April-August while peak in June in weather condition of North-East Bangladesh.
Studies were conducted to determine changes in pangas catfish (Pangasianodon hypophthalmus) fille... more Studies were conducted to determine changes in pangas catfish (Pangasianodon hypophthalmus) fillet quality during frozen storage by organoleptic and biochemical tests. Fillet remained acceptable for 120 days whereas after 150 days becomes inedible. Myofibrillar protein solubility for fresh samples was 88.21%; fell to 45.29% at 150 days at -20°C frozen storage. For one-step heating process gel forming ability as well as initial breaking force (IBF) was (790±4.47) g which reduced to (245±0.56) g at 50°C for 120 minutes after 21 days. IBF reduction were same at 50°C and 80°C for 120 and 30 minutes respectively for two-step heating which fall from (980±2.68 g) to (420±4.12 g). Folding test and teeth cutting test results were found same for both heating processes. Two steps heating shows higher gel strength. TVB-N values of fresh samples were 1.68 mg/100g at 150 days of storage, reached to 26.24 mg/100g that exceed the recommended range. The muscle pH immediately after death was 7.07 fel...
A total of 550 samples of water and soil sediments from 250 farms and 50 hatcheries were collecte... more A total of 550 samples of water and soil sediments from 250 farms and 50 hatcheries were collected from Khulna, Bagerhat, Jessore, Narail and Sathkhira district of Bangaldesh during September, 2011 from South-West Bangladesh to investigate the presence of Salmonella. Investigation shows that for golda hatcheries 6 samples of water/sediment out of 74 samples were found to be contaminated with Salmonella in Bagerhat district, 2 sample out of 65 samples of water and soil sediment were contaminated with Salmonella in Khulna while it was 6 out of 18 in Satkhira district. Experiment revealed that about 72.22% pond water and soil sediment were contaminated with Salmonella in Satkhira followed by 44.23% in Jessore district. In contrary, it was higher in Khulna district (38.46%) followed by Narail (32.14%). It is interesting to note that shrimp farms contaminated with Salmonella were distributed throughout the study area, whereas in case of hatcheries, they were concentrated mainly in Bagerh...
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Papers by Sohel Mian
aquaculture and conservation of a target species in the wild. The present study was investigated to uncover the reproductive biological
information including the spawning season of Xenentodon cancila . Materials and Methods: About 325 Xenentodon cancila samples
were collected from the waters of North-East Bangladesh for a period of 1 year. Data on length, weight, sex ratio, condition factor,
fecundity and Gonado Somatic Index (GSI) were recorded to uncover the breeding biology of this fish in wild condition. Results: The
length ranged between 20.20-23.91 cm (Mean±SD = 20.57±2.59) and their weight ranged between 19.70-43.85 g
(Mean±SD = 30.22±8.12). Females were dominant in larger length groups being most apparent during the resting phase of
reproductive cycle and in the peak of the spawning period, occurring in the month of June. The sexual ratio of all specimens was
m/f = 1:1.11. The mean batch fecundity was 1789.69±347.06 of matured oocytes per ovary. Gonado somatic index data showed
continuously increasing trend during the months of January-April until it reaches to the peak in June and followed by gradually decreasing
in the months of September-November. Conclusion: On the basis of the collected data, it can be concluded that spawning season for
this fish in wild ranged from April-August while peak in June in weather condition of North-East Bangladesh.
aquaculture and conservation of a target species in the wild. The present study was investigated to uncover the reproductive biological
information including the spawning season of Xenentodon cancila . Materials and Methods: About 325 Xenentodon cancila samples
were collected from the waters of North-East Bangladesh for a period of 1 year. Data on length, weight, sex ratio, condition factor,
fecundity and Gonado Somatic Index (GSI) were recorded to uncover the breeding biology of this fish in wild condition. Results: The
length ranged between 20.20-23.91 cm (Mean±SD = 20.57±2.59) and their weight ranged between 19.70-43.85 g
(Mean±SD = 30.22±8.12). Females were dominant in larger length groups being most apparent during the resting phase of
reproductive cycle and in the peak of the spawning period, occurring in the month of June. The sexual ratio of all specimens was
m/f = 1:1.11. The mean batch fecundity was 1789.69±347.06 of matured oocytes per ovary. Gonado somatic index data showed
continuously increasing trend during the months of January-April until it reaches to the peak in June and followed by gradually decreasing
in the months of September-November. Conclusion: On the basis of the collected data, it can be concluded that spawning season for
this fish in wild ranged from April-August while peak in June in weather condition of North-East Bangladesh.