The present study was conducted for the review of present method practiced for all male mono-sex ... more The present study was conducted for the review of present method practiced for all male mono-sex GIFT seed production by using 17-α methyl testosterone hormone in Bangladesh. In Bangladesh, all male mono-sex GIFT seed production by using 17-α methyl testosterone hormone is performed from the mid February to November, starting with egg collection. Smaller hatching trays or, jogs were used for the incubation of the collected eggs for 5 days which are eventually followed by incubation in the larger hatching trays for 36 to 48 hours until the yolk sac totally disappeared. The hormone mixed feed (contained 17-α Methyl testosterone (MT) hormone at the rate of 60-70 mg/Kg) was composed of 50% fishmeal, 30% wheat bran and 20% rice bran. The post larva were subjected to hormone mixed powdered feed for the first time after transferring them to transitory tanks and treated there for 5 days. Into the S.R.T. (Sex Reversal Treatment) ponds, further treatment was completed. There they fed frequent...
This study illustrates the potential application of geographic information systems (GIS) and spat... more This study illustrates the potential application of geographic information systems (GIS) and spatial analysis techniques to support the fisheries management. GIS aids are familiar as an influential tool to attain this purpose in aid of a well-versed management decision system. In this context the spatial component of fisheries comes to be a main concern and the whole discipline turn into highly compatible with GIS. Harmonized with this new leaning, the objective of this paper is to demonstrate an innovative way to employ the geographic information allied with fisheries data to effectually envision and enumerate temporal and spatial data arrays in fisheries events. The core utilities of the fishery GIS are catch and effort approximation and their disparity in space and time, fishing vessel utilization, data quality control and obtaining information on the site of significant economical and endangered species. The outputs formed through the GIS aids are appositely designed for additio...
International Journal of Fisheries and Aquatic Studies, 2017
Environmental issues are ignored in Bangladesh while considering aquaculture practices but unfort... more Environmental issues are ignored in Bangladesh while considering aquaculture practices but unfortunately the environment suffers the most because of over exploitation. The stress of aquaculture over environment starts with the collection of fish seed, because the natural water body is till now the prime source of aquaculture stocking materials. In aquaculture plenty of tons of water and exchange of that is needed periodically but in our country we have a very little or in most of the cases don't have any waste water treatment facility in hatcheries or culture farms and that's why recycle of waste water or treat water before discharge to the nature is not possible till now. In most cases, the used water or wastage of aquaculture is being released to the natural waterbody or main river stream without any treatment which leads to the disease outbreak, invasion of undesired species or foreign species, imbalance in biodiversity and ecosystem. Besides in our aquaculture a plenty o...
International Journal of Fisheries and Aquatic Studies, 2016
The present study was conducted for the review of present method practiced for all male mono-sex ... more The present study was conducted for the review of present method practiced for all male mono-sex GIFT seed production by using 17-α methyl testosterone hormone in Bangladesh. In Bangladesh, all male mono-sex GIFT seed production by using 17-α methyl testosterone hormone is performed from the mid February to November, starting with egg collection. Smaller hatching trays or, jogs were used for the incubation of the collected eggs for 5 days which are eventually followed by incubation in the larger hatching trays for 36 to 48 hours until the yolk sac totally disappeared. The hormone mixed feed (contained 17-α Methyl testosterone (MT) hormone at the rate of 60-70 mg/Kg) was composed of 50% fishmeal, 30% wheat bran and 20% rice bran. The post larva were subjected to hormone mixed powdered feed for the first time after transferring them to transitory tanks and treated there for 5 days. Into the S.R.T. (Sex Reversal Treatment) ponds, further treatment was completed. There they fed frequent...
Asian Journal of Fisheries and Aquatic Research, 2018
The current study was performed to monitor in situ condition and spatio-temporal modelling of the... more The current study was performed to monitor in situ condition and spatio-temporal modelling of the present status of water quality parameters of different spawning grounds and sanctuaries of Hilsha. The study was conducted in nine sites in lower Padma River (Maowa) to lower Meghna River (Bhola, Patuakhali) from 1 August 2015 to 31 January 2016. This study demonstrates surface water temperature, salinity, conductivity and transparency were ranged from 19.00-33.00°C, 0.10-2.90 ppt, 125.60-4720.00 µS/cm and 6.60-74.00 cm respectively. The values of pH, DO, free CO2, total alkalinity, total hardness and free NH3 were varied from 6.00-9.50, 4.50-11.60 mg/L, 3.46-24.00 mg/L, 33.00-172.50 mg/L, 34.20-1291.00 mg/L and 0.20-1.40 mg/L respectively. Moreover, water quality model reveals that the present status of some water quality parameters (free CO2, free NH3, transparency) deviated from optimum condition suitable for the normal physiological process and spawning of Hilsha.
International Journal of Fisheries and Aquatic Studies, 2017
At present the global milieu is extremely susceptible to the effects of climate change typically ... more At present the global milieu is extremely susceptible to the effects of climate change typically the fisheries sector owing to its economics, diets and social dependencies on fisheries and climate change is exerting an extra pressure over the many folds (fishing pressure, loss of habitat, pollution, disturbance and introduced species) and the fish stocks all over the world have already experienced the adversities. Besides, temperature rise, amplified irregularities in the rainfall pattern and frequency and harshness of life-threatening occurrences, upsurges of precipitation, tremendous flooding and salinity intrusions may have an undesirable impact on aquatic biota as well as fish. The utmost imperative effects of climate change in fisheries sector are – destruction of habitat, alteration of habitat conditions, disease outburst, obstacle in migration routes, hindrance in reproduction and finally reduced production. In Bangladesh climate changes also distresses the Sundarbans, the wo...
The present study was conducted for the review of present method practiced for all male mono-sex ... more The present study was conducted for the review of present method practiced for all male mono-sex GIFT seed production by using 17-α methyl testosterone hormone in Bangladesh. In Bangladesh, all male mono-sex GIFT seed production by using 17-α methyl testosterone hormone is performed from the mid February to November, starting with egg collection. Smaller hatching trays or, jogs were used for the incubation of the collected eggs for 5 days which are eventually followed by incubation in the larger hatching trays for 36 to 48 hours until the yolk sac totally disappeared. The hormone mixed feed (contained 17-α Methyl testosterone (MT) hormone at the rate of 60-70 mg/Kg) was composed of 50% fishmeal, 30% wheat bran and 20% rice bran. The post larva were subjected to hormone mixed powdered feed for the first time after transferring them to transitory tanks and treated there for 5 days. Into the S.R.T. (Sex Reversal Treatment) ponds, further treatment was completed. There they fed frequent...
This study illustrates the potential application of geographic information systems (GIS) and spat... more This study illustrates the potential application of geographic information systems (GIS) and spatial analysis techniques to support the fisheries management. GIS aids are familiar as an influential tool to attain this purpose in aid of a well-versed management decision system. In this context the spatial component of fisheries comes to be a main concern and the whole discipline turn into highly compatible with GIS. Harmonized with this new leaning, the objective of this paper is to demonstrate an innovative way to employ the geographic information allied with fisheries data to effectually envision and enumerate temporal and spatial data arrays in fisheries events. The core utilities of the fishery GIS are catch and effort approximation and their disparity in space and time, fishing vessel utilization, data quality control and obtaining information on the site of significant economical and endangered species. The outputs formed through the GIS aids are appositely designed for additio...
International Journal of Fisheries and Aquatic Studies, 2017
Environmental issues are ignored in Bangladesh while considering aquaculture practices but unfort... more Environmental issues are ignored in Bangladesh while considering aquaculture practices but unfortunately the environment suffers the most because of over exploitation. The stress of aquaculture over environment starts with the collection of fish seed, because the natural water body is till now the prime source of aquaculture stocking materials. In aquaculture plenty of tons of water and exchange of that is needed periodically but in our country we have a very little or in most of the cases don't have any waste water treatment facility in hatcheries or culture farms and that's why recycle of waste water or treat water before discharge to the nature is not possible till now. In most cases, the used water or wastage of aquaculture is being released to the natural waterbody or main river stream without any treatment which leads to the disease outbreak, invasion of undesired species or foreign species, imbalance in biodiversity and ecosystem. Besides in our aquaculture a plenty o...
International Journal of Fisheries and Aquatic Studies, 2016
The present study was conducted for the review of present method practiced for all male mono-sex ... more The present study was conducted for the review of present method practiced for all male mono-sex GIFT seed production by using 17-α methyl testosterone hormone in Bangladesh. In Bangladesh, all male mono-sex GIFT seed production by using 17-α methyl testosterone hormone is performed from the mid February to November, starting with egg collection. Smaller hatching trays or, jogs were used for the incubation of the collected eggs for 5 days which are eventually followed by incubation in the larger hatching trays for 36 to 48 hours until the yolk sac totally disappeared. The hormone mixed feed (contained 17-α Methyl testosterone (MT) hormone at the rate of 60-70 mg/Kg) was composed of 50% fishmeal, 30% wheat bran and 20% rice bran. The post larva were subjected to hormone mixed powdered feed for the first time after transferring them to transitory tanks and treated there for 5 days. Into the S.R.T. (Sex Reversal Treatment) ponds, further treatment was completed. There they fed frequent...
Asian Journal of Fisheries and Aquatic Research, 2018
The current study was performed to monitor in situ condition and spatio-temporal modelling of the... more The current study was performed to monitor in situ condition and spatio-temporal modelling of the present status of water quality parameters of different spawning grounds and sanctuaries of Hilsha. The study was conducted in nine sites in lower Padma River (Maowa) to lower Meghna River (Bhola, Patuakhali) from 1 August 2015 to 31 January 2016. This study demonstrates surface water temperature, salinity, conductivity and transparency were ranged from 19.00-33.00°C, 0.10-2.90 ppt, 125.60-4720.00 µS/cm and 6.60-74.00 cm respectively. The values of pH, DO, free CO2, total alkalinity, total hardness and free NH3 were varied from 6.00-9.50, 4.50-11.60 mg/L, 3.46-24.00 mg/L, 33.00-172.50 mg/L, 34.20-1291.00 mg/L and 0.20-1.40 mg/L respectively. Moreover, water quality model reveals that the present status of some water quality parameters (free CO2, free NH3, transparency) deviated from optimum condition suitable for the normal physiological process and spawning of Hilsha.
International Journal of Fisheries and Aquatic Studies, 2017
At present the global milieu is extremely susceptible to the effects of climate change typically ... more At present the global milieu is extremely susceptible to the effects of climate change typically the fisheries sector owing to its economics, diets and social dependencies on fisheries and climate change is exerting an extra pressure over the many folds (fishing pressure, loss of habitat, pollution, disturbance and introduced species) and the fish stocks all over the world have already experienced the adversities. Besides, temperature rise, amplified irregularities in the rainfall pattern and frequency and harshness of life-threatening occurrences, upsurges of precipitation, tremendous flooding and salinity intrusions may have an undesirable impact on aquatic biota as well as fish. The utmost imperative effects of climate change in fisheries sector are – destruction of habitat, alteration of habitat conditions, disease outburst, obstacle in migration routes, hindrance in reproduction and finally reduced production. In Bangladesh climate changes also distresses the Sundarbans, the wo...
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