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Papers by Abu Hena Muhammad Yousuf
The Journal of NOAMI, 37(1-2):25-44, 2023
The Bay of Bengal (hereafter termed as BOB) is an area of the northern eastern part of Indian Oce... more The Bay of Bengal (hereafter termed as BOB) is an area of the northern eastern part of Indian Ocean (IO) where the northern BOB is the least studied area specially in respect of Water Masses (WM) formation and their spreading. The study has been conducted to identify the WM in the northern BOB where temperature and salinity profiles have been used to determine
the structural combination. Thus, the nomenclature of an undefined WM has been done. Due to lack of in situ data, monthly, and annual mean data of the World Ocean Atlas (WOA, 2018) (https://www.ncei.noaa.gov/products) data from http://apdrc.soest.hawaii.edu/tut/opendap.php have been utilized for the present study. According to the T-S diagram, the WM have been
substantiated. Bengal Bay WM, Indian Equatorial WM, Red Sea-Persian Gulf Intermediate WM, and Antarctic Intermediate WM have been determined explicitly. Two high salinity WM, Red Sea-Persian Gulf Intermediate WM, at 200-1400 m has been identified due to penetrating of the isohaline layer as the remnants of Arabian Sea. Specially, the unknown WM at depth 75-90 m along with temperature 23-25°C and salinity 34.4-34.6 psu has yet to be
defined WM. Primarily, the origin of this unknown WM has been identified from Arabian Sea. Therefore, the author has done the nomenclature of this unidentified WM as BANGABANDHU SHEIKH MUJIBUR RAHMAN – YOUSUF (BSMR-Y) WM.
Bangladesh Journal of Botany, 2014
The total caffeine content in Bangladesh Tea (BT) varieties (BT1-BT18) ranged from 1.59 ± 0.155 -... more The total caffeine content in Bangladesh Tea (BT) varieties (BT1-BT18) ranged from 1.59 ± 0.155 - 4.15 ± 0.399 g/100g of DM and the crude fat content in BT varieties varied from 6.69 ± 0.64 - 9.87 ± 0.9509 g/100g of dry material (DM). In this study, the highest amount of caffeine (4.15 ± 0.399 g/100g DM) was found in BT-16 variety (p < 0.05) while the highest amount of crude fat (9.24 ± 0.889g/100g DM) was found in BT 10 variety (p > 0.5). The total polyphenol content ranged:8.66 ± 0.831 - 14.89 ± 1.432 GAE; g/100 g DM. The highest amount of polyphenol was found in BT 9 variety (14.890 ± 1.432 GAE; g/100 g DM) (p < 0.05). DOI: http://dx.doi.org/10.3329/bjb.v42i2.18037 Bangladesh J. Bot. 42(2): 321-325, 2013 (December)
International convention on marine pollution provided less attention for the protection of the ma... more International convention on marine pollution provided less attention for the protection of the marine environment and of the high seas beyond coastal areas. The Stockholm Declaration on the Human Environment determined the concern regarding the whole marine environment, and emphatic reflection was done in the provisions of the Law of the Sea Convention. Eight heavy metals were analysed from both water and sediment samples of the Bay of Bengal (BoB). The decreasing trend of metals were observed in water samples: Zn (0.91±8.11) > Ni (0.78±0.72) > Cr (0.56±0.18) > Cu (0.16±0.24) > Pb (1.32±0.21) > As (1.14±0.95) > Hg (1.00±0.04) > Cd (0.07±0.03) μg/L and in sediment samples: Zn (46.53±23.57) > Cr (22.58±7.81) > Ni (21.17±12.17) > Pb (14.64±6.65) > Cu (13.04±8.19) > As (4.06±1.62) > Hg (0.03±0.02) > Cd (0.02±0.01) mg/kg. For the sustainability of the marine resources, the integration of Ecosystem Based Management and Marine Spatial Planning (EBM...
This study found that El Niño's teleconnections influence the climate extremes of Banglad... more This study found that El Niño's teleconnections influence the climate extremes of Bangladesh. According to El Niño-Southern Oscillation (ENSO) information and its analysis in the context of Bangladesh, negetive Southern Oscillation Index (SOI) (i.e. El Niño event) is generally associated with decreasing rainfall, whereas, positive Southern Oscillation Index (SOI) (i.e. La Niña event) results in increasing rainfall. In the perspective of Bangladesh, there is a moderate negative correlation coefficient (CC) between the values of Country Average Rainfall (CAR) and SOI (CC=-0.02). The data and information presented in this study does not clearly support the existence of a relationship between ENSO and drought/flood, whereas, IOD has more teleconnection with rainfall than ENSO. IOD has negative correlation with CAR and the correlation coefficient is-0.045.
A comparative studies regarding prevalence of microbial flora in the muscle of locally available ... more A comparative studies regarding prevalence of microbial flora in the muscle of locally available tiger shrimp (Penaeus monodon) and giant water prawn (Macrobrachium rosenbergii) have been analyzed in terms of aerobic plate count (APC), enterobacteriaceae and Salmonella-Shigella (SS) counts. The total counts ranged from 2.04x10 to 4.5x10 CFU/ml for shrimp and 1.08x10 to 1.2x10 CFU/ml for prawn. The total coliforms count 2 5 2 5 ranged between 5.4x10 and 8.5x10 cells for the shrimp and for the prawn 5x10 and 4.4x10 cells. Furthermore, 2 5 2 4 the Salmonella-Shigella (SS) count ranged from 0.2x10 to 1.1x10 cells for the shrimp and between 0.26x10 and 2 2 2 0.96x10 cells for the prawn. Sixteen isolates were characterized from all the samples on plate count agar with 4 percentage of different microbes characterized as follows: Staphylococcus auerus (6.25%), Salmonella sp. (25%), Shigella sp. (12.5%), Flavobacterium sp. (12.5%) and Vibrio sp. (43.75%). Results revealed that the microbial load found to be higher in samples taken from the departmental chain shops, without having proper treatment.
A study was undertaken to determine the most effective element among the commonly used antimicrob... more A study was undertaken to determine the most effective element among the commonly used antimicrobial agents, especially in the body muscle of black tiger shrimp (Penaeus monodon) and giant freshwater prawn (Macrobrachium rosenbergii) on the basis of different chemical interventions. Using 10 ppm calcium hypochlorite, the microbial load has been reduced more significantly (p>0.001) than trisodium phosphate, lactic acid, oxalic acid, sodium carbonate, potassium bicarbonate and acetic acid and as result the total plate count in the Penaeus monodon and Macrobrachium rosenbergii samples reduced by on average of 3.83 (99.53%) and 3.24 (95.5%) log CFU/g, respectively. Moreover, the aforementioned compound was also 10 found to be very effective against Escherichia coli and Vibrio spp i.e., the count of E. coli and Vibrio spp. reduced to nil or nearly nil.
Abstract: Identification of major taxa of meiobenthic fauna in relation to sediment gradients and... more Abstract: Identification of major taxa of meiobenthic fauna in relation to sediment gradients and water quality characteristics were carried out to the south-central coast of the Bay of Bengal (Hatiya, Noakhali), Bangladesh. Meiobenthic faunas were distributed more heterogeneously at a large-scale during pre-monsoon than post-monsoon. The higher abundance of meiobenthos was (372,690±50,147 ind/m2) during pre-monsoon than (282,351±33.783 ind/m2) in post-monsoon and more abundance of meiobenthos was found at Station-4 (Char Ishwar) and less abundance at Station-1 (Nalchira Ghat) during pre-monsoon and post-monsoon.
ABSTRACT A study was carried out to understand the population structure of shrimp (Penaeus monodo... more ABSTRACT A study was carried out to understand the population structure of shrimp (Penaeus monodon) and prawn (Macrobrachium rosenbergii) samples from different habitats. The samples were collected from fresh, estuarine and marine water habitats, local markets and departmental chain shops of Dhaka from December, 2005 to October, 2006. The genetic variations of the two species were studied by DNA fingerprinting. For DNA isolation three methods were applied viz., CTAB method, DNAzol reagent used procedure and cell lysis buffer usage method. Among methods used, the cell lysis buffer usage method yielded better results and proved its appropriacy within a short time. The PCR technique has also been standardized by using RAPD markers. For the DNA fingerprinting, the isolated DNA was then subjected to DNA typing by PCR, using RAPD and SSR markers. The study was conducted using 19 RAPD primers; where scoring was done in 8-12 individuals at each of the locations. In case of RAPD primer 7 primers showed amplification. During the study, polymorphisms were detected between and within species. DNA from 2 genotypes of the shrimp species and 1 genotype of the prawn species was used in this assay. Results showed that the level of variation between species is high. On the contrary, genetic variability present at the intraspecific level is low. The resulting dendrogram showed that the shrimp from Satkhira and Cox's Bazar has common ancestral origin i.e. they are very close group and prawn from Noakhali exists as a different group. The results revealed that there is a significant interpopulation genetic variability in the present study, confirming INTRODUCTION
World Journal of Fish and Marine Sciences, 2020
In this study, fish marketing efficiency and quality of three affluent departmental stores (Meena... more In this study, fish marketing efficiency and quality of three affluent departmental stores
(Meena Bazaars, Agora Super shops, Shwapno) and retailer market surrounding w holesale market in
Dhaka (Bangladesh) were investigated. It was found that a significant amount of fish was supplied to these
wholesale markets from several coastal districts like chattogram, Khulna, Barishal, Khulna, Mymenshing,
Satkhira, Bhola, Teknaf, Potuakhali, Patharghata, Hatiya, Monpura, Chandpur, Bagerhat, India & Myanmar, etc.
Then the retailer market & departmental stores collect the fish species from the wholesale market. But the
departmental store collects fish species from foreign source also. The species-wise prices of fish varied from
8% to 45% from retailer market to departmental store and the variation are very high due to marketing strategy,
arrangement, management & distribution of departmental stores. This study also reveals that, the average retail
price of Hilsha fish in departmental stores is 1813tk/kg and in retailer markets, it is 1054tk/kg, for Sea bass in
departmental store=651tk/kg and retailer markets=516tk/kg, for Silver Pomfret in departmental stores=896tk/kg
and retailer markets=729tk/kg, For Red croaker in departmental stores=391tk/kg and retailer markets=149tk/kg,
for Mackerel in departmental stores=348tk/kg and retailer markets=216tk/kg, for Catfish in departmental
stores=403tk/kg and retailer markets=194tk/kg, for Shrimp in departmental stores=738tk/kg and retailer
markets=630tk/kg. The percentile price variations for Hilsha is 43%, Sea bass 8%, Silver Pomfret 9%, Red
Croaker 14%, Mackerel 8%, Catfish 12% and for Shrimp 6% between departmental stores and retailer markets.
The correlation between wholesale markets and departmental stores is 0.775, which is a positive correlation that
means the increase in prices in departmental stores increase with retailer markets and this is statistically
significant (0.05 level) and the value is 0.041 (2 tailed). And the correlation between wholesale markets and
retailer markets is 0.940 which shows strong positive correlation and statistically significant (0.002) at 0.01 level.
The ANOVA test reveals the means of three groups (wholesale market, retailer market, departmental store)
cannot reject the null hypothesis where the p-value=0.295.
Journal of Oceanography & Marine Environmental System, 2020
Abstract: Identification of major taxa of meiobenthic fauna in relation to sediment gradients and... more Abstract: Identification of major taxa of meiobenthic fauna in relation to sediment gradients and water quality
characteristics were carried out to the south-central coast of the Bay of Bengal (Hatiya, Noakhali), Bangladesh.
Meiobenthic faunas were distributed more heterogeneously at a large-scale during pre-monsoon than
post-monsoon. The higher abundance of meiobenthos was (372,690±50,147 ind/m2) during pre-monsoon
than (282,351±33.783 ind/m2) in post-monsoon and more abundance of meiobenthos was found at Station-4
(Char Ishwar) and less abundance at Station-1 (Nalchira Ghat) during pre-monsoon and post-monsoon.
The Journal of NOAMI, 2018
ABSTRACT The study was accomplished to explore the current marine fish marketing strategy in four... more ABSTRACT
The study was accomplished to explore the current marine fish marketing strategy in four major fish landing stations Karwan Bazar (Station, S–1), Jatrabari (S–2), Swarighat (S–3), and Gabtoli (S–4) in Dhaka City. The period of collecting data was taken straight away during the off-season (January-March 2018) and peak season (September 2018). Percentage of estimated marine fishes are about 18% Hilsha, 10% Shrimp, 11% Chinese pomfret, 12% Silver Pomfret, 5% Shad, 6% Red Croaker, 5% Catfish, 3% Tuna, 5% Loittya, 7% Seabass, 2% Shaplapata, 2% Baila, 5% Mackerel, 6% Chhuri, 1% Kakila, 1% Chandani, and 1% Salmon. Among those the most popular Hilsha fish the collecting-retailer price variation was 76% at Karwan Bazar, 58% at Jatrabari, 35% at Swarighat and 30% at Gabtoli. On an average (peak & off-season) the collecting price of Hilsha for four fish landing stations was S1= 550tk/kg, S2=616tk/kg, S3=806tk/kg & S4=683tk/kg; retailer price was S1=1066tk/kg, S2=1116tk/kg, S3=1150tk/kg and S4=883tk/kg. Some exclusive exceptions were found in less expensive fishes like Chapila, Loitya, Surmaand Red Croaker that price varies greatly in-between collecting and wholesale price ranging 200% to 70% on an average, which is very high due to high price fluctuation between intermediaries. The supply chain went consecutively from producers to retailers across miscellaneous intermediaries; Traders, Brokers, Aratdars, Mahajans, Wholesalers, and Retailers. The variety of personnel engaged intricate strata in the market profile like Muhuri, Koyal, Sardar, Lineman, and Laborers having different salary levels. Major constraints of the study areas were poor drainage, transportation, nonhygienic environment, clean water supply, icing facilities etc.
Keywords: Strategic Marketing, Price Variation, Marketing Channel, Wholesale.
A study was undertaken to determine the most effective element among the commonly used antimicrob... more A study was undertaken to determine the most effective element among the commonly used antimicrobial agents, especially in the body muscle of black tiger shrimp (Penaeus monodon) and giant freshwater prawn (Macrobrachium rosenbergii) on the basis of different chemical interventions. Using 10 ppm calcium hypochlorite, the microbial load has been reduced more significantly (p>0.001) than trisodium phosphate, lactic acid, oxalic acid, sodium carbonate, potassium bicarbonate and acetic acid and as result the total plate count in the Penaeus monodon and Macrobrachium rosenbergii samples reduced by on average of 3.83 (99.53%) and 3.24 (95.5%) log CFU/g, respectively. Moreover, the aforementioned compound was also 10 found to be very effective against Escherichia coli and Vibrio spp i.e., the count of E. coli and Vibrio spp. reduced to nil or nearly nil.
A study was carried out to understand the population structure of shrimp (Penaeus monodon) and pr... more A study was carried out to understand the population structure of shrimp (Penaeus monodon) and prawn (Macrobrachium rosenbergii) samples from different habitats. The samples were collected from fresh, estuarine and marine water habitats, local markets and departmental chain shops of Dhaka from December, 2005 to October, 2006. The genetic variations of the two species were studied by DNA fingerprinting. For DNA isolation three methods were applied viz., CTAB method, DNAzol reagent used procedure and cell lysis buffer usage method. Among methods used, the cell lysis buffer usage method yielded better results and proved its appropriacy within a short time. The PCR technique has also been standardized by using RAPD markers. For the DNA fingerprinting, the isolated DNA was then subjected to DNA typing by PCR, using RAPD and SSR markers. The study was conducted using 19 RAPD primers; where scoring was done in 8-12 individuals at each of the locations. In case of RAPD primer 7 primers showed amplification. During the study, polymorphisms were detected between and within species. DNA from 2 genotypes of the shrimp species and 1 genotype of the prawn species was used in this assay. Results showed that the level of variation between species is high. On the contrary, genetic variability present at the intraspecific level is low. The resulting dendrogram showed that the shrimp from Satkhira and Cox's Bazar has common ancestral origin i.e. they are very close group and prawn from Noakhali exists as a different group. The results revealed that there is a significant interpopulation genetic variability in the present study, confirming
A comparative studies regarding prevalence of microbial flora in the muscle of locally available ... more A comparative studies regarding prevalence of microbial flora in the muscle of locally available tiger shrimp (Penaeus monodon) and giant water prawn (Macrobrachium rosenbergii)
This study found that El Niño's teleconnections influence the climate extremes of Bangladesh. Acc... more This study found that El Niño's teleconnections influence the climate extremes of Bangladesh. According to El Niño-Southern Oscillation (ENSO) information and its analysis in the context of Bangladesh, negetive Southern Oscillation Index (SOI) (i.e. El Niño event) is generally associated with decreasing rainfall, whereas, positive Southern Oscillation Index (SOI) (i.e. La Niña event) results in increasing rainfall. In the perspective of Bangladesh, there is a moderate negative correlation coefficient (CC) between the values of Country Average Rainfall (CAR) and SOI (CC=-0.02). The data and information presented in this study does not clearly support the existence of a relationship between ENSO and drought/flood, whereas, IOD has more teleconnection with rainfall than ENSO. IOD has negative correlation with CAR and the correlation coefficient is-0.045.
The Journal of NOAMI, 37(1-2):25-44, 2023
The Bay of Bengal (hereafter termed as BOB) is an area of the northern eastern part of Indian Oce... more The Bay of Bengal (hereafter termed as BOB) is an area of the northern eastern part of Indian Ocean (IO) where the northern BOB is the least studied area specially in respect of Water Masses (WM) formation and their spreading. The study has been conducted to identify the WM in the northern BOB where temperature and salinity profiles have been used to determine
the structural combination. Thus, the nomenclature of an undefined WM has been done. Due to lack of in situ data, monthly, and annual mean data of the World Ocean Atlas (WOA, 2018) (https://www.ncei.noaa.gov/products) data from http://apdrc.soest.hawaii.edu/tut/opendap.php have been utilized for the present study. According to the T-S diagram, the WM have been
substantiated. Bengal Bay WM, Indian Equatorial WM, Red Sea-Persian Gulf Intermediate WM, and Antarctic Intermediate WM have been determined explicitly. Two high salinity WM, Red Sea-Persian Gulf Intermediate WM, at 200-1400 m has been identified due to penetrating of the isohaline layer as the remnants of Arabian Sea. Specially, the unknown WM at depth 75-90 m along with temperature 23-25°C and salinity 34.4-34.6 psu has yet to be
defined WM. Primarily, the origin of this unknown WM has been identified from Arabian Sea. Therefore, the author has done the nomenclature of this unidentified WM as BANGABANDHU SHEIKH MUJIBUR RAHMAN – YOUSUF (BSMR-Y) WM.
Bangladesh Journal of Botany, 2014
The total caffeine content in Bangladesh Tea (BT) varieties (BT1-BT18) ranged from 1.59 ± 0.155 -... more The total caffeine content in Bangladesh Tea (BT) varieties (BT1-BT18) ranged from 1.59 ± 0.155 - 4.15 ± 0.399 g/100g of DM and the crude fat content in BT varieties varied from 6.69 ± 0.64 - 9.87 ± 0.9509 g/100g of dry material (DM). In this study, the highest amount of caffeine (4.15 ± 0.399 g/100g DM) was found in BT-16 variety (p < 0.05) while the highest amount of crude fat (9.24 ± 0.889g/100g DM) was found in BT 10 variety (p > 0.5). The total polyphenol content ranged:8.66 ± 0.831 - 14.89 ± 1.432 GAE; g/100 g DM. The highest amount of polyphenol was found in BT 9 variety (14.890 ± 1.432 GAE; g/100 g DM) (p < 0.05). DOI: http://dx.doi.org/10.3329/bjb.v42i2.18037 Bangladesh J. Bot. 42(2): 321-325, 2013 (December)
International convention on marine pollution provided less attention for the protection of the ma... more International convention on marine pollution provided less attention for the protection of the marine environment and of the high seas beyond coastal areas. The Stockholm Declaration on the Human Environment determined the concern regarding the whole marine environment, and emphatic reflection was done in the provisions of the Law of the Sea Convention. Eight heavy metals were analysed from both water and sediment samples of the Bay of Bengal (BoB). The decreasing trend of metals were observed in water samples: Zn (0.91±8.11) > Ni (0.78±0.72) > Cr (0.56±0.18) > Cu (0.16±0.24) > Pb (1.32±0.21) > As (1.14±0.95) > Hg (1.00±0.04) > Cd (0.07±0.03) μg/L and in sediment samples: Zn (46.53±23.57) > Cr (22.58±7.81) > Ni (21.17±12.17) > Pb (14.64±6.65) > Cu (13.04±8.19) > As (4.06±1.62) > Hg (0.03±0.02) > Cd (0.02±0.01) mg/kg. For the sustainability of the marine resources, the integration of Ecosystem Based Management and Marine Spatial Planning (EBM...
This study found that El Niño's teleconnections influence the climate extremes of Banglad... more This study found that El Niño's teleconnections influence the climate extremes of Bangladesh. According to El Niño-Southern Oscillation (ENSO) information and its analysis in the context of Bangladesh, negetive Southern Oscillation Index (SOI) (i.e. El Niño event) is generally associated with decreasing rainfall, whereas, positive Southern Oscillation Index (SOI) (i.e. La Niña event) results in increasing rainfall. In the perspective of Bangladesh, there is a moderate negative correlation coefficient (CC) between the values of Country Average Rainfall (CAR) and SOI (CC=-0.02). The data and information presented in this study does not clearly support the existence of a relationship between ENSO and drought/flood, whereas, IOD has more teleconnection with rainfall than ENSO. IOD has negative correlation with CAR and the correlation coefficient is-0.045.
A comparative studies regarding prevalence of microbial flora in the muscle of locally available ... more A comparative studies regarding prevalence of microbial flora in the muscle of locally available tiger shrimp (Penaeus monodon) and giant water prawn (Macrobrachium rosenbergii) have been analyzed in terms of aerobic plate count (APC), enterobacteriaceae and Salmonella-Shigella (SS) counts. The total counts ranged from 2.04x10 to 4.5x10 CFU/ml for shrimp and 1.08x10 to 1.2x10 CFU/ml for prawn. The total coliforms count 2 5 2 5 ranged between 5.4x10 and 8.5x10 cells for the shrimp and for the prawn 5x10 and 4.4x10 cells. Furthermore, 2 5 2 4 the Salmonella-Shigella (SS) count ranged from 0.2x10 to 1.1x10 cells for the shrimp and between 0.26x10 and 2 2 2 0.96x10 cells for the prawn. Sixteen isolates were characterized from all the samples on plate count agar with 4 percentage of different microbes characterized as follows: Staphylococcus auerus (6.25%), Salmonella sp. (25%), Shigella sp. (12.5%), Flavobacterium sp. (12.5%) and Vibrio sp. (43.75%). Results revealed that the microbial load found to be higher in samples taken from the departmental chain shops, without having proper treatment.
A study was undertaken to determine the most effective element among the commonly used antimicrob... more A study was undertaken to determine the most effective element among the commonly used antimicrobial agents, especially in the body muscle of black tiger shrimp (Penaeus monodon) and giant freshwater prawn (Macrobrachium rosenbergii) on the basis of different chemical interventions. Using 10 ppm calcium hypochlorite, the microbial load has been reduced more significantly (p>0.001) than trisodium phosphate, lactic acid, oxalic acid, sodium carbonate, potassium bicarbonate and acetic acid and as result the total plate count in the Penaeus monodon and Macrobrachium rosenbergii samples reduced by on average of 3.83 (99.53%) and 3.24 (95.5%) log CFU/g, respectively. Moreover, the aforementioned compound was also 10 found to be very effective against Escherichia coli and Vibrio spp i.e., the count of E. coli and Vibrio spp. reduced to nil or nearly nil.
Abstract: Identification of major taxa of meiobenthic fauna in relation to sediment gradients and... more Abstract: Identification of major taxa of meiobenthic fauna in relation to sediment gradients and water quality characteristics were carried out to the south-central coast of the Bay of Bengal (Hatiya, Noakhali), Bangladesh. Meiobenthic faunas were distributed more heterogeneously at a large-scale during pre-monsoon than post-monsoon. The higher abundance of meiobenthos was (372,690±50,147 ind/m2) during pre-monsoon than (282,351±33.783 ind/m2) in post-monsoon and more abundance of meiobenthos was found at Station-4 (Char Ishwar) and less abundance at Station-1 (Nalchira Ghat) during pre-monsoon and post-monsoon.
ABSTRACT A study was carried out to understand the population structure of shrimp (Penaeus monodo... more ABSTRACT A study was carried out to understand the population structure of shrimp (Penaeus monodon) and prawn (Macrobrachium rosenbergii) samples from different habitats. The samples were collected from fresh, estuarine and marine water habitats, local markets and departmental chain shops of Dhaka from December, 2005 to October, 2006. The genetic variations of the two species were studied by DNA fingerprinting. For DNA isolation three methods were applied viz., CTAB method, DNAzol reagent used procedure and cell lysis buffer usage method. Among methods used, the cell lysis buffer usage method yielded better results and proved its appropriacy within a short time. The PCR technique has also been standardized by using RAPD markers. For the DNA fingerprinting, the isolated DNA was then subjected to DNA typing by PCR, using RAPD and SSR markers. The study was conducted using 19 RAPD primers; where scoring was done in 8-12 individuals at each of the locations. In case of RAPD primer 7 primers showed amplification. During the study, polymorphisms were detected between and within species. DNA from 2 genotypes of the shrimp species and 1 genotype of the prawn species was used in this assay. Results showed that the level of variation between species is high. On the contrary, genetic variability present at the intraspecific level is low. The resulting dendrogram showed that the shrimp from Satkhira and Cox's Bazar has common ancestral origin i.e. they are very close group and prawn from Noakhali exists as a different group. The results revealed that there is a significant interpopulation genetic variability in the present study, confirming INTRODUCTION
World Journal of Fish and Marine Sciences, 2020
In this study, fish marketing efficiency and quality of three affluent departmental stores (Meena... more In this study, fish marketing efficiency and quality of three affluent departmental stores
(Meena Bazaars, Agora Super shops, Shwapno) and retailer market surrounding w holesale market in
Dhaka (Bangladesh) were investigated. It was found that a significant amount of fish was supplied to these
wholesale markets from several coastal districts like chattogram, Khulna, Barishal, Khulna, Mymenshing,
Satkhira, Bhola, Teknaf, Potuakhali, Patharghata, Hatiya, Monpura, Chandpur, Bagerhat, India & Myanmar, etc.
Then the retailer market & departmental stores collect the fish species from the wholesale market. But the
departmental store collects fish species from foreign source also. The species-wise prices of fish varied from
8% to 45% from retailer market to departmental store and the variation are very high due to marketing strategy,
arrangement, management & distribution of departmental stores. This study also reveals that, the average retail
price of Hilsha fish in departmental stores is 1813tk/kg and in retailer markets, it is 1054tk/kg, for Sea bass in
departmental store=651tk/kg and retailer markets=516tk/kg, for Silver Pomfret in departmental stores=896tk/kg
and retailer markets=729tk/kg, For Red croaker in departmental stores=391tk/kg and retailer markets=149tk/kg,
for Mackerel in departmental stores=348tk/kg and retailer markets=216tk/kg, for Catfish in departmental
stores=403tk/kg and retailer markets=194tk/kg, for Shrimp in departmental stores=738tk/kg and retailer
markets=630tk/kg. The percentile price variations for Hilsha is 43%, Sea bass 8%, Silver Pomfret 9%, Red
Croaker 14%, Mackerel 8%, Catfish 12% and for Shrimp 6% between departmental stores and retailer markets.
The correlation between wholesale markets and departmental stores is 0.775, which is a positive correlation that
means the increase in prices in departmental stores increase with retailer markets and this is statistically
significant (0.05 level) and the value is 0.041 (2 tailed). And the correlation between wholesale markets and
retailer markets is 0.940 which shows strong positive correlation and statistically significant (0.002) at 0.01 level.
The ANOVA test reveals the means of three groups (wholesale market, retailer market, departmental store)
cannot reject the null hypothesis where the p-value=0.295.
Journal of Oceanography & Marine Environmental System, 2020
Abstract: Identification of major taxa of meiobenthic fauna in relation to sediment gradients and... more Abstract: Identification of major taxa of meiobenthic fauna in relation to sediment gradients and water quality
characteristics were carried out to the south-central coast of the Bay of Bengal (Hatiya, Noakhali), Bangladesh.
Meiobenthic faunas were distributed more heterogeneously at a large-scale during pre-monsoon than
post-monsoon. The higher abundance of meiobenthos was (372,690±50,147 ind/m2) during pre-monsoon
than (282,351±33.783 ind/m2) in post-monsoon and more abundance of meiobenthos was found at Station-4
(Char Ishwar) and less abundance at Station-1 (Nalchira Ghat) during pre-monsoon and post-monsoon.
The Journal of NOAMI, 2018
ABSTRACT The study was accomplished to explore the current marine fish marketing strategy in four... more ABSTRACT
The study was accomplished to explore the current marine fish marketing strategy in four major fish landing stations Karwan Bazar (Station, S–1), Jatrabari (S–2), Swarighat (S–3), and Gabtoli (S–4) in Dhaka City. The period of collecting data was taken straight away during the off-season (January-March 2018) and peak season (September 2018). Percentage of estimated marine fishes are about 18% Hilsha, 10% Shrimp, 11% Chinese pomfret, 12% Silver Pomfret, 5% Shad, 6% Red Croaker, 5% Catfish, 3% Tuna, 5% Loittya, 7% Seabass, 2% Shaplapata, 2% Baila, 5% Mackerel, 6% Chhuri, 1% Kakila, 1% Chandani, and 1% Salmon. Among those the most popular Hilsha fish the collecting-retailer price variation was 76% at Karwan Bazar, 58% at Jatrabari, 35% at Swarighat and 30% at Gabtoli. On an average (peak & off-season) the collecting price of Hilsha for four fish landing stations was S1= 550tk/kg, S2=616tk/kg, S3=806tk/kg & S4=683tk/kg; retailer price was S1=1066tk/kg, S2=1116tk/kg, S3=1150tk/kg and S4=883tk/kg. Some exclusive exceptions were found in less expensive fishes like Chapila, Loitya, Surmaand Red Croaker that price varies greatly in-between collecting and wholesale price ranging 200% to 70% on an average, which is very high due to high price fluctuation between intermediaries. The supply chain went consecutively from producers to retailers across miscellaneous intermediaries; Traders, Brokers, Aratdars, Mahajans, Wholesalers, and Retailers. The variety of personnel engaged intricate strata in the market profile like Muhuri, Koyal, Sardar, Lineman, and Laborers having different salary levels. Major constraints of the study areas were poor drainage, transportation, nonhygienic environment, clean water supply, icing facilities etc.
Keywords: Strategic Marketing, Price Variation, Marketing Channel, Wholesale.
A study was undertaken to determine the most effective element among the commonly used antimicrob... more A study was undertaken to determine the most effective element among the commonly used antimicrobial agents, especially in the body muscle of black tiger shrimp (Penaeus monodon) and giant freshwater prawn (Macrobrachium rosenbergii) on the basis of different chemical interventions. Using 10 ppm calcium hypochlorite, the microbial load has been reduced more significantly (p>0.001) than trisodium phosphate, lactic acid, oxalic acid, sodium carbonate, potassium bicarbonate and acetic acid and as result the total plate count in the Penaeus monodon and Macrobrachium rosenbergii samples reduced by on average of 3.83 (99.53%) and 3.24 (95.5%) log CFU/g, respectively. Moreover, the aforementioned compound was also 10 found to be very effective against Escherichia coli and Vibrio spp i.e., the count of E. coli and Vibrio spp. reduced to nil or nearly nil.
A study was carried out to understand the population structure of shrimp (Penaeus monodon) and pr... more A study was carried out to understand the population structure of shrimp (Penaeus monodon) and prawn (Macrobrachium rosenbergii) samples from different habitats. The samples were collected from fresh, estuarine and marine water habitats, local markets and departmental chain shops of Dhaka from December, 2005 to October, 2006. The genetic variations of the two species were studied by DNA fingerprinting. For DNA isolation three methods were applied viz., CTAB method, DNAzol reagent used procedure and cell lysis buffer usage method. Among methods used, the cell lysis buffer usage method yielded better results and proved its appropriacy within a short time. The PCR technique has also been standardized by using RAPD markers. For the DNA fingerprinting, the isolated DNA was then subjected to DNA typing by PCR, using RAPD and SSR markers. The study was conducted using 19 RAPD primers; where scoring was done in 8-12 individuals at each of the locations. In case of RAPD primer 7 primers showed amplification. During the study, polymorphisms were detected between and within species. DNA from 2 genotypes of the shrimp species and 1 genotype of the prawn species was used in this assay. Results showed that the level of variation between species is high. On the contrary, genetic variability present at the intraspecific level is low. The resulting dendrogram showed that the shrimp from Satkhira and Cox's Bazar has common ancestral origin i.e. they are very close group and prawn from Noakhali exists as a different group. The results revealed that there is a significant interpopulation genetic variability in the present study, confirming
A comparative studies regarding prevalence of microbial flora in the muscle of locally available ... more A comparative studies regarding prevalence of microbial flora in the muscle of locally available tiger shrimp (Penaeus monodon) and giant water prawn (Macrobrachium rosenbergii)
This study found that El Niño's teleconnections influence the climate extremes of Bangladesh. Acc... more This study found that El Niño's teleconnections influence the climate extremes of Bangladesh. According to El Niño-Southern Oscillation (ENSO) information and its analysis in the context of Bangladesh, negetive Southern Oscillation Index (SOI) (i.e. El Niño event) is generally associated with decreasing rainfall, whereas, positive Southern Oscillation Index (SOI) (i.e. La Niña event) results in increasing rainfall. In the perspective of Bangladesh, there is a moderate negative correlation coefficient (CC) between the values of Country Average Rainfall (CAR) and SOI (CC=-0.02). The data and information presented in this study does not clearly support the existence of a relationship between ENSO and drought/flood, whereas, IOD has more teleconnection with rainfall than ENSO. IOD has negative correlation with CAR and the correlation coefficient is-0.045.
Transnational Environmental Law, 2020
According to National Centre for Ecological Analysis and Synthesis, Marine ecology and ecosystems... more According to National Centre for Ecological Analysis and Synthesis, Marine ecology and ecosystems are preponderantly threatened by a suite of anthropogenic stressors which are sometimes transboundary, and their consequences will become more severe and complicated if not properly subdued. Mitigating multiple threats, for instance, the colossal upsurge of sea surface temperature (SST), demersal destructive fishing, and point-source organic pollution is a daunting task, particularly when multitudinous factors are addressed, such as ocean dumping – responsible for the promotion of radioactive substances along with thermal pollution, land runoff with unexpected level of nutrients and sediments, dredging, enhancing ocean acidification and the concentration of Nitrogen Oxides (NOx) and Sulfur Oxides (SOx) – the two main pollutants found in shipping emissions, ozone depleting substances, oil spills, plastic pollution.
https://researchdirect.westernsydney.edu.au/islandora/object/uws:70680, 2023
In the contemporary world, oceans are increasingly realized as ‘threatened places’ in need of env... more In the contemporary world, oceans are increasingly realized as ‘threatened places’ in need of environmental protection, at risk from pollution, habitat loss, and overfishing. On the other hand, nations around the world are turning their attention to oceans as a new source of economic development and growth, seeing them as ‘industrialized spaces’. The concept of integrating Ecosystem-Based Management (EBM) and Marine Spatial Planning (MSP) is a new approach for sustainable Ocean Governance (SOG). As an effective strategic tool for planning and managing conflicting ocean uses and their interactions with marine ecosystems, the EBM-MSP approach creates an opportunity for long-term development in relation to ocean and its resources. This thesis scrutinizes the contemporary concepts, definitions, and approaches pertinent to the establishment of a comprehensive Ecosystem-based Management and Marine Spatial Planning (EBM-MSP) framework for Sustainable Ocean Governance that reflects global and regional standards. The study also analyses various scientific data – especially the pollutants’ concentration at spatial and temporal scales – with special reference to EBM-MSP.
The research analyses international laws, declarations, conventions, and agreements that are relevant to the proposition of a new dynamic approach to SOG based on EBM-MSP. This new approach could be useful to support necessary reforms, filling gaps in legal regimes and achieving integrated and effective ocean governance mechanisms to prevent, reduce, and control pollution in the marine environment, as well as promoting sustainable exploration of marine resources. The research identifies challenges and opportunities in the legal, regulatory, and institutional gaps for the application of SOG in the Bay of Bengal (BOB) region specific to Bangladesh. It proposes that this could be done using a multi-regulatory level governance perspective that integrates global, regional, national, and local sources of law and policy.
Specifically, the research critically analyses the existing legal frameworks in relation to SOG in the Bay of Bengal (BOB). Based on an analysis of sectoral legislation and institutional arrangements in the BOB, the thesis recommends the modification and adoption of legislation, as well as integration among the relevant departments of Bangladesh Government, to match transboundary SOG, particularly along with EBM-MSP development processes. The study focuses on national policies and strategies along with sectoral legislation and institutional
SCHOOL OF LAW, WESTERN SYDNEY UNIVERSITY, AUSTRALIA vi
arrangements to contribute towards EBM-MSP at national level for SOG, by considering socioeconomic balance and jurisdictional overlays.
Based on experiences in the Baltic Sea, Mediterranean Sea, and Great Barrier Reef Marine Park (GBRMP), the research determines numerous key features to assist with the generation and application of EBM-MSP in the BOB region, specifically in Bangladesh, by integrating EBM-MSP with particular reference to a Comprehensive Ocean Zoning (COZ). The substantial outcome of the study is to suggest a COZ Framework for Bangladesh to protect priority seascapes and sites, species of special concern, and their critical habitats, by designing Marine Protected Area networks throughout the transboundary coast.