Prof. Dr. Md. Ali Reza Faruk (original) (raw)

Papers by Prof. Dr. Md. Ali Reza Faruk

International Journal of Fisheries and Aquatic Studies, Jul 1, 2016

Bacterial samples had been isolated from clinically detected diseased juvenile Pangasius, collect... more Bacterial samples had been isolated from clinically detected diseased juvenile Pangasius, collected from Mymensingh, Bangladesh. Primarily, the isolates were found as Gram-negative, motile, oxidase-positive, fermentative, and O/129 resistant Aeromonas bacteria. The species was exposed as Aeromonas hydrophila from esculin hydrolysis test. Ten isolates of A. hydrophila were identified from eye lesions, kidney, and liver of the infected fishes. Further characterization of A. hydrophila was accomplished using API-20E and antibiotic sensitivity test. Isolates were highly resistant to amoxyclav among ten different antibiotics. All isolates were found as immensely pathogenic to healthy fishes while intraperitoneal injection. Histopathologically, necrotic hematopoietic tissues with pyknotic nuclei, mild hemorrhage, and wide vacuolation in kidney, liver, and muscle were principally noticed due to Aeromonad infection. So far, this is the first full note on characterizing A. hydrophila from diseased farmed Pangasius in Bangladesh. The present findings will provide further direction to develop theranostic strategies of A. hydrophila infection.

Pakistan Journal of Biological Sciences, Jan 15, 2002

SAARC Journal of Agriculture, Jul 11, 2021

Immunostimulants have been used as a prospective substance against several disease events in aqua... more Immunostimulants have been used as a prospective substance against several disease events in aquaculture, although subsequent impact is not clearly explored yet. The present study was conducted to investigate the use of immunostimulants for fish health management in Mymensingh district of Bangladesh. Questionnaire survey was performed with a total of 40 fish farmers and 20 chemical and drug retailers. Altogether, 41 immunostimulants under 7 different categories including glucans and polysaccharides, vitamins, minerals, vitamin-mineral premixes, enzymes, nucleic acids and plant extracts were reported. ACI, Eon, Acme, Square, Renata and SK+F were noticed as the prominent sources among 24 listed companies in this study. The most frequently used immunostimulants were recorded as Megavit-aqua (88.75%), Multivitamin (87.5%), Aqua-boost (87.25%), Eskalina (83.25%) and Eon fish grower (82.5%). Farmers in this study mentioned about improved health condition with lower average disease incidence (29.3%) and reduced mortality (65.35%) in fish after application of immunostimulant. The findings of this study will be useful to perform further research regarding the efficacy and impacts of a wide range of immunostimulants used in aquaculture of Bangladesh.

Journal of the Bangladesh Agricultural University, 2017

Tilapia (Oreochromis niloticus) and pangasius (Pangasianodon hypophthalmus) are currently very im... more Tilapia (Oreochromis niloticus) and pangasius (Pangasianodon hypophthalmus) are currently very important and popular species for aquaculture inBangladesh. They are cultured commercially in high stocking densities which are accompanied by several risk factors leading to disease outbreaks. The present study was carried out to investigate diseases of these two species under farming condition with special emphasis on risk factors analysis and their health management strategies. Data were collected through questionnaire interview and focus group discussion with farmers. Altogether 50 farmers were interviewed of which 25 were tilapia farmers and 25 were pangus farmers in Trishal upazila of Mymensingh district. Possible risks were assessed using certain parameters like season of disease occurrence, presence of predators in farms, contact with livestock, maintenance of farm hygiene, sharing of farming tools, feeding of fish and pond management measures. It was found that presence of predato...

bfrf.org

A study has been carried out to evaluate the marketing of marine mollusc in Bangladesh coast duri... more A study has been carried out to evaluate the marketing of marine mollusc in Bangladesh coast during April-December, 2005. Different Participatory Rural Appraisal (PRA) tools, namelyquestionnaire interview, Focus Group Discussion (FGD), market visit and case studies have been employed in the coastal areas of Cox's Bazar, Chittagong, Khulna, Satkhira and Bagherhat. This study identified a range of mollusc species exploited at the Bangladesh coast and investigated their utilizations for edible and non edible purposes. Mollusc species of commercial importance identified are clam, green mussel, oyster, cockle, karotal, laza, kostura, kata shamuk and kori. The mollusc shells collected in the coastal areas are used in many different purposes, like, making poultry and fish feed, lime production, ornamental usage, paint making etc. People from Rakhaing and some other tribes of the coast traditionally have long been harvesting green mussel, clam and oyster for their household consumption. In addition, mollusc meat is used in the coastal shrimp and prawn hatcheries as feed for mother shrimp/prawn. Mollusc harvesters are mainly the coastal poor community and they harvest by hand and nets from coastal channels and muddy soil. Small but long established market chains have been found in Moheshkhali, Chaufaldandi, Ramu, Borobazar and Burmese Market Para in Cox's Bazar, Patia in Chittagonj, Sarnkhola and Morelgonj in Bagerhat, Paikgachha, Chandkhali and Koira in Khulna, and Munshigonj, Shyamnagar and Kaligonj in Satkhira district. The main harvest season for mollusc is winter and early summer (November-March). The main profession of many of the Rakhaing households in Cox's Bazar and Rajbangshi of Satkhira is mollusc collection. It was found that the bulk of natural harvest of mollusc shell go to the fish and poultry feed industries, the second important market is lime preparation industry followed by ornamental and decorative usages. The shells are also found to be used for making paint. The people in Rakhaing use meat for their daily consumption as well as sell to the community. The main dishes prepared from mollusc meat are chartni, curry, bhuna, light fry and chop. The quality of meat remain acceptable to the consumers for 2 days without any freezing and preservation then started to deteriorate and could be detected by bad smell. The price fluctuates based on the supply, demand and harvesting season. The stakeholders in the mollusc market chain identified are mollusc harvesters/collectors, wholesalers, retailers and consumers. No well organized market structure and practices were found for marine mollusc. The study identified the different distribution channels and value addition in each of the channels. The shell goes distance places by truck and boat. Variations were found in the distribution channels and prices in the study areas. Based on the interview, FGD and market visit with different stakeholders involved in mollusc industry, the total usage is estimated to be 1,130 MT per year. The study reveals that the market margin and value addition of mollusc muscle at different stages of marketing chain are 38.57% and 100% (Harvesting stage), 326.49% and 534.86% (Assembling stage) 26.58% and 40% (Hatchery Market), 28.76% and 50% (Tribal Market area) 48.14% and 120% (Chinese restaurant and Star hotel) respectively. Most Bangladeshis are still unfamiliar with the nutritional benefit and flavor of fresh Mollusc. As such promotional programs may be taken to increase awareness among the community people

Hilsa (Hilsa ilisha) caught by gill net were immediately killed by cranial spiking. Three fish we... more Hilsa (Hilsa ilisha) caught by gill net were immediately killed by cranial spiking. Three fish were kept in ice (0°C) and three other at room temperature (33°C) to follow development of rigor mortis and changes in muscle pH. The rest were frozen stored at -20°C. Rigor started 15 minutes after death in all fish and reached full rigor (100%) state in 2 and 4 hours respectively in fish kept at 33° and 0°C. The fish at 33°C deteriorated 16 hours after while in full rigor but those at 0°C lasted 26 hours of death without deterioration. Freshly caught hilsa had a muscle pH around 7 which decreased with time rapidly at 33°C and slowly at 0°C. The relative proportion of protein fraction in white and dark muscle of fish stored at 0°C and -20°C were also studied. The proportion of dark muscle was 30.34% of the white muscle. White muscle in fish at 0°C was found to contain 32.0% sarcoplasmic, 57.6% myofibrilla, 9.4% alkali-soluble and 1.1% stroma protein whereas these proteins in dark muscle w...

The study was conducted to investigate the efficacy of chlorine and UV irradiation in disinfectin... more The study was conducted to investigate the efficacy of chlorine and UV irradiation in disinfecting aquarium effluent. A non-agglutinating, avirulent strain of Aeromonas salmonicida (NCIMB 11 02) was used as the test organism. Effluents from a fish tank were inoculated with a suspension of test organisms and subsequently treated with different concentrations of hypochlorite and UV im:tdiation separately and simultaneously. When used alone, 1.0 ppm hypochlorite reduced the viable cell count from 6.5 log to 3.0 log within 20 minutes of contact period. On the otherhand, when used in combination with UV irradiation only 0.5 ppm hypochlorite exerted the same bactericidal effect within the same contact period as was observed with 1.0 ppm hypochlorite alone. This result indicated that required dose of disinfectant for the disinfection of aquarium effluents can be considerably reduced when it is used in combination with UV irradiation.

Bangladesh Journal of Fisheries

Quantification of antibiotics applied in aquaculture in Mymensingh district

Progressive Agriculture, 2014

The relationship between the activity of neurosecretory cells and gonad development of Perna cana... more The relationship between the activity of neurosecretory cells and gonad development of Perna canaliculus was investigated. The variation in staining intensity of the neurosecretory cells in different ganglia was evaluated. Changes in staining intensity of neurosecretory cells (NSC) were correlated with gonad development. The variation in colour intensity (CI) resulted from differences in the amount of secretory materials within the NSCs. The neurosecretory cell types A and B showed a similar pattern of staining intensity, and showed correlation with gametogenesis and spawning. At the beginning of gonad development, these cells possessed very few granules and the number of granules in the cells increased with gonad maturation. The staining intensity decreased in A and B- cells just after spawning. Cell types C and D did not show any substantial changes in colour intensity with gonad changes.DOI: http://dx.doi.org/10.3329/pa.v18i2.18169 Progress. Agric. 18(2): 135 - 148, 2007

Fundamental and Applied Agriculture, 2021

Progressive Agriculture, 2014

Pangas farming is one of the fastest growing types of aquaculture in Bangladesh. A study was cond... more Pangas farming is one of the fastest growing types of aquaculture in Bangladesh. A study was conducted to understand environmental issues of emerging pangas farming in Bangladesh. Data were collected through questionnaire interview and focus group discussion (FGD) with pangas farmers. All together 40 farmers were interviewed and 6 FGD sessions were conducted in Muktagacha, Trishal and Valuka Upazila of Mymensingh district. Positive and negative aspects of environmental integrity were compared. Potential environmental impacts of pangas farming were assessed using certain parameters like land use pattern, water quality management and eutrophication, pond waste management, use of chemicals and antibiotics, and escape of fish. It was found that conversion of agricultural land and beels into pangas pond were remarkable which leads to the quick loss of agricultural land that reduces rice production. The unutilized feed portion accumulated in pangas ponds produced huge pond bottom waste an...

Progressive Agriculture, 2014

An experiment was carried out in order to investigate the health status of Nandus nandus based on... more An experiment was carried out in order to investigate the health status of Nandus nandus based on clinical and histopathological observation collected from three fish markets of Mymensingh district. The study was conducted for a period of six months from October 2005 to March 2006. Clinically, it was evident that fishes were more affected having scale loss and deep dermal ulceration in the months of December and January, which were observed in Sankipara Railway Crossing and Gollpukurpar markets. But fish appeared almost normal during October to November and February to March collected from the three fish markets. Histopathologically, marked necrosis, pyknosis, haemorrhage, vacuoles and fungal granuloma were observed in skin, muscle and kidney. Gills had monogenetic trematode, hypertrophy and melanomacrophages in December and January. Liver of examined fishes had less pathological signs compared to other organs. However, Nandus nandus was found more affected in Gollpukurpar and Sanki...

Bangladesh Journal of Fisheries

The present study was conducted to know the status of biosecurity from some commercial fish hatch... more The present study was conducted to know the status of biosecurity from some commercial fish hatcheries producing high value fish seeds including gulsha (Mystus cavasius), shing (Heteropneustes fossilis) and koi (Anabas testudineus) in Mymensingh and Jessore districts. Data was collected from 90 hatcheries of each district through questionnaire interview. Biosecurity status of hatcheries was evaluated through some previously set criteria including infrastructure, restriction on entry of visitors, use of foot bath, protective clothing, hatchery hygiene, disinfection and sanitation, record keeping, hatchery personnel’s academic qualification and training. Severe lacking on some biosecurity measures were observed such as use of foot bath, restriction on visitors, record keeping system, pest control management, proper disinfection of equipment, and feed inspection. No hatchery owners were found to use any protective clothing and vaccination. Some biosecurity measures were found quite s...

Journal of Bangladesh Agricultural University, 2021

The present study focused on the use of extra-label drugs in commercial aquaculture. Data was col... more The present study focused on the use of extra-label drugs in commercial aquaculture. Data was collected through questionnaire interview with 30 drug retailers and 30 commercial aqua farmers in Mymensingh Sadar and Trishal upazila of Mymensingh district. All together 94 extra-label drugs of different groups were identified which included antibiotics, disinfectants, nutritional supplements, probiotics, gas remover and saline. Six groups of antibiotics having 10 different active compounds with 46 trade names were found in the drug retailer shops. These drugs were primarily prepared either for the use in veterinary or poultry but were found using indiscriminately in aquaculture. All these drugs were marketed by 18 companies in the study areas. It was observed that 83% drugs were not labeled for aquaculture purpose. Majority (77%) of the commercial aqua farmers used extra-label drugs in their farms and 73% of them never received any prescription from qualified personnel before use. Most of the farmers were unable to calculate appropriate doses and had no idea about risk, safety issue and toxicity reaction of using extra-label drugs. Farmers generally got suggestion from the drug retailer regarding application of drugs. The results also revealed that extra-label use of veterinary and poultry drugs in aquaculture is a common practice by commercial aqua farmers. Thus, the use of drugs in aquaculture should have a sufficient regulatory system in place. It is important to produce and use appropriate labeled drugs under a sufficient regulatory system for safe fish production in the aquaculture of Bangladesh.

Studies were conducted to examine the efficacy of selected chemotherapeutic and medicinal plants ... more Studies were conducted to examine the efficacy of selected chemotherapeutic and medicinal plants against common fungal fish pathogens. Four different doses of available fungicidal agents viz., lime + salt, brilliant green, malachite green and methylene blue were applied to the fresh culture of newly isolated fish pathogenic fungi (Aphanomyces invadans, Saprolegnia sp. and Achlya sp.) under in-vitro condition and minimum inhibitory dose (MID) was determined. Based on in-vitro results, chemotherapeutic were applied to the experimental infection of fish (Barbonymus gonionotus). Salt + lime, brilliant green and malachite green offered better results in reducing the rate of infection followed by medium effective methylene blue. Medicinal plants were selected on the basis of previous studies. Crude extracts were prepared from various parts (leaves and bulb) of neem (Azadirachta indica), turmeric (Curcuma longa) and shoti (C. zedoaria) and four different doses were applied to the fresh cul...

International Journal of Fisheries and Aquatic Studies, Jul 1, 2016

Bacterial samples had been isolated from clinically detected diseased juvenile Pangasius, collect... more Bacterial samples had been isolated from clinically detected diseased juvenile Pangasius, collected from Mymensingh, Bangladesh. Primarily, the isolates were found as Gram-negative, motile, oxidase-positive, fermentative, and O/129 resistant Aeromonas bacteria. The species was exposed as Aeromonas hydrophila from esculin hydrolysis test. Ten isolates of A. hydrophila were identified from eye lesions, kidney, and liver of the infected fishes. Further characterization of A. hydrophila was accomplished using API-20E and antibiotic sensitivity test. Isolates were highly resistant to amoxyclav among ten different antibiotics. All isolates were found as immensely pathogenic to healthy fishes while intraperitoneal injection. Histopathologically, necrotic hematopoietic tissues with pyknotic nuclei, mild hemorrhage, and wide vacuolation in kidney, liver, and muscle were principally noticed due to Aeromonad infection. So far, this is the first full note on characterizing A. hydrophila from diseased farmed Pangasius in Bangladesh. The present findings will provide further direction to develop theranostic strategies of A. hydrophila infection.

Pakistan Journal of Biological Sciences, Jan 15, 2002

SAARC Journal of Agriculture, Jul 11, 2021

Immunostimulants have been used as a prospective substance against several disease events in aqua... more Immunostimulants have been used as a prospective substance against several disease events in aquaculture, although subsequent impact is not clearly explored yet. The present study was conducted to investigate the use of immunostimulants for fish health management in Mymensingh district of Bangladesh. Questionnaire survey was performed with a total of 40 fish farmers and 20 chemical and drug retailers. Altogether, 41 immunostimulants under 7 different categories including glucans and polysaccharides, vitamins, minerals, vitamin-mineral premixes, enzymes, nucleic acids and plant extracts were reported. ACI, Eon, Acme, Square, Renata and SK+F were noticed as the prominent sources among 24 listed companies in this study. The most frequently used immunostimulants were recorded as Megavit-aqua (88.75%), Multivitamin (87.5%), Aqua-boost (87.25%), Eskalina (83.25%) and Eon fish grower (82.5%). Farmers in this study mentioned about improved health condition with lower average disease incidence (29.3%) and reduced mortality (65.35%) in fish after application of immunostimulant. The findings of this study will be useful to perform further research regarding the efficacy and impacts of a wide range of immunostimulants used in aquaculture of Bangladesh.

Journal of the Bangladesh Agricultural University, 2017

Tilapia (Oreochromis niloticus) and pangasius (Pangasianodon hypophthalmus) are currently very im... more Tilapia (Oreochromis niloticus) and pangasius (Pangasianodon hypophthalmus) are currently very important and popular species for aquaculture inBangladesh. They are cultured commercially in high stocking densities which are accompanied by several risk factors leading to disease outbreaks. The present study was carried out to investigate diseases of these two species under farming condition with special emphasis on risk factors analysis and their health management strategies. Data were collected through questionnaire interview and focus group discussion with farmers. Altogether 50 farmers were interviewed of which 25 were tilapia farmers and 25 were pangus farmers in Trishal upazila of Mymensingh district. Possible risks were assessed using certain parameters like season of disease occurrence, presence of predators in farms, contact with livestock, maintenance of farm hygiene, sharing of farming tools, feeding of fish and pond management measures. It was found that presence of predato...

bfrf.org

A study has been carried out to evaluate the marketing of marine mollusc in Bangladesh coast duri... more A study has been carried out to evaluate the marketing of marine mollusc in Bangladesh coast during April-December, 2005. Different Participatory Rural Appraisal (PRA) tools, namelyquestionnaire interview, Focus Group Discussion (FGD), market visit and case studies have been employed in the coastal areas of Cox's Bazar, Chittagong, Khulna, Satkhira and Bagherhat. This study identified a range of mollusc species exploited at the Bangladesh coast and investigated their utilizations for edible and non edible purposes. Mollusc species of commercial importance identified are clam, green mussel, oyster, cockle, karotal, laza, kostura, kata shamuk and kori. The mollusc shells collected in the coastal areas are used in many different purposes, like, making poultry and fish feed, lime production, ornamental usage, paint making etc. People from Rakhaing and some other tribes of the coast traditionally have long been harvesting green mussel, clam and oyster for their household consumption. In addition, mollusc meat is used in the coastal shrimp and prawn hatcheries as feed for mother shrimp/prawn. Mollusc harvesters are mainly the coastal poor community and they harvest by hand and nets from coastal channels and muddy soil. Small but long established market chains have been found in Moheshkhali, Chaufaldandi, Ramu, Borobazar and Burmese Market Para in Cox's Bazar, Patia in Chittagonj, Sarnkhola and Morelgonj in Bagerhat, Paikgachha, Chandkhali and Koira in Khulna, and Munshigonj, Shyamnagar and Kaligonj in Satkhira district. The main harvest season for mollusc is winter and early summer (November-March). The main profession of many of the Rakhaing households in Cox's Bazar and Rajbangshi of Satkhira is mollusc collection. It was found that the bulk of natural harvest of mollusc shell go to the fish and poultry feed industries, the second important market is lime preparation industry followed by ornamental and decorative usages. The shells are also found to be used for making paint. The people in Rakhaing use meat for their daily consumption as well as sell to the community. The main dishes prepared from mollusc meat are chartni, curry, bhuna, light fry and chop. The quality of meat remain acceptable to the consumers for 2 days without any freezing and preservation then started to deteriorate and could be detected by bad smell. The price fluctuates based on the supply, demand and harvesting season. The stakeholders in the mollusc market chain identified are mollusc harvesters/collectors, wholesalers, retailers and consumers. No well organized market structure and practices were found for marine mollusc. The study identified the different distribution channels and value addition in each of the channels. The shell goes distance places by truck and boat. Variations were found in the distribution channels and prices in the study areas. Based on the interview, FGD and market visit with different stakeholders involved in mollusc industry, the total usage is estimated to be 1,130 MT per year. The study reveals that the market margin and value addition of mollusc muscle at different stages of marketing chain are 38.57% and 100% (Harvesting stage), 326.49% and 534.86% (Assembling stage) 26.58% and 40% (Hatchery Market), 28.76% and 50% (Tribal Market area) 48.14% and 120% (Chinese restaurant and Star hotel) respectively. Most Bangladeshis are still unfamiliar with the nutritional benefit and flavor of fresh Mollusc. As such promotional programs may be taken to increase awareness among the community people

Hilsa (Hilsa ilisha) caught by gill net were immediately killed by cranial spiking. Three fish we... more Hilsa (Hilsa ilisha) caught by gill net were immediately killed by cranial spiking. Three fish were kept in ice (0°C) and three other at room temperature (33°C) to follow development of rigor mortis and changes in muscle pH. The rest were frozen stored at -20°C. Rigor started 15 minutes after death in all fish and reached full rigor (100%) state in 2 and 4 hours respectively in fish kept at 33° and 0°C. The fish at 33°C deteriorated 16 hours after while in full rigor but those at 0°C lasted 26 hours of death without deterioration. Freshly caught hilsa had a muscle pH around 7 which decreased with time rapidly at 33°C and slowly at 0°C. The relative proportion of protein fraction in white and dark muscle of fish stored at 0°C and -20°C were also studied. The proportion of dark muscle was 30.34% of the white muscle. White muscle in fish at 0°C was found to contain 32.0% sarcoplasmic, 57.6% myofibrilla, 9.4% alkali-soluble and 1.1% stroma protein whereas these proteins in dark muscle w...

The study was conducted to investigate the efficacy of chlorine and UV irradiation in disinfectin... more The study was conducted to investigate the efficacy of chlorine and UV irradiation in disinfecting aquarium effluent. A non-agglutinating, avirulent strain of Aeromonas salmonicida (NCIMB 11 02) was used as the test organism. Effluents from a fish tank were inoculated with a suspension of test organisms and subsequently treated with different concentrations of hypochlorite and UV im:tdiation separately and simultaneously. When used alone, 1.0 ppm hypochlorite reduced the viable cell count from 6.5 log to 3.0 log within 20 minutes of contact period. On the otherhand, when used in combination with UV irradiation only 0.5 ppm hypochlorite exerted the same bactericidal effect within the same contact period as was observed with 1.0 ppm hypochlorite alone. This result indicated that required dose of disinfectant for the disinfection of aquarium effluents can be considerably reduced when it is used in combination with UV irradiation.

Bangladesh Journal of Fisheries

Quantification of antibiotics applied in aquaculture in Mymensingh district

Progressive Agriculture, 2014

The relationship between the activity of neurosecretory cells and gonad development of Perna cana... more The relationship between the activity of neurosecretory cells and gonad development of Perna canaliculus was investigated. The variation in staining intensity of the neurosecretory cells in different ganglia was evaluated. Changes in staining intensity of neurosecretory cells (NSC) were correlated with gonad development. The variation in colour intensity (CI) resulted from differences in the amount of secretory materials within the NSCs. The neurosecretory cell types A and B showed a similar pattern of staining intensity, and showed correlation with gametogenesis and spawning. At the beginning of gonad development, these cells possessed very few granules and the number of granules in the cells increased with gonad maturation. The staining intensity decreased in A and B- cells just after spawning. Cell types C and D did not show any substantial changes in colour intensity with gonad changes.DOI: http://dx.doi.org/10.3329/pa.v18i2.18169 Progress. Agric. 18(2): 135 - 148, 2007

Fundamental and Applied Agriculture, 2021

Progressive Agriculture, 2014

Pangas farming is one of the fastest growing types of aquaculture in Bangladesh. A study was cond... more Pangas farming is one of the fastest growing types of aquaculture in Bangladesh. A study was conducted to understand environmental issues of emerging pangas farming in Bangladesh. Data were collected through questionnaire interview and focus group discussion (FGD) with pangas farmers. All together 40 farmers were interviewed and 6 FGD sessions were conducted in Muktagacha, Trishal and Valuka Upazila of Mymensingh district. Positive and negative aspects of environmental integrity were compared. Potential environmental impacts of pangas farming were assessed using certain parameters like land use pattern, water quality management and eutrophication, pond waste management, use of chemicals and antibiotics, and escape of fish. It was found that conversion of agricultural land and beels into pangas pond were remarkable which leads to the quick loss of agricultural land that reduces rice production. The unutilized feed portion accumulated in pangas ponds produced huge pond bottom waste an...

Progressive Agriculture, 2014

An experiment was carried out in order to investigate the health status of Nandus nandus based on... more An experiment was carried out in order to investigate the health status of Nandus nandus based on clinical and histopathological observation collected from three fish markets of Mymensingh district. The study was conducted for a period of six months from October 2005 to March 2006. Clinically, it was evident that fishes were more affected having scale loss and deep dermal ulceration in the months of December and January, which were observed in Sankipara Railway Crossing and Gollpukurpar markets. But fish appeared almost normal during October to November and February to March collected from the three fish markets. Histopathologically, marked necrosis, pyknosis, haemorrhage, vacuoles and fungal granuloma were observed in skin, muscle and kidney. Gills had monogenetic trematode, hypertrophy and melanomacrophages in December and January. Liver of examined fishes had less pathological signs compared to other organs. However, Nandus nandus was found more affected in Gollpukurpar and Sanki...

Bangladesh Journal of Fisheries

The present study was conducted to know the status of biosecurity from some commercial fish hatch... more The present study was conducted to know the status of biosecurity from some commercial fish hatcheries producing high value fish seeds including gulsha (Mystus cavasius), shing (Heteropneustes fossilis) and koi (Anabas testudineus) in Mymensingh and Jessore districts. Data was collected from 90 hatcheries of each district through questionnaire interview. Biosecurity status of hatcheries was evaluated through some previously set criteria including infrastructure, restriction on entry of visitors, use of foot bath, protective clothing, hatchery hygiene, disinfection and sanitation, record keeping, hatchery personnel’s academic qualification and training. Severe lacking on some biosecurity measures were observed such as use of foot bath, restriction on visitors, record keeping system, pest control management, proper disinfection of equipment, and feed inspection. No hatchery owners were found to use any protective clothing and vaccination. Some biosecurity measures were found quite s...

Journal of Bangladesh Agricultural University, 2021

The present study focused on the use of extra-label drugs in commercial aquaculture. Data was col... more The present study focused on the use of extra-label drugs in commercial aquaculture. Data was collected through questionnaire interview with 30 drug retailers and 30 commercial aqua farmers in Mymensingh Sadar and Trishal upazila of Mymensingh district. All together 94 extra-label drugs of different groups were identified which included antibiotics, disinfectants, nutritional supplements, probiotics, gas remover and saline. Six groups of antibiotics having 10 different active compounds with 46 trade names were found in the drug retailer shops. These drugs were primarily prepared either for the use in veterinary or poultry but were found using indiscriminately in aquaculture. All these drugs were marketed by 18 companies in the study areas. It was observed that 83% drugs were not labeled for aquaculture purpose. Majority (77%) of the commercial aqua farmers used extra-label drugs in their farms and 73% of them never received any prescription from qualified personnel before use. Most of the farmers were unable to calculate appropriate doses and had no idea about risk, safety issue and toxicity reaction of using extra-label drugs. Farmers generally got suggestion from the drug retailer regarding application of drugs. The results also revealed that extra-label use of veterinary and poultry drugs in aquaculture is a common practice by commercial aqua farmers. Thus, the use of drugs in aquaculture should have a sufficient regulatory system in place. It is important to produce and use appropriate labeled drugs under a sufficient regulatory system for safe fish production in the aquaculture of Bangladesh.

Studies were conducted to examine the efficacy of selected chemotherapeutic and medicinal plants ... more Studies were conducted to examine the efficacy of selected chemotherapeutic and medicinal plants against common fungal fish pathogens. Four different doses of available fungicidal agents viz., lime + salt, brilliant green, malachite green and methylene blue were applied to the fresh culture of newly isolated fish pathogenic fungi (Aphanomyces invadans, Saprolegnia sp. and Achlya sp.) under in-vitro condition and minimum inhibitory dose (MID) was determined. Based on in-vitro results, chemotherapeutic were applied to the experimental infection of fish (Barbonymus gonionotus). Salt + lime, brilliant green and malachite green offered better results in reducing the rate of infection followed by medium effective methylene blue. Medicinal plants were selected on the basis of previous studies. Crude extracts were prepared from various parts (leaves and bulb) of neem (Azadirachta indica), turmeric (Curcuma longa) and shoti (C. zedoaria) and four different doses were applied to the fresh cul...