Skip to main content

Tanwi Dey

Sylhet Agricultural University, Aquaculture, Faculty Member

Ghent University, Department Animal Production, Lab Aquaculture & ARtemia Reference Center, Masters student

Followers

38

Following

28

Co-authors

7

Public Views

Phone: 01
Address: Department of Aquaculture
Sylhet Agricultural University, Sylhet 3100, Bangladesh

less

Rajshahi University

Shahjalal University of Science and Technology

Iftekhar Ahmed Fagun

Sylhet Agricultural University

Md Saifullah Bin Aziz

University of Rajshahi, Bangladesh

Bangladesh Agricultural University

md tariqul alam

The Australian National University

Hajee Mohammad Danesh Science & Technolgy University, Bangladesh

InterestsView All (8)

Uploads

Papers by Tanwi Dey

Assessment of the livelihood status of the fish farmers in some selected areas of Bagmara upazilla under Rajshahi district

Journal of the Bangladesh Agricultural University, 1970

The present investigation was carried out to assess the livelihood status of the fish farmers in ... more The present investigation was carried out to assess the livelihood status of the fish farmers in Hamirkutsha and Kamarbari Unions of Bagmara upazilla under Rajshahi district during June to December 2006. Data were collected through the use of well structured questionnaire. Fifty farmers were included in this study who were directly involved in fish farming. Average pond size was 0.13 ha with single (64%) and multiple ownerships (36%). Most of the fishers were belonged to the age category of 31 to 40 years and average education level of 9.86 years of schooling, represented by 94% Muslims and 6% Hindus. About 54% of the farmers have tinshed house while 26, 14 and 6% of the farmers have half-building, building and kacha house, respectively. Average annual incomes of majority of fish farmers were above Tk. 75,000 per annum and 62% of the farmers used semi-pucca sanitary, 28% used pucca sanitary while only 10% used katcha sanitary. About 62% of the farmers had electricity facilities whil...

Dietary inosine monophosphate improved growth, feed utilization, blood biochemical characteristics, and intestinal histo-morphology of slow growing golden mahseer (Tor putitora)

Animal Feed Science and Technology

Fish Marketing System and Socio Economic Status of Aratdars in Natore and Rajshahi, Bangladesh

Our Nature, 2013

An investigation was carried out during the period from December 2007 to November 2008 to find ou... more An investigation was carried out during the period from December 2007 to November 2008 to find out the fish marketing system and socio economic status of aratdars at Singra (Natore), Baneshwar and Puthia (Rajshahi). Four types of fishes were observed where maximum fishes (70%) were come from the local area and rest (30%) was come from outside of Bangladesh. Four types of marketing channel were identified and the commission agents usually earn about 3-4% commissions from the farmers. The highest landing was 388143.75 kg/yr (Hypophthalmichthys molitrix in Shingra) whereas the lowest landing was 701.75 kg/yr (Xenentodon cancila in Baneshwar). Price varied from 20.38±4.58 (Chanda ranga in Baneshwar) to 190.17±27.33 Tk/kg (Clarias batrachus in Baneshwar). The average marketing cost and marketing margin varied from 91 to 128 Tk/day and 17.75 to 28.25 Tk/kg in Baneshwar. Majority (53.76% in Puthia to 74.99% in Baneshwar) aratdars were found to class I-X. Major secondary occupation of the ...

Review on n-3 HUFA and Live Food Organism for Marine Fish Larvae Nutrition

American Journal of Agricultural Science, Engineering, and Technology

Marine fish farm industries face ongoing challenges due to a lack of quality seed, a low survival... more Marine fish farm industries face ongoing challenges due to a lack of quality seed, a low survival rate and a slow growth rate of marine fish larvae. One of the most sensitive problems is a nutritionally balanced quality feed for rearing these larval fish at the first feeding stage. Many studies have reported high requirements of n-3 highly unsaturated fatty acids, mainly eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) for proper development, which have also been reported to increase the survival and growth status of larval fish. Marine fish larvae have difficulties accepting artificial feed at their weaning stage, so live food plays a vital role in the rearing process. Artemia is one of the most commonly used live food organisms in marine fish larvae production systems. However, they are deficient in EPA and DHA, which are most critical for larval development. Recent advancements in live food production systems have developed several techniques of bio-encapsulation and en...

Gender participation and socio-economic evaluation of on-farm and cottage fish feed industries in Mymensingh district

International Journal of Fisheries and Aquatic Studies, 2022

On-farm and cottage fish feed industries of three upazilas-Mymensingh Sadar, Trishal and Muktagac... more On-farm and cottage fish feed industries of three upazilas-Mymensingh Sadar, Trishal and Muktagacha in Mymensingh district were investigated to understand gender participation ratio, and to evaluate their socioeconomic status and working environment. A total of 150 respondents were randomly interviewed where 60% of feed mill owners and workers were middle aged group. Relatively high average wage (9000-10,000 tk/month) found in Mymensingh sadar. However, others factors such as family size, income, socioeconomic status etc. found similar among three studied areas. Among the surveyed fish feed industries, 53.33% industries produced feed for their own fish farm and 10% produced feed commercially. Locally available ingredients were used to prepare feed without scientific knowledge. Hundred percent workers claimed unhealthy working environment. A lower number of women participation observed in fish feed industries of studied areas. Therefore, government and non-govt. interference is necessary to encourage and motivate more women participation in aquaculture industries for sustainable economic development.

Some Reproductive Aspects of Freshwater Garfish, Xenentodon cancila (Hamilton, 1822) from North-East Bangladesh

Journal of Fisheries and Aquatic Science, 2017

Length-weight relationships and condition factor of the Japanese silver-biddy, Gerres equulus , in the Yatsushiro Sea, western Kyushu, Japan

Journal of Applied Ichthyology, 2009

Hainan Island is the largest island in southern China (Myers et al., 2000). It is a biodiversity ... more Hainan Island is the largest island in southern China (Myers et al., 2000). It is a biodiversity hotspot with tropical monsoon climate (Sodhi et al., 2004). Rivers only account for 12% by surface area of Hainan wetlands. However, most freshwater fishes (137 species) are reported to inhabit riverine habitats (Xiong et al., 2018). Puntius semifasciolatus (Günther, 1868), Acrossocheilus iridescens (Nichols and Pope, 1927), Plesiomyzon baotingensis (Zheng and Chen, 1980), Hemibagrus hainanensis (Tchang, 1935) and Glyptothorax hainanensis (Nichols and Pope, 1927) are ecologically critical native fishes of Hainan Island. However, Studies on these 5 fish species have still limited to morphological classification and distribution records, there is a lack of research on its basic biology currently 1. At present, anthropogenic activities including overexploitation of fish resources, water pollution, engineering construction and invasion of alien species have continued to threaten ecological functions these wetlands (Skelton et al., 1995; Xiong et al., 2018). Therefore, it is urgent to carry out researches on the basic biology of native fishes in Hainan Island and accumulate relevant data.

Gender participation and socio-economic evaluation of on-farm and cottage fish feed industries in Mymensingh district

by Tanwi Dey and Piash Ghosh

International Journal of Fisheries and Aquatic Studies, 2019

On-farm and cottage fish feed industries of three upazilas-Mymensingh Sadar, Trishal and Muktagac... more On-farm and cottage fish feed industries of three upazilas-Mymensingh Sadar, Trishal and Muktagacha in Mymensingh district were investigated to understand gender participation ratio, and to evaluate their socioeconomic status and working environment. A total of 150 respondents were randomly interviewed where 60% of feed mill owners and workers were middle aged group. Relatively high average wage (9000-10,000 tk/month) found in Mymensingh sadar. However, others factors such as family size, income, socioeconomic status etc. found similar among three studied areas. Among the surveyed fish feed industries, 53.33% industries produced feed for their own fish farm and 10% produced feed commercially. Locally available ingredients were used to prepare feed without scientific knowledge. Hundred percent workers claimed unhealthy working environment. A lower number of women participation observed in fish feed industries of studied areas. Therefore, government and non-govt. interference is necessary to encourage and motivate more women participation in aquaculture industries for sustainable economic development.

Present status of oxbow lake fisheries: Cases from south-western Bangladesh

International Journal of Fisheries and Aquatic Studies, 2019

Oxbow lakes are semi-closed water bodies (locally called Baor) occupied by dead channels of river... more Oxbow lakes are semi-closed water bodies (locally called Baor) occupied by dead channels of rivers. To evaluate the existing status of Baor fisheries two Baors (Baluhor and Nasti Baor) of different management practices in south-western Bangladesh was selected. Both primary and secondary data were collected from March to December 2018. Management of Baluhor and Nasti Baor were enforced by the Department of Fisheries (DoF) and fishers’ community themselves (CBFM) respectively. Fishers’ involvement with fishing activities had restricted access to both study Baor areas. The commonly cultured species were Labeo rohita, Catla catla, Hypophthalmichthys molitrix, Ctenopharyngodon idella, Cirrhinus cirrhosus, Mylopharyngodon piceus, and Cyprinus carpio, locally called “Raja Mach”. Various non-stocked fishes were also found in both Baors that reproduced naturally, locally called “Rani Mach”. In Nasti Baor, fish was harvested (Both Raja and Rani Mach) three to four times a year while it was tw...

Species availability and business trend of ornamental fish in sylhet division

This study investigated the marketing channels and present status of aquarium fish trade in diffe... more This study investigated the marketing channels and present status of aquarium fish trade in different districts of Sylhet division in Bangladesh over the period of six months from 5 December 2017 to 4 June 2018. Two upazilas from each district were considered for data collection. Data were collected by questionnaire interview method. Among four districts, the highest number of aquarium shops was recorded in Sylhet district. Aquarium fish shops not found in Sunamganj district. Eleven (11) number of aquarium shops were found in Sylhet division, where 26 aquarium fish species were accounted. Amongst, 25 were exotic ornamental fish species and an indigenous species (Rosy barb) has been observed. The fishes from order Cypriniformes were dominant in market. In the present study, Discus was the most expensive species (1300-1500 BDT/Pair) followed by Parrot (450-700BDT/Pair), Oscar (280-450BDT/Pair), Butterfly (250350 BDT/Pair). Most of the other species were sold usually below 100 BDT/Pair...

APPARENT DIGESTIBILITY COEFFICIENT OF HIGH FISHMEAL REPLACED PRACTICAL DIETS FOR CLIMBING PERCH (Anabas testudineus)

Apparent digestibility co-efficient (ADC) of high fishmeal replaced practical diets for climbing ... more Apparent digestibility co-efficient (ADC) of high fishmeal replaced practical diets for climbing perch (Anabus testudineus) was determined by gradual replacement level of dietary fish meal with equal ratio of meat and bone meal (MBM) and protein concentrate (PC). Four iso-nitrogenous diets (40% crude protein) were formulated by replacing 0 (T 1 ), 70 (T 2 ), 85 (T 3 ) and 100% (T 4 ) fish meal with a mixture of MBM and PC (1:1). Chromic oxide (0.5%) was used as a marker to the feed formulation. Ten fish (25 ± 1.31 g) were transferred into 12 indoor glass aquarium (0.243 m 3 each) to fed with experimental diets twice daily as triplicate group. Feaces were collected through siphoning process. ADC of protein, lipid and dry matter was significantly higher (P<0.05) in T 1 which were, 87.54±1.59, 85.42±1.05 and 69.62± 1.81, respectively. Similarly, no significant difference of apparent digestibility for dry matter found between T 2 and T 3 ; T 3 and T 4 . For protein digestibility, similar result had showed between T 1 and T 2 ; T 2 and T 3. Lipid digestibility was not significantly different in fish fed diet, replaced up to 70% fishmeal protein with MBM and PC. No significant difference of lipid digestibility was also found in T 3 (73.09±1.45) and T 4 (74.38±1.25). Considering the fishmeal availability, farmers economic and practical field condition it could be concluded from the present study that 70 to 85% FM protein could be replaced with MBM and PC (1:1) in diet of climbing perch A. testudineus.

Status of ornamental fishes along with health issues in sylhet division of Bangladesh

International Journal of Fisheries and Aquatic Studies, 2019

The study was conducted to assess the status of ornamental fishes along with health issues in Syl... more The study was conducted to assess the status of ornamental fishes along with health issues in Sylhet division for a period of six months from 5 December 2017 to 4 June 2018. Data were collected from eight upazilas under four districts in Sylhet division through questionnaire interview with aquarium shop keepers and users. In total 11 aquarium shops were found in greater Sylhet. Only 26 ornamental fish species were available at different shops and all species belonged to 4 ordersCypriniformes (42.31%), Perciformes (38.46%), Siluriformes (15.38%) and Characiformes (3.85%). All species were exotic except one which was native and these were brought from Dhaka Katabon, Chittagonj and Feni. Exotic fishes were introduced to mentioned places from Thailand, China, India and Malaysia by importer mainly three sizes such as small (1 to 1.5 inch), medium (2-5 inch) and large (8 to 12 inch), respectively. Ornamental fishes fed on supplementary feed imported from Thailand, China and Singapore. Mar...

Effects of dietary probiotics on the growth, blood chemistry and stress response of Pabda catfish (Ompok pabda) juveniles

Aacl Bioflux, 2020

The current study was conducted to evaluate the effects of dietary commercial probiotics on the g... more The current study was conducted to evaluate the effects of dietary commercial probiotics on the growth, blood chemistry and stress response of Ompok pabda juveniles. Eighteen homogenous sized juveniles with a mean weight of 1.31±0.04 g were randomly distributed in glass aquariums and assigned 4 treatments with 3 replicates. Fish were fed experimental diets containing commercial probiotics at a level of 0%, 0.2%, 0.4% and 0.8% for treatment groups T1, T2, T3 and T4, respectively, for 90 days. At the end of trial, 10 fish from each replicate were randomly selected for blood collection through caudal puncture with heparinized syringes. Afterwards, the stress tolerance test was conducted to determine the lethal time of 50% mortality (LT50) in saline water (35 ppt), which was conducted by counting dead fish every 5 minutes after first exposure. Fish in treatment groups T2 and T3 showed significantly lower plasma glucose levels compared to treatment group T1. T4 group had an intermediate ...

Effects of dietary multi-strain probiotic supplementation on growth, body composition and stress resistance of the Gangetic catfish, Mystus cavasius fry

Journal of Bangladesh Agricultural University, 2019

The present study was designed to evaluate the effects of dietary probiotics on growth, feed ut... more The present study was designed to evaluate the effects of dietary probiotics on growth, feed
utilization, body composition, and stress resistance of the Gangetic catfish, Mystus cavasius fry. A
commercially formulated feed for catfish (ACI Company Ltd.) was used as a basal diet. Three different
levels (0.2, 0.4, and 0.8%) of commercial multi-strain probiotic NavioPlus was added to the basal diet
to formulate three experimental diets (PB 0.2, PB0.4, PB0.8) and the basal diet was considered as
control (PB0). Each diet was randomly allocated to triplicate groups of fish (mean initial weight
0.32±0.0003 g for 56 days. In general, dietary probiotics supplementations tended to improve growth
performances (final body weight, percentage (%) weight gain and specific growth rate, SGR), in which
significantly highest performances were found in diet group PB-0.2 followed by diet groups PB-0.4 and
PB-0.8. Probiotics supplementation resulting in increased feed conversion efficiency (FCE) and protein
efficiency ratio (PER) and the highest value (P<0.05) obtained in diet group PB-0.4. The control group
showed significantly lower growth and feed utilization performances. Except for lipid content, the
body proximate compositions were not significantly influenced (P > 0.05) by the dietary probiotics
supplementation. However, the fishes fed diet PB-0.2 and PB-0 had significantly higher and lower lipid
content, respectively. In terms of salinity stress resistance, M. cavasius fry fed probiotic supplemented
diet showed increased LT50 compared to the supplementation free control group. Significantly higher
LT50 observed in diet group PB-0.4 followed by PB-0.8. The quadratic regression analysis of % weight
gain, FCE and, LT50 revealed that the optimum level of dietary multi-strain probiotics supplementation
ranged between 0.45-0.54% for M. cavasius fry, which is also in-line with the most of the measured
performance parameters of fish under present experimental condition

Present status of oxbow lake fisheries Cases from south-western Bangladesh

by Dr. Sabuj Kanti Mazumder, Golam Shakil Ahamed, and Tanwi Dey

International Journal of Fisheries and Aquatic Studies, 2019

Oxbow lakes are semi-closed water bodies (locally called Baor) occupied by dead channels of river... more Oxbow lakes are semi-closed water bodies (locally called Baor) occupied by dead channels of rivers. To evaluate the existing status of Baor fisheries two Baors (Baluhor and Nasti Baor) of different management practices in south-western Bangladesh was selected. Both primary and secondary data were collected from March to December 2018. Management of Baluhor and Nasti Baor were enforced by the Department of Fisheries (DoF) and fishers’ community themselves (CBFM) respectively. Fishers’ involvement with fishing activities had restricted access to both study Baor areas. The commonly cultured species were Labeo rohita, Catla catla, Hypophthalmichthys molitrix, Ctenopharyngodon idella, Cirrhinus cirrhosus, Mylopharyngodon piceus, and Cyprinus carpio, locally called “Raja Mach”. Various non-stocked fishes were also found in both Baors that reproduced naturally, locally called “Rani Mach”. In Nasti Baor, fish was harvested (Both Raja and Rani Mach) three to four times a year while it was two times in Baluhor Baor. Furthermore, fishers had access to harvest “Rani Mach” round the year in Baluhor Baor while there was no access in Nasti Baor. Annual production rate of Raja Mach (Kg/hectare) in Baluhor and Nasti Baor was 471.45 and 1806.45 respectively while in the case of Rani Mach the production rate (Kg/hectare) was 373.04 and 327.06 respectively in Baluhor and Nasti Baor. The current study also found a range of managemental, natural, economic, and social obstructions in Baor fisheries management.

International Journal of Fisheries and Aquatic Studies 2019; 7(4): 356-360 Status of ornamental fishes along with health issues in Sylhet division of Bangladesh

by Tanwi Dey and farjana chadnee

The study was conducted to assess the status of ornamental fishes along with health issues in Syl... more

Assessment of the livelihood status of fish farmers and aquaculture conditions in Habigonj Sadar Upazila under Habigonj district, Bangladesh

The experiment was conducted to assess the livelihood status of fish farmers and aquaculture cond... more The experiment was conducted to assess the livelihood status of fish farmers and aquaculture conditions in Habigonj Sadar upazila under Habigonj district for a period of six months from January 2018 to June 2018. The study revealed that maximum number of fish farmers (56%) was remaining between age group of 41-60 years, primary educated (38%), lived in joint family (72%) and majority (47%) had 5-6 family members. It was also found that maximum fish farmers had tin shed household (69%), used semi pacca toilet and used to go upazila health complex for treatment. Maximum fish farmers (90%) cultured fish in polyculture system where most of the ponds belong to multi ownership (39%) and the majority pond size was 0.05-0.50 ha (63%). Most of the fish farmers (46%) got their annual income as BDT 50,001-1,50,000 per year. Present study also identifies some important constraints to fish culture system in the study area.

FISH MARKETING SYSTEM AND SOCIO-ECONOMIC STATUS OF

The present study was conducted to identify the existing marketing system, availability of fish s... more

Species availability and business trend of ornamental fish in Sylhet division

International Journal of Fisheries and Aquatic Studies , 2019

This study investigated the marketing channels and present status of aquarium fish trade in diffe... more This study investigated the marketing channels and present status of aquarium fish trade in different districts of Sylhet division in Bangladesh over the period of six months from 5 December 2017 to 4 June 2018. Two upazilas from each district were considered for data collection. Data were collected by questionnaire interview method. Among four districts, the highest number of aquarium shops was recorded in Sylhet district. Aquarium fish shops not found in Sunamganj district. Eleven (11) number of aquarium shops were found in Sylhet division, where 26 aquarium fish species were accounted. Amongst, 25 were exotic ornamental fish species and an indigenous species (Rosy barb) has been observed. The fishes from order Cypriniformes were dominant in market. In the present study, Discus was the most expensive species (1300-1500 BDT/Pair) followed by Parrot (450-700BDT/Pair), Oscar (280-450BDT/Pair), Butterfly (250-350 BDT/Pair). Most of the other species were sold usually below 100 BDT/Pair. All aquarium fish species were imported from the internationals markets like Singapore, Malaysia, Thailand, etc. Importer/Wholesalers and breeders sell them to retailers, shopkeepers and finally the shop keepers sell them to the aquarium owners. During this survey, it was recorded that fish selling intensity decrease during winter months especially in January and February; and that time retailers engage themselves to other subsidiary business. The aquarium fish traders of Sylhet division were categorized into three groups such as (A) Aquarium fish traders of Sylhet district (63.63%) (B) Aquarium fish traders of Moulavibazar district (27.27%) and (C) Aquarium fish traders of Habiganj district (9.09%). The economic analysis shown that the Group A represent the highest benefit cost ratio and rate of return on total cost which were 1.42 and 27.034% respectively.

Some Reproductive Aspects of Freshwater Garfish, Xenentodon cancila (Hamilton, 1822) from North-East Bangladesh

by Tanwi Dey and Sohel Mian

E W = aL b ln(W) = ln(a)+b ln(L) s b-3 t = sb K F = 100×(W/L 3 )

Assessment of the livelihood status of the fish farmers in some selected areas of Bagmara upazilla under Rajshahi district

Journal of the Bangladesh Agricultural University, 1970

The present investigation was carried out to assess the livelihood status of the fish farmers in ... more The present investigation was carried out to assess the livelihood status of the fish farmers in Hamirkutsha and Kamarbari Unions of Bagmara upazilla under Rajshahi district during June to December 2006. Data were collected through the use of well structured questionnaire. Fifty farmers were included in this study who were directly involved in fish farming. Average pond size was 0.13 ha with single (64%) and multiple ownerships (36%). Most of the fishers were belonged to the age category of 31 to 40 years and average education level of 9.86 years of schooling, represented by 94% Muslims and 6% Hindus. About 54% of the farmers have tinshed house while 26, 14 and 6% of the farmers have half-building, building and kacha house, respectively. Average annual incomes of majority of fish farmers were above Tk. 75,000 per annum and 62% of the farmers used semi-pucca sanitary, 28% used pucca sanitary while only 10% used katcha sanitary. About 62% of the farmers had electricity facilities whil...

Dietary inosine monophosphate improved growth, feed utilization, blood biochemical characteristics, and intestinal histo-morphology of slow growing golden mahseer (Tor putitora)

Animal Feed Science and Technology

Fish Marketing System and Socio Economic Status of Aratdars in Natore and Rajshahi, Bangladesh

Our Nature, 2013

An investigation was carried out during the period from December 2007 to November 2008 to find ou... more An investigation was carried out during the period from December 2007 to November 2008 to find out the fish marketing system and socio economic status of aratdars at Singra (Natore), Baneshwar and Puthia (Rajshahi). Four types of fishes were observed where maximum fishes (70%) were come from the local area and rest (30%) was come from outside of Bangladesh. Four types of marketing channel were identified and the commission agents usually earn about 3-4% commissions from the farmers. The highest landing was 388143.75 kg/yr (Hypophthalmichthys molitrix in Shingra) whereas the lowest landing was 701.75 kg/yr (Xenentodon cancila in Baneshwar). Price varied from 20.38±4.58 (Chanda ranga in Baneshwar) to 190.17±27.33 Tk/kg (Clarias batrachus in Baneshwar). The average marketing cost and marketing margin varied from 91 to 128 Tk/day and 17.75 to 28.25 Tk/kg in Baneshwar. Majority (53.76% in Puthia to 74.99% in Baneshwar) aratdars were found to class I-X. Major secondary occupation of the ...

Review on n-3 HUFA and Live Food Organism for Marine Fish Larvae Nutrition

American Journal of Agricultural Science, Engineering, and Technology

Marine fish farm industries face ongoing challenges due to a lack of quality seed, a low survival... more Marine fish farm industries face ongoing challenges due to a lack of quality seed, a low survival rate and a slow growth rate of marine fish larvae. One of the most sensitive problems is a nutritionally balanced quality feed for rearing these larval fish at the first feeding stage. Many studies have reported high requirements of n-3 highly unsaturated fatty acids, mainly eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) for proper development, which have also been reported to increase the survival and growth status of larval fish. Marine fish larvae have difficulties accepting artificial feed at their weaning stage, so live food plays a vital role in the rearing process. Artemia is one of the most commonly used live food organisms in marine fish larvae production systems. However, they are deficient in EPA and DHA, which are most critical for larval development. Recent advancements in live food production systems have developed several techniques of bio-encapsulation and en...

Gender participation and socio-economic evaluation of on-farm and cottage fish feed industries in Mymensingh district

International Journal of Fisheries and Aquatic Studies, 2022

On-farm and cottage fish feed industries of three upazilas-Mymensingh Sadar, Trishal and Muktagac... more On-farm and cottage fish feed industries of three upazilas-Mymensingh Sadar, Trishal and Muktagacha in Mymensingh district were investigated to understand gender participation ratio, and to evaluate their socioeconomic status and working environment. A total of 150 respondents were randomly interviewed where 60% of feed mill owners and workers were middle aged group. Relatively high average wage (9000-10,000 tk/month) found in Mymensingh sadar. However, others factors such as family size, income, socioeconomic status etc. found similar among three studied areas. Among the surveyed fish feed industries, 53.33% industries produced feed for their own fish farm and 10% produced feed commercially. Locally available ingredients were used to prepare feed without scientific knowledge. Hundred percent workers claimed unhealthy working environment. A lower number of women participation observed in fish feed industries of studied areas. Therefore, government and non-govt. interference is necessary to encourage and motivate more women participation in aquaculture industries for sustainable economic development.

Some Reproductive Aspects of Freshwater Garfish, Xenentodon cancila (Hamilton, 1822) from North-East Bangladesh

Journal of Fisheries and Aquatic Science, 2017

Length-weight relationships and condition factor of the Japanese silver-biddy, Gerres equulus , in the Yatsushiro Sea, western Kyushu, Japan

Journal of Applied Ichthyology, 2009

Hainan Island is the largest island in southern China (Myers et al., 2000). It is a biodiversity ... more Hainan Island is the largest island in southern China (Myers et al., 2000). It is a biodiversity hotspot with tropical monsoon climate (Sodhi et al., 2004). Rivers only account for 12% by surface area of Hainan wetlands. However, most freshwater fishes (137 species) are reported to inhabit riverine habitats (Xiong et al., 2018). Puntius semifasciolatus (Günther, 1868), Acrossocheilus iridescens (Nichols and Pope, 1927), Plesiomyzon baotingensis (Zheng and Chen, 1980), Hemibagrus hainanensis (Tchang, 1935) and Glyptothorax hainanensis (Nichols and Pope, 1927) are ecologically critical native fishes of Hainan Island. However, Studies on these 5 fish species have still limited to morphological classification and distribution records, there is a lack of research on its basic biology currently 1. At present, anthropogenic activities including overexploitation of fish resources, water pollution, engineering construction and invasion of alien species have continued to threaten ecological functions these wetlands (Skelton et al., 1995; Xiong et al., 2018). Therefore, it is urgent to carry out researches on the basic biology of native fishes in Hainan Island and accumulate relevant data.

Gender participation and socio-economic evaluation of on-farm and cottage fish feed industries in Mymensingh district

by Tanwi Dey and Piash Ghosh

International Journal of Fisheries and Aquatic Studies, 2019

On-farm and cottage fish feed industries of three upazilas-Mymensingh Sadar, Trishal and Muktagac... more On-farm and cottage fish feed industries of three upazilas-Mymensingh Sadar, Trishal and Muktagacha in Mymensingh district were investigated to understand gender participation ratio, and to evaluate their socioeconomic status and working environment. A total of 150 respondents were randomly interviewed where 60% of feed mill owners and workers were middle aged group. Relatively high average wage (9000-10,000 tk/month) found in Mymensingh sadar. However, others factors such as family size, income, socioeconomic status etc. found similar among three studied areas. Among the surveyed fish feed industries, 53.33% industries produced feed for their own fish farm and 10% produced feed commercially. Locally available ingredients were used to prepare feed without scientific knowledge. Hundred percent workers claimed unhealthy working environment. A lower number of women participation observed in fish feed industries of studied areas. Therefore, government and non-govt. interference is necessary to encourage and motivate more women participation in aquaculture industries for sustainable economic development.

Present status of oxbow lake fisheries: Cases from south-western Bangladesh

International Journal of Fisheries and Aquatic Studies, 2019

Oxbow lakes are semi-closed water bodies (locally called Baor) occupied by dead channels of river... more Oxbow lakes are semi-closed water bodies (locally called Baor) occupied by dead channels of rivers. To evaluate the existing status of Baor fisheries two Baors (Baluhor and Nasti Baor) of different management practices in south-western Bangladesh was selected. Both primary and secondary data were collected from March to December 2018. Management of Baluhor and Nasti Baor were enforced by the Department of Fisheries (DoF) and fishers’ community themselves (CBFM) respectively. Fishers’ involvement with fishing activities had restricted access to both study Baor areas. The commonly cultured species were Labeo rohita, Catla catla, Hypophthalmichthys molitrix, Ctenopharyngodon idella, Cirrhinus cirrhosus, Mylopharyngodon piceus, and Cyprinus carpio, locally called “Raja Mach”. Various non-stocked fishes were also found in both Baors that reproduced naturally, locally called “Rani Mach”. In Nasti Baor, fish was harvested (Both Raja and Rani Mach) three to four times a year while it was tw...

Species availability and business trend of ornamental fish in sylhet division

This study investigated the marketing channels and present status of aquarium fish trade in diffe... more This study investigated the marketing channels and present status of aquarium fish trade in different districts of Sylhet division in Bangladesh over the period of six months from 5 December 2017 to 4 June 2018. Two upazilas from each district were considered for data collection. Data were collected by questionnaire interview method. Among four districts, the highest number of aquarium shops was recorded in Sylhet district. Aquarium fish shops not found in Sunamganj district. Eleven (11) number of aquarium shops were found in Sylhet division, where 26 aquarium fish species were accounted. Amongst, 25 were exotic ornamental fish species and an indigenous species (Rosy barb) has been observed. The fishes from order Cypriniformes were dominant in market. In the present study, Discus was the most expensive species (1300-1500 BDT/Pair) followed by Parrot (450-700BDT/Pair), Oscar (280-450BDT/Pair), Butterfly (250350 BDT/Pair). Most of the other species were sold usually below 100 BDT/Pair...

APPARENT DIGESTIBILITY COEFFICIENT OF HIGH FISHMEAL REPLACED PRACTICAL DIETS FOR CLIMBING PERCH (Anabas testudineus)

Apparent digestibility co-efficient (ADC) of high fishmeal replaced practical diets for climbing ... more Apparent digestibility co-efficient (ADC) of high fishmeal replaced practical diets for climbing perch (Anabus testudineus) was determined by gradual replacement level of dietary fish meal with equal ratio of meat and bone meal (MBM) and protein concentrate (PC). Four iso-nitrogenous diets (40% crude protein) were formulated by replacing 0 (T 1 ), 70 (T 2 ), 85 (T 3 ) and 100% (T 4 ) fish meal with a mixture of MBM and PC (1:1). Chromic oxide (0.5%) was used as a marker to the feed formulation. Ten fish (25 ± 1.31 g) were transferred into 12 indoor glass aquarium (0.243 m 3 each) to fed with experimental diets twice daily as triplicate group. Feaces were collected through siphoning process. ADC of protein, lipid and dry matter was significantly higher (P<0.05) in T 1 which were, 87.54±1.59, 85.42±1.05 and 69.62± 1.81, respectively. Similarly, no significant difference of apparent digestibility for dry matter found between T 2 and T 3 ; T 3 and T 4 . For protein digestibility, similar result had showed between T 1 and T 2 ; T 2 and T 3. Lipid digestibility was not significantly different in fish fed diet, replaced up to 70% fishmeal protein with MBM and PC. No significant difference of lipid digestibility was also found in T 3 (73.09±1.45) and T 4 (74.38±1.25). Considering the fishmeal availability, farmers economic and practical field condition it could be concluded from the present study that 70 to 85% FM protein could be replaced with MBM and PC (1:1) in diet of climbing perch A. testudineus.

Status of ornamental fishes along with health issues in sylhet division of Bangladesh

International Journal of Fisheries and Aquatic Studies, 2019

The study was conducted to assess the status of ornamental fishes along with health issues in Syl... more The study was conducted to assess the status of ornamental fishes along with health issues in Sylhet division for a period of six months from 5 December 2017 to 4 June 2018. Data were collected from eight upazilas under four districts in Sylhet division through questionnaire interview with aquarium shop keepers and users. In total 11 aquarium shops were found in greater Sylhet. Only 26 ornamental fish species were available at different shops and all species belonged to 4 ordersCypriniformes (42.31%), Perciformes (38.46%), Siluriformes (15.38%) and Characiformes (3.85%). All species were exotic except one which was native and these were brought from Dhaka Katabon, Chittagonj and Feni. Exotic fishes were introduced to mentioned places from Thailand, China, India and Malaysia by importer mainly three sizes such as small (1 to 1.5 inch), medium (2-5 inch) and large (8 to 12 inch), respectively. Ornamental fishes fed on supplementary feed imported from Thailand, China and Singapore. Mar...

Effects of dietary probiotics on the growth, blood chemistry and stress response of Pabda catfish (Ompok pabda) juveniles

Aacl Bioflux, 2020

The current study was conducted to evaluate the effects of dietary commercial probiotics on the g... more The current study was conducted to evaluate the effects of dietary commercial probiotics on the growth, blood chemistry and stress response of Ompok pabda juveniles. Eighteen homogenous sized juveniles with a mean weight of 1.31±0.04 g were randomly distributed in glass aquariums and assigned 4 treatments with 3 replicates. Fish were fed experimental diets containing commercial probiotics at a level of 0%, 0.2%, 0.4% and 0.8% for treatment groups T1, T2, T3 and T4, respectively, for 90 days. At the end of trial, 10 fish from each replicate were randomly selected for blood collection through caudal puncture with heparinized syringes. Afterwards, the stress tolerance test was conducted to determine the lethal time of 50% mortality (LT50) in saline water (35 ppt), which was conducted by counting dead fish every 5 minutes after first exposure. Fish in treatment groups T2 and T3 showed significantly lower plasma glucose levels compared to treatment group T1. T4 group had an intermediate ...

Effects of dietary multi-strain probiotic supplementation on growth, body composition and stress resistance of the Gangetic catfish, Mystus cavasius fry

Journal of Bangladesh Agricultural University, 2019

The present study was designed to evaluate the effects of dietary probiotics on growth, feed ut... more The present study was designed to evaluate the effects of dietary probiotics on growth, feed
utilization, body composition, and stress resistance of the Gangetic catfish, Mystus cavasius fry. A
commercially formulated feed for catfish (ACI Company Ltd.) was used as a basal diet. Three different
levels (0.2, 0.4, and 0.8%) of commercial multi-strain probiotic NavioPlus was added to the basal diet
to formulate three experimental diets (PB 0.2, PB0.4, PB0.8) and the basal diet was considered as
control (PB0). Each diet was randomly allocated to triplicate groups of fish (mean initial weight
0.32±0.0003 g for 56 days. In general, dietary probiotics supplementations tended to improve growth
performances (final body weight, percentage (%) weight gain and specific growth rate, SGR), in which
significantly highest performances were found in diet group PB-0.2 followed by diet groups PB-0.4 and
PB-0.8. Probiotics supplementation resulting in increased feed conversion efficiency (FCE) and protein
efficiency ratio (PER) and the highest value (P<0.05) obtained in diet group PB-0.4. The control group
showed significantly lower growth and feed utilization performances. Except for lipid content, the
body proximate compositions were not significantly influenced (P > 0.05) by the dietary probiotics
supplementation. However, the fishes fed diet PB-0.2 and PB-0 had significantly higher and lower lipid
content, respectively. In terms of salinity stress resistance, M. cavasius fry fed probiotic supplemented
diet showed increased LT50 compared to the supplementation free control group. Significantly higher
LT50 observed in diet group PB-0.4 followed by PB-0.8. The quadratic regression analysis of % weight
gain, FCE and, LT50 revealed that the optimum level of dietary multi-strain probiotics supplementation
ranged between 0.45-0.54% for M. cavasius fry, which is also in-line with the most of the measured
performance parameters of fish under present experimental condition

Present status of oxbow lake fisheries Cases from south-western Bangladesh

by Dr. Sabuj Kanti Mazumder, Golam Shakil Ahamed, and Tanwi Dey

International Journal of Fisheries and Aquatic Studies, 2019

Oxbow lakes are semi-closed water bodies (locally called Baor) occupied by dead channels of river... more Oxbow lakes are semi-closed water bodies (locally called Baor) occupied by dead channels of rivers. To evaluate the existing status of Baor fisheries two Baors (Baluhor and Nasti Baor) of different management practices in south-western Bangladesh was selected. Both primary and secondary data were collected from March to December 2018. Management of Baluhor and Nasti Baor were enforced by the Department of Fisheries (DoF) and fishers’ community themselves (CBFM) respectively. Fishers’ involvement with fishing activities had restricted access to both study Baor areas. The commonly cultured species were Labeo rohita, Catla catla, Hypophthalmichthys molitrix, Ctenopharyngodon idella, Cirrhinus cirrhosus, Mylopharyngodon piceus, and Cyprinus carpio, locally called “Raja Mach”. Various non-stocked fishes were also found in both Baors that reproduced naturally, locally called “Rani Mach”. In Nasti Baor, fish was harvested (Both Raja and Rani Mach) three to four times a year while it was two times in Baluhor Baor. Furthermore, fishers had access to harvest “Rani Mach” round the year in Baluhor Baor while there was no access in Nasti Baor. Annual production rate of Raja Mach (Kg/hectare) in Baluhor and Nasti Baor was 471.45 and 1806.45 respectively while in the case of Rani Mach the production rate (Kg/hectare) was 373.04 and 327.06 respectively in Baluhor and Nasti Baor. The current study also found a range of managemental, natural, economic, and social obstructions in Baor fisheries management.

International Journal of Fisheries and Aquatic Studies 2019; 7(4): 356-360 Status of ornamental fishes along with health issues in Sylhet division of Bangladesh

by Tanwi Dey and farjana chadnee

The study was conducted to assess the status of ornamental fishes along with health issues in Syl... more

Assessment of the livelihood status of fish farmers and aquaculture conditions in Habigonj Sadar Upazila under Habigonj district, Bangladesh

The experiment was conducted to assess the livelihood status of fish farmers and aquaculture cond... more The experiment was conducted to assess the livelihood status of fish farmers and aquaculture conditions in Habigonj Sadar upazila under Habigonj district for a period of six months from January 2018 to June 2018. The study revealed that maximum number of fish farmers (56%) was remaining between age group of 41-60 years, primary educated (38%), lived in joint family (72%) and majority (47%) had 5-6 family members. It was also found that maximum fish farmers had tin shed household (69%), used semi pacca toilet and used to go upazila health complex for treatment. Maximum fish farmers (90%) cultured fish in polyculture system where most of the ponds belong to multi ownership (39%) and the majority pond size was 0.05-0.50 ha (63%). Most of the fish farmers (46%) got their annual income as BDT 50,001-1,50,000 per year. Present study also identifies some important constraints to fish culture system in the study area.

FISH MARKETING SYSTEM AND SOCIO-ECONOMIC STATUS OF

The present study was conducted to identify the existing marketing system, availability of fish s... more

Species availability and business trend of ornamental fish in Sylhet division

International Journal of Fisheries and Aquatic Studies , 2019

This study investigated the marketing channels and present status of aquarium fish trade in diffe... more This study investigated the marketing channels and present status of aquarium fish trade in different districts of Sylhet division in Bangladesh over the period of six months from 5 December 2017 to 4 June 2018. Two upazilas from each district were considered for data collection. Data were collected by questionnaire interview method. Among four districts, the highest number of aquarium shops was recorded in Sylhet district. Aquarium fish shops not found in Sunamganj district. Eleven (11) number of aquarium shops were found in Sylhet division, where 26 aquarium fish species were accounted. Amongst, 25 were exotic ornamental fish species and an indigenous species (Rosy barb) has been observed. The fishes from order Cypriniformes were dominant in market. In the present study, Discus was the most expensive species (1300-1500 BDT/Pair) followed by Parrot (450-700BDT/Pair), Oscar (280-450BDT/Pair), Butterfly (250-350 BDT/Pair). Most of the other species were sold usually below 100 BDT/Pair. All aquarium fish species were imported from the internationals markets like Singapore, Malaysia, Thailand, etc. Importer/Wholesalers and breeders sell them to retailers, shopkeepers and finally the shop keepers sell them to the aquarium owners. During this survey, it was recorded that fish selling intensity decrease during winter months especially in January and February; and that time retailers engage themselves to other subsidiary business. The aquarium fish traders of Sylhet division were categorized into three groups such as (A) Aquarium fish traders of Sylhet district (63.63%) (B) Aquarium fish traders of Moulavibazar district (27.27%) and (C) Aquarium fish traders of Habiganj district (9.09%). The economic analysis shown that the Group A represent the highest benefit cost ratio and rate of return on total cost which were 1.42 and 27.034% respectively.

Some Reproductive Aspects of Freshwater Garfish, Xenentodon cancila (Hamilton, 1822) from North-East Bangladesh

by Tanwi Dey and Sohel Mian

E W = aL b ln(W) = ln(a)+b ln(L) s b-3 t = sb K F = 100×(W/L 3 )