- Bangladesh
Abm Mohsin
Rajshahi University, Fisheries, Faculty Member
- Captive Breeding, Fish diversity, Economics, Communication, Biology, Fisheries, and 18 moreEcology, Conservation Biology, Molecular Biology, Biodiversity, Wetland, Chalan Beel, Agriculture, Zoology, Environmental Education, Fish Biology, Biodiversity Conservation, Fish population dynamics, Exotic Species, Threatened species and ecosystems, Threatened Species Conservation, Diversity Indices, Threatened Species, and Shrimp diseaseedit
- Biologist of the University oF Rajshahi.edit
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Despite positive role of aquaculture in food production, the practice may impact the environment negatively and it is difficult to quantify the loss. In this study, we assessed land use changes in four important wetlands (Hardoho Beel,... more
Despite positive role of aquaculture in food production, the practice may impact the environment negatively and it is difficult to quantify the loss. In this study, we assessed land use changes in four important wetlands (Hardoho Beel, Angrar Beel, Shaoil Beel and Gopalpur Beel) of Bangladesh through analysis of historical satellite images (1990 – 2020) to show how expansion of aquaculture activities threatens the existence of freshwater wetlands. Since 1990, the water area of all four wetlands decreased significantly over time (all p < 0.001). Mean yearly loss of 47.9 ± 79.3 ha, 99.2 ± 185.5 ha, 51.2 ± 61.9 ha and 2.6 ± 4.7 ha were recorded for Hardoho Beel, Angrar Beel, Shaoil Beel and Gopalpur Beel respectively. A decreasing trend in wetland area was recorded in all wetlands, primarily due to excavation of aquaculture ponds. In 2020, aquaculture ponds represented 72% of the core wetland areas. Two wetlands (Hardoho and Gopalpur) were almost totally lost and converted to aquacu...
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In this study, we experimented the effects of starvation on survival performance and weight loss of exotic ornamental fishes of Bangladesh in aerated and non-aerated aquaria under laboratory condition. For this aim, a total of 14 fish... more
In this study, we experimented the effects of starvation on survival performance and weight loss of exotic ornamental fishes of Bangladesh in aerated and non-aerated aquaria under laboratory condition. For this aim, a total of 14 fish species were experimented under 13 genera, 09 families and 4 orders. It was set up under two treatments for each experiment. In each experimental treatment, three fishes of a same species were released and treated as replication in determining the survival performance. Fish weight loss and water quality were also measured. Comparatively higher survival performance was found in Pterophyllum scalare (T1, 836±4.32 hours and T2, 1022±4.02 hours) while lower was recorded for Hypostomus plecostomus (T1, 116±2.44 hours and T2, 160±3.87 hours). Weight loss varied from 0.05±0.01 g (Danio rerio, Poecilia reticulata, Poecilia sphenops and Gymnocorymbus ternetzi) to 0.33±0.09g (Trichogaster trichopterus). Water temperature, dissolved oxygen, free CO2, pH, total al...
Air-breathing fishes have become of great interest in recent years for several reasons in different countries over the world. These include the many adaptations of their respiratory and cardiovascular systems for obtaining oxygen from air... more
Air-breathing fishes have become of great interest in recent years for several reasons in different countries over the world. These include the many adaptations of their respiratory and cardiovascular systems for obtaining oxygen from air and water, adaptation in their food and feeding habits, reproduction and behavior. Also, they are important source of animal protein especially in drought and flood prone areas. At present, air-breathing fishes are gradually introducing in different aquaculture practices like cage culture, waste fed aquaculture etc. Unfortunately, there is no systematic record of air-breathing fishes in Bangladesh. Species profile of air-breathing fishes with special emphasis on their air-breathing organs are described in this document. So, we strongly believe that this document would be helpful to many scientists, students and teaching staff in Bangladesh and other countries.
Research Interests: Biology and Aquaculture
Exotic fishes have been introducing in Bangladesh since 1950; mainly for increasing aquaculture production and serving ornamental purposes; but there is no systematic record of these fish species is maintained in Bangladesh. Still new... more
Exotic fishes have been introducing in Bangladesh since 1950; mainly for increasing aquaculture production and serving ornamental purposes; but there is no systematic record of these fish species is maintained in Bangladesh. Still new species are introducing every year. These exotic species are playing a vital role in the total fish production as well as generating income and employment opportunities. Several species are also proved and considered as threat to the native species. In this work, status of exotic fishes are provided with special emphasis on brief description of their introduction, morphology, food and feeding, breeding, impacts and economic importance. We believe, this document would help those people who are interested in fish and Bangladesh fisheries and also working on exotic fishes, especially researchers, teachers, students involved in fisheries sector as well as aquarists too.
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Increased temperature, decreased water level and reduced culture period of the ponds are considered as major problems for aquaculture promotion in drought prone Barind area of Bangladesh. In order to address these problems, an experiment... more
Increased temperature, decreased water level and reduced culture period of the ponds are considered as major problems for aquaculture promotion in drought prone Barind area of Bangladesh. In order to address these problems, an experiment was conducted to optimize the stocking weight for carp polyculture ponds in Tanore upazila of Rajshahi district, Bangladesh. Three different stocking weights were tested under three treatments (T1: 25±0.12g; T2: 50± 0.15g; and T3: 100±0.19g), each with three replications. Fish growing period (July-December), carp species (C. catla, H. molitrix, A. nobilis, L. rohita and C. mrigala), stocking density (7,410 fishes/ha), lime and ash treatment, fertilization and feeding were same for all the treatments. Water quality (water temperature, dissolved oxygen, transparency, pH and alkalinity) and fish growth parameters were monitored monthly. Mean values of water quality parameters were found within the suitable range for fish culture. Treatment T3 varied mo...
Research Interests: Animal Science, Water quality, Fisheries, Biology, Drought, and 6 moreStocking, Fishery, Carp, Water Quality, Polyculture, and Silver Carp
A variety of methods and gears are being employed across the globe including Bangladesh. This study describes the underwater fishing method in the Padma River- one of the three largest rivers in Bangladesh. Standardised efforts have been... more
A variety of methods and gears are being employed across the globe including Bangladesh. This study describes the underwater fishing method in the Padma River- one of the three largest rivers in Bangladesh. Standardised efforts have been made for collecting data of interest between September 2016 and May 2017. Two types of underwater fishing, with or without using oxygen cylinders, were recorded. Mean duration of fishing per effort was higher (by 382%) when fishermen used oxygen cylinders. Mean water depth of fishing sites was also higher when oxygen cylinders were used. Three species of finfish (Rita rita, Sperata seenghala and Labeo calbasu) and one freshwater prawn species (Macrobrachium dayanum) have been identified in the catch. The catch was dominated by M. dayanum in both fishing types (27 ± 9.3 [with oxygen] and 15 ± 5.2 [without oxygen]). However, all the number of caught fish species varied significantly among different sampling months in both fishing methods (P < 0.001...
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Impacts of ineffective wastewater management on the biodiversity of receiving waters in developing countries are poorly documented. Using a before-after-control-impact methodology, we measured the effects of untreated wastewater release... more
Impacts of ineffective wastewater management on the biodiversity of receiving waters in developing countries are poorly documented. Using a before-after-control-impact methodology, we measured the effects of untreated wastewater release on the fish community in the Barnoi River, Bangladesh. In 2006, prior to untreated wastewater discharge, fish abundance, species richness and water quality were similar across sampling sites. In 2016, after 8 years of wastewater release to the downstream reach, fish abundance and species richness were reduced by >47% and >35% respectively at downstream sites compared to unaffected upstream sites and >51% and >41% lower respectively compared to the pre-wastewater discharge period. The wastewater impact was particularly severe during months of low discharge (October–December). Water transparency, dissolved oxygen and pH were lower (P < 0.001) at impacted downstream sites compared to upstream sites. Nineteen species (41.3% of all species ...
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This study was conducted in Narail district, Bangladesh between January and June, 2012; with a view to describing the status of rice- prawn-finfish based aquaculture practices. Average area of plots was 0.55±0.44 ha, of which mean ditch... more
This study was conducted in Narail district, Bangladesh between January and June, 2012; with a view to describing the status of rice- prawn-finfish based aquaculture practices. Average area of plots was 0.55±0.44 ha, of which mean ditch area was 4.35±2.02% of total land. All farmers dry their plots and made renovation prior to start of a new growing season followed by liming and fertilization. No standard stocking density was maintained, prawns were stocked at 15895 PL/ha, whereas fin fishes at 1551 seeds/ha. Commercial feed was applied in all the plots. Production of prawn, stocked and non-stocked finfishes were found 380.34±155.25 kg/ha; 713.65±352.99 kg/ha and 51.73±24.55 kg/ha respectively. Average cost and income for fish culture were 120514.07±36758.35 BDT/ha and 232497.48±76594.80 BDT/ha respectively. Average rice production was 4229.78±856.71 kg/ha. Low growth and high mortality of PL; scarcity, high and uprising price of feeds; and floods were identified as the major problems.
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This study was conducted in Rajshahi and Natore districts of northern area of Bangladesh for a period of three years (2007 to 2009). One hundred carp ponds were selected randomly and fish farmers were interviewed to reveal the existing... more
This study was conducted in Rajshahi and Natore districts of northern area of Bangladesh for a period of three years (2007 to 2009). One hundred carp ponds were selected randomly and fish farmers were interviewed to reveal the existing constraints and prospects. Ten percent farmers reported multiple ownership as a problem and 16% farmers stated that lease value of pond is too high which reducing their profit level. Lack of quality fish seeds was reported by 33% farmers which results in low growth and high mortality of fishes. Nine percent carp farmers reported that inorganic fertilizers were not giving expected performances. Thirty three percent carp farmers failed to apply required inputs in due time due to lack of sufficient credit. Plankton bloom was recorded in 18% ponds. Three percent fish farmers were found to be affected by flood and drought. Eight percent farmers reported non-severe attack of disease. Fish poaching and poisoning were revealed as major constraints. Thirty six...
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Key words: hatchery; brood fish; breeding; spawning; fish fry Univ. j. zool. Rajshahi Univ. Vol.21, 2002. pp. 73-76
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The fish fauna of the Atrai River were studied for a period of two years from January 2011 to December 2012. Sampling was carried out by several fishing nets and traps on fortnight basis. A total of 74 fish species belonging to 27... more
The fish fauna of the Atrai River were studied for a period of two years from January 2011 to December 2012. Sampling was carried out by several fishing nets and traps on fortnight basis. A total of 74 fish species belonging to 27 families and 52 genera were recorded. Cyprinidae was the most dominant family contributing 18 species in 9 genera. Two alien species were found- Hypophthalmichthys molitrix and Hypostomus plecostomus. Thirty locally threatened species (Vulnerable 13.51%, Endangered 18.92% and Critically Endangered 8.11%) were recorded. But, no globally threatened species was found. Relative abundance of majority 36.49% species was rare. Global population trend of 24.32% recorded fish species was Declining. The highest number of species (42) was recorded in the November 2011. Whereas, the lowest the number of fish species (12) recorded in June and August 2011. Very high correlation was found between fish species and physical environmental parameters (air temperature, water ...
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In this study, we experimented the effects of starvation on survival performance and weight loss of exotic ornamental fishes of Bangladesh in aerated and non-aerated aquaria under laboratory condition. For this aim, a total of 14 fish... more
In this study, we experimented the effects of starvation on survival performance and weight loss of exotic ornamental fishes of Bangladesh in aerated and non-aerated aquaria under laboratory condition. For this aim, a total of 14 fish species were experimented under 13 genera, 09 families and 4 orders. It was set up under two treatments for each experiment. In each experimental treatment, three fishes of a same species were released and treated as replication in determining the survival performance. Fish weight loss and water quality were also measured. Comparatively higher survival performance was found in Pterophyllum scalare (T1, 836±4.32 hours and T2, 1022±4.02 hours) while lower was recorded for Hypostomus plecostomus (T1, 116±2.44 hours and T2, 160±3.87 hours). Weight loss varied from 0.05±0.01 g (Danio rerio, Poecilia reticulata, Poecilia sphenops and Gymnocorymbus ternetzi) to 0.33±0.09g (Trichogaster trichopterus). Water temperature, dissolved oxygen, free CO2, pH, total al...
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The behaviour of fourteen exotic ornamental fishes of Bangladesh under starved condition in aquaria was experimented from January to December, 2011. Fishes were belonging to 13 genera, 09 families and 4 orders. Two treatments each with... more
The behaviour of fourteen exotic ornamental fishes of Bangladesh under starved condition in aquaria was experimented from January to December, 2011. Fishes were belonging to 13 genera, 09 families and 4 orders. Two treatments each with three replications were used. Four different behavioural phases of fish were monitored through constant observation. Almost all the behavioural phases were seen earlier in the fishes of treatment T1. Marble angel survived more (1022±4.02 hrs; T2) than others. The lowest survival period (116±2.44 hrs; T1) was seen for albino suckermouth. Fishes were died earlier in T1 than T2, due to presence or absence of aeration facilities. Water temperature, dissolved oxygen, free CO2, pH, total alkalinity, ammonia-nitrogen and chlorine level were found to be varied from 25.66±0.17 to 28.66±0.35°C, 3.80±0.06 to 4.73±0.07 mg/l, 9.21±0.05 to 11.75±0.03 mg/l, 7.13±0.05 to 7.47±0.07, 76.66±1.64 to 108.92±3.20 mg/l, 0.0010±0.0006 to 0.0133±0.002 mg/l and 0.0045±0.001 to...
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The study was conducted in Dhaka, Bangladesh. It was carried out for twelve (12) months from March 2018 to February 2019 to prepare a complete update checklist of native and non-native aquarium fishes of Bangladesh. During the current... more
The study was conducted in Dhaka, Bangladesh. It was carried out for twelve (12) months from March 2018 to February 2019 to prepare a complete update checklist of native and non-native aquarium fishes of Bangladesh. During the current study, 270 varieties (230 freshwater, 36 marine, and 4 brackish water) belong to 149 species (109 freshwater 73 %, 36 marines 24 %, and 4 brackish water 3 %) of 38 families under 10 orders and 6 crossbreeds’ varieties were recorded. Considering the number of species maximum 83 (55.70 %) was found under the order Perciformes followed by Cypriniformes 24 (16.10 %), Characiformes 18 (12.08 %), Siluriformes 11 (7.38 %), Osteoglossiformes 05 (3.35 %), Atheriniformes 03 (2.01 %), Lepisosteiformes 02 (1.34 %), Polypteriformes 01 (0.6 %), Myliobatiformes 01 (0.67 %) and Cyprinodontiformes 01 (0.67 %). The top five popular species were guppy (13.16 %) followed by goldfish (12.39 %), molly (8.54 %), angelfish (6.23 %), platy (5.93 %). The number of fish species&...
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An aquarium is an enclosed body of water containing a mixture of selected and unselected captive living aquatic organism. It is essentially unstable and to obtain stability must be carefully designed and managed (Suxena 2003). Recently... more
An aquarium is an enclosed body of water containing a mixture of selected and unselected captive living aquatic organism. It is essentially unstable and to obtain stability must be carefully designed and managed (Suxena 2003). Recently aquarium technology means that the technical ...