Zoarder Ahmed

Zoarder Ahmed
Bangladesh Agricultural University | BAU · Department of Fisheries Management

BSc&MSc (BAU); MS&PhD (Jpn); PostDoc (UK) in Fisheries

About

124
Publications
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2,171
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Publications

Publications (124)
Article
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The generalized length-length relationships of Chanda nama ((Hamilton, 1822) belongs to Ambassidae were studied separately for a period of a calendar year collected from the Old Brahmaputra River, Mymensingh, Bangladesh for male, female and combined populations. A total of 1170 specimens were examined where 599 were male and 571 were female. The st...
Article
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The present study revealed on temporal variations of length, weight and condition of Heteropneustes fossilis (Bloch, 1794) in the Ganges River, Northwestern Bangladesh. Total 1161 individuals of H. fossilis were caught by various habitual fishing gears such as seine net, cast net and gill net during January to December 201 9. For every specimen, bo...
Article
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Spawning season, recruitment, and growth of the freshwater prawn Macrobrachium lamarrei were studied in a perennial wetland, northeastern Bangladesh during October 2016 to September 2017. Spawning season was estimated based on the monthly variations of percent ovigerous females. Recruitment and growth were estimated using the time series of the len...
Article
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The reproductive biology of the silver hatchet chela, Chela cachius, was addressed in the present study. A total of 1200 specimens were caught by fine meshed seine nets from a large perennial water body in Bangladesh Agricultural University Campus, Mymensingh. The gonadosomatic index and the histological examination suggested that the spawning seas...
Article
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The intercept as the coefficient of algebraic relationship between standard length (SL) and total length (TL), the two predominantly used linear dimensions of fin fish species, was referred to growth pattern deduction for rainbow sardine Dussumieria acuta population in the Bay of Bengal. Monthly rainbow sardine samples were collected from the indus...
Article
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Growth pattern of pama croaker Otolithoides pama population in the Bay of Bengal was determined as the corollary of relationships between standard length (SL) and total length (TL), the two most prevalently used linear dimensions of fin fish species. Monthly pama croaker samples were collected from the industrial fisheries in the Bay of Bengal. The...
Article
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The present study aims to estimate the fecundity, maturity and gonadal indices of Clupisoma garua population existing in the old Brahmaputra River, Bangladesh. The samples were collected once every month from the 1st April 2016 to the 31st March 2017 and yielded a total of 90 females and 19 males. The standard length (SL) and the body weight (BW) o...
Article
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Satkhira Southwestern region Bangladesh Shrimp has become one of the most important export products in recent decades due to increasing international demand. Shrimp farming is performing significant role in the livelihoods of rural people of southwestern part of Bangladesh which is considered the core areas for shrimp farming. To continue the trend...
Article
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This study evaluated duck-fish integration to the diet of households to improve food and nutrition security. The study was undertaken at Bolli village in Netrokona of Bangladesh for a period of 3 months from October to December 2017. It was done by questionnaire interviews of households, key informant interviews, and secondary data. Most of the hou...
Article
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The present study was conducted to investigate the growth parameters, length-weight relationship and diverse mortality rates of Bombay duck Harpadon nehereus, from Northeastern tip of the Bay of Bengal. The length weight data were collected from January to December 2017 where a total number of 2054 individuals of both sex were analyzed. The von Ber...
Article
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Biological features including sex ratio, length-frequency distributions (LFDs), size at sexual maturity, spawning season, length-weight relationships (LWRs) and condition factor of Chanda nama were studied in the Old Brahmaputra River, Bangladesh. There was no significant difference in sex ratio. LFDs indicated no significant differences in size be...
Article
Some biological parameters of Salmostoma bacaila – including sex ratio, length-frequency distributions (LFDs), size at sexual maturity, spawning season, length-weight relationships (LWRs) and condition factor – were studied. Samples were collected seasonally during June 2017 to May 2018 from a tributary of the Payra River. The overall sex ratio was...
Article
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This study was intended to assess the effect of gonadal weight on the length-weight relationships for year-round samples of river catfish (Clupisoma garua) collected from Old Brahmaputra River, Bangladesh. The standard length (SL) and body weight (BW) of females varied from 11.8 to 27.8 cm and 23.26 g to 272.23 g. Likewise, the length of male range...
Article
Full-text available
Some biological parameters of Salmostoma bacaila-including sex ratio, length-frequency distributions (LFDs), size at sexual maturity, spawning season, length-weight relationships (LWRs) and condition factor-were studied. Samples were collected seasonally during June 2017 to May 2018 from a tributary of the Payra River. The overall sex ratio was sig...
Article
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Hilsa is an anadromous fish that spends adulthood in marine habitats, breeds in estuaries and rivers, and grows through early stages in major rivers and their tributaries. Since the species spends different stages in different habitats, its food and feeding habits differ throughout the course of its lifecycle. Feed composition may also vary with se...
Article
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The age and growth of ticto barb, Puntius ticto (Hamilton 1822) belonging to the family cyprinidae was studied extensively to gain a knowledge on growth rates and to determine the success and degree of establishment as well as to forecast the fish's impact on native fauna. A total of 1061 individuals were collected from the Old Brahmaputra river fr...
Article
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An informative study was carried out on 30 shrimp farmers of Shyamnagar upazilla in Satkhira district, situated in the southwestern coastal region of Bangladesh. The study was conducted to evaluate the livelihood analysis of the farmers based on progressive shrimp farming. The findings showed that majority of the respondents (56.67%) were dependent...
Article
One of the most important blossom trades in the economy of Bangladesh is fish marketing. To understand the current practices of fish market and marketing systems in Bogura district of Bangladesh, an investigation was conducted based on existing marketing system and economic features of marketing activities and inefficiencies. Fish marketing is almo...
Article
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One of the most important blossom trades in the economy of Bangladesh is fish marketing. To understand the current practices of fish market and marketing systems in Bogura district of Bangladesh, an investigation was conducted based on existing marketing system and economic features of marketing activities and inefficiencies. Fish marketing is almo...
Research
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A comparative study between pre-juvenile hilsa shad (Tenualosa ilisha) and Indian river shad (Gudusia chapra) using systematics study (morphometric measurements, meristic counts and external morphology) was conducted and significant differences were found between them. The findings of the present study will act as a catalogue to distinguish pre-juv...
Article
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The current study presents the first complete and comprehensive description of population structure, growth pattern (length-weight relationships, LWRs; length-length relationships, LLRs), maturity (size at first sexual maturity; Lm), form factor (a3.0) and natural mortality (MW) of Amblypharyngodon mola (Hamilton, 1822) in the Ganges River, northwe...
Article
The gobioid fish Apocryptes bato (Hamilton, 1822) is a species of mudskipper found in Bangladesh, India, and Myanmar. The reproductive biology of A. bato including sex ratio, size at sexual maturity, breeding season, fecundity, and condition factor was studied in the Payra River, southern Bangladesh during May 2016 to April 2017. A total of 1,028 s...
Article
Length–weight relationships (LWRs) and length–length relationships (LLRs) of three ecologically important fishes (Aplocheilus panchax, Danio rerio and Esomus danrica) were reported from a wetland, northeastern Bangladesh (23 58 N, 89 38 E). Samples were collected monthly using traditional fishing gear including fine meshed (2.0 mm) push net and fin...
Article
This study describes the life history traits of Puntius sophore (Hamilton, 1822) including, length frequency distributions (LFDs), length-weight relationships (LWRs), length-length relationships (LLRs), condition factors (allometric, K A ; Fulton′s, K F ; relative, K R and relative weight, W R), form factor (a 3.0), first sexual maturity (L m) and...
Article
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A study was carried out in the Kaptai Lake of Bangladesh to determine the present condition of Nile tilapia (Oreochromis niloticus), tilapia fishers, fishing gears, catch records and management policies. Data were collected by personal observation and other participatory methods in a year. It was found that tilapia productions were high in 1999-200...
Article
Length-weight relationships (LWRs) and length-length relationships (LLRs) for three small indigenous fishes (Esomus danrica, Pachypterus atherinoides and Salmostoma bacaila) were reported from the Payra River, southern Bangladesh. Samples were collected using traditional fishing gear including cast net (mesh size ranges from 1.0 to 2.0 cm), seine n...
Article
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Histopathological study was carried out with the gills of female striped gourami (Trichogaster fasciata) exposed to chlorpyrifos 20 EC. The main objective of the present work was to evaluate the effects of chlorpyrifos to observe the histopathological alterations on gills of striped gourami caused by chlorpyrifos toxicity. To conduct the experiment...
Article
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The growth and longevity of Amblypharyngodon mola was studied in the Payra River, southern Bangladesh, using length-frequency distributions during February 2016-January 2017. Both males and females first recruited in June, with modal size around 25 mm standard length. Growth for both sexes was described by the von Bertalanffy growth equation as: Lt...
Article
The present study provides the estimates of length-weight relationships (LWRs) and length-length relationships (LLRs) of two gobiid fishes Eleotris fusca and Odontamblyopus rubicundus from the Payra River, southern Bangladesh. Fish samples were collected from the set bagnet (mesh size <2 mm) fishers of the Payra River in July 2016. Allometric coeff...
Article
Present study described age and growth of spotted snakehead, Channa punctata (Bloch, 1793) locally known as taki belongs to the family Channidae. A total of 1200 fish were collected from kajla beel at Mohongonj. Therefore, age and growth pattern of C. punctata was established by direct fit of length frequency data both to standard and modified von...
Article
Full-text available
Present study described age and growth of spotted snakehead, Channa punctata (Bloch, 1793) locally known as taki belongs to the family Channidae. A total of 1200 fish were collected from kajla beel at Mohongonj. Therefore, age and growth pattern of C. punctata was established by direct fit of length frequency data both to standard and modified von...
Article
Full-text available
Length-weight relationships (LWRs) and length-length relationships (LLRs) of Apocryptes bato were studied in the Payra River, southern Bangladesh. Monthly samples were collected from the small-scale fishers of set bag net fishery in the Payra River during May 2016 to April 2017. All specimens were separated on the basis of sex and standard length (...
Article
Full-text available
Biological aspects including size at sexual maturity, breeding season and condition factor of Amblypharyngodon mola was studied in the Payra River, southern Bangladesh during February 2016-January 2017. All specimens were sexed and standard length (SL), body weight (BW) and gonad weight (GW) were measured. The gonadosomatic index (GSI) increased wi...
Article
Full-text available
Sex ratio, length-weight and length-length relationships of Amblypharyngodon mola were studied in the Payra River during February 2016-January 2017. Monthly samples were collected from the small-scale fishers of set bagnet fishery in the Payra River. All specimens were sexed out and standard length (SL), total length (TL), fork length (FL) and body...
Article
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Assessment of fish stock assists fisheries managers in taking decisions toward sustainable fisheries. The study was conducted to find out the sex ratio, growth pattern and state of physical well being of Hemibagrus menoda in the Kangsha River Netrakona, Bangladesh. Report on the aspects of reproductive biology of this species in Bangladesh has so f...
Article
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The length–weight relationships (LWRs) were studied for 814 individuals covering eight families and 12 species of fish, e.g., Botia dario, Botia lohachata, Channa orientalis, Esomus danricus, Heteropneustes fossilis, Macrognathus pancalus, Nandus nandus, Ompok pabda, Pethia phutunio, Pethia ticto, Trichogaster fasciata and Trichogaster lalius captu...
Article
The pandalid genus Plesionika Bate, 1888 includes 93 species and has a widespread distribution including mainly subtropical and tropical waters and some temperate waters, but most species can be found in the Indo-West Pacific. The species of this genus are benthic or nektobenthic, feeding on pelagic and benthic resources. Up to the present, the occ...
Article
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The study was designed to work on the determination of growth pattern of lesser spiny eel Macrognathus aculeatus (Bloch, 1786) evaluating length-length relationships. Lesser spiny eel is a small indigenous fish species collected monthly for a year from Dingaputa haor located at Mohanganj upazila of Netrokona district in Bangladesh. The standard len...
Article
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Feeding ecology of Puntius ticto, of the river Old Brahmaputra near Bangladesh Agricultural University, Mymensingh was studied. The fish, locally known as Tit punti, belongs to the family Cyprinidae. Fishes were sampled from February 2010 to January 2011. Stomach content, seasonal variation of food and feeding habits and size group relationship wit...
Article
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Present study was conducted to assess fish species availability in the Rupsha River during February 2012 to January 2013. A total of 64 species of fish under 11 orders and 30 families were documented during the study period. Perciformes was the most dominant order constituting 34.38% of the total fish population followed by the Cypriniformes (25%),...
Article
Length–weight relationships (LWRs) and length–length relationships (LLRs) are presented for the first time for three Ambassid fish species from the Ganges River, northwestern (NW) Bangladesh. Fish were sampled with traditional fishing gear including cast net (mesh size ranges from 1.0 to 2.0 cm), gill net (mesh size ranges from 1.5 to 2.5 cm), squa...
Article
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The threatened indigenous small fish, Mystus vittatus (Bloch 1794) is a commercially important fish of Bangladesh. The present study describes the fecundity and its relationships with some of the morphometrics and condition factors (Fulton's, KF; Relative weight, WR) of M. vittatus. A total of 50 matured female M. vittatus were collected using the...
Book
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Fisheries play an important role in meeting global food demands. But coastal fisheries are in decline due to overfishing – and fisheries management in developing world countries is also complicated by significant poverty levels. In response, fisheries managers are increasingly using economic incentive-based approaches to reward beneficiaries – such...
Article
Full-text available
The size at sexual maturity of the female Puntius sophore was estimated in the Old Brahmaputra river, North eastern Bangladesh, using direct observation of sexual characters (e.g., gonadosomatic index) and by the indirect way using relative growth. Monthly samples were collected using a combination of fine-meshed cast nets and seine nets. All speci...
Article
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Climbing perch Anabas testudineus is commercially important fish in Asian countries, mostly in Bangladesh, China, India, Malaysia, Pakistan, Sri Lanka and Thailand. Also, it is used as valuable food fish in different countries of the world. Nevertheless, its natural populations are seriously declining due to heavy harvest, habitat destruction and o...
Article
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Spiny eel Mastacembelus armatus is one of the economically important species both as food and for aquarium trades in Asian countries but the natural population is decreasing due to over-exploitation and for various ecological imbalances including the changes in its natural habitats. This paper suggests steps for the sustainable conservation of the...
Article
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Orangefin labeo Labeo calbasu is one of the commercially and nutritionally valuable food fish in Asian countries including Bangladesh, India, Nepal, Pakistan, Thailand and China. Unfortunately, natural populations of this species are decreasing due to over-exploitation and various biological changes to its habitats. This article suggests the steps...
Article
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The present study describes the length-weight relationships (LWRs) for nine fish species from the Tetulia River, southern Bangladesh, namely Anabas testudineus, Coilia dussumieri, Otolithoides biauritus, Otolithoides pama, Pethia conchonius, Polynemus paradiseus, Puntius lateristriga, Setipinna taty and Sillaginopsis panijus. A total of 1380 specim...
Article
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This study was carried out on age and growth of hilsa shad, Tenualosa ilisha in river Tentulia in Bhola district using monthly samples from January to December 2009 by checking annual rings or growth checks on hard parts. Age and growth of T. ilisha got progressed by direct fit of length frequency data both to standard and to modified von Bertalanf...
Article
This study was carried out on age and growth of hilsa shad, Tenualosa ilisha in river Tentulia in Bhola district using monthly samples from January to December 2009 by checking annual rings or growth checks on hard parts. Age and growth of T. ilisha got progressed by direct fit of length frequency data both to standard and to modified von Bertalanf...
Article
Full-text available
Bengal loach Botia dario is a valuable food fish in South Asian countries including Bangladesh, Bhutan, India and Nepal. However, the wild population is declining due to heavy harvest, habitat loss and its ecological changes. This paper suggests actions for the conservation of the lasting isolated populations of B. dario in Asian countries.
Article
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Objective: To assess the catch composition and seasonal variation in catch of set bagnet fishery from the coastal Payra river, to understand the importance and impact of set bagnet fishery on biodiversity and fisheries, and to find out feasible strategies to reduce the negative impact of set bagnet fishery. Methods: The research was conducted with...
Article
Full-text available
The length-weight relationships (LWRs) of Macrobrachium lamarrei (H. Milne-Edwards, 1837) was studied to construct the generalized relationships of body weight to carapace length measurements for male, female and combined prawn population separately over a calendar year. A total of 1018 specimens were used for this study. The parameter values of th...