The present study was conducted to identify the existing marketing system, availability of fish s... more The present study was conducted to identify the existing marketing system, availability of fish species and socio-economic status of Arotdars in Moulvibazar Sadar, Shreemongal and Kulaura from the period of January 2017 to December 2017. Highest amount was exotic fishes (67.49% in Kulaura to 70.46% in Shreemongal), lowest was small indigenous species (0.42% in Moulvibazar Sadar to 0.59% in Kulaura). The highest landing was 832841.43kg/yr (H. molitrix in Shreemongal), on contrary the lowest landing was 1284.14kg/yr (X. cancila in Moulvibazar Sadar). The highest price was varied from 5.39±0.18USD/kg (Sperata aor in Kulaura) to 0.78±0.47USD/kg (Pangasius sutchi in Shreemongal). Total marketing cost was 0.2779USD/kg and net margin was ranged from 0.167-0.194USD/kg. Education status of majority (54.55% in Moulvibazar Sadar) commission agents were Class VI-X but others (36.36% in Shreemongal to 45.45% in Kulaura) were not educated they only can sign. Major secondary occupations of the aratdars (45.45% in Moulvibazar Sadar) were business bur others (72.73% in Shreemongal to 81.82% in Kulaura) had no alternative professions and earn. They earned more than Tk.900 per day. About 63.64% Arotdars in Moulvibazar Sadar were rich but in Shreemongal (54.55%) and Kulaura (63.64%) were middle class. Majority (18.18 % in Shreemongal to 45.45% in Moulvibazar Sadar) earned Tk.100-200 per day as an alternative income source but in Kulaura had not any alternative source. A number of drawbacks were identified. Development of storage facilities, improvement of fish transport facilities, introduction of fish quality control measures were suggested to improve the fish marketing in the study area.
The present study was conducted to identify the existing marketing system, availability of fish s... more The present study was conducted to identify the existing marketing system, availability of fish species and socio
Breedingbiologyofasmall indigenousftshChannapuncrotuscollectedfromHllna beel and8ee/Kumari of Raj... more Breedingbiologyofasmall indigenousftshChannapuncrotuscollectedfromHllna beel and8ee/Kumari of Rajshahi wasstudjed during the period from April to october 2008. The fecundity of Chonno ponctotus collected from Hilna beelvaried from 391781989205 to 79220'8!844'689 and 2807!577.g2g to 20260.5:16.263 coiiected frorn Beet kumari. The relationship
GroMh performance of all male tilapia (Oreochromis niloticus) fry was evaluated in hapas set up i... more GroMh performance of all male tilapia (Oreochromis niloticus) fry was evaluated in hapas set up in earthen ponds located at Baneswar of Puthia Upazila under Rajshahi District. The experiment was conducted witn tne treatments of stocking densities viz. Tr (4000 fry hapa-l 1, T, (5000 fry hapa-1) and T: (6000 fry hapa-1) each and one control withiwo replications. Diets containing 30% protqin was applied at a rate ot 5-15% of body weight. Ttte average initial weight 9jfry was 0.1g. Final weight, mean weight gain, SGR and survival rate significanfly (P<0.01)varied from 6.61 (T3) to 8.80 (T1), 5.1s (T3) to 7.859 (Tl), 8.86 (T3) to 10.61% bwd'l (T1) ano 5t.so gj to.!4 50o/: (T1), respectively. Waier temperature (26.67 to 27.63oC), dissolved oxygen moming (2.sa to 2.89 hg L-'), pH (7.8 to 8.'l), ammonia-nitrcgen (0.06 to 0.12 mg L-1) and al'kalinity (12r.5r5Io 132.38 mlg'Li) did not vary significantly under the different keatments.
A study was carried out on the optimal dose of inorganic fertilizer used in carp polyculture syst... more A study was carried out on the optimal dose of inorganic fertilizer used in carp polyculture system over a period of 10 months. Three treatments were assigned: without inorganic fertilizer, with the application of 100 kg/ha/month inorganic fertilizer and 150 kg/ha/month inorganic fertilizer as T1, T2 and T3, respectively. Each treatment had three replications. The selected indigenous carp species were Rui (Labeo rohita), Catla (Catla catla) and Mrigal (Cirrhinus mrigala), and exotic carp species were silver carp (Hypophthalamichthys molitrix), grass carp (Ctenopharyngodon idella), common carp (Cyprinus carpio) and thai sarpunti (Barbodes gonionotus). The average water area of the experimental ponds was 0.11± 0.01 ha and average depth of water in all ponds was 1.26 m. The treatments showed no effect on water temperature, dissolved oxygen, alkalinity and pH. The fish production was significantly higher (P>0.05) in both the treatments T2 and T3 than that of T1 where no inorganic fertilizer was used. But there was no significant difference between T2 and T3 and T2 was with lower dose inorganic fertilizer (100 kg/ha/month) than T3. Therefore, 100 kg/ha/month inorganic fertilizers may be suggested in carp polyculture system for better production.
"r |}e p;riri-r eni. rsi' Z.rsoirsgy. llalshahr Unrversity. Rajshahi-62C5, Banglaeiesh)r:i:ni-ini... more "r |}e p;riri-r eni. rsi' Z.rsoirsgy. llalshahr Unrversity. Rajshahi-62C5, Banglaeiesh)r:i:ni-initnt of Ar]i;acuitL.ir*, S;rlhei AgricL:ltural University, Sylhet, Banqladesh Ab*tract: ;\n er;ierime:rri was can"ierl out using four chemicals (formalin, ure:1, clear, potent) with a .,ir,:'uri tri i'irri oL:1 a suitable ranlir: to be used in actual lethality irials. Tne experimental trial was ur-rlr.jirt*r} hr-e period of 7 tlays. "fhe nrortalit5r o{ fish was recordr;d al 1-day,2-day. 3-day, S-day ar.:ri 7-iiay iri ulca and 1'r:r'nralin treatment and 12h, 24lt and 30h in clear {heri:icide) and potent (irsi:r;ilr:i,Jr,:s) ifetrtment r:f r:xpr:sr-rre. Hundrsd percenl rnortality rsf Channa panct;itus was recorded irr lrlrrrxlrrr r:le:;,ir'and poient lrealments at [he enci of experirnental period. Mcrtaliiy of Chanrtawas rerci'rJ+ii 06.iii9,,, ai th+ concentralion of 2gll cf ur"ea and another dose was 100%. After lreatment sornillti"re tlir: fish st>ltle ilowrr tr-the bottonr ol thr: bowl arrd lhen gradually tall into cieath. At iow .oilr)entralioc tho rrod.alitv ocrtLirred slowly.'Th* fish sirowed various abncrntal behavrturs. the fish i,-or(: r-esilos:.i, r:rr:lsioni':llly.iLrrlped up with to and lro mo.remenl, haviitg lr-.ss eqt:ilif:rium and 1r,..:clrcnf Olrerculilr ectivity, ber:*mr) paralysed after a lime anrJ u{timately died. K*vwerlrl l1en.riri: i'.i.;ri:rlil", lntr*rj xctir:n [i;:nglacesh. an agr'*-i:asec' rri;erine country i:lcssed 're.,iilh a vasl area *f i:oth fresh water anci i:rarinr envii'nnmerrt, aird is one of the richest in As:a in respect of fr"esir water fishery. Channa i:)t.it'it.talt.ts is ;;n enderric fresh water fish fairnd t:vr,rrywlrre ir flanglacesh I hese fishes are coir-rr:roni;'r caileC si.:ake-irearjed fisir. The Bengali irfirre oi' lhis fish is Tal<l The; fish is unCer tire f;:rr:r iiy-C iii:nn rd;:s. li4*si oi li':e ferr:ers ci Banqladesh are iiiiterate. Ihr,:1,, arr: not conscrcrs about the *ffect af toxic .r,.t u i,i:c;rl:r.ltr on lilc anei elvrrtr':rlelt. Recomnrend ,..tirsct ald i.rso of ch*ilicals i$ iroi clearly knorrurr i* ihe iarmcls. 'f"rie larrlers are still using Ceadiy l'tazarri clertc*is, which are hanred natioilaily as 'rryell as iricrnnti*rraliy. A survoy corrrjucterj by 3r;rrr;lar:tsh Iisl r:rics Researci': lnstitule, Riverine qli4rir)'r tlh:;rirlnrrr r+ry31-led thAt abOUt 34% Of the ialmers ;rpnligC ci'ien:icals iir cver doses 76% af lie farrit*rt have iiiiie or no idea ab*ut the riielhorls *i chemrcals a0plicaiion and 7Aa*' rl)iur'.,ed iislr rror"tairty aftei' the L:se of chemicals ri; tlrerlr trrp Ireids if nl, i 991). i r;rr:1;l1f i! ii 5oli.ti,oit af aL:out 40'h by weight of i'orrraldehyce (ilCl-{O) gas in water (40S of lormaldchyrie in 100 mi of solution) lt has an orior lr-ral rs punqent ancl sL.rffocating;. lt is well known as i, !lrosef'v;rtrvs in nredicai lahoratorics, as arr in balm flL:id and as a sterilizer. Fornralin {heavily dili-iierJ form) is used as an aquatic chemo tnerapeutant (i.e. trealm*r:t against frsh diseases cau$ed by proiozr:a, fungi). The US Food ar':d Dr"ug Adminislr-atian appraved three commercial formaiin pr"oducls for Lrse in US food fish aquacilliure as parasiioids and fungicides. lt is how ev*r not approved for usage in aquacuiture in Austraiia. Ctuape afid ,Iapan because of iis association with r:nccller:esis (lumor development). The hazar-cls of clrernical contaffiinants have L:een kncwn since-1930. Taxicity nf spray or dust from chemicais in the aquatic errrrirnnmeni has been well known ci*curnented by Henderson *t al.
Effect of feed and fertilizer on the growth of monosex tilapia in pond was assayed from August to... more Effect of feed and fertilizer on the growth of monosex tilapia in pond was assayed from August to November 2013. The experiment trail was done with 4 treatments (T 0 control and T 1 only fertilizer, T 2 feed + fertilizer, T 3 feed) having 3 replications each. Lime was administrated at 617.5 kg/ha. The stocking density was 49400 (0.3 g each)/ha/ponds. In T 3 , two times feeding was done at 50% to 5% of their body weight Cow dung, urea and TSP were applied at 1482 kg/ha, 49.4 kg/ha and 49.4 kg/ha initially and 370.5 kg/ha, 9.88 kg/ha and 9.88 kg/ha weekly basis in T 1 and T 2 respectively. Samplings were done fortnightly and the significance level was assessed through one way ANOVA. Significant difference (P ≥ 0.05) was observed for growth indices such as final body weight, FCR, SGR and yield (kg/ha) among different treatments except T 2 and T 3 in case of SGR and survival rate. The highest survival rate (90%), gross yield (6.06±1.20 ton/ha), SGR (6.78±.015% per day) and BCR (2.01) were in T 3 with a minimum in T 0. Highest and lowest FCR value was 0.90±.06 and 0.79±.01 in T 2 and T 3 respectively. The result reveals that T 3 is the best monosex tilapia culture method in pond.
The present study was conducted to know the constraints and prospects of fish farming in Lalmonir... more The present study was conducted to know the constraints and prospects of fish farming in Lalmonirhat district of Bangladesh. The data were collected from 100 fish farmers through questionnaire interview for a period of four months from July 2014 to October 2014. Most of the ponds were perennial (72%) with an average size of 0.41 ha and a depth of 1.69 m. All the fish farmers practiced mostly carp polyculture system using different aquaculture inputs like fertilizer, feed, seed, and chemicals. They were usually found to collect fish seed from neighboring districts, mainly Bogra and Mymensingh. The main constrains were availability of quality seed, lack of scientific and technical knowledge, lack of manpower, outbreak of fish diseases, lack of credit facilities, high price of various inputs, low fish price, theft of fish and poisoning the pond water. Though there were many constraints, the fish production from aquaculture sector was increasing gradually in the study area. The total fish production from aquaculture in 2014 was projected 10,663 MT, while the fish production in 2010 was only 7600.4 MT in Lalmonirhat district. If the constraints could be solved, fish production in the study area would possibly be increased tremendously.
A trial was conducted to evaluate the effects of combination of soybean meal (SBN), mustard oilca... more A trial was conducted to evaluate the effects of combination of soybean meal (SBN), mustard oilcake (MOC), sesame oilcake (SOC) and linseed oilcake (LOC) as alternative for dietary fish meal (FM) protein for Labeo rohita fingerling for a period of 56 days. Six experimental diets were formulated by replacing 30, 50, 60, 70 and 100% (2 diets) of the total dietary fish meal protein by the combination of FM, SBM, MOC, SOC, and LOC. The combinations of the protein sources were as diet 1 (FM 100%), diet 2
The present study was conducted to assess the loads and impacts of agrochemicals used at Rajnagar... more The present study was conducted to assess the loads and impacts of agrochemicals used at Rajnagar upazilla near the Kawadighi haor. Data were collected from 180 farmers, 100 fishermen and 12 agrochemicals dealers through questionnaire interview. Most of the farmers were marginal farmers (47%). Amount of crop land used by 180 farmers was 239.258 hectors. Maximum farmers were cultivated Boro rice. Urea (0.223±8.114 metric tons), Triple Super Phosphate (0.143±4.137 metric tons) and Muriate of Potash (0.105±5.046 metric tons) were used in these areas. Those fertilizers were highly used in Munshibazar and low in Panchgaon. Basudin (14.5±0.707 L or kg/ha) and Sure (13.34±1.89 L or kg/ha) were highly used pesticide, found in study area. In the study area the yearly increment rate of pesticide in 2011 to 2015 was 1.077%, 1.091%, 1.019%, 1.084% and 1.067%, respectively. Most of the farmers were fully depended on fertilizers and pesticides to increase their production. For identifying disease, 12% farmers went to the pesticide dealer, 16% farmers were depended on Agriculture Officer and 72% farmers were own experienced. Pesticide dealer (83.33%) was the main source of fertilizers and pesticides. Besides it, sub-dealer and upazilla parishod were also the sources of fertilizer and pesticides. Only 15% farmers use all methods of Integrated Pest Management, 64% of the farmers had no idea on Integrated Pest Management and 21% respondents had low-level knowledge but they did not use. For overdoses, aquatic ecosystem in Kawadighi haor is polluted via drainage and irrigation of the field's water overflow, runoff, erosion and flash flood. Because of the expansive policy and minimize the increasing demand of staple food, the agrochemicals use has been increased tremendously in Rajnagar upazilla. These results suggest that farmers of Kawadighi Haor at Rajnagar Upazilla were used fertilizer and pesticides indiscriminately which had negative impacts on fisheries resources of this haor and adjacent areas.
Aquaculture remains a growing, vibrant and important food production sector. Chemicals and drugs ... more Aquaculture remains a growing, vibrant and important food production sector. Chemicals and drugs are widely used to increase aquaculture production in Bangladesh. A study was carried out to assess the aqua drugs and antibiotics used in aquaculture activities in north Chittagong of Bangladesh. Data were collected through questionnaire interview, personal contact, market survey and participatory rural appraisal like focus group discussion with fish hatchery owners, nursery and culture farmers, and retailers of aqua medicine and representatives of different pharmaceuticals companies. Major aquaculture species in experimental areas were combination of carps, tilapia and catfish (57%). Approximately 80 stakeholders were used to collect data from the selected upazilla of Chittagong and Cox's bazar district. Six categories of aqua drugs and chemicals were found to be used by fish farmers for water quality management, disinfectants, disease treatment, antibiotics and growth promoter. Most commonly used chemicals in this area including Geotox, Acmes Zeolite, Zeofresh, Lime, Zeo prime, Hunter, Vita plankton for the pond preparation and water quality management. 60% farmer use only lime while 22% use commercial zeolite and lime during pond preparation. Bleaching 14%, Potassium permanganate 40%, and 38% farmer use different commercial disinfectant for the treatment of disease. Bio-ox, Oxylife, Oxymax, and Oxymore are the available chemicals for increasing oxygen concentration in the pond. Renamycin, Otetra-vet 20%, Erisen-vet, Cotrim-Vet, AT-vet, Sulprim-vet and Sulfatrim were widely used antibiotics in this area. The study shows that lack of knowledge regarding use of chemicals, appropriate dose, method of application and indiscriminate use of antibiotics. This research finding will help to fish farming community to know the appropriate dose and administration methods for safe and sustainable aquaculture practices.
CITATIONS 0 READS 79 5 authors, including: Some of the authors of this publication are also worki... more CITATIONS 0 READS 79 5 authors, including: Some of the authors of this publication are also working on these related projects: Constraints and prospects of fish farming in Lalmonirhat district View project Potentials of modernization in fisheries sector of of Bangladesh: Study on the peoples' profile, technologies and policies. View project Ahmad Fazley Rabby Bangladesh fisheries research institute, Bangladesh
Water bodies often receive agrochemicals indiscriminately, but we know little about the effects o... more Water bodies often receive agrochemicals indiscriminately, but we know little about the effects of agrochemicals on the flora and fauna of the water bodies. In this study we assess the direct effects of pesticides and fertilizer on the fish production and biodiversity of two important beels; Hilna beel and Kumari beel of Rajshahi district, Bangladesh from July 2007 to June 2009. The result shows that in Hilna beel 2.92 kg ha-1 and Kumari beel 2.95 kg ha-1 pesticide was used. The amount was found to be increased 1.41 times for Hilna beel and 1.44 times for Kumari beel from 2005 to 2009. The results documented that fish production in both beels was decreased with the increment of pesticides used. The results obtained from this study will improve the understanding of the influence of agrochemicals on the important small indigenous fishes.
Water bodies often receive agrochemicals indiscriminately, but we know little about the effects o... more Water bodies often receive agrochemicals indiscriminately, but we know little about the effects of agrochemicals on the flora and fauna of the water bodies. In this study we assess the direct effects of pesticides and fertilizer on the fish production and biodiversity of two important beels; Hilna beel and Kumari beel of Rajshahi district, Bangladesh from July 2007 to June 2009. The result shows that in Hilna beel 2.92 kg ha -1 and Kumari beel 2.95 kg ha -1 pesticide was used. The amount was found to be increased 1.41 times for Hilna beel and 1.44 times for Kumari beel from 2005 to 2009. The results documented that fish production in both beels was decreased with the increment of pesticides used. The results obtained from this study will improve the understanding of the influence of agrochemicals on the important small indigenous fishes.
Population growth (length-weight relationship), and reproductive potential (e.g. fecundity, and s... more Population growth (length-weight relationship), and reproductive potential (e.g. fecundity, and sex-ratio) of five important fish species ('mola': Amblypharyngodon mola, 'puti': Puntius sophore, 'tengra': Mystus vittatus, 'shing': Heteropneustes fossilis and 'taki': Channa punctatus) collected from two important fresh water bodies (namely Hilna beel and Beel Kumari beel) Rajshahi, Bangladesh, were studied. Population growth pattern by length-weight relationship (W=aL b) for the species differed, and exhibited positive allometric growth (P. sophore in Hilna beel), isometric growth (A. mola and C. punctatus in Hilna beel) and negative allometric growth (M. vittatus & H. fossilis in Hilna beel and A. mola, P. sophore, M. vittatus, C. punctatus and H. fossilis in Beel Kumari beel). The results denoted that fecundity of mature females followed a non-linear relationship (F=aL b) with total length and exhibited positive allometric growth (b>3) with some exception (A. mola in Hilna beel and M. vittatus in Beel Kumari beel). Fecundity of mature females also increased with total body weight and ovary weight following a linear relationship (F=a+bW). Differences in values of sex-ratios with seasons for all species in this study may have resulted from different environmental factors as well as breeding seasons. The findings of this study would be useful in imposing adequate regulations for the conservation of these fascinating fishes in the fresh water bodies of Bangladesh.
A study was carried out to observe the production potential and environmental impacts on small in... more A study was carried out to observe the production potential and environmental impacts on small indigenous fish species in Kumari Beel and Hilna beel, two important water wetland resources of Rajshahi, Bangladesh from July 20014 to June 2016. A total of 93 species of bony fish and two species of prawn were recorded of which three were exotic. Average fish production was 272.07 and 266.75 kg/ha/year (Considering monsoon area) in Hilna in 2014-15 and 2015-16 respectively. There was a significant different (P<0.05) of the total production among the sites. Annual Fish production in Kumari Beel was 337.49 and 341.74 kg/ha (Considering monsoon area) in 2014-15 and 2015-16 respectively. Small indigenous fish dominates over the large and other in both the beels. Fish sanctuary has positive impacts on fish production and biodiversity of the beel. Number of species has increased from 88 to 92 and fish production has increased from 322.64 mt to 326.70 mt in the beel with intervention (Sanctuary) while in the control beel fish biodiversity and production has decreased (Biodiversity from 88 to 85 and production from 408.10 mt to 400.13 mt) beel.
Fish cage culture allows intensive production in waterbodies without conventional preparation for... more Fish cage culture allows intensive production in waterbodies without conventional preparation for aquaculture.Considering the importance and prospects of cage culture in Bangladesh, the present experiment was undertaken to study the effect of stocking density on growth performances and production potential of tilapia (Oreochromisniloticus) under cage culture conditions and to develop a suitable method of tilapia cage culture in inland open water body like Old Brahmaputra River. Three stocking densities (100, 150 and 200 fish m-3) of 2.78 g mean initial individual body weight of fingerlings in three different treatments (T-100, T-150 and T-200) each with three replicates were used. The fishes were supplied with high protein (30%) commercial feed at 10% of body weight twice daily. Water quality parameters namely transparency, temperature, pH, dissolved oxygen, phosphate were found within the suitable limit for fish culture.The result of the present study showed that the fish in the treatment T-150 resulted the best individual weight gain (90.72g), average daily gains (0.67 g), percent weight gains (3263%), specific growth rates (1.13%day-1) and the net production rates (13608gm-3 135 days-1)followed by treatments T-100 and T-200, respectively.The net yield and growth performances showed a significant difference with increasing stocking density (P<0.01). The most effective stocking density was150 fish m cage for Nile tilapia considering growth performances and production potential. Therefore, it can be concluded the growth performance of Nile tilapia is density dependent.
The levels of the physicochemical characteristics of water and their correlation matrix of two im... more The levels of the physicochemical characteristics of water and their correlation matrix of two important wetland beels namely Hilna beel and Kumari beel in the north western part of Bangladesh were determined once a month between July 2009 to June 2010 by using standard methods. A one way ANOVA, followed by DMRT analysis were used to analyze the effects of the rate of changes between the parameters and the interrelations among them. Results showed that variation exists in the water quality parameters examined, with such parameters as temperature, transparency, pH, conductivity, dissolved oxygen, total dissolved solids, nitrite nitrogen, alkalinity, total hardness, conductivity falling within the approved standard concentration for fish survival with slightly higher concentration exists in ammonia and chloride in both the beels whereas carbon di oxide and turbidity in Kumari beel. Most of the parameters were also strongly correlated with one another. Highly positive correlation was found between temperature with pH and hardness, nitrite nitrogen with ammonia and turbidity, pH with alkalinity and hardness, turbidity with ammonia, total dissolved solids with transparency and conductivity, and highly negative correlation between conductivity with transparency in Hilna beel whether in Kumari beel highly positive correlation was found between temperature with carbon di oxide and turbidity with ammonia and conductivity and highly negative correlation found between temperature with pH.
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.
The present study was conducted to identify the existing marketing system, availability of fish s... more The present study was conducted to identify the existing marketing system, availability of fish species and socio-economic status of Arotdars in Moulvibazar Sadar, Shreemongal and Kulaura from the period of January 2017 to December 2017. Highest amount was exotic fishes (67.49% in Kulaura to 70.46% in Shreemongal), lowest was small indigenous species (0.42% in Moulvibazar Sadar to 0.59% in Kulaura). The highest landing was 832841.43kg/yr (H. molitrix in Shreemongal), on contrary the lowest landing was 1284.14kg/yr (X. cancila in Moulvibazar Sadar). The highest price was varied from 5.39±0.18USD/kg (Sperata aor in Kulaura) to 0.78±0.47USD/kg (Pangasius sutchi in Shreemongal). Total marketing cost was 0.2779USD/kg and net margin was ranged from 0.167-0.194USD/kg. Education status of majority (54.55% in Moulvibazar Sadar) commission agents were Class VI-X but others (36.36% in Shreemongal to 45.45% in Kulaura) were not educated they only can sign. Major secondary occupations of the aratdars (45.45% in Moulvibazar Sadar) were business bur others (72.73% in Shreemongal to 81.82% in Kulaura) had no alternative professions and earn. They earned more than Tk.900 per day. About 63.64% Arotdars in Moulvibazar Sadar were rich but in Shreemongal (54.55%) and Kulaura (63.64%) were middle class. Majority (18.18 % in Shreemongal to 45.45% in Moulvibazar Sadar) earned Tk.100-200 per day as an alternative income source but in Kulaura had not any alternative source. A number of drawbacks were identified. Development of storage facilities, improvement of fish transport facilities, introduction of fish quality control measures were suggested to improve the fish marketing in the study area.
The present study was conducted to identify the existing marketing system, availability of fish s... more The present study was conducted to identify the existing marketing system, availability of fish species and socio
Breedingbiologyofasmall indigenousftshChannapuncrotuscollectedfromHllna beel and8ee/Kumari of Raj... more Breedingbiologyofasmall indigenousftshChannapuncrotuscollectedfromHllna beel and8ee/Kumari of Rajshahi wasstudjed during the period from April to october 2008. The fecundity of Chonno ponctotus collected from Hilna beelvaried from 391781989205 to 79220'8!844'689 and 2807!577.g2g to 20260.5:16.263 coiiected frorn Beet kumari. The relationship
GroMh performance of all male tilapia (Oreochromis niloticus) fry was evaluated in hapas set up i... more GroMh performance of all male tilapia (Oreochromis niloticus) fry was evaluated in hapas set up in earthen ponds located at Baneswar of Puthia Upazila under Rajshahi District. The experiment was conducted witn tne treatments of stocking densities viz. Tr (4000 fry hapa-l 1, T, (5000 fry hapa-1) and T: (6000 fry hapa-1) each and one control withiwo replications. Diets containing 30% protqin was applied at a rate ot 5-15% of body weight. Ttte average initial weight 9jfry was 0.1g. Final weight, mean weight gain, SGR and survival rate significanfly (P<0.01)varied from 6.61 (T3) to 8.80 (T1), 5.1s (T3) to 7.859 (Tl), 8.86 (T3) to 10.61% bwd'l (T1) ano 5t.so gj to.!4 50o/: (T1), respectively. Waier temperature (26.67 to 27.63oC), dissolved oxygen moming (2.sa to 2.89 hg L-'), pH (7.8 to 8.'l), ammonia-nitrcgen (0.06 to 0.12 mg L-1) and al'kalinity (12r.5r5Io 132.38 mlg'Li) did not vary significantly under the different keatments.
A study was carried out on the optimal dose of inorganic fertilizer used in carp polyculture syst... more A study was carried out on the optimal dose of inorganic fertilizer used in carp polyculture system over a period of 10 months. Three treatments were assigned: without inorganic fertilizer, with the application of 100 kg/ha/month inorganic fertilizer and 150 kg/ha/month inorganic fertilizer as T1, T2 and T3, respectively. Each treatment had three replications. The selected indigenous carp species were Rui (Labeo rohita), Catla (Catla catla) and Mrigal (Cirrhinus mrigala), and exotic carp species were silver carp (Hypophthalamichthys molitrix), grass carp (Ctenopharyngodon idella), common carp (Cyprinus carpio) and thai sarpunti (Barbodes gonionotus). The average water area of the experimental ponds was 0.11± 0.01 ha and average depth of water in all ponds was 1.26 m. The treatments showed no effect on water temperature, dissolved oxygen, alkalinity and pH. The fish production was significantly higher (P>0.05) in both the treatments T2 and T3 than that of T1 where no inorganic fertilizer was used. But there was no significant difference between T2 and T3 and T2 was with lower dose inorganic fertilizer (100 kg/ha/month) than T3. Therefore, 100 kg/ha/month inorganic fertilizers may be suggested in carp polyculture system for better production.
"r |}e p;riri-r eni. rsi' Z.rsoirsgy. llalshahr Unrversity. Rajshahi-62C5, Banglaeiesh)r:i:ni-ini... more "r |}e p;riri-r eni. rsi' Z.rsoirsgy. llalshahr Unrversity. Rajshahi-62C5, Banglaeiesh)r:i:ni-initnt of Ar]i;acuitL.ir*, S;rlhei AgricL:ltural University, Sylhet, Banqladesh Ab*tract: ;\n er;ierime:rri was can"ierl out using four chemicals (formalin, ure:1, clear, potent) with a .,ir,:'uri tri i'irri oL:1 a suitable ranlir: to be used in actual lethality irials. Tne experimental trial was ur-rlr.jirt*r} hr-e period of 7 tlays. "fhe nrortalit5r o{ fish was recordr;d al 1-day,2-day. 3-day, S-day ar.:ri 7-iiay iri ulca and 1'r:r'nralin treatment and 12h, 24lt and 30h in clear {heri:icide) and potent (irsi:r;ilr:i,Jr,:s) ifetrtment r:f r:xpr:sr-rre. Hundrsd percenl rnortality rsf Channa panct;itus was recorded irr lrlrrrxlrrr r:le:;,ir'and poient lrealments at [he enci of experirnental period. Mcrtaliiy of Chanrtawas rerci'rJ+ii 06.iii9,,, ai th+ concentralion of 2gll cf ur"ea and another dose was 100%. After lreatment sornillti"re tlir: fish st>ltle ilowrr tr-the bottonr ol thr: bowl arrd lhen gradually tall into cieath. At iow .oilr)entralioc tho rrod.alitv ocrtLirred slowly.'Th* fish sirowed various abncrntal behavrturs. the fish i,-or(: r-esilos:.i, r:rr:lsioni':llly.iLrrlped up with to and lro mo.remenl, haviitg lr-.ss eqt:ilif:rium and 1r,..:clrcnf Olrerculilr ectivity, ber:*mr) paralysed after a lime anrJ u{timately died. K*vwerlrl l1en.riri: i'.i.;ri:rlil", lntr*rj xctir:n [i;:nglacesh. an agr'*-i:asec' rri;erine country i:lcssed 're.,iilh a vasl area *f i:oth fresh water anci i:rarinr envii'nnmerrt, aird is one of the richest in As:a in respect of fr"esir water fishery. Channa i:)t.it'it.talt.ts is ;;n enderric fresh water fish fairnd t:vr,rrywlrre ir flanglacesh I hese fishes are coir-rr:roni;'r caileC si.:ake-irearjed fisir. The Bengali irfirre oi' lhis fish is Tal<l The; fish is unCer tire f;:rr:r iiy-C iii:nn rd;:s. li4*si oi li':e ferr:ers ci Banqladesh are iiiiterate. Ihr,:1,, arr: not conscrcrs about the *ffect af toxic .r,.t u i,i:c;rl:r.ltr on lilc anei elvrrtr':rlelt. Recomnrend ,..tirsct ald i.rso of ch*ilicals i$ iroi clearly knorrurr i* ihe iarmcls. 'f"rie larrlers are still using Ceadiy l'tazarri clertc*is, which are hanred natioilaily as 'rryell as iricrnnti*rraliy. A survoy corrrjucterj by 3r;rrr;lar:tsh Iisl r:rics Researci': lnstitule, Riverine qli4rir)'r tlh:;rirlnrrr r+ry31-led thAt abOUt 34% Of the ialmers ;rpnligC ci'ien:icals iir cver doses 76% af lie farrit*rt have iiiiie or no idea ab*ut the riielhorls *i chemrcals a0plicaiion and 7Aa*' rl)iur'.,ed iislr rror"tairty aftei' the L:se of chemicals ri; tlrerlr trrp Ireids if nl, i 991). i r;rr:1;l1f i! ii 5oli.ti,oit af aL:out 40'h by weight of i'orrraldehyce (ilCl-{O) gas in water (40S of lormaldchyrie in 100 mi of solution) lt has an orior lr-ral rs punqent ancl sL.rffocating;. lt is well known as i, !lrosef'v;rtrvs in nredicai lahoratorics, as arr in balm flL:id and as a sterilizer. Fornralin {heavily dili-iierJ form) is used as an aquatic chemo tnerapeutant (i.e. trealm*r:t against frsh diseases cau$ed by proiozr:a, fungi). The US Food ar':d Dr"ug Adminislr-atian appraved three commercial formaiin pr"oducls for Lrse in US food fish aquacilliure as parasiioids and fungicides. lt is how ev*r not approved for usage in aquacuiture in Austraiia. Ctuape afid ,Iapan because of iis association with r:nccller:esis (lumor development). The hazar-cls of clrernical contaffiinants have L:een kncwn since-1930. Taxicity nf spray or dust from chemicais in the aquatic errrrirnnmeni has been well known ci*curnented by Henderson *t al.
Effect of feed and fertilizer on the growth of monosex tilapia in pond was assayed from August to... more Effect of feed and fertilizer on the growth of monosex tilapia in pond was assayed from August to November 2013. The experiment trail was done with 4 treatments (T 0 control and T 1 only fertilizer, T 2 feed + fertilizer, T 3 feed) having 3 replications each. Lime was administrated at 617.5 kg/ha. The stocking density was 49400 (0.3 g each)/ha/ponds. In T 3 , two times feeding was done at 50% to 5% of their body weight Cow dung, urea and TSP were applied at 1482 kg/ha, 49.4 kg/ha and 49.4 kg/ha initially and 370.5 kg/ha, 9.88 kg/ha and 9.88 kg/ha weekly basis in T 1 and T 2 respectively. Samplings were done fortnightly and the significance level was assessed through one way ANOVA. Significant difference (P ≥ 0.05) was observed for growth indices such as final body weight, FCR, SGR and yield (kg/ha) among different treatments except T 2 and T 3 in case of SGR and survival rate. The highest survival rate (90%), gross yield (6.06±1.20 ton/ha), SGR (6.78±.015% per day) and BCR (2.01) were in T 3 with a minimum in T 0. Highest and lowest FCR value was 0.90±.06 and 0.79±.01 in T 2 and T 3 respectively. The result reveals that T 3 is the best monosex tilapia culture method in pond.
The present study was conducted to know the constraints and prospects of fish farming in Lalmonir... more The present study was conducted to know the constraints and prospects of fish farming in Lalmonirhat district of Bangladesh. The data were collected from 100 fish farmers through questionnaire interview for a period of four months from July 2014 to October 2014. Most of the ponds were perennial (72%) with an average size of 0.41 ha and a depth of 1.69 m. All the fish farmers practiced mostly carp polyculture system using different aquaculture inputs like fertilizer, feed, seed, and chemicals. They were usually found to collect fish seed from neighboring districts, mainly Bogra and Mymensingh. The main constrains were availability of quality seed, lack of scientific and technical knowledge, lack of manpower, outbreak of fish diseases, lack of credit facilities, high price of various inputs, low fish price, theft of fish and poisoning the pond water. Though there were many constraints, the fish production from aquaculture sector was increasing gradually in the study area. The total fish production from aquaculture in 2014 was projected 10,663 MT, while the fish production in 2010 was only 7600.4 MT in Lalmonirhat district. If the constraints could be solved, fish production in the study area would possibly be increased tremendously.
A trial was conducted to evaluate the effects of combination of soybean meal (SBN), mustard oilca... more A trial was conducted to evaluate the effects of combination of soybean meal (SBN), mustard oilcake (MOC), sesame oilcake (SOC) and linseed oilcake (LOC) as alternative for dietary fish meal (FM) protein for Labeo rohita fingerling for a period of 56 days. Six experimental diets were formulated by replacing 30, 50, 60, 70 and 100% (2 diets) of the total dietary fish meal protein by the combination of FM, SBM, MOC, SOC, and LOC. The combinations of the protein sources were as diet 1 (FM 100%), diet 2
The present study was conducted to assess the loads and impacts of agrochemicals used at Rajnagar... more The present study was conducted to assess the loads and impacts of agrochemicals used at Rajnagar upazilla near the Kawadighi haor. Data were collected from 180 farmers, 100 fishermen and 12 agrochemicals dealers through questionnaire interview. Most of the farmers were marginal farmers (47%). Amount of crop land used by 180 farmers was 239.258 hectors. Maximum farmers were cultivated Boro rice. Urea (0.223±8.114 metric tons), Triple Super Phosphate (0.143±4.137 metric tons) and Muriate of Potash (0.105±5.046 metric tons) were used in these areas. Those fertilizers were highly used in Munshibazar and low in Panchgaon. Basudin (14.5±0.707 L or kg/ha) and Sure (13.34±1.89 L or kg/ha) were highly used pesticide, found in study area. In the study area the yearly increment rate of pesticide in 2011 to 2015 was 1.077%, 1.091%, 1.019%, 1.084% and 1.067%, respectively. Most of the farmers were fully depended on fertilizers and pesticides to increase their production. For identifying disease, 12% farmers went to the pesticide dealer, 16% farmers were depended on Agriculture Officer and 72% farmers were own experienced. Pesticide dealer (83.33%) was the main source of fertilizers and pesticides. Besides it, sub-dealer and upazilla parishod were also the sources of fertilizer and pesticides. Only 15% farmers use all methods of Integrated Pest Management, 64% of the farmers had no idea on Integrated Pest Management and 21% respondents had low-level knowledge but they did not use. For overdoses, aquatic ecosystem in Kawadighi haor is polluted via drainage and irrigation of the field's water overflow, runoff, erosion and flash flood. Because of the expansive policy and minimize the increasing demand of staple food, the agrochemicals use has been increased tremendously in Rajnagar upazilla. These results suggest that farmers of Kawadighi Haor at Rajnagar Upazilla were used fertilizer and pesticides indiscriminately which had negative impacts on fisheries resources of this haor and adjacent areas.
Aquaculture remains a growing, vibrant and important food production sector. Chemicals and drugs ... more Aquaculture remains a growing, vibrant and important food production sector. Chemicals and drugs are widely used to increase aquaculture production in Bangladesh. A study was carried out to assess the aqua drugs and antibiotics used in aquaculture activities in north Chittagong of Bangladesh. Data were collected through questionnaire interview, personal contact, market survey and participatory rural appraisal like focus group discussion with fish hatchery owners, nursery and culture farmers, and retailers of aqua medicine and representatives of different pharmaceuticals companies. Major aquaculture species in experimental areas were combination of carps, tilapia and catfish (57%). Approximately 80 stakeholders were used to collect data from the selected upazilla of Chittagong and Cox's bazar district. Six categories of aqua drugs and chemicals were found to be used by fish farmers for water quality management, disinfectants, disease treatment, antibiotics and growth promoter. Most commonly used chemicals in this area including Geotox, Acmes Zeolite, Zeofresh, Lime, Zeo prime, Hunter, Vita plankton for the pond preparation and water quality management. 60% farmer use only lime while 22% use commercial zeolite and lime during pond preparation. Bleaching 14%, Potassium permanganate 40%, and 38% farmer use different commercial disinfectant for the treatment of disease. Bio-ox, Oxylife, Oxymax, and Oxymore are the available chemicals for increasing oxygen concentration in the pond. Renamycin, Otetra-vet 20%, Erisen-vet, Cotrim-Vet, AT-vet, Sulprim-vet and Sulfatrim were widely used antibiotics in this area. The study shows that lack of knowledge regarding use of chemicals, appropriate dose, method of application and indiscriminate use of antibiotics. This research finding will help to fish farming community to know the appropriate dose and administration methods for safe and sustainable aquaculture practices.
CITATIONS 0 READS 79 5 authors, including: Some of the authors of this publication are also worki... more CITATIONS 0 READS 79 5 authors, including: Some of the authors of this publication are also working on these related projects: Constraints and prospects of fish farming in Lalmonirhat district View project Potentials of modernization in fisheries sector of of Bangladesh: Study on the peoples' profile, technologies and policies. View project Ahmad Fazley Rabby Bangladesh fisheries research institute, Bangladesh
Water bodies often receive agrochemicals indiscriminately, but we know little about the effects o... more Water bodies often receive agrochemicals indiscriminately, but we know little about the effects of agrochemicals on the flora and fauna of the water bodies. In this study we assess the direct effects of pesticides and fertilizer on the fish production and biodiversity of two important beels; Hilna beel and Kumari beel of Rajshahi district, Bangladesh from July 2007 to June 2009. The result shows that in Hilna beel 2.92 kg ha-1 and Kumari beel 2.95 kg ha-1 pesticide was used. The amount was found to be increased 1.41 times for Hilna beel and 1.44 times for Kumari beel from 2005 to 2009. The results documented that fish production in both beels was decreased with the increment of pesticides used. The results obtained from this study will improve the understanding of the influence of agrochemicals on the important small indigenous fishes.
Water bodies often receive agrochemicals indiscriminately, but we know little about the effects o... more Water bodies often receive agrochemicals indiscriminately, but we know little about the effects of agrochemicals on the flora and fauna of the water bodies. In this study we assess the direct effects of pesticides and fertilizer on the fish production and biodiversity of two important beels; Hilna beel and Kumari beel of Rajshahi district, Bangladesh from July 2007 to June 2009. The result shows that in Hilna beel 2.92 kg ha -1 and Kumari beel 2.95 kg ha -1 pesticide was used. The amount was found to be increased 1.41 times for Hilna beel and 1.44 times for Kumari beel from 2005 to 2009. The results documented that fish production in both beels was decreased with the increment of pesticides used. The results obtained from this study will improve the understanding of the influence of agrochemicals on the important small indigenous fishes.
Population growth (length-weight relationship), and reproductive potential (e.g. fecundity, and s... more Population growth (length-weight relationship), and reproductive potential (e.g. fecundity, and sex-ratio) of five important fish species ('mola': Amblypharyngodon mola, 'puti': Puntius sophore, 'tengra': Mystus vittatus, 'shing': Heteropneustes fossilis and 'taki': Channa punctatus) collected from two important fresh water bodies (namely Hilna beel and Beel Kumari beel) Rajshahi, Bangladesh, were studied. Population growth pattern by length-weight relationship (W=aL b) for the species differed, and exhibited positive allometric growth (P. sophore in Hilna beel), isometric growth (A. mola and C. punctatus in Hilna beel) and negative allometric growth (M. vittatus & H. fossilis in Hilna beel and A. mola, P. sophore, M. vittatus, C. punctatus and H. fossilis in Beel Kumari beel). The results denoted that fecundity of mature females followed a non-linear relationship (F=aL b) with total length and exhibited positive allometric growth (b>3) with some exception (A. mola in Hilna beel and M. vittatus in Beel Kumari beel). Fecundity of mature females also increased with total body weight and ovary weight following a linear relationship (F=a+bW). Differences in values of sex-ratios with seasons for all species in this study may have resulted from different environmental factors as well as breeding seasons. The findings of this study would be useful in imposing adequate regulations for the conservation of these fascinating fishes in the fresh water bodies of Bangladesh.
A study was carried out to observe the production potential and environmental impacts on small in... more A study was carried out to observe the production potential and environmental impacts on small indigenous fish species in Kumari Beel and Hilna beel, two important water wetland resources of Rajshahi, Bangladesh from July 20014 to June 2016. A total of 93 species of bony fish and two species of prawn were recorded of which three were exotic. Average fish production was 272.07 and 266.75 kg/ha/year (Considering monsoon area) in Hilna in 2014-15 and 2015-16 respectively. There was a significant different (P<0.05) of the total production among the sites. Annual Fish production in Kumari Beel was 337.49 and 341.74 kg/ha (Considering monsoon area) in 2014-15 and 2015-16 respectively. Small indigenous fish dominates over the large and other in both the beels. Fish sanctuary has positive impacts on fish production and biodiversity of the beel. Number of species has increased from 88 to 92 and fish production has increased from 322.64 mt to 326.70 mt in the beel with intervention (Sanctuary) while in the control beel fish biodiversity and production has decreased (Biodiversity from 88 to 85 and production from 408.10 mt to 400.13 mt) beel.
Fish cage culture allows intensive production in waterbodies without conventional preparation for... more Fish cage culture allows intensive production in waterbodies without conventional preparation for aquaculture.Considering the importance and prospects of cage culture in Bangladesh, the present experiment was undertaken to study the effect of stocking density on growth performances and production potential of tilapia (Oreochromisniloticus) under cage culture conditions and to develop a suitable method of tilapia cage culture in inland open water body like Old Brahmaputra River. Three stocking densities (100, 150 and 200 fish m-3) of 2.78 g mean initial individual body weight of fingerlings in three different treatments (T-100, T-150 and T-200) each with three replicates were used. The fishes were supplied with high protein (30%) commercial feed at 10% of body weight twice daily. Water quality parameters namely transparency, temperature, pH, dissolved oxygen, phosphate were found within the suitable limit for fish culture.The result of the present study showed that the fish in the treatment T-150 resulted the best individual weight gain (90.72g), average daily gains (0.67 g), percent weight gains (3263%), specific growth rates (1.13%day-1) and the net production rates (13608gm-3 135 days-1)followed by treatments T-100 and T-200, respectively.The net yield and growth performances showed a significant difference with increasing stocking density (P<0.01). The most effective stocking density was150 fish m cage for Nile tilapia considering growth performances and production potential. Therefore, it can be concluded the growth performance of Nile tilapia is density dependent.
The levels of the physicochemical characteristics of water and their correlation matrix of two im... more The levels of the physicochemical characteristics of water and their correlation matrix of two important wetland beels namely Hilna beel and Kumari beel in the north western part of Bangladesh were determined once a month between July 2009 to June 2010 by using standard methods. A one way ANOVA, followed by DMRT analysis were used to analyze the effects of the rate of changes between the parameters and the interrelations among them. Results showed that variation exists in the water quality parameters examined, with such parameters as temperature, transparency, pH, conductivity, dissolved oxygen, total dissolved solids, nitrite nitrogen, alkalinity, total hardness, conductivity falling within the approved standard concentration for fish survival with slightly higher concentration exists in ammonia and chloride in both the beels whereas carbon di oxide and turbidity in Kumari beel. Most of the parameters were also strongly correlated with one another. Highly positive correlation was found between temperature with pH and hardness, nitrite nitrogen with ammonia and turbidity, pH with alkalinity and hardness, turbidity with ammonia, total dissolved solids with transparency and conductivity, and highly negative correlation between conductivity with transparency in Hilna beel whether in Kumari beel highly positive correlation was found between temperature with carbon di oxide and turbidity with ammonia and conductivity and highly negative correlation found between temperature with pH.
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.
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