Bangladesh Journal of Fisheries最新文献_第4页

Plastic pollution in an estuary: A preliminary study on the Rupsha river in southwestern Bangladesh 河口的塑料污染:孟加拉国西南部鲁普沙河的初步研究

Bangladesh Journal of Fisheries Pub Date : 2022-03-28 DOI: 10.52168/bjf.2021.33.32

Joyanta Bir, Md. Rony Golder, Prianka Biswas, Suraiya Tasrin, S. Chowdhury

{"title":"Plastic pollution in an estuary: A preliminary study on the Rupsha river in southwestern Bangladesh","authors":"Joyanta Bir, Md. Rony Golder, Prianka Biswas, Suraiya Tasrin, S. Chowdhury","doi":"10.52168/bjf.2021.33.32","DOIUrl":"https://doi.org/10.52168/bjf.2021.33.32","url":null,"abstract":"Plastic pollution is one of the major threats to the biodiversity of coastal mangrove forest Sundarbans. The current research focused on the preliminary assessment of plastics load to benthic biodiversity in a major estuary, the Rupsha in southwestern Bangladesh. Visual studies were conducted at five different sampling sites based on human activities, viz Kalibari ghat (S1), Rupsha ferry ghat (S2), Lobonchora ghat (S3), Rupsha bridge ghat (S4) and Putimari ghat (S5 as reference site). Thirteen (13) different plastic types under three categories were identified from the five-study sites. These categories belong to (i) fishing related debris: net, line, buoy, other fishing materials (ii) domestic useable plastics: bottle, bucket, bag/film, foamed polystyrene and polythene, and (iii) category of other types including packet, rope, pipe and shoes. Among all types, packet and polythene were the most abundant in number and both of them were the highest in number in Rupsha ferry ghat (8.67±3.79 for polythene and 9.33±5.86 for packet) whereas lowest in S5 (0.67±0.58 for polythene). Overall, the highest number of plastics (individual items) was identified in S2 station (36±12.5) following to S4 station (24.33±1.53) and lowest at S5 (3.33±0.58). Biodiversity index were also calculated where higher species richness (D) and Shannon index (H) were observed to be higher in S5 compared to other sampling sites.","PeriodicalId":213044,"journal":{"name":"Bangladesh Journal of Fisheries","volume":"121 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122151681","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optimum stocking density of stinging catfish (Heteropneustes fossilis) based carp polyculture in homestead ponds in a drought prone area of Bangladesh 孟加拉国干旱易发地区以刺鲶(Heteropneustes化石)为基础的家庭池塘鲤鱼混养的最佳放养密度

Bangladesh Journal of Fisheries Pub Date : 2022-03-28 DOI: 10.52168/bjf.2021.33.20

Md Akhtar Hossain, S. Nabi, M. M. Alam, Md. Harun Ur Rashid, MD. ANWAR HOSSAIN, Md. Abu Sikendar

引用次数: 2

First record of the family Plesiopidae in the Bay of Bengal, Bangladesh coast 在孟加拉海岸的孟加拉湾首次发现蛇鳃鱼科

Bangladesh Journal of Fisheries Pub Date : 2022-03-28 DOI: 10.52168/bjf.2021.33.42

MD. Rasel Mia, M. J. Islam

引用次数: 0

Optimization of stocking density of Gulsha (Mystus cavasius) in circular shaped net cages in pond conditions 池塘条件下圆形网箱放养古沙鱼密度优化

Bangladesh Journal of Fisheries Pub Date : 2022-03-28 DOI: 10.52168/bjf.2021.33.21

M. Mithun, Md. jahangir Alam, I. Rashid, M. A. Salam

{"title":"Optimization of stocking density of Gulsha (Mystus cavasius) in circular shaped net cages in pond conditions","authors":"M. Mithun, Md. jahangir Alam, I. Rashid, M. A. Salam","doi":"10.52168/bjf.2021.33.21","DOIUrl":"https://doi.org/10.52168/bjf.2021.33.21","url":null,"abstract":"Influence of stocking density on growth and production of Mystus cavasius (local name: gulsha) in circular shaped cages was studied in earthen pond conditions for a period of 90 days. The cages were uniform in size of 1.80 m3 and were stocked with gulsha fry at the rate of (i) 200 fry/ m3 (T1), ii) 300 fry/ m3 (T2), and (iii) 400 fry/ m3 (T3). No significant differences were observed among the treatments in weight gain {11.46±0.16g (T1); 11.40±0.14g (T2); 11.48±0.04g (T3)}, SGR {2.77±0.06 (T1); 2.70±0.10 (T2); 2.71±0.09 (T3) day-1}, and survival rates {87.3±6.6 (T1); 85.7±4.7 (T2); 84.9±5.4 (T3) %}. A significantly higher (p<0.05) gross production of 4.29±0.32 kg/ m3 in 90 days was obtained in T3 (400 fry/ m3) treatment compared to T2 and T1. The coefficient of determination values (r2) of length-weight relationship (LWR) was 0.95, 0.94, and 0.94 in T1, T2, and T3 treatments, respectively indicating a good linear regression between length and weight. The results demonstrate that the cage culture of gulsha in pond condition is possible where 400 fry/ m3 stocking density in circular shaped cages may be suitable for higher growth, survival and production.","PeriodicalId":213044,"journal":{"name":"Bangladesh Journal of Fisheries","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127937354","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Economics of freshwater Mud Eel fattening (Monopterus cuchia) in polyculture system: a case study from Nilphamari, Bangladesh 混养系统中淡水泥鳗(cuchia Monopterus)育肥的经济学:以孟加拉国Nilphamari为例

Bangladesh Journal of Fisheries Pub Date : 2022-03-28 DOI: 10.52168/bjf.2021.33.24

Z. Ferdoushi, S. Mariya, M. R. Hasan

{"title":"Economics of freshwater Mud Eel fattening (Monopterus cuchia) in polyculture system: a case study from Nilphamari, Bangladesh","authors":"Z. Ferdoushi, S. Mariya, M. R. Hasan","doi":"10.52168/bjf.2021.33.24","DOIUrl":"https://doi.org/10.52168/bjf.2021.33.24","url":null,"abstract":"The present study was carried out to analyze the cost and returns as well as to determine the effect of variable inputs on outputs of Monopterus cuchia fattening in polyculture systems. A total of 60 Cuchia farmers were selected from Saidpur upazila in the Nilphamari District. Data were collected through face-to-face interviews from September 2018-April 2019. Average stocking density (no/acre) for M. cuchia, Heteropneustes fossilis, Clarias batrachus and Oreochromis niloticus were 2288±228, 2066±144, 1883±197 and 4842±715, respectively. The average production of Cuchia, shing, magur and tilapia were 979.17±128.65, 368.33±66.36, 330±51.42 and 1027.5±118.76 kg per acre, respectively. The total variable cost was BDT 191,225.9±96565.7 per acre whereas total fixed cost was BDT 85,731.45±6276.64 per acre. In the total variable cost, percentages of labor, feed, fertilization, liming, stocking and other cost were 12.01%, 36.01%, 0.38%, 1.47%, 14.55% and 6.59%, respectively. This study also revealed that per acre gross revenue and net return were BDT 452,025.58±35829 and 173,907.72±24560 respectively. The benefit cost ratio (BCR) value in Cuchia polyculture farming was 1.65. Based on the Cobb-Douglas production function model, fingerling cost and feed cost were significant of Cuchia fattening in polyculture system. The production function analysis also reveals positive effects of different variable costs indicating enough scope to increase production and income from Cuchia fattening in polyculture system with a reduction in production costs and increased market price \u0000 ","PeriodicalId":213044,"journal":{"name":"Bangladesh Journal of Fisheries","volume":"142 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121348093","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Biometric indices of near threatened reba carp, Cirrhinus reba from an oxbow lake in southwestern Bangladesh 孟加拉国西南部牛轭湖中濒临灭绝的热巴鲤鱼的生物特征指数

Bangladesh Journal of Fisheries Pub Date : 2022-03-28 DOI: 10.52168/bjf.2021.33.22

Sk Injamamul Islam, M. Sarower-E-Mahfuj, I. Hoshan, M. Asadujjaman, M. Samad, Y. Hossain

{"title":"Biometric indices of near threatened reba carp, Cirrhinus reba from an oxbow lake in southwestern Bangladesh","authors":"Sk Injamamul Islam, M. Sarower-E-Mahfuj, I. Hoshan, M. Asadujjaman, M. Samad, Y. Hossain","doi":"10.52168/bjf.2021.33.22","DOIUrl":"https://doi.org/10.52168/bjf.2021.33.22","url":null,"abstract":"Cirrhinus reba, is a freshwater fish species which is distributed throughout the South Asian countries. The current study reports the detailed biometric indices of C. reba in the Bergobindapur oxbow lake (Baor) located in southwestern Bangladesh. The parameters assessed included length-frequency distributions (LFD), length-weight relationships (LWR), form factor (a3.0) and length at first sexual maturity (Lm) and four types of condition indices (i.e. allometric, KA; Fulton, KF; Relative, KR and Relative weight, WR).Conventional fishing equipment such as cast nets and monofilament fixed gill nets were used to collect samples from July to August 2019. Digital slide calipers were used to assess total length (TL), standard length (SL), fork length (FL), and trunk length (TrL), and body weight (BW) was quantified with an electronic balance with 0.01 g precision. Total 157 specimens with lengths ranging from 12.24 to 24.82 cm and weights ranging from 22.00 to 100.27 g were studied. The computed ‘b’ demonstrated negative allometric growth (< 3.00) in pooled sexes for the LWR. In this investigation, the mean of WR (100.36) did not differ significantly demonstrating that the environment was still in good shape. Furthermore, the size of C. reba at sexual maturity was estimated as 14.40 cm TL. The findings of this study would be worthwhile for the sustainable management of reba carp fisheries.","PeriodicalId":213044,"journal":{"name":"Bangladesh Journal of Fisheries","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129613824","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Insights into the fish biodiversity and fishing practices in Shanir Haor of Bangladesh 深入了解孟加拉国Shanir Haor的鱼类生物多样性和捕鱼方式

Bangladesh Journal of Fisheries Pub Date : 2022-03-28 DOI: 10.52168/bjf.2021.33.36

Niloy Kumar Chowdhury, M. Islam, M. Kunda, M. Das, Iftekhar Ahmed Fagun

引用次数: 0

Socio-economic conditions of fishermen in Kanaighat Upazila of Sylhet, Bangladesh 孟加拉国锡尔赫特Kanaighat Upazila渔民的社会经济状况

Bangladesh Journal of Fisheries Pub Date : 2022-03-28 DOI: 10.52168/bjf.2021.33.38

Tohir Hussain, M. Islam, Iftekhar Ahmed Fagun

{"title":"Socio-economic conditions of fishermen in Kanaighat Upazila of Sylhet, Bangladesh","authors":"Tohir Hussain, M. Islam, Iftekhar Ahmed Fagun","doi":"10.52168/bjf.2021.33.38","DOIUrl":"https://doi.org/10.52168/bjf.2021.33.38","url":null,"abstract":"The present study was undertaken to portray the socioeconomic conditions of fishermen in Kanaighat upazilla, Sylhet. A well-structured questionnaire was used to gather data from a total of 50 randomly chosen fishermen. About 55% of fishermen worked exclusively in the fishing activities, while 30% worked in agriculture and 15% worked as day laborers. The fishermen' highest yearly income ranged from BDT 25,000 to 40,000, while their lowest annual income ranged from BDT 5000 to 10,000. About % of fisherman had no education, 32% could only sign, % had primary education (up to 5 classes), and just 3 % had both S.S.C. and H.S.C. Almost all fishermen had sanitary facilities, with 67.5 % having kaccha and 32.5 % having semi-concrete. Approximately 100 % of the fishermen utilized tube well water, with 65 % having their own tube-well and the remainder using a neighbor's tube-well. The government did not give Vulnerable Group Feeding (VGD) cards in the study area. The main obstacles were discovered to be a lack of scientific information, illiteracy, and a lack of governmental assistance. Mohajan provides most of them with fishing equipment such as a boat, a net, and credit. Fishermen employed a variety of nets, including Ber jal (seine net), Current jal (gill net), Jhaki jal (cast net), and Thela jal (Push net). The Surma River was the primary source of fishing. They also caught fish from the Andu, Rouwa, and Atghaiya beels. Fishers in the study region had no other choices for earning a living outside fishing in the area.","PeriodicalId":213044,"journal":{"name":"Bangladesh Journal of Fisheries","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130848579","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of microalgae inoculated diet on growth performance and blood parameters of Nile tilapia (Oreochromis niloticus) 微藻接种饲料对尼罗罗非鱼生长性能和血液指标的影响

Bangladesh Journal of Fisheries Pub Date : 2022-03-28 DOI: 10.52168/bjf.2021.33.27

Kafia Islam Amira, Mohammad Redwanur Rahman, H. Khatoon, Suchandan Sikder, S. Islam, Jinat Afruj, Foujia Jamal, Mohammad Ekramul Haque

{"title":"Effects of microalgae inoculated diet on growth performance and blood parameters of Nile tilapia (Oreochromis niloticus)","authors":"Kafia Islam Amira, Mohammad Redwanur Rahman, H. Khatoon, Suchandan Sikder, S. Islam, Jinat Afruj, Foujia Jamal, Mohammad Ekramul Haque","doi":"10.52168/bjf.2021.33.27","DOIUrl":"https://doi.org/10.52168/bjf.2021.33.27","url":null,"abstract":"This study was intended to evaluate growth performance, physicochemical and blood parameters of Oreochromis niloticus for comparing the effects of five test diets, prepared by replacing fish meal by 25%, 50% with microalgae Tetraselmis sp. and Nannochloropsis sp. with feed without replacement. Two hundred seventy Nile tilapia (mean individual weight 0.023±0.0001 g) were randomly allocated into five treatments in triplicate. The fry was raised in 15 rectangular glass aquarium (18 fish/tank within 18 L water) encompassing water holding capacity up to 30L (each). The results revealed that both the supplemented microalgae alone could not significantly enhance the growth performance in compare to control diet (p>0.05). Low palatability and antinutritional factors may be responsible for the poor growth performance. However, significantly higher survival, better TAN, NO2-N and SRP was noticed in T25 than control (p<0.05). The blood parameters exhibited significant increase of certain parameters within reference range, nevertheless significant decrease in some blood parameters was also noticed (p<0.05). Considering the beneficial impacts on water quality, survivality and blood parameters inclusion of microalgae in fish diet can be a better option for fish cultivation.","PeriodicalId":213044,"journal":{"name":"Bangladesh Journal of Fisheries","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130927669","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of skip-feeding and re-feeding regimes on compensatory growth, body composition, feed utilization, feeding cost and survival of monosex tilapia (Oreochromis niloticus) in pond aquaculture system 跳投和复投对池塘养殖系统中单性罗非鱼代偿生长、体组成、饲料利用、饲养成本和成活率的影响

Bangladesh Journal of Fisheries Pub Date : 2022-03-28 DOI: 10.52168/bjf.2021.33.25

M. Islam, Md. Zulfikar Ali, A. Hasanuzzaman, Md. Rony Golder

{"title":"Effect of skip-feeding and re-feeding regimes on compensatory growth, body composition, feed utilization, feeding cost and survival of monosex tilapia (Oreochromis niloticus) in pond aquaculture system","authors":"M. Islam, Md. Zulfikar Ali, A. Hasanuzzaman, Md. Rony Golder","doi":"10.52168/bjf.2021.33.25","DOIUrl":"https://doi.org/10.52168/bjf.2021.33.25","url":null,"abstract":"Monosex tilapia has great acceptability particularly among the lower income people due to its lower price. However, due to increased feed price the price of tilapia has been increased in recent years. Compensatory growth (CG) of fish that is achieved after a period of feed deprivation can potentially reduce the feed cost. The present study aimed to get CG in tilapia farming so as to reduce the production cost of this popular fish. Tilapia fry of 0.54 g body weight were nursed in hapa for one month and then stocked in earthen ponds where two different restricted feeding regimes were imposed for next two months followed by one month feeding at satiation level. Sampling was done fortnightly to record average weight gain in control and treatment groups. Average individual weight in restricted feeding group (T1) reached to 170.11±4.6 g in a three months experimental period and it did not significantly (p>0.05) differ with the weight gained in control group (182.79±5.32 g) where fish were fed on regular basis. The specific growth rate (SGR) also showed no significant difference (p>0.05) between T1 (SGR 2.66±0.011 % day-1) and control group (SGR 2.69±0.012 % day-1). Feed Conversion Ratio (FCR) in T1 (1.26) was found significantly (p<0.05) lower to that of control group (1.47), hence the per unit production cost was also found significantly lower in T1 (BDT 75 Kg-1) compared to that of control (BDT 88.23 Kg-1). On the other hand no significant difference was evident in biochemical parameters between the control and restricted feeding groups. Thus, this study suggests skip feeding as an appropriate tool to achieving CG in monosex tilapia and to trim down the production cost as well. \u0000 ","PeriodicalId":213044,"journal":{"name":"Bangladesh Journal of Fisheries","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116894962","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0