Lakes and Reservoirs: Research and Management最新文献

{"title":"Some biological aspects of the Silurid Catfish, Bagrus docmak (Forksskal, 1775) in Lake Victoria, Kenya","authors":"Edwine Yongo,&nbsp;Simon Agembe","doi":"10.1111/lre.12371","DOIUrl":"https://doi.org/10.1111/lre.12371","url":null,"abstract":"<p><i>Bagrus docmak</i> is indigenous to Lake Victoria, being an important source of economic livelihoods to communities around the lake. Although its stocks in the lake are facing intense fishing, predation and ecological changes, data on its biological aspects are scanty, being the basis for the current study. Fish samples for the present study were collected using gillnets of 10- and 50-mm mesh sizes. The length and weight of individual fish caught were measured in the field, while stomachs were preserved in 5% formalin and taken to the laboratory for gut content analysis. The overall sex ratio (male: female) was 1.0:1.26, and did not deviate significantly from 1:1. The lengths of the fish ranged from 12.0 to 55.0 cm TL and the weights ranged between 20.0 and 1650.0 g, with a mean length and weight of 32.7 cm TL and 351.2 g, respectively. The fish were in a good condition with mean condition factors (K) of 1.0, 1.01 and 0.97 for all fish, females and males, respectively. The fish exhibited a negative allometric growth pattern, with a length–weight relationship slope (<i>b</i>) of 2.90, 2.94 and 2.94 for all fish, females, and males, respectively. Stomach analyses revealed an ontogenetic diet shift, where juveniles of less than 30 cm TL feeding exclusively on <i>Caridina nilotica</i>. With increasing size, the fish ingested insects and other fish species, including barbus, bivalves, haplochromines, crabs and detritus in variable quantities. The results of the present study provide useful information on the biological aspects of <i>B</i>. <i>docmak</i> useful for its management and comprehensive stock assessment when required. It also provides insights into the feeding ecology of this fish in view of the changing Lake Victoria ecosystem. Accurate Knowledge regarding its food requirements can inform feed formulation for its successful culture.</p>","PeriodicalId":39473,"journal":{"name":"Lakes and Reservoirs: Research and Management","volume":"26 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1111/lre.12371","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91792479","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}

{"title":"Twoblotch ponyfish Nuchequula blochii (Valenciennes, 1835) in the Sundarban Reserve Forest habitat of Bangladesh: Second record and establishment probability","authors":"Md. Abu Hanif,&nbsp;Shaharior Hossen,&nbsp;Md. Rajib Sharker,&nbsp;Muhammad A. B. Siddik","doi":"10.1111/lre.12368","DOIUrl":"https://doi.org/10.1111/lre.12368","url":null,"abstract":"<p>Climate changes and anthropogenic activities have paved the way for the dislocation of native species into areas located far away from their natural habitats. To this end, the Bay of Bengal and its adjacent coast have experienced the invasion of many alien species coming from different oceans, seas and bays around the world. Recently, a single specimen of the Twoblotch ponyfish (<i>Nuchequula blochii</i>) was captured. It had a total length of 69 mm and bodyweight 0.98 g. The specimen was caught at a depth of 18 m in the world's largest mangrove habitat, Sundarban, with a soft sandy bottom. Because the species <i>N</i>. <i>blochii</i> was previously recorded for the first time in the water area of Bangladesh, the single captured species above was considered as the ‘second record.’ There are several potential factors responsible for the introduction of this species in the Bay of the Bengal coast, one being the similar habitat conditions available to them. Because this species was previously reported from the water area of Bangladesh and is still appearing now, there is a possibility that it may become established in the water area of Bangladesh.</p>","PeriodicalId":39473,"journal":{"name":"Lakes and Reservoirs: Research and Management","volume":"26 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1111/lre.12368","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91787585","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}

{"title":"Population dynamics of Indian river shad Gudusia chapra (Hamilton, 1822) using length frequency analysis for fisheries management in a floodplain wetland of Ganga River Basin, India","authors":"Uttam Kumar Sarkar,&nbsp;Canciyal Johnson,&nbsp;Suman Kumari,&nbsp;Snigdha Bakshi,&nbsp;Gunjan Karnatak,&nbsp;Bandana Das Ghosh,&nbsp;Mishal P. Lianthuamluaia,&nbsp;Basanta Kumar Das","doi":"10.1111/lre.12365","DOIUrl":"https://doi.org/10.1111/lre.12365","url":null,"abstract":"<p>The small-scale fisheries sector plays very significant role in Indian fisheries. Fish life history parameters such as growth and morality are considered important factors for their conservation and management. Accordingly, the population parameters of a commercially important freshwater clupeid fish, <i>Gudusia chapra</i> (Hamilton, 1822) of Mathura <i>beel</i>, a tropical oxbow lake in West Bengal were investigated on the basis of primary data using a FiSAT-II software package. A total of 2062 specimens of both sexes combined, exhibiting a length (TL) range 1.7–15.4 cm and a weight range of 1.14–35.69 g, were collected from different sites of the wetland during October 2017–September 2019. The growth parameters <i>L</i>_∞, <i>K</i> and <i>t</i>₀ of the species were 16.55 cm, 1.10/year and −0.02, respectively. The growth performance (<i>ϕ</i>) was 2.48. The estimated mortality rates <i>Z</i>, <i>M</i> and <i>F</i> were 2.72, 1.25 and 1.47/year, respectively. The current exploitation ratio (<i>E</i>) was estimated to be 0.54 based on the length-converted catch curve. Analysis of the relative yield per recruit and relative biomass per recruit model indicated that the current <i>E</i> value is approaching an <i>E</i>_max value of 0.56. The maximum sustainable yield of this species was estimated to be 10.7 t, compared to the present annual yield of 11.5 t. For optimal fisheries management and a reduced risk of over exploitation, the current exploitation rate should be reduced by about 40% to achieve <i>E</i>_0.5 as a target reference point. The information generated in the present study will facilitate optimal management of the resources for sustainable fisheries management and conservation of <i>G</i>. <i>chapra</i>.</p>","PeriodicalId":39473,"journal":{"name":"Lakes and Reservoirs: Research and Management","volume":"26 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1111/lre.12365","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91847389","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}

{"title":"Optimal hydropower generation of Maithon multi-purpose reservoir system","authors":"Priti Sagar,&nbsp;Prabeer Kumar Parhi,&nbsp;Birendra Bharti","doi":"10.1111/lre.12364","DOIUrl":"https://doi.org/10.1111/lre.12364","url":null,"abstract":"<p>The present study focuses on optimizing the hydropower generation capacity of a multi-purpose reservoir system considering various constraints, including reservoir water mass balance, minimization of sediment, maximum and minimum reservoir water storage, maximum and minimum reservoir water releases, reservoir water drawdown levels, reservoir overflows, maximum flood zone space, and maximum and minimum storage constraints under 50%, 70% and 90% dependable inflow conditions The focus is the Maithon multi-purpose reservoir system located at Maithon, a distance of 40.2 km from Dhanbad, the coal capital of India, in the State of Jharkhand. The study results indicate the derived policy is capable of producing maximum annual hydropower of 146,519.48 MWh/year for a 50% dependable inflow condition, 105,512.02 MWh/year for a 70% dependable inflow condition and 58,924.38 MWh/year for a 90% dependable inflow condition, compared to the existing hydropower generation of 129,428.4 MWh/year (average of last 10 years). A trade-off between reservoir release water releases, mostly for meeting irrigation water needs and maximizing energy generation, was determined for use by various stakeholders and managers of reservoir operations.</p>","PeriodicalId":39473,"journal":{"name":"Lakes and Reservoirs: Research and Management","volume":"26 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91825639","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}

{"title":"Is siltation affecting the limnology and gradually eroding the functions of Agba reservoir, Ilorin, Nigeria?—An old tropical African drinking water reservoir","authors":"Moshood Keke Mustapha,&nbsp;Ibukunoluwa Adesola Abodunrin","doi":"10.1111/lre.12366","DOIUrl":"https://doi.org/10.1111/lre.12366","url":null,"abstract":"<p>Siltation changes the limnological properties of water and is the most challenging of all reservoir problems. It impairs water quality, quantity and fauna assemblages, thereby eroding the functions of a reservoir. Siltation in Agba reservoir, Ilorin, Nigeria, was assessed using various physicochemical and biotic parameters. There was significant reduction (<i>p</i> &lt; .05) in depth compared with original depth of the reservoir. Transparency was low, and turbidity was high especially during the rainy season; pH was slightly alkaline and water hardness is soft. Alkalinity ranged between 88 and 90 mg/L, nitrate and nitrite were low, and sulphate was high. Dissolved oxygen (DO) and biological oxygen demand (BOD) varied between 4.73–5.08 mg/L and 2.25–2.40 mg/L, while electrical conductivity and total dissolved solids ranged between 62.19and 62.72 µS/cm and 41.68 and 42.02 mg/L, respectively. Significant (<i>p</i> &lt; .05) negative correlations were recorded between turbidity and transparency, turbidity and DO, while significant (<i>p</i> &lt; .05) positive correlations were found between turbidity and BOD, turbidity and sulphate. Phytoplankton, zooplankton and fish assemblages were few with only 12 genera of phytoplankton, 10 genera of zooplankton and six species of fish recorded. Siltation of the reservoir was due to anthropogenic activities in the watershed, which gave rise to high turbidity, low transparency, reduction in depth and storage capacity. Low species assemblages of phytoplankton, zooplankton and fish were due to siltation in the reservoir. Siltation is gradually eroding the aesthetic value, tourism, drinking and fisheries functions of the reservoir and in a few years, if not controlled, the reservoir could be turned into a marsh. Siltation in the reservoir can be controlled through watershed management by soil erosion control, stopping anthropogenic activities which bring in sediments, bypassing the reservoir to create sediment basin or dike, sluicing, dredging, flushing, excavation and hydrosuction. If all these management fail, it will be appropriate to decommission the reservoir.</p>","PeriodicalId":39473,"journal":{"name":"Lakes and Reservoirs: Research and Management","volume":"26 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91825641","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}

{"title":"Evaluating the fishery of tropical reservoirs using surplus production models: A case study of Aliyar Reservoir, Tamil Nadu, India","authors":"Vaidhyanathan Geethalakshmi,&nbsp;V. Chandrasekar,&nbsp;Chinnadurai Shanmugavel,&nbsp;Femeena Hassan,&nbsp;Nikita Gopal","doi":"10.1111/lre.12363","DOIUrl":"https://doi.org/10.1111/lre.12363","url":null,"abstract":"<p>Reservoir fisheries support the livelihood needs of socio-economically deprived fishers and ensure the nutritional security of rural populations. To sustain community food safety and economic needs, a basic understanding of the prevailing biological and economic conditions, as well as a comprehensive evaluation of the fishery is essential. To this end, the present study focused on evaluating the fisheries of the small Aliyar Reservoir located in the Coimbatore District of the state of Tamil Nadu, India, utilizing surplus production models. The maximum recorded fish catch was 51.3 MT in 2015, with the minimum catch of 10.89 MT obtained in 1991, and the average production during 1985 to 2018 being 30.80 MT from the reservoir. The peak catch season was during the months of February to May. The MSY (Maximum Sustainable Yield) and other key fish population parameters, including the carrying capacity (<i>K</i>), catchability coefficient (<i>q</i>), intrinsic population growth rate (<i>r</i>) and coefficient of variation (CV), using catch and effort data (CEDA) analysis and ASPIC (a surplus production model incorporating covariates) computer software packages. Using CEDA software, the estimated MSY was 36.92 MT (CV = 0.47) using the Fox model and 36.68 MT (CV = 0.307) using the Schaefer model. An integrated surplus production model (CYP) of Clarke et al. (<i>Marine Research Economics</i>, 1992, 7, 115) was also fitted to the data and found to be the best fit with the MSY, an estimated optimum effort of 51.20 MT and 5110 nets/year. The results indicated the need for increasing the fishing effort with appropriate standard gears for exploiting the fish stock. Further economic optimization with the CYP model indicates increasing the fishing effort by 34% will lead to a 40% increase in the annual profits for the fishermen.</p>","PeriodicalId":39473,"journal":{"name":"Lakes and Reservoirs: Research and Management","volume":"26 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91843824","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}

{"title":"A GIS-based approach for delineating suitable areas for cage fish culture in a lake","authors":"Christopher Mulanda Aura,&nbsp;Safina Musa,&nbsp;Chrisphine S. Nyamweya,&nbsp;Zachary Ogari,&nbsp;James M. Njiru,&nbsp;Stuart E. Hamilton,&nbsp;Linda May","doi":"10.1111/lre.12357","DOIUrl":"https://doi.org/10.1111/lre.12357","url":null,"abstract":"<p>We present a GIS-based approach to the delineation of areas that have different levels of suitability for use as tilapia cage culture sites the Kenyan part of Lake Victoria, Africa. The study area was 4,100 km². The method uses high-resolution bathymetric data, newly collected water quality data from all major fishing grounds and cage culture sites, and existing spatial information from previous studies. The parameters considered are water depth, water temperature, levels of dissolved oxygen, chlorophyll-<i>a</i> concentrations, distances to the lake shoreline and proximity to other constraints on cage culture development. The results indicated that the area most suitable for fish cages comprised about 362 km², or approximately 9% of the total area; the remaining 91% (i.e., 3,737 km²) was found to be unsuitable for tilapia cage culture. We conclude that the successful implementation of this approach would need stakeholder involvement in the validation and approval of potential sites, and in the incorporation of lake zoning into spatial planning policy and the regulations that support sustainable use while minimising resource use conflicts. The results of this study have broader applicability to the whole of Lake Victoria, other African Great Lakes, and any lakes in the world where tilapia cage culture already occurs or may occur in the future.</p>","PeriodicalId":39473,"journal":{"name":"Lakes and Reservoirs: Research and Management","volume":"26 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91830025","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}

{"title":"Seasonal water-level fluctuations and changes in macro-benthic community structure in tropical reservoirs: A Sri Lankan case study","authors":"Sampath N. Weerakoon,&nbsp;W. Upali Chandrasekara,&nbsp;Upali S. Amarasinghe","doi":"10.1111/lre.12358","DOIUrl":"https://doi.org/10.1111/lre.12358","url":null,"abstract":"<p>Seasonal water-level fluctuations (WLFs) in reservoirs influence ecological processes, in turn affecting their benthic macroinvertebrate communities. The present study was carried out in 10 irrigation reservoirs of Sri Lanka to investigate the effects of seasonal WLFs on the benthic macroinvertebrate fauna. The study period was divided into two distinct phases: the drained period and the inundated period. Benthic macroinvertebrates were sampled during both periods and enumerated. Air temperature and soil quality parameters were also measured simultaneously, and hydrological data related to the Kala Oya River basin were obtained from irrigation authorities. Data analysis using non-metric multi-dimensional scaling revealed two distinct reservoir groups, namely, Hydrological Stress Group 1 (HSG1) and Hydrological Stress Group 2 (HSG2). A low hydrological residence time and low relative reservoir level fluctuations (RRLF) characterized HSG1, with the opposite describing HSG2. Temporal variations of macrobenthos indicated a high taxa richness and diversity in HSG1 reservoirs during the drained period, with scrapers and collector-gatherers being the dominant functional feeding groups. Reservoirs in the lower river basin (HSG1) exhibited a high taxa richness and diversity. During the inundated periods, insect taxa colonized, particularly, chironomids and ephemeropterans. Molluscan taxa were prominent during the drained periods. These observations highlight the influence of seasonal fluctuations of reservoir water levels on benthic macroinvertebrates. Benthic macroinvertebrate communities in reservoirs were significantly influenced by the RRLF, manifesting the importance of hydrological regimes in reservoirs to develop macroinvertebrate metrics for water-quality monitoring.</p>","PeriodicalId":39473,"journal":{"name":"Lakes and Reservoirs: Research and Management","volume":"26 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91850605","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}

{"title":"A review of the importance, gaps and future directions of Integrated Lake Basin Management Planning in Malaysia","authors":"Zati Sharip,&nbsp;Salmah Zakaria,&nbsp;Md Nasir Md Noh,&nbsp;Masahisa Nakamura,&nbsp;Victor Muhandiki","doi":"10.1111/lre.12355","DOIUrl":"https://doi.org/10.1111/lre.12355","url":null,"abstract":"<div>\u0000 \u0000 <p>The present study assessed the importance of basin management plans for managing lakes in Malaysia within the context of Integrated Lake Basin Management (ILBM) governance principles. Although ILBM has been promoted since 2007, less than 2% of the lakes in the country have basin management plan in place. Most of these management plans need to be fully adopted, reviewed and evolved as living documents by all relevant stakeholders for successful lake basin management. Increasing demands for resources and development within catchments, as well as emerging threats, require integrated management of lake resources for sustainable use, highlighting the need to develop basin management plans for all other lakes to support their effective management. The present study also provides a narrative for developing an ILBM plan, including consideration of lake characteristics, the linked lentic–lotic water systems comprising lake basins, ecosystem services, participatory planning and for performing continuous lake governance improvements within a cyclical process. Management planning for lakes should address specific focus areas or major threats, continuing the process until all its relevant governance pillars are strengthened. These ILBM plans can eventually be integrated to the larger river basin management and state water resources management planning towards effective water governance.</p>\u0000 </div>","PeriodicalId":39473,"journal":{"name":"Lakes and Reservoirs: Research and Management","volume":"26 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91815605","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}

{"title":"Life-history traits of three Ambassid fishes (Chanda nama, Parambassis lala and Parambassis ranga) from the Mathabhanga River, southwestern Bangladesh","authors":"Md. Yeamin Hossain,&nbsp;Md. Alomgir Hossen,&nbsp;Zannatul Mawa,&nbsp;Md. Ataur Rahman,&nbsp;Md. Rabiul Hasan,&nbsp;Md. Akhtarul Islam,&nbsp;Dalia Khatun,&nbsp;Md. Ashekur Rahman,&nbsp;Sumaya Tanjin,&nbsp;Most. Shakila Sarmin,&nbsp;Md. Abul Bashar,&nbsp;Jun Ohtomi","doi":"10.1111/lre.12354","DOIUrl":"10.1111/lre.12354","url":null,"abstract":"<div>\u0000 \u0000 <p>The present study provides the first indication of the life-history traits, including, population structure, growth pattern, condition factor, form factor (<i>a</i>_3.0), size at first sexual maturity (<i>L_m</i>), natural mortality (<i>M_W</i>) and optimum catchable length (<i>L_opt</i>), of three Ambassid (<i>Chanda nama</i>, <i>Parambassis lala</i> and <i>Parambassis ranga</i>) fishes from the Mathabhanga River in southwest Bangladesh. A total of 370 individuals were occasionally collected from August 2017 to July 2018 with cast nets, gill nets, square lift nets, and conical- and box-traps. The total length (TL) ranged from 2.4 to 7.5 cm for <i>C. nama</i>, 1.9–3.8 cm for <i>P. lala</i> and 1.8–6.5 cm for <i>P. ranga</i>. The length-frequency distributions (LFDs) showed the 4.0–5.0 cm TL size group for <i>C. nama</i> and the 3.0–4.0 cm TL size group were numerically dominant for <i>P. lala</i> and <i>P. ranga</i>. The length–weight relationships (LWRs) indicated isometric growth for <i>C. nama</i>, and positive allometric growth for <i>P. lala</i> and <i>P. ranga</i>. All the LWR values were very significant (<i>p</i> &lt; .001), with all <i>r</i>² values &gt; .950. Based on the Spearman rank correlation test, body weight (BW) versus Fulton's-condition factor (<i>K_F</i>) was extremely correlated (<i>p</i> &lt; .001), indicating a better wellbeing for these species. The <i>a</i>_3.0 value was 0.0082, 0.0138 and 0.0104 for <i>C. nama</i>, <i>P. lala</i> and <i>P. ranga</i>, respectively. Based on the maximum length (<i>L_max</i>), the <i>L_m</i> was 4.4 cm TL for <i>C. nama</i>, 2.5 cm TL for <i>P. lala</i>, and 4.0 cm TL for <i>P. ranga</i>. Based on the asymptotic length (<i>L_∞</i>), the <i>L_m</i> was 4.88 cm TL for <i>C. nama</i>, 2.63 cm TL for <i>P. lala</i>, and 4.28 cm TL for <i>P. ranga</i>. The <i>M_W</i> value was 2.2, 3.3 and 2.7/year for <i>C. nama</i>, <i>P. lala</i> and <i>P. ranga</i>, respectively. The optimum catchable length (<i>L_opt</i>) was 5.36 cm TL for <i>C. nama,</i> 2.75 cm TL for <i>P. lala</i> and 4.65 cm TL for <i>P. ranga</i>. The findings of the present study should be very useful for effective and sustainable management of these fishes in the Mathabhanga River and the connecting ecosystems.</p>\u0000 </div>","PeriodicalId":39473,"journal":{"name":"Lakes and Reservoirs: Research and Management","volume":"26 1","pages":"59-69"},"PeriodicalIF":0.0,"publicationDate":"2021-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130062283","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}