Lakes and Reservoirs: Research and Management最新文献

{"title":"Life-history traits of Guntea loach, Lepidocephalichthys guntea (Hamilton, 1822) in the Payra River, southern Bangladesh","authors":"Newton Saha,&nbsp;Prosun Roy,&nbsp;Zubyda Mushtari Nadia,&nbsp;SM Majharul Islam,&nbsp;Md. Yeamin Hossain","doi":"10.1111/lre.12378","DOIUrl":"https://doi.org/10.1111/lre.12378","url":null,"abstract":"<p>The present study provides the first wide-ranging elucidation of life-history traits, including length–frequency distribution (<i>LFD</i>), length–weight and length–length relationship (<i>LWR</i> and <i>LLR</i>), form factor (<i>a</i>_<i>3.0</i>), best condition factor (allometric, <i>K</i><i>_A</i>; Fulton, <i>K</i><i>_F</i>; relative, <i>K</i><i>_R</i>; and relative weight, <i>W</i><i>_R</i>), length at first maturity (<i>L</i><i>_m</i>), natural mortality (<i>M</i><i>_w</i>) and optimum catchable length (<i>L</i><i>_opt</i>) of <i>Lepidocephalichthyes guntea</i> from the Payra River in southern Bangladesh. A total of 470 fishes were randomly collected seasonally from February 2019 to January 2020, using several traditional fishing gears (cast nets; drag nets; lift nets; and gill nets). The total length (TL), standard length (SL) and total body weight (BW) of each individual fish were measured with a 0.01 cm and 0.01 g precision, respectively. The TL size classes of 6.00–6.99 cm and 7.00–7.99 cm TL were the numerically dominant groups among the total fish population. Exponential <i>b</i> values of <i>LWR</i> (TL vs. BW) indicate a positive allometric growth (<i>b</i> = 3.20) pattern in the Payra River. The <i>b</i> value of <i>LLR</i> also indicates the same growth pattern. The estimated <i>a</i>_3.0 value was 0.007, indicating the fish has an elongated body profile. Among the four types of condition factors, <i>K</i>_F is the best-suited tool for evaluating the well-being of <i>L</i>. <i>guntea</i> in the Payra River. Additionally, <i>W</i>_R exhibited very significant divergence from 100 (<i>p</i> &lt; .0001), designating an imbalanced habitat for <i>L</i>. <i>guntea</i>. The calculated <i>L</i>_m, <i>M</i>_w and <i>L</i>_opt values were 6.54 (~6.5 cm) in TL, 1.16/year and 7.46 cm TL for <i>L</i>. <i>guntea</i> in the Payra River, respectively. Thus, the results of the present study could be used in the future for improved management of this species in Payra River, as well as for linking ecosystems.</p>","PeriodicalId":39473,"journal":{"name":"Lakes and Reservoirs: Research and Management","volume":"26 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1111/lre.12378","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91800148","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 new lake algae detection method supported by a drone-based multispectral camera","authors":"Veronika Zsófia Tóth,&nbsp;János Grósz,&nbsp;Márta Ladányi,&nbsp;András Jung","doi":"10.1111/lre.12377","DOIUrl":"https://doi.org/10.1111/lre.12377","url":null,"abstract":"<p>Algal detection and quantification are essential steps needed to maintain the appropriate ecological status of freshwater bodies. Although there are still some technical issues to be addressed, remote sensing technologies possess benefits over traditional testing methods. To overcome these difficulties, algal concentrations at selected locations in Lake Balaton, Hungary, were determined with the use of a multispectral camera, mounted by a 3D printed tool on a drone. The algae concentration was defined from three different camera output variables, including light level, irradiance and reflectance. The determination was based on blue/green and also NIR/red indices. To validate the method, results from drone measurements were compared to laboratory measurements of collected water samples from the same 29 sites at which the drone camera took images. Pearson's correlation was applied to test the agreement of the measured and method-derived values. The blue/green ratio proved to be a more adequate input than NIR/RED, with the highest correlation being produced by the light level, blue/green ratio-based data that exhibited a highly significant Pearson correlation coefficient (<i>r</i> = .96). This newly developed drone-based method was shown to provide notably better spatial resolution than the satellites. Accordingly, the newly developed, quick-process measurements obtained in the present study can be done as frequently as required with a markedly lower budget.</p>","PeriodicalId":39473,"journal":{"name":"Lakes and Reservoirs: Research and Management","volume":"26 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1111/lre.12377","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91883902","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Population structure of a newly recorded (Halodule uninervis) and native seagrass (Halophila ovalis) species from an intertidal creek ecosystem","authors":"Amrit Kumar Mishra,&nbsp;Mukunda Kesari Khadanga,&nbsp;Shesdev Patro,&nbsp;Deepak Apte,&nbsp;Syed Hilal Farooq","doi":"10.1111/lre.12376","DOIUrl":"https://doi.org/10.1111/lre.12376","url":null,"abstract":"<p>The presence of the seagrass <i>Halodule uninervis</i> was documented for the first time outside the Chilika lagoon at Haripur creek, along with previously documented <i>Halophila ovalis</i> from the same region. The population structure (density; biomass; leaf growth rate; and morphometrics) and environmental parameters was assessed for both seagrass species. The pH levels of the water column above both seagrass meadows were lower than the standard oceanic pH of 8.2, likely attributable to upstream freshwater influences. <i>Halophila ovalis</i> grew on sandy and <i>H. uninervis</i> on silty substrates. High nutrient (nitrate and phosphate) concentrations in the water column of the creek influenced the growth of macroalgae (<i>Ceramium</i> sp. and <i>Gracilaria verrucosa</i>) on the leaves of <i>H. uninervis</i>. Leaf reddening was only observed in <i>H</i>. <i>ovalis</i> leaves. Under similar environmental conditions, the shoot density and biomass (above- and below-ground) of <i>H</i>. <i>ovalis</i> were 2-fold lower that for <i>H. uninervis</i>. The leaves of <i>H. uninervis</i> were 9-fold longer than <i>H</i>. <i>ovalis</i>, whereas <i>H</i>. <i>ovalis</i> had 5-fold wider leaves than <i>H. uninervis</i>. The leaf plastochrone interval of <i>H</i>. <i>ovalis</i> (2.3 days) and <i>H. uninervis</i> (9.6 days) was similar for the Indian Ocean region. Consequently, the <i>H</i>. <i>ovalis</i> leaf growth rate was 2-fold lower than that for <i>H. uninervis</i>. <i>H</i>. <i>ovalis</i> shoot internodes were 2.6-fold longer than for <i>H. uninervis</i>, whereas the root lengths of <i>H. uninervis</i> were longer than for <i>H</i>. <i>ovalis</i>. The shorter root length of <i>H</i>. <i>ovalis</i> resulted in a higher branching frequency than for <i>H. uninervis</i>. The total C and N content were higher in the <i>H</i>. <i>ovalis</i> leaves than those of <i>H. uninervis</i>. This study suggest seagrass responses to similar environmental conditions are species-specific. Regular assessment of the seagrass population structure and water quality monitoring of Haripur creek are essential for better management and conservation of these important seascapes.</p>","PeriodicalId":39473,"journal":{"name":"Lakes and Reservoirs: Research and Management","volume":"26 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1111/lre.12376","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91865027","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":"Growth and status of Nile tilapia (Oreochromis niloticus L.) stock in Lake Chamo, Ethiopia","authors":"Million Tesfaye,&nbsp;Gashaw Tesfaye,&nbsp;Abebe Getahun","doi":"10.1111/lre.12375","DOIUrl":"https://doi.org/10.1111/lre.12375","url":null,"abstract":"<p>Global inland freshwater fisheries support livelihoods for several million people. These important resources, however, are suffering from excessive overfishing as a result of increasing fishing pressures attributable to an increased human population and subsequent demand for food and economic livelihoods. To this end, very little is known about the vital population parameters and stock status of Nile tilapia (<i>Oreochromis niloticus</i>) in Lake Chamo in Ethiopia. Thus, the present study focused on determining the Nile tilapia population parameters and assessing their stock status in Lake Chamo, using length-frequency and catch-effort data collected between February 2018 and January 2019 from commercial fish catches from 10 major fish landing sites. The TropFishR software package was used to determine von Bertalanffy growth parameters, and length-converted catch curve and empirical models were used to calculate mortality parameters. The maximum sustainable yield (MSY) and its corresponding level of effort (<i>f</i>\u0000 _MSY) were determined using the length-based Thompson &amp; Bell yield prediction model. The growth parameters <i>L</i>\u0000 _∞, <i>K</i> and Ф′ of the Nile tilapia stock were found to be 59.4-cm, 0.41/year and 3.16, respectively. The annual rate of total (<i>Z</i>), natural (<i>M</i>) and fishing mortality (<i>F</i>) were estimated to be 2.442, 0.558 and 1.884/year, respectively. The calculated current yield (711 <i>t</i>/year) is lower than the predicted values of MSY (771 <i>t</i>/year). The present level of fishing effort (2564 nets/day) is more than twice higher than the optimum level of fishing effort (1026 nets/day), clearly indicating overfishing of the Nile tilapia stock in the lake. This finding is also substantiated by the high level of exploitation rate (<i>E</i> = 0.771). Thus, a recommendation based on the results of the present study is a 60% reduction in the fishing effort (1538 nets/day), which will also provide a higher fish yield. The results of the present study also are useful facilitate development of appropriate management strategies for the Nile tilapia fishery in Lake Chamo.</p>","PeriodicalId":39473,"journal":{"name":"Lakes and Reservoirs: Research and Management","volume":"26 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1111/lre.12375","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91906527","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":"Impacts of Nile Perch (Lates niloticus) overfishing on the technical efficiency of fishers in the Tanzania portion of Lake Victoria","authors":"Eliaza Mkuna,&nbsp;Lloyd J. S. Baiyegunhi","doi":"10.1111/lre.12373","DOIUrl":"https://doi.org/10.1111/lre.12373","url":null,"abstract":"<p>The present study employed the Data Envelopment Analysis (DEA) and Propensity Score Matching (PSM) techniques to assess the impacts of Nile perch overfishing on the technical efficiency of fishers, based on a survey of 268 fishers across ten landing sites in the Tanzanian portion of Lake Victoria. The DEA results indicated overall that Nile perch fishers exhibited an average technical efficiency of 30%, indicating a high level of inefficiency. There were no statistically significant differences in the technical efficiencies within the range of 0%–10% and 21%–30% for Nile perch fishers who were overfishing and those who were not overfishing, attributed to the fisher's mobility across the lake. Further, the mode of propulsion and being a member of a fishery organization were found to be statistically significant factors influencing the inefficiency of Nile perch fishers. In addition, results from the Probit estimates of the PSM indicated that being a member of a fishery organization, the quantity of Nile perch harvested per trip, the age of a fishing vessel (boat), the gillnet mesh size and the cost of fishing inputs had statistically significant effects influencing the probability of Nile perch overfishing. However, further results indicated Nile perch overfishing did not have a statistically significant impact on the technical efficiency of fishers. Thus, it is recommended that there is a need to monitor and formalize fisher's mobility as one of the alternatives for co-management of the lake. Overfishing could be controlled without necessarily affecting the technical efficiency of Nile perch fishers through training and access to proper fishing gears.</p>","PeriodicalId":39473,"journal":{"name":"Lakes and Reservoirs: Research and Management","volume":"26 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1111/lre.12373","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91880845","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":"Effects of COVID-19 pandemic on Baor (Oxbow lake) fisheries: Decreased economic livelihoods and food security","authors":"Md. Ashekur Rahman,&nbsp;Md. Yeamin Hossain,&nbsp;Sumaya Tanjin,&nbsp;Zannatul Mawa,&nbsp;Md. Rabiul Hasan,&nbsp;Saleha Jasmine","doi":"10.1111/lre.12374","DOIUrl":"https://doi.org/10.1111/lre.12374","url":null,"abstract":"<p>The COVID-19 pandemic has had a negative impact on the global economy, with Bangladesh as a developing country exhibiting greater vulnerability. This pandemic has negatively affected the livelihoods and food security of the nation. <i>Baor</i> (oxbow lake) fisheries communities also were significantly affected during the pandemic, in terms of incomes, food security, health conditions, etc. Fishers have had to stop harvesting, or lower the quantity, of fishes, the sale of which was the main income source of the <i>baor</i> fishers’ community because of reduced consumer demands during the lockdown conditions. The supply chains of fishes and fish culture inputs were also disrupted because of a lack of needed transportation, thereby hindering the availability of this convenient protein source from the fish. All these factors negatively impacted the incomes of the people dependent on this important fishery. If appropriate measures are applied to overcome these various difficulties, the <i>baor</i> fisheries may again contribute significantly to the livelihoods and food security of the population in the southwestern part of Bangladesh.</p>","PeriodicalId":39473,"journal":{"name":"Lakes and Reservoirs: Research and Management","volume":"26 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1111/lre.12374","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91860726","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Age and growth rate estimations as a basis for assessing the population dynamics of Hydrocynus vittatus Castelnau 1861 in the Sanyati Basin of Lake Kariba, Zimbabwe","authors":"Terence Magqina,&nbsp;Tatenda Dalu,&nbsp;Lindah Mhlanga,&nbsp;Tamuka Nhiwatiwa","doi":"10.1111/lre.12372","DOIUrl":"https://doi.org/10.1111/lre.12372","url":null,"abstract":"<p>In early fish life stages, information on their age structure can be used to clarify the effects of environmental changes on their growth and survival, thereby providing an improved understanding of factors affecting their recruitment success. There is currently inadequate understanding of the age structure of <i>Hydrocynus vittatus</i> in the Sanyati Basin of Lake Kariba in Zimbabwe. Accordingly, the present study investigated the age of tigerfish in the Sanyati Basin of Lake Kariba using whole otoliths and scales for comparison. The results indicated ages read on the basis of scales and otoliths of <i>H</i>. <i>vittatus</i> agreed to a larger extent for fish aged one to four years than for fish older than four years. There was a significant difference (<i>χ</i>² = 8.520, <i>p</i> = .024) in the ages obtained from analysis of scales and otoliths for fish older than four years. The average percentage error and coefficient of variation were found to be 6.03% and 8.1% for whole otoliths, respectively, for the present study. The APE and CV values for scales were 13.81% and 17.41%, respectively. Relatie age data for whole otoliths fit the von Bertalanffy growth model, while that for scales did not fit the von Bertalanffy model, resulting in many outliers and much scatter of the data. The whole otolith parameters for the von Bertalanffy growth curve were <i>L</i>-infinity = 682.5 mm, <i>k</i> = 0.530 and <i>t</i>₀ = 3.19. Based on the results of the present study, it can be concluded in this case that whole otoliths were the best method of ageing tigerfish from Lake Kariba. Accordingly, it is recommended that otoliths be used for ageing tigerfish in Lake Kariba and that scales be used for ageing tigerfish only up to four years in age.</p>","PeriodicalId":39473,"journal":{"name":"Lakes and Reservoirs: Research and Management","volume":"26 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1111/lre.12372","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91803300","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":"Identifying potential pollution hazards to the ecological well-being of Lake Hayq and Lake Hardibo and related threats in Ethiopia: Advocating development of decision-support tools and policy options","authors":"Eskinder Zinabu","doi":"10.1111/lre.12370","DOIUrl":"https://doi.org/10.1111/lre.12370","url":null,"abstract":"<p>The present study focuses on the pollutants draining into two closely related lakes in northcentral Ethiopia and related policy issues at a national scale. Observational interviews were conducted in the catchments of the lakes, and related published scientific and policy papers were examined. The susceptibility of the lakes to degradation was investigated on the basis of a set of related attributes and associated questions. The hydrological, morphometric features, chemical and biological characteristics, land uses and socio-economic activities within the catchments of the lakes were assessed. Soil erosion, nutrients and plastic and organic wastes are identified as likely pollutants posing risks to the lake aquatic ecosystems. A better understanding of the sources, distribution and dynamics of the pollution vectors within the catchments is important in order to protect the lakes from further degradation. Based on a national perspective, the absence of monitoring and emission controls in catchments is hindering the development and application of protection measures in the lake catchments. Legal enforcement directed to controlling point source pollutants is poor, with regulation of diffuse source pollution being urgently needed to protect the lakes. Accordingly, commitment on the part of the federal, regional and local governments is clearly required to enhance assessment and enforcement capacities and to authorize regulating institutions.</p>","PeriodicalId":39473,"journal":{"name":"Lakes and Reservoirs: Research and Management","volume":"26 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1111/lre.12370","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91792948","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":"Effects of hydrological regimes and limnological parameters on plankton community properties in tropical irrigation reservoirs: A Sri Lankan case study","authors":"Sampath N. Weerakoon,&nbsp;W. Upali Chandrasekara,&nbsp;Upali S. Amarasinghe","doi":"10.1111/lre.12369","DOIUrl":"https://doi.org/10.1111/lre.12369","url":null,"abstract":"<p>Water-level fluctuations are reported to be key processes influencing ecosystem structure and functions in lentic aquatic ecosystems such as reservoirs. The plankton community structure in reservoirs, being useful monitoring tools as reservoir trophic status indicators, are influenced by water quality parameters and water-level fluctuations. The present study tested the hypothesis that plankton community properties in irrigation reservoirs are influenced by hydrological regimes and physical and chemical parameters. Accordingly, the effects of physical, chemical and hydrological parameters on plankton density and taxa richness were investigated for 10 selected irrigation reservoirs of Sri Lanka. The relative reservoir level fluctuation (RRLF), an index of the magnitude of water-level fluctuation in relation to mean depth, had a positive influence on phytoplankton density. Because the RRLF positively influenced phytoplankton density, this index appeared to favour eutrophy in reservoirs. Canonical correspondence analysis (CCA) indicated both the phytoplankton and zooplankton community structure in the study reservoirs was influenced by physical and chemical characteristics. CCA also indicated the plankton taxa abundance and water quality parameters could be used for the trophic classification of irrigation reservoirs. The results of the present study highlight the need for examining attributes based on hydrological regimes in the context of reservoir water quality management.</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.12369","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91787517","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":"Spatio-temporal variations in selected water quality parameters and trophic status of Lake Baringo, Kenya","authors":"Jacques Riziki Walumona,&nbsp;Cyprian Ogombe Odoli,&nbsp;Philip Raburu,&nbsp;Fabrice Muvundja Amisi,&nbsp;Mugo James Murakaru,&nbsp;Benjamin N. Kondowe,&nbsp;Boaz Kaunda-Arara","doi":"10.1111/lre.12367","DOIUrl":"https://doi.org/10.1111/lre.12367","url":null,"abstract":"<p>Lacustrine and riverine ecosystems provide important goods and services, including being habitats for aquatic biodiversity, local micro-climate moderation and a source of economic livelihoods for riparian communities. At the same time, however, they fact continuing anthropogenic and natural threats that can affect their water quality, ecological integrity and biodiversity. The present study focused on assessing spatio-temporal variations in water quality and trophic status of Lake Baringo, a Ramsar site in Kenya. A number of physicochemical parameters, including nutrient loads, trophic status and organic pollution indices, were evaluated for the lake from water samples collected from March 2008 to December 2020. The results of the present study indicated five parameters (turbidity, fluoride, , total phosphorus and DO) exceeded the permissible limits for drinking water based on WHO standards. The water quality index (WQI) values ranged between 556.04 and 693.54, being well above the WHO recommended limit (WQI = 100), indicating Lake Baringo water to be unsuitable for human consumption. The fluoride (F⁻) ions and water turbidity contributed the most relative weights to the lake's WQI. The organic pollution index (OPI) for the lake varied from 4.33 to 4.67, significantly above the organic pollution scale of 1.0–3.9 and indicating the lake is not organically polluted. A positive relationship was found between turbidity and rainfall, suggesting the influence of catchment activities on the lake. The nutrient load had less effect on both the WQI and OPI of the lake, indicating low inputs from the catchment. The lake's trophic status shifted between eutrophic and mesotrophic conditions from 2008 to 2020, based on the Carlson's trophic status index (CTSI) values. Application of a holistic and integrated lake basin management (ILBM) approach is recommended for the management of Lake Baringo and its watershed in order to sustain its ecological processes and the associated riparian community economic livelihood support from the lake.</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.12367","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91787514","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}