Lakes and Reservoirs: Research and Management最新文献

{"title":"Extension of distributional range with a new record of cyprinid Opsarius dogarsinghi (Hora, 1921) from river Torsa of Jaldapara National Park complex, West Bengal, India","authors":"Dibakar Bhakta,&nbsp;Ranjan K. Manna,&nbsp;Sangeetha M. Nair,&nbsp;Raban C. Mandi,&nbsp;Srikanta Samanta,&nbsp;Basanta K. Das","doi":"10.1111/lre.12439","DOIUrl":"https://doi.org/10.1111/lre.12439","url":null,"abstract":"<p>A cyprinid, <i>Opsarius dogarsinghi</i> (Hora, 1921) was recorded for the first time in September 2021 from the Kodalbasti section of the river Torsa, Jaldapara National Park complex. In September 2021, gill nets with a mesh size of 30 mm were used to catch a total of three specimens of <i>O. dogarsinghi</i> from the flowing water in the Kodalbasti section of the river Torsa. The species is endemic and has only been reported from a few north-eastern regions of India. The current research widens the species' geographical range from its original habitat in the river Torsa of West Bengal, India. The physicochemical properties of their riverine habitat were also described.</p>","PeriodicalId":39473,"journal":{"name":"Lakes and Reservoirs: Research and Management","volume":"28 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50131988","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":"Ecological integrity of a medium-sized river of a lake basin towards ecosystem health management","authors":"George Owiti Osure,&nbsp;Christopher Mulanda Aura,&nbsp;Albert Getabu,&nbsp;Reuben Omondi,&nbsp;Evans Basweti","doi":"10.1111/lre.12441","DOIUrl":"https://doi.org/10.1111/lre.12441","url":null,"abstract":"<p>This study demonstrates the use of a multi-metric Fish Index of Biotic Integrity (FIBI) for assessment of ecological health of a medium-sized river, under a gradient of human disturbances in the Kenyan side of the Lake Victoria Basin (LVB). Development of the index is based on water quality, river habitat quality and fish community attributes. The river was sampled from 2019 to 2020 during wet and dry seasons of the year at nine selected sites along its length based on the level of human disturbance. A total of nine metrics representing the structural and functional organization of fish communities were qualified using the separation power of Mann–Whitney <i>U</i> test (<i>p</i> &lt; .05). Metric values at unimpaired, intermediate, impaired and no-fish sites were used to establish the scoring criteria using inter-quartile ranges. A 1, 3, 5 scoring system representing high, fair and slight deviation from the best site, respectively, was used in the final FIBI development. River mouth station had the highest FIBI score of 43, with extensive natural riparian buffer vegetation (&gt;20 m) and 18 fish species implying least human disturbance. The midstream section had intermediate FIBI scores of 34–36, with wide natural riparian buffer vegetation (10–20 m) and 6–9 fish species that represented moderate human disturbance. The upstream section had the least FIBI score of 0, with no fish and narrow riparian buffer vegetation (&lt;5 m) that indicated notable degradation. This study presents the preliminary results of using fish and habitat metrics for development of an Index of Biotic Integrity (IBI) for a medium-sized river in a lake basin, as a decision-making support tool for effective management and conservation of water resources. The study recommends restoration of river habitat quality for improved ecological integrity of rivers in the Lake Victoria Basin.</p>","PeriodicalId":39473,"journal":{"name":"Lakes and Reservoirs: Research and Management","volume":"28 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50131989","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":"Putting the cart before the horse—Dal Lake's Tale of Woe","authors":"Neha W. Qureshi,&nbsp;Korekallu Srinivasa Aditya,&nbsp;M. Krishnan,&nbsp;Badri Narayanan Gopalakrishnan","doi":"10.1111/lre.12438","DOIUrl":"https://doi.org/10.1111/lre.12438","url":null,"abstract":"<p>Dal Lake is not only the centre of tourist attraction, but also an important livelihood source for the local population. The economic activities over the years in and around the lake have intensified, resulting in pollution, eutrophication and encroachment of the lake. The present study examined the multiple economic activities carried out on Dal Lake, estimated the net welfare generated, and subsequently developed a solution focusing on establishing an optimal trade-off between the economic activities and pollution abatement expenditures incurred by the government. Employing optimization techniques, needed modifications in the configuration of the enterprises and the pollution abatement costs that could maximize the net welfare from Dal Lake were identified. The economic welfare of the three enterprises was maximized at the optimal level of INR 5684.85 million, with a pollution-abating investment of INR 13.21 million.</p>","PeriodicalId":39473,"journal":{"name":"Lakes and Reservoirs: Research and Management","volume":"28 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50120062","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":"Relative growth and morphological sexual maturity of the caridean prawn Macrobrachium villosimanus (Tiwari, 1949) (Decapoda: Palaemonidae)","authors":"Ferdous Ahamed,&nbsp;Zoarder Faruque Ahmed,&nbsp;Jun Ohtomi","doi":"10.1111/lre.12437","DOIUrl":"https://doi.org/10.1111/lre.12437","url":null,"abstract":"<p>Reproductive success for crustaceans depends on the transition from juvenile to adult, which can be estimated by analysing relative growth. To this end, the present study focused on the relative growth of appendix masculina length (AML), hatchery chamber width (HCW), body length (BL) and body weight (BW) in relation to carapace length (CL) of <i>Macrobrachium villosimanus</i> to estimate the morphological sexual maturity using the least squares method. Data for each relationship were repeatedly partitioned into two size-delimited subsets (juvenile and adult stages), considering a CL value as a hypothesized transition point. Analysis of the residuals sum of squares indicated two separate linear regressions fit the data better than a single linear regression. The study results indicated a discontinuity in allometry at 17.9 mm CL for CL versus AML, and at 15.6 mm CL for CL versus HCW relationships. These observed transition points could be associated with morphological sexual maturity of <i>M. villosimanus</i>. The BL and BW growth rate in relation to CL significantly decreased in males, but increased in females after reaching the morphological sexual maturity, demonstrating the existence of dimorphic growth. The increased growth rate after reaching sexual maturity in females probably corresponds to more space for the eggs and subsequent increased fertility. Accordingly, the present study indicated the secondary sexual characters (e.g. AML and HCW) play roles in attaining the morphological sexual maturity necessary for reproductive success and for ensuring the life cycle of this species.</p>","PeriodicalId":39473,"journal":{"name":"Lakes and Reservoirs: Research and Management","volume":"28 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50149494","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":"Photochemical processes in surface water bodies and their potential impacts on the chemical composition of water: A review","authors":"Peter Linnik,&nbsp;Volodymyr Osadchyi,&nbsp;Natalia Osadcha","doi":"10.1111/lre.12436","DOIUrl":"https://doi.org/10.1111/lre.12436","url":null,"abstract":"<p>The present study is a review of photochemical processes that occur in surface water bodies and which can affect the chemical composition of water. It is expected that water bodies with a slow rate of water exchange, including lakes, reservoirs, estuaries and ponds with significant areas of shallow water will be most vulnerable to the impacts of these processes. It involves natural organic compounds and xenobiotics of organic origin that enter water bodies from anthropogenic sources or are formed in water bodies because of the development of cyanobacteria and other algae species. Photodegradation of dissolved organic matter (DOM) occurs as a result of both direct photolysis and photosensitized cleavage involving inorganic and organic compounds, which are characterized by chromophore properties, such as humic substances. Photolysis is accompanied by the transformation of high molecular weight organic compounds into lower molecular weight compounds that can become bioavailable to, and promote the development of, microorganisms. Photodegradation results in bioavailable forms of nitrogen and phosphorus being released into the water column. Accordingly, the present study presents the results of analysis of the photochemical destruction of humic substances, such as the most widespread group of the surface water body DOM under the influence of artificial UV irradiation and solar radiation. The results provide data on the products of humic substances photolysis, as well as the influence of the latter on the destruction of a number of organic substances, including xenobiotics (herbicides, pesticides, etc.). Photolysis of algotoxins, which are mainly concentrated in the water of highly trophic reservoirs and lakes during the period of water “blooming,” is among the main concerns being addressed, noting photochemical destruction of these dangerous toxicants can be considered an important means of removing them from drinking water. Also emphasized is that photochemical processes in surface water will likely intensify in the future amid the recent climate changes, also affecting the chemical composition of water.</p>","PeriodicalId":39473,"journal":{"name":"Lakes and Reservoirs: Research and Management","volume":"28 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50143218","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":"How vulnerable are Wular Lake fishing communities compared to non-fishing communities in rural Kashmir? Insights and interventions for development","authors":"Regu Atufa,&nbsp;Pachampalayam Shanmugam Ananthan,&nbsp;Shivaji Dadabhau Argade,&nbsp;Neha Wajahat Qureshi","doi":"10.1111/lre.12434","DOIUrl":"https://doi.org/10.1111/lre.12434","url":null,"abstract":"<p>Wular Lake, one of the largest wetlands in Asia (13,000 ha in Kashmir Valley) is a biodiversity-rich Ramsar site supporting nearly 32,000 rural people involved in harvesting fish, water chestnuts, lotus stems and fodder. With 2914 active fishers, Wular Lake contributes 54% of Kashmir's total fish catch. Large-scale land-use changes and global warming have resulted in siltation, reduced lake area and alterations in the water flow regime, threatening lake ecology and human livelihoods. A novel census-based multi-criteria Socio-Economic Vulnerability Index (SEVI) was used to assess the vulnerability status of 23 fishing and 115 non-fishing adjacent villages. All the fishing villages exhibited ‘low’ (0.21–0.40) vulnerability levels, except <i>Kunas</i> village (0.42). Interestingly, no significant differences could be found in vulnerability levels between fishing (23) and non-fishing (115) villages, although the former exhibited relatively <i>higher</i> social sensitivity. A graphical decision matrix based on sensitivity and adaptive capacity scores provided a snapshot of vulnerability status for each village. Using SEVI scores, <i>drivers</i> (i.e., key indicators responsible for high sensitivity &amp; low adaptive capacity) were identified and corresponding village-specific development interventions are suggested with <i>Kunas</i> as an illustrative case village. Improving education levels, strengthening community and rural infrastructure, and expanding livelihood options were key short-term strategies for improving resilience in Kashmir's Wular region.</p>","PeriodicalId":39473,"journal":{"name":"Lakes and Reservoirs: Research and Management","volume":"28 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50118612","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":"The dynamism of communication technology adoption, market information and welfare: Evidence from Nile perch (Lates niloticus) fish market, Mwanza, Tanzania","authors":"Felician Kitole,&nbsp;Robert Lihawa,&nbsp;Jennifer Sesabo,&nbsp;Christina Shitima","doi":"10.1111/lre.12433","DOIUrl":"https://doi.org/10.1111/lre.12433","url":null,"abstract":"<p>Despite the growing importance of digital technology in modern society, its adoption in some sectors and regions has been slow. One such sector is fishing in developing countries, where the potential benefits of technology have yet to be fully realized. This study examines the adoption of communication technology among Nile perch fishers on Lake Victoria in Mwanza, Tanzania. Using a Probit model and Ordinary Least Square (OLS) estimations with Robust Standard Errors (OLSR), the study analyzes the impact of technology adoption on fishers' welfare, with a focus on income. The results suggest that the type of mobile phone, fishing experience, and the desire to exploit digital marketing are key factors in technology adoption among fishers. Furthermore, the study finds that technology adoption has a significant positive impact on fishers' welfare, indicating that digitalization can increase market competitiveness, openness, and improve livelihoods. To capitalize on these benefits, the study recommends that the government should support the digitalization of the fishing market and make accurate and timely market information readily available to fishers.</p>","PeriodicalId":39473,"journal":{"name":"Lakes and Reservoirs: Research and Management","volume":"28 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50118611","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":"The Government and Lake Governance Criteria for the Seven Crater Lakes of San Pablo City, Laguna, Philippines","authors":"Bing Baltazar C. Brillo","doi":"10.1111/lre.12435","DOIUrl":"https://doi.org/10.1111/lre.12435","url":null,"abstract":"<p>The Local Government and the Government Agency shape the Seven Crater Lakes. The present study focused on understanding the predominant Governments and Lake Governance's concept vis-a-vis the small lakes and their basin communities. These foremost authorities are intertwined, and Lake Governance's essential criteria interplayed and continuous to the responsibility. Although the City Government of San Pablo City and the Laguna Lake Development Authority (LLDA) have improved the small lake's situations and they are satisfactorily functioning, serious issues still remain at present and into the future. Focusing on the criteria's lessons, Pandin Lake, Yambo Lake, Mohicap Lake and Sampaloc Lake have been ameliorated to varying degrees. In contrast, Bunot Lake, Palakpakin Lake and Calibato Lake continue to struggle with deficiencies. Thus, over the dual governments need to exhibit greater commitment, decisiveness and effectiveness if the Seven Crater Lakes are to flourish in development and conservation. Furthermore, while the Structuring Government and Administering Water criteria are adequate, completing the Developing Tourism, accomplishing the Regulating Fishery and substantially subsidizing the Supporting Finance in the City Government and the LLDA remain deficient. Accordingly, the main target of the paired Governments' over time is to address the remaining challenges facing the Seven Crater Lakes.</p>","PeriodicalId":39473,"journal":{"name":"Lakes and Reservoirs: Research and Management","volume":"28 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50141365","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":"Influence of net cages on water quality and trophic status of Lake Victoria, Kenya: The case of Kadimu Bay","authors":"Sellu Mawundu,&nbsp;Riziki Walumona Jacques,&nbsp;David Mbeva Liti,&nbsp;John Ouko,&nbsp;Achieng Alfred,&nbsp;Adiang’ Evans,&nbsp;Boaz Kaunda-Arara","doi":"10.1111/lre.12432","DOIUrl":"https://doi.org/10.1111/lre.12432","url":null,"abstract":"<p>Water quality is a critical component regulating ecosystem functioning in aquatic habitats, requiring regular monitoring for sustainable ecosystem services. Cage fish farming has the potential to affect water quality because of its rapid increase in many African waterbodies in response to dwindling wild fish stocks. Thus, there is a need for more studies to guide sustainable cage aquaculture in African lakes and reservoirs. This study evaluated the possible effects of cage farming of Nile tilapia (<i>Oreochromis niloticus</i>) on water quality parameters and the trophic state of Kadimu Bay, Lake Victoria, Kenya. Sampling for physicochemical and biological variables, including nutrient load, was conducted from January to October 2021, at five fish cage sites and a control site within the bay. In situ measurements of physical variables were undertaken in the field, while analysis of water samples for nutrient loads, biological and chemical variables was undertaken in the laboratory, following the methods described in APHA (<i>American public health association standard methods for the examination of water and waste water</i>. APHA-AWWA-WEF, 2005). The Carlson's Trophic State Index (CTSI) was used to classify the trophic state of the cage sites, while the total nitrogen:total phosphorus (TN:TP) ratio was used to determine the primary productivity limiting nutrient in the bay. The study results indicated electrical conductivity was significantly lower at the control (97.53 ± 4.17 μS/cm), compared to cage sites (105.42 ± 5.32 μS/cm at the Utonga cage site to 112.84 ± 1.94 μS/cm at the Oele cage site), indicating water of relatively lower quality at the cage sites. Similarly, the nitrite concentrations were higher at cage sites (6.35 ± .96 μg/L at the Uwaria cage site to 3.16 ± 2.25 μg/L at the Utonga cage site), and lower at the control site (2.68 ± 1.39 μg/L). In all, 14 physicochemical variables did not vary significantly between the cage and control sites, with nine variables (temperature, turbidity, electrical conductivity, total suspended solids, particulate organic matter, chlorophyll-a, TP, nitrate and TN) being within the recommended thresholds for aquatic life processes. The bay was evaluated as being in a light eutrophic state, indicating moderate influence of the fish cages on the trophic state of the sites. There was a moderate relationship between chlorophyll-a and TP concentration at the sampling sites (<i>R</i>² = .50), compared to a stronger relationship with <math>\u0000 <semantics>\u0000 <mrow>\u0000 <msubsup>\u0000 <mi>NO</mi>\u0000 <mn>3</mn>\u0000 <mo>−</mo>\u0000 </msubsup>\u0000 </mrow>\u0000 <annotation>$$ {mathrm{NO}}_3^{-} $$</annotation>\u0000 </semantics></math> (<i>R</i>² = .78). The TN:TP ratios were &lt;10 at the sampling sites, indicating nitrogen was the limiting factor for primary produc","PeriodicalId":39473,"journal":{"name":"Lakes and Reservoirs: Research and Management","volume":"28 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50126876","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":"Intraspecific morphological variations of the vulnerable loach, Lepidocephalichthys annandalei (Cypriniformes: Cobitidae) in inland waterbodies at southwestern Bangladesh","authors":"Md. Abdus Samad,&nbsp;Md. Sarower-E Mahfuj,&nbsp;Fee Faysal Ahmed,&nbsp;Shaid-Ur Rahman,&nbsp;Md. Yeamin Hossain","doi":"10.1111/lre.12428","DOIUrl":"https://doi.org/10.1111/lre.12428","url":null,"abstract":"<p>Wild fish populations are unceasingly diminishing in the rivers, ox-bow lakes and floodplains in the Southwestern region of Bangladesh. Investigating the population status of vulnerable wild fish species are vital for the management and conservation of that species. This study aimed to identify the intra-specific morphological variation and determine the population status of <i>Lepidocephalichthys annandalei</i>, in two rivers, the Nabaganga River in Jhenaidah (NRJ) and the Bhairab River in Jashore (BRJ) as well as a flood plain, the Dhakuria <i>Beel</i> in Jashore (DBJ) from Southwestern Bangladesh. Significant differences were observed in seven conventional and five truss-based characters in univariate statistics. Conventional and truss-network results from principal component analysis and CVA exhibited that populations were entirely intermixed, creating a compact cluster within intra-population stages. Four principal components explained 51.93% of the variation in conventional morphometric characters and truss-based characters. A UPGMA dendrogram was independently developed based on conventional and truss-based morphometric characters. Among the individuals of NRJ and BRJ populations confirmed the presence of out-group rather than the DBJ based on morphometric (conventional and truss) features. These notable isolations of populations of this species were supposed to be geographic disconnection and abiotic parameters. The evidence ensuing from the present study would be valuable for genetic studies as well as for in situ management.</p>","PeriodicalId":39473,"journal":{"name":"Lakes and Reservoirs: Research and Management","volume":"28 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50131317","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}