Water Biology and Security最新文献

{"title":"Effects of environmentally relevant concentrations of micro(nano)plastics on aquatic microorganisms: Changes in potential function but not in overall composition","authors":"Zhenlu Wang ,&nbsp;Xianghong Dong ,&nbsp;Muzi Zhang ,&nbsp;Lei Gan ,&nbsp;Jian Shao ,&nbsp;Weiling Sun","doi":"10.1016/j.watbs.2023.100233","DOIUrl":"10.1016/j.watbs.2023.100233","url":null,"abstract":"<div><p>Micro(nano)plastics (MNPs) are a growing problem as persistent environmental pollutants. Here, we investigated the impact of MNPs on microorganisms in aquatic microbial floc exposed to NPs (80 ​nm) and MPs (8 ​μm) for 35 days. Water quality indicators were tested weekly and microbiological analyses were conducted on Day 7 and 28 after exposure. The results showed that there were significant differences in the levels of total ammonia nitrogen or nitrite between the MNPs groups and the control group, spanning from Day 7 to Day 28. For the microbial response, microbial community richness in the NPs and MPs groups were significantly increased at Day 7. Functional prediction showed that the relative abundances of bacteria associated with the “Forms Biofilms”, “Potentially Pathogenic”, “Plastic Degradation” and nitrogen cycle processes were significantly different after MNPs exposure. The results suggest that MNPs had no significant effect on the microbial diversity of mature microbial flocs. Findings suggest MPs could cause an increase in the relative abundance of potentially pathogenic bacteria, while NPs do not. In addition, stress associated with MNPs affected the nitrogen cycle of microorganisms, and NPs exerted greater impacts than MPs. Findings from this study further our understanding of the impact of MNPs at environmentally relevant concentrations on microorganisms in aquatic ecosystems.</p></div>","PeriodicalId":101277,"journal":{"name":"Water Biology and Security","volume":"3 1","pages":"Article 100233"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772735123001282/pdfft?md5=9d34fcfde166ef0ad957f845ebc61155&pid=1-s2.0-S2772735123001282-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138612489","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":"Bloom-forming cyanobacteria and dinoflagellates in five Argentinian reservoirs: Multi-year sampling","authors":"Florencia Soledad Alvarez Dalinger ,&nbsp;Borja Claudia Nidia ,&nbsp;Verónica Laura Lozano ,&nbsp;Liliana Beatriz Moraña ,&nbsp;María Mónica Salusso","doi":"10.1016/j.watbs.2023.100232","DOIUrl":"https://doi.org/10.1016/j.watbs.2023.100232","url":null,"abstract":"<div><p>Harmful algal blooms are important threats to reservoir condition. Over a 15-year period, we sampled five Argentinian reservoirs to identify the responsible species for harmful algal blooms and determine the water quality factors driving their occurrence. These reservoirs exhibit diverse morphological and hydrological characteristics and are distributed across varying climatic zones. Cyanobacterial blooms included an array of species, including toxin producers such as <em>Raphidiopsis raciborskii, Aphanizomenon gracile</em>, and <em>Microcystis aeruginosa</em>. In contrast, dinoflagellate blooms were predominantly characterized by <em>Ceratium</em>. The cyanobacterial blooms primarily occurred in the shallower reservoirs located in warmer regions, whereas dinoflagellate blooms occurred where temperatures were lower. The most intense blooms occurred during the summer, and although cyanobacterial and chlorophyte blooms co-occurred, they never coexisted with dinoflagellate blooms. We identified cyanotoxins in the reservoirs over the past three years, a phenomenon previously unreported in the region. Given that these reservoirs are drinking water sources for human populations, ongoing and systematic monitoring is needed to protect public health. Controlling the proliferation of algae and cyanobacteria in reservoirs requires resource management at the watershed level, and in the case of the Itiyuro and El Limón, requires binational management with Bolivia.</p></div>","PeriodicalId":101277,"journal":{"name":"Water Biology and Security","volume":"3 1","pages":"Article 100232"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772735123001270/pdfft?md5=0407745454e31815798aa73ba5d8733c&pid=1-s2.0-S2772735123001270-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139419385","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":"Bio-ecological remediation of freshwater aquaculture environments: A systematic review and bibliometric analysis","authors":"Qiaohong Zhou ,&nbsp;Kaixuan Wu ,&nbsp;Lu Yao ,&nbsp;Ruonan Chen ,&nbsp;Shouzhuang Liu ,&nbsp;Hao Xing ,&nbsp;Linmei Nie ,&nbsp;Zhenbin Wu","doi":"10.1016/j.watbs.2023.100229","DOIUrl":"10.1016/j.watbs.2023.100229","url":null,"abstract":"<div><p>Freshwater aquaculture plays an important role in the global aquaculture industry. The success of freshwater aquaculture relies on the integration of bio-ecological remediation technologies to ensure its sustainable development. This paper systematically reviews the global literatures on bio-ecological remediation of freshwater aquaculture environments from 1990 to 2021, and discusses in detail the research progress and status quo in this field using both bibliometric analysis and content analysis. Our results indicate that the number of publications per year has increased year by year, with a particularly rapid increase after 2015. Institutions and researchers from China and the USA publish the greatest number of papers and contribute the most to this field. By analyzing the research progress in this field, we also find that the protection and restoration of freshwater aquaculture environments has received attention since as early as 1990, such as the application of constructed wetlands and recirculating aquaculture systems. Recently, researchers have increasingly focused on the use of microbial communities in remediation. Furthermore, vanRijn, J's papers are of great value to the research in this field. In content analysis, the application of primary technologies, including plant selection, aquatic animals, microorganisms, and biological filtration and purification equipment, as well as ecological engineering technologies with combinations of various types of organisms, is described to improve the effectiveness and efficiency of remediation. The performance, advantages, disadvantages, or limitations and prospects of these technology applications are analyzed in detail. By comparison, ecological engineering is shown to be the best remediation technology, being most comprehensive, and well-established. Taken together, this paper composes and summarizes existing work in this field, and provides guidance for future research on the improvement of existing technologies and the development of new technologies, with the aim of enhancing remediation capability, improving ecological sustainability and ensuring economic viability.</p></div>","PeriodicalId":101277,"journal":{"name":"Water Biology and Security","volume":"3 1","pages":"Article 100229"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772735123001245/pdfft?md5=5f8d67095341873bd7a43a573a48665b&pid=1-s2.0-S2772735123001245-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135705986","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":"Assessment of water quality using benthic diatom and macroinvertebrate assemblages: A case study in an East China canal","authors":"Xiaojun Jin ,&nbsp;Xuan Lan ,&nbsp;Heqin Sun ,&nbsp;Baowei Hu ,&nbsp;Binliang Wang","doi":"10.1016/j.watbs.2023.100231","DOIUrl":"10.1016/j.watbs.2023.100231","url":null,"abstract":"<div><p>The East Zhejiang Canal is an artificial waterway located in the plains of East China. Because of its role in providing social services, it is frequently subjected to human activities affecting its health. To improve the water resource management and condition of this canal, assessment of its ecological health is necessary. We measured water quality variables and benthic diatom and macroinvertebrate assemblages to evaluate the ecological status of the canal. We found that the canal was eutrophic with an average chemical trophic level index of 64.3 and an average trophic diatom index of 68.1 (with <em>Nitzschia palea</em>, <em>Melosira varians</em>, and <em>Navicula rostellata</em>, <em>Encyonema minutum</em> abundant). Macroinvertebrate assemblages also showed that the canal was eutrophic based on the dominance of <em>Limnodrilus</em> sp. A low BMWP (Biological Monitoring Working Party) score further indicated the poor water quality of the canal. Correlation analysis indicated that phosphorus was the main driver of eutrophication in the canal. Consequently, more attention should be paid to reduce phosphorus loadings.</p></div>","PeriodicalId":101277,"journal":{"name":"Water Biology and Security","volume":"3 1","pages":"Article 100231"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772735123001269/pdfft?md5=f3dd100cddf5786373d96bf1a0f5829a&pid=1-s2.0-S2772735123001269-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136128273","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":"Cladophora as ecological engineer: A new test from the largest lake of Qinghai-Tibet plateau with filamentous algal blooms","authors":"Zhihua Wu ,&nbsp;Xigong Yuan ,&nbsp;Xiong Xiong ,&nbsp;Hongyi Ao ,&nbsp;Chenxi Wu ,&nbsp;Guoxiang Liu ,&nbsp;Huan Zhu","doi":"10.1016/j.watbs.2023.100210","DOIUrl":"10.1016/j.watbs.2023.100210","url":null,"abstract":"<div><p>Filamentous algae blooms (FABs) have been increasing globally in recent years, and their presence can have both harmful and beneficial effects on aquatic ecosystems. As one of the most common FABs, <em>Cladophora</em> blooms have been reported in the lakes of the Qinghai-Tibet Plateau during the past few years. However, there have been few studies focused on how FABs impact other aquatic organisms, especially in alpine lakes since these are at the forefront of responding to global climate change. In this study, the phytoplankton communities in different regions of Qinghai Lake were profiled in different seasons using meta-barcode sequencing. The phytoplankton assemblages in areas with <em>Cladophora</em> blooms were compared to those without <em>Cladophora</em>. The phytoplankton community structure correlated with physicochemical properties including water temperature, electrical conductivity, nitrate, and the presence or absence of <em>Cladophora</em> blooms. The relative abundance of Bacillariophytes was found to be higher in zones with <em>Cladophora</em> blooms than in other regions. Significant seasonal changes in phytoplankton biomass and β diversity were observed in zones with <em>Cladophora</em> blooms. Growth and microbial degradation of <em>Cladophora</em> can change the pH, dissolved oxygen, secchi depth, and nitrate. Together with seasonal temperature and electrical conductivity changes, <em>Cladophora</em> growth can significantly impact the phytoplankton biomass, community dissimilarity and assembly process. These results showed that <em>Cladophora</em> plays a key role in littoral aquatic ecosystem ecology.</p></div>","PeriodicalId":101277,"journal":{"name":"Water Biology and Security","volume":"3 1","pages":"Article 100210"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772735123000963/pdfft?md5=e2bb7a6a0998bbfc031c23cf53d5abbf&pid=1-s2.0-S2772735123000963-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77099141","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":"Plastic effects on marine and freshwater environments","authors":"Fabiula Danielli Bastos de Sousa","doi":"10.1016/j.watbs.2023.100228","DOIUrl":"10.1016/j.watbs.2023.100228","url":null,"abstract":"<div><p>In the 1930s, plastic items started to acquire popularity. Since then, they have overcome many barriers and are now important to many facets of society. Post-consumer plastic, however, is an environmental problem of increasing concern. Marine and freshwater environments are being impaired by plastic pollution, which is mostly the result of improper post-use plastic disposal. Herein I review recent literature on plastic effects to marine and freshwater environments, based on a Scopus search. Authors' keywords were analyzed and mapped. Results depicted microplastics as a global concern for the environment, animals, and human health, and was identified as a primary research focus and emerging topic concerning plastic effects on marine and freshwater environments. The foremost research gap is the lack of clear connections between the effects of plastic on human health, animal health, and the environment. Water pollution and its consequences on marine and freshwater environments are attributed primarily to human activity.</p></div>","PeriodicalId":101277,"journal":{"name":"Water Biology and Security","volume":"3 1","pages":"Article 100228"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772735123001233/pdfft?md5=7e7f3d9fc573f1b6d3f210dcd89c4952&pid=1-s2.0-S2772735123001233-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136127703","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":"Estimating SVCV waterborne transmission and predicting experimental epidemic development: A modeling study using a machine learning approach","authors":"Jiaji Pan ,&nbsp;Qijin Zeng ,&nbsp;Wei Qin ,&nbsp;Jixiang Chu ,&nbsp;Haibo Jiang ,&nbsp;Haiyan Chang ,&nbsp;Jun Xiao ,&nbsp;Hao Feng","doi":"10.1016/j.watbs.2023.100212","DOIUrl":"10.1016/j.watbs.2023.100212","url":null,"abstract":"<div><p>Viral infectious diseases significantly threaten the sustainability of freshwater fish aquaculture. The lack of studies on epidemic transmission patterns and mechanisms inhibits the development of containment strategies from the viewpoint of veterinary public health. This study raises an epidemic mathematical model considering water transmission with the aim of analyzing the transmission process more accurately. The basic reproduction number <em>R</em>_<em>0</em> was derived by the model parameter including the water transmission coefficient and was used for the analysis of the virus transmission. Spring viremia of carp virus (SVCV) and zebrafish were used as model viruses and animals, respectively, to conduct the transmission experiment. Transmission through water was achieved by connecting two aquarium tanks with a water channel but blocking the fish movement between the tanks. With the collected experimental data, we determined the optimal hybrid machine learning algorithm to analyze the transmission process using an established mathematical model. In addition, future transmission was predicted and validated using the epidemic model and an optimal algorithm. Finally, the sensitivity of model parameters and the simulations of <em>R</em>_<em>0</em> variation were performed based on the modified complex epidemic model. This study is of significance in providing theoretical guidance for minimizing <em>R</em>_<em>0</em> by manipulating model parameters with containment measures. More importantly, since the modified model and algorithm demonstrated better performance in handling freshwater fish transmission problems, this study advances the future application of transmissible disease modeling with larger datasets in freshwater fish aquaculture.</p></div>","PeriodicalId":101277,"journal":{"name":"Water Biology and Security","volume":"3 1","pages":"Article 100212"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772735123000987/pdfft?md5=20dfeb20c908195f8f2d9562649284f0&pid=1-s2.0-S2772735123000987-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135249488","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":"Diet variability of snappers (Teleostei: Lutjanidae) in a bay-to-reef ecosystem of the Mexican Caribbean","authors":"León Felipe Martínez-Juárez ,&nbsp;Juan J. Schmitter-Soto ,&nbsp;Nancy Cabanillas-Terán ,&nbsp;Norman Mercado-Silva","doi":"10.1016/j.watbs.2023.100211","DOIUrl":"10.1016/j.watbs.2023.100211","url":null,"abstract":"<div><p>Fishes use environmental resources differently. Snapper ontogenic movements among coastal habitats lead to diverse diets. We investigated the diets of seven snapper species (<em>Lutjanus apodus</em>, <em>L. analis</em>, <em>L. griseus</em>, <em>L. jocu</em>, <em>L. mahogoni</em>, <em>L. synagris</em>, and <em>Ocyurus chrysurus</em>) in three interconnected coastal environments in the western Caribbean: Río Huach channel, Chetumal/Corozal bay, and the adjacent Xcalak reef lagoon. These three encompass all habitats used by the seven species in the study area. Snapper diets were mostly composed of fish and crustaceans, but dominance of either group varied among the studied habitats; for example, fish were the main prey for <em>L. apodus</em> from the reef lagoon zone, but second in the bay. Snappers are piscivorous-invertivorous mesopredators; the species that relied the most on fishes were <em>L. griseus</em> and <em>L. jocu</em>, whereas <em>O</em>. <em>chrysurus</em> preferred crustaceans. Stomach content results revealed a high degree of dietary overlap among species. Our findings suggested a tradeoff in relative weight between fish and crustaceans as the main food source of snappers at these connected areas, supporting the hypothesis of niche segregation. Our results can be used as a baseline to further our understanding of the ecology and differences in resource use by snapper species in an area undergoing important anthropogenic changes.</p></div>","PeriodicalId":101277,"journal":{"name":"Water Biology and Security","volume":"3 1","pages":"Article 100211"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772735123000975/pdfft?md5=a4cb4a5dd2ad1426f87dba374ae976ae&pid=1-s2.0-S2772735123000975-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76360900","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":"Assessments and diagnoses of aquatic ecosystem integrity based on integrity requirements of ecosystem service targets","authors":"Hong-Zhu Wang","doi":"10.1016/j.watbs.2023.100230","DOIUrl":"10.1016/j.watbs.2023.100230","url":null,"abstract":"<div><p>This paper critically reviews the progress in ecosystem integrity (health) assessment of inland waters and provides future directions for assessment. Current biotic integrity assessments mainly use multimetric indices and predictive models to evaluate overall health status; the criteria largely rely on pristine reference sites, but such an approach is not applicable to unique natural waters and irreversibly modified waters. Biotic diagnostic assessments are still in the exploratory stage and can only diagnose possible stressor types and wide-ranges of their intensities through empirical models linking stressors and species-trait-indices. Current chemical integrity assessments mainly use criteria determined by small-scale ecotoxicity tests, rather than quantitative relationships developed between chemical factors and biotic effects in real ecosystems, thus potentially under or over-estimating pollutant toxicity. Current physical integrity assessments focus on overall habitat quality, rather than quantitative habitat requirements, and thus cannot provide quantitative support for ecological restoration and conservation. Current hydrological integrity (environment flow) assessments largely depend on quantitative relationships between hydrological regimes with a few species and single groups, rather than with whole communities, and fail to comprehensively diagnose hydrological causes of biotic resource decline. In the future, integrity assessments need to be based on ecosystem integrity requirements of ecosystem service targets: first, there is a need to build quantitative relationships between biotic integrity and ecosystem services, assess requirements of community structure and function for service goals, and establish biotic integrity assessment methods; second, we must build quantitative relationships between biotic integrity and abiotic integrity in real ecosystems, assess chemical, physical, and hydrological integrity requirements of biotic needs, and establish diagnostic assessment methods.</p></div>","PeriodicalId":101277,"journal":{"name":"Water Biology and Security","volume":"3 1","pages":"Article 100230"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772735123001257/pdfft?md5=2d36d61e0478db28b52efb454f9c682a&pid=1-s2.0-S2772735123001257-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136011001","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":"Identification of potential indicators for testis quality in swamp eels (Monopterus albus) through metabolomics analysis","authors":"Fei Liu ,&nbsp;Xing Lin ,&nbsp;Kaifeng Meng ,&nbsp;Yuanyuan Chen ,&nbsp;Hairong Liu ,&nbsp;Yuanli Zhao ,&nbsp;Daji Luo","doi":"10.1016/j.watbs.2023.100204","DOIUrl":"https://doi.org/10.1016/j.watbs.2023.100204","url":null,"abstract":"<div><p>The swamp eel (<em>Monopterus albus</em>) is a commonly cultured freshwater fish. Selection and cultivation of fecund broodstock is crucial for efficient artificial reproduction in this species. However, there are currently no guidelines for selecting high-quality males in <em>M. albus</em>. This study quantitatively investigated the sperm motility of male swamp eels during the breeding season by using computer-assisted sperm analysis system. Variability in the proportion and number of motile sperm was observed between individual males. The testes were grouped into high-quality and low-quality according to sperm quality. Morphometric parameters of the two groups were analyzed. We found that high-quality testes were longer (150 ​± ​27 ​mm verses 127 ​± ​19 ​mm) than low-quality testes. Besides, the proportion of testes with a dark appearance was slightly higher (58.3% verses 48.1%) in the high-quality group than in the low-quality group. Metabolomic analysis was conducted to compare the metabolite profiles of high-quality and low-quality testes. Glycerophospholipids, organic acids, glycerolipids, amino acids, sphingolipids, and nucleotides were the most abundant metabolites in the testes of swamp eels. Moreover, 135 differential metabolites were identified. Several nucleotide derivatives, including 5′-deoxyadenosine, 2′-deoxyadenosine, and ribosyl adenosine, were the most significantly enriched metabolites in high-quality testes. These metabolites are potential indicators for the testis quality in <em>M. albus</em>. Altogether, our work provides systematic and quantitative data about the physiological and biochemical characteristics of <em>M. albus</em> testis, which provides an evidential basis for the selection of high-fecundity parents to improve artificial reproduction efficiency of <em>M. albus</em>.</p></div>","PeriodicalId":101277,"journal":{"name":"Water Biology and Security","volume":"2 4","pages":"Article 100204"},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49713014","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}