Aquatic EcologyPub Date : 2025-03-02DOI: 10.1007/s10452-025-10180-3
João Hemerson de Sousa, Betsy Dantas de Medeiros, Bruno Renaly Souza Figueiredo, Maria João Feio, Daniele Jovem-Azevêdo
{"title":"Tracking the occurrence and global expansion of the non-native mollusk Corbicula largillierti (Bivalvia, Cyrenidae) in aquatic ecosystems","authors":"João Hemerson de Sousa, Betsy Dantas de Medeiros, Bruno Renaly Souza Figueiredo, Maria João Feio, Daniele Jovem-Azevêdo","doi":"10.1007/s10452-025-10180-3","DOIUrl":"10.1007/s10452-025-10180-3","url":null,"abstract":"<div><p><i>Corbicula largillierti</i> is an invasive bivalve with significant socioeconomic and ecological impacts reported globally. However, a comprehensive review documenting its status, distribution, and expansion rate is lacking. This study aimed to investigate the global distribution and expansion of <i>C. largillierti</i> in aquatic ecosystems. A systematic literature review and field sampling were conducted in watersheds receiving water transfers from the São Francisco River Integration Project (PISF/Eastern Axis) in the semiarid region of Brazil. The findings showed 307 occurrence records for <i>C. largillierti</i> in 14 countries across four continents. However, its expansion rate varies between countries and continents, with the annual expansion rate being higher at local scales (12.54%) than at regional (5.39%) and global scales (1.38%). Its occurrence was particularly high in South America (n = 235), mainly in Brazil (n = 155) and Argentina (n = 75), where the number of records exceeds that reported worldwide. Additionally, we recorded the first occurrence of <i>C. largillierti</i> in the Pajeú River Watershed (n = 12), and the spread of this invasive mollusk in the Paraíba River Watershed (n = 75). These observations suggest that the PISF may have facilitated the introduction and dispersion of species in these watersheds. Taken together, our findings show that <i>C. largillierti</i> is an invasive species with continuous expansion worldwide, especially in South America. Our results emphasize the urgent need to enhance control and prevention measures in countries where the prevalence is higher, highlighting its potential negative impacts on local ecosystems.</p></div>","PeriodicalId":8262,"journal":{"name":"Aquatic Ecology","volume":"59 2","pages":"561 - 575"},"PeriodicalIF":1.7,"publicationDate":"2025-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144073828","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Homogenization and distinction of coral recruit communities between natural and artificial substrates at Koh Tao a decade after deployment","authors":"Coline Monchanin, Matthias Desmolles, Rahul Mehrotra","doi":"10.1007/s10452-025-10182-1","DOIUrl":"10.1007/s10452-025-10182-1","url":null,"abstract":"<div><p>Thousands of tonnes of artificial substrate have been deployed across the Gulf of Thailand in recent decades for the purpose of habitat creation and reef restoration. At the island of Koh Tao, these were mostly deployed between 2011 and 2017. Field surveys conducted in 2018–19 (an average of 44 months post deployment) at the island revealed considerable disparity in the community structures of scleractinian corals with recruit communities from artificial reefs and natural giant clam shells differing significantly from mature communities (reefs and pinnacles). Despite multiple biotic and abiotic variables being tested, no single explanation was found, and thus the findings were evaluated in the context of multiple hypotheses. In this study, we present findings from a repeated assessment of the same sites and substrates, carried out in 2023 (an average of 102 months post deployment), with significant differences in scleractinian recruit communities between survey periods, and again when compared with natural reefs and pinnacles. Based on a new dataset of 5442 coral recruits (clam shells and artificial reefs) and 2.46 km of reef and pinnacle transect data, we observed a significant increase in the heterogeneity of recruit communities on artificial reefs, with clear indications of convergence with mature reef communities. Meanwhile on natural substrates (reefs, pinnacles and shells), we observed proportionally little difference in communities between surveys (with some exceptions such as an increase in the proportion of <i>Platygyra</i> corals). Our findings support the assertion that small changes in depth may significantly influence the rate and direction of community change.</p></div>","PeriodicalId":8262,"journal":{"name":"Aquatic Ecology","volume":"59 2","pages":"597 - 608"},"PeriodicalIF":1.7,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144073894","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Analysis of the spatial differentiation characteristics of fish community structures in different water body types in the upper reaches of the Taihu Lake Basin based on environmental DNA technology","authors":"Junjiang Liu, Xiangen Xu, Liwan Zhou, Zhining Chen, Lina Chen, Tao Song, Sheng Feng, Puqing Xu","doi":"10.1007/s10452-025-10178-x","DOIUrl":"10.1007/s10452-025-10178-x","url":null,"abstract":"<div><p>Fish are the key groups for maintaining the health and stability of aquatic ecosystems. However, due to limitations in existing fish survey techniques, there has been insufficient systematic research on fish resources and community structures in the context of Yangtze River fish conservation. Given this, taking the upstream area of the Taihu Lake Basin, a region with a developed freshwater fishery in China, as a case study, this research adopted environmental DNA (eDNA) technology to monitor the structural characteristics, diversity, and spatial distribution of fish communities in different water body types. The research findings showed that a total of 88 fish species were detected at 127 monitoring sites, with 79 species in rivers, 71 species in lakes, 73 species in reservoirs, and 57 species in streams. Among them, the fish composition in rivers and lakes presented homogenisation, with pollution-tolerant fish such as <i>Carassius auratus</i>, <i>Cyprinus carpio</i>, and <i>Aristichthys nobilis</i> being the dominant species. Although the fish communities in some reservoirs and streams also showed a slight trend of homogenisation, more fish species with higher water quality requirements, like the <i>Rhinogobius giurinus</i> and <i>Odontobutis potamophila</i> were retained. In areas with a high degree of human aggregation, namely the Yangtze River-the Grand Canal (CY), the Tao Lake-Ge Lake area (TG), and the area flowing into Lake Taihu (RT), the fish communities were dominated by tolerant fish species. In the Maoshan-Tianmu Mountain area (MT), where human activities were sparsely dispersed, the fish communities were relatively richer in clear-water fish species. TN, EC, pH, WT, and the natural shoreline retention rate (NSR) were the key environmental influencing factors for the composition of fish communities in the study area. The fish communities in rivers and lakes were more significantly affected by water environmental quality factors such as TN, EC, pH, and WT, while the fish communities in reservoirs and streams were more influenced by the aquatic habitat factor NSR. There was a significantly positive correlation between NSR and the fish diversity in rivers and lakes, and a significantly negative correlation between NSR and that in reservoirs and streams. This study has completed the inventory of fish species resources in the upper reaches of the Taihu Lake Basin, laid a scientific foundation for the restoration and protection of fish resources in the Taihu Lake Basin, and contributed to the sustainable protection and restoration of the aquatic ecosystem in the Taihu Lake Basin.</p></div>","PeriodicalId":8262,"journal":{"name":"Aquatic Ecology","volume":"59 2","pages":"523 - 539"},"PeriodicalIF":1.7,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144073745","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Aquatic EcologyPub Date : 2025-02-17DOI: 10.1007/s10452-025-10174-1
Robert M. Burdis, Nicole K. Ward, John T. Manier
{"title":"Phytoplankton assemblage dynamics in relation to environmental conditions in a riverine lake","authors":"Robert M. Burdis, Nicole K. Ward, John T. Manier","doi":"10.1007/s10452-025-10174-1","DOIUrl":"10.1007/s10452-025-10174-1","url":null,"abstract":"<div><p>Understanding drivers of phytoplankton assemblage structure is essential given the ecological, aesthetic, and health consequences that vary among taxonomic groups. In this study, we examined phytoplankton assemblage structure over a three-year period in a natural riverine lake in the Upper Mississippi River. Phytoplankton samples along with a suite of limnological variables were collected along a longitudinal gradient of the lake to investigate potential relationships, mechanisms, and drivers between environmental conditions and phytoplankton assemblage structure. We found over 100 phytoplankton taxa and assemblage structure varied between years, months, and sites. With the use of a distance-based linear model, 32.6% of the total variation in phytoplankton assemblages was explained by a combination of chemical, hydrological, and physical variables. Additionally, we noted a one-year absence of the common diatom, <i>Stephanodiscus hantzschii</i>, that may have been related to an unusual spring of warm water temperature and low soluble reactive phosphorus concentrations, indicating possible nutrient limitation in a large river system. Insights into the relationships between environmental conditions and individual and co-occurring species of phytoplankton should aid in developing a greater predictability of assemblages and may enable large river scientists and managers to better anticipate and address water quality conditions under changing climate and hydrologic regimes.</p></div>","PeriodicalId":8262,"journal":{"name":"Aquatic Ecology","volume":"59 2","pages":"467 - 485"},"PeriodicalIF":1.7,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10452-025-10174-1.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144073717","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Aquatic EcologyPub Date : 2025-02-11DOI: 10.1007/s10452-025-10170-5
Karina Fidanza, Raytha de Assis Murillo, Márcio José Silveira, Endrel de Azevedo Godoi, Sidinei Magela Thomaz
{"title":"High nutrient availability does not mitigate submersion stress in an emergent aquatic macrophyte","authors":"Karina Fidanza, Raytha de Assis Murillo, Márcio José Silveira, Endrel de Azevedo Godoi, Sidinei Magela Thomaz","doi":"10.1007/s10452-025-10170-5","DOIUrl":"10.1007/s10452-025-10170-5","url":null,"abstract":"<div><p>In floodplains, the depth of water can directly impact the development of aquatic macrophytes. In this study, we used the emergent macrophyte <i>Polygonum ferrugineum</i> Wedd to investigate whether increased nutrient availability in the sediment alleviates submergence stress caused by flood conditions. Using a factorial design, we planted seedlings in two types of sediment (unenriched and enriched with P and N), subjecting them to deep and shallow water treatments. The effects of these treatments on plant attributes were assessed using a two-way ANOVA. The interaction between nutrients and depth significantly influenced most measured attributes (total biomass, shoot length, shoot biomass, leaf area, and root biomass). The highest values for these variables were observed when plants were grown in shallow water with high nutrient concentrations in the sediment. Root length and root:shoot ratios were influenced solely by depth, both of which were greater in the shallow treatment compared to the deep treatment. Our findings demonstrate that the growth of <i>P. ferrugineum</i> only occurs in shallow water where shoots are exposed to the atmosphere. Furthermore, our data indicate that greater depths (> 0.7 m) negatively impact growth regardless of nutrient availability. Therefore, we reject the hypothesis that high nutrient availability mitigates submersion stress. Our results contribute to the discussion on the impact of floods on emergent macrophyte species, highlighting the rapid morphological changes observed due to nutrient conditions in flooded sediments.</p></div>","PeriodicalId":8262,"journal":{"name":"Aquatic Ecology","volume":"59 2","pages":"407 - 417"},"PeriodicalIF":1.7,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144073681","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Aquatic EcologyPub Date : 2025-02-08DOI: 10.1007/s10452-025-10177-y
Heidi R. Waite, Cascade J. B. Sorte
{"title":"Characteristics of positive parental effects under exposure to climate change in marine invertebrates","authors":"Heidi R. Waite, Cascade J. B. Sorte","doi":"10.1007/s10452-025-10177-y","DOIUrl":"10.1007/s10452-025-10177-y","url":null,"abstract":"<div><p>Due to the rapid rate of climate change, aquatic species might acclimate via phenotypic plasticity as a first defense. Parental effects, where the phenotype of an individual depends on the environment of its parents, could play an important role in driving population responses to climate change. Furthermore, characteristics of the species and stress exposure could be important for determining the outcome of this plasticity. Using a meta-analysis approach, we investigated the role of parental effects in allowing marine invertebrate species to cope with climate change. We summarized 107 fully-factorial sets of comparisons from 23 peer-reviewed papers that assessed how exposing parents to ambient or stressful conditions influenced responses of offspring exposed to ambient or stressful conditions. We calculated effect sizes (Hedges’ g) for these four contexts of ancestral-progeny experimental environments and collected life history information from the literature for the 20 species included in our study. We conducted subgroup analyses and meta-regressions to assess important characteristics leading to significant parental effects. We found that the level of environmental predictability between parents and offspring determined whether offspring performed better when their parents had also been exposed to stressful conditions representative of climate change. These observed parental effects were significant for species exposed to elevated CO<sub>2</sub> levels that were subtidal, sessile as adults, and had non-feeding larvae (i.e., recruit relatively locally). Understanding links between life stages, including characteristics associated with the strongest links, will aid in evaluating whether adults are likely to prime their offspring for future climates.</p></div>","PeriodicalId":8262,"journal":{"name":"Aquatic Ecology","volume":"59 2","pages":"509 - 521"},"PeriodicalIF":1.7,"publicationDate":"2025-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144074053","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Aquatic EcologyPub Date : 2025-02-06DOI: 10.1007/s10452-025-10171-4
Florencia G. Féola, Carolina Crisci, Julio C. Gómez, Angel M. Segura
{"title":"Temperature effects on the physiology, growth and survival of the apple snail Pomacea sp. (Perry, 1810)","authors":"Florencia G. Féola, Carolina Crisci, Julio C. Gómez, Angel M. Segura","doi":"10.1007/s10452-025-10171-4","DOIUrl":"10.1007/s10452-025-10171-4","url":null,"abstract":"<div><p>The energetic balance of organisms depends on the energy assimilated from food to fulfill vital functions (e.g. maintenance and somatic growth). Temperature drives the energetic balance and the performance of organisms. Evaluating the effect of temperature on multiple components is relevant to understanding the response to climate change. Here, we evaluated the thermal performance curve (TPC) for oxygen consumption (OC), ammonia excretion (AER) and ingestion rates (IR) in temperatures from 6 to 30 °C in the freshwater apple snail <i>Pomacea sp</i>. Additionally, we evaluated the evolution of somatic growth, IR and survival for <i>ca.</i> 400 days in snails exposed to fluctuating environmental temperature (OT; T range = 7–27 °C) and laboratory conditions (IT; T range = 12–19.6 °C). The TPC of OC and AER showed a unimodal pattern, with an optimum at 22 and 28 °C, respectively. IR showed a monotonic increase towards the warmest temperature (30 °C). Between ~ 15–20 °C weight increases with temperature while IR remains constant; suggesting snails invest energy mostly in growth. The final size achieved by snails in IT and OT were similar (~ 500 mg) while maximum IR was lower in IT (~ 400 mg/g.d vs ~ 800 mg/g.d of ET). Survival was similar between treatments, but growth parameters fitted by a modified Von Bertalanffy growth function with a temperature dependence on growth coefficient differed. TPC were different, which could generate mismatch between resource acquisition, assimilation and excretion affecting growth patterns. Evidence on a high capacity to deal with large thermal variability suggests adaptations of the snail to cope with climate change.</p></div>","PeriodicalId":8262,"journal":{"name":"Aquatic Ecology","volume":"59 2","pages":"419 - 433"},"PeriodicalIF":1.7,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144073936","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Diversity and distribution of aquatic insects and their relation to water quality parameters at the selected stations of the Chalakudy River, Kerala, India","authors":"Puthukkampurath Athulya, Anamika Sajeevan, Puthiyarambath Vishnu Prasad, Rajathy Sivalingam, Thavalathadathil Velayudhan Sajeev","doi":"10.1007/s10452-025-10175-0","DOIUrl":"10.1007/s10452-025-10175-0","url":null,"abstract":"<div><p>The present study assessed the diversity, distribution, and composition of aquatic insects and their relation to water quality parameters in the selected stations of the Chalakudy River. A total of 595 individuals belong to 7 orders, and 22 families were identified from the study area. Athirappilly exhibited the highest Shannon diversity (2.657) and species richness (3.374). In contrast, the lowest Shannon diversity (2.161) and species richness (2.009) were recorded at Ezhattumugham. The elevated diversity and richness at Athirappilly, coupled with sensitive taxa belonging to Ephemeroptera, Plecoptera, and Trichoptera, indicate favourable ecological conditions and minimal anthropogenic impact. Conversely, diminished diversity and richness with a lack of sensitive taxa at Ezhattumugham were attributed to deteriorated water quality. A two-way analysis of variance was performed to assess variations in physicochemical parameters between stations and seasons, revealing significant spatial and seasonal variations. Water temperature, electrical conductivity, dissolved oxygen, and biological oxygen demand exhibited statistically significant differences between stations and across seasons. Canonical correspondence analysis elucidated a significant relationship between the distribution and composition of aquatic insects and the water quality variables measured. The pre-monsoon season was characterized by a higher prevalence of tolerant taxa, while the post-monsoon season was distinguished by sensitive taxa, reflecting improved water quality. These patterns highlight the temporal fluctuations in water quality and their impact on aquatic insects. The finding emphasizes the interplay between water quality parameters and biodiversity, offering valuable insight for conservation efforts and sustainable river basin management.</p></div>","PeriodicalId":8262,"journal":{"name":"Aquatic Ecology","volume":"59 2","pages":"487 - 499"},"PeriodicalIF":1.7,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144074137","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Aquatic EcologyPub Date : 2025-01-30DOI: 10.1007/s10452-025-10176-z
Javier Sánchez-Hernández, Carlos Jiménez-Corbacho, Guillermo García‐Gómez, Ariadna García-Astillero, Ignasi Arranz
{"title":"Variations of plerocercoid infection rates in fish communities across Spanish mountain lakes","authors":"Javier Sánchez-Hernández, Carlos Jiménez-Corbacho, Guillermo García‐Gómez, Ariadna García-Astillero, Ignasi Arranz","doi":"10.1007/s10452-025-10176-z","DOIUrl":"10.1007/s10452-025-10176-z","url":null,"abstract":"<div><p>Plerocercoid infection rates in fish may result from factors influencing individual and species-specific susceptibility to procercoid infection in copepods. In this paper, we examine the infection rates of fish communities in Spanish mountain lakes by <i>Ligula</i> plerocercoids and explore potential factors that may influence the differences across 9 fish species and 13 lake systems. This study is the first to report the presence of plerocercoids in endemic Bermejuela del Esla (<i>Achondrostoma asturicense</i>), with prevalence rates ranging from 0 to 42.5%. We significantly observed low feeding intensities (gut fullness) and gonadal atrophy in infected <i>A. asturicense</i> compared to non-infected individuals, but zooplankton was absent in the gut contents of <i>A. asturicense</i>. We posit that the absence of fish-eating birds in high-altitude lakes, along with fish abundance and species-specific differences in fish foraging behaviours, likely explains the geographical variations in plerocercoid prevalence across lake-dwelling fish communities.</p></div>","PeriodicalId":8262,"journal":{"name":"Aquatic Ecology","volume":"59 2","pages":"501 - 508"},"PeriodicalIF":1.7,"publicationDate":"2025-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10452-025-10176-z.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144074201","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Aquatic EcologyPub Date : 2025-01-24DOI: 10.1007/s10452-025-10173-2
Michele Spairani, Bruno Boz, Athina Papatheodoulou, Anna Polazzo, Iakovos Tziortzis, Gerald Dörflinger, Alessandra Oggioni, Paolo Tremolada, Ayis Iacovides, Alessandro Balestrieri
{"title":"Distribution and population structure of introduced rainbow trout Oncorhynchus mykiss in Cyprus","authors":"Michele Spairani, Bruno Boz, Athina Papatheodoulou, Anna Polazzo, Iakovos Tziortzis, Gerald Dörflinger, Alessandra Oggioni, Paolo Tremolada, Ayis Iacovides, Alessandro Balestrieri","doi":"10.1007/s10452-025-10173-2","DOIUrl":"10.1007/s10452-025-10173-2","url":null,"abstract":"<div><p>Although rainbow trout <i>Oncorhynchus mykiss</i> has been widely introduced throughout Europe, self-sustaining populations are rare and unevenly distributed. In Cyprus, this invasive salmonid was introduced for recreational fishing at the end of the nineteenth century. To test whether rainbow trout have established in some water catchments of the island, between September 2020 and September 2022 we assessed the species’ distribution and analysed the age structure (by Bhattacharya’s method) and weight-length relationship of its major populations. The rainbow trout was recorded in 17 out of 86 sampling sites (19.7%), belonging to nine rivers and five catchments. Well-structured populations (N of cohorts ≥ 4) occurred in the River Kryos, where water temperatures were suitable for reproduction. Only a few individuals older than 4 years were sampled. Overall, both environmental conditions and population parameters suggest that the rainbow trout may self-sustain at least in the central, mountainous part of the island (rivers Kryos and Limnatis), where it occasionally coexists only with other introduced species. Nonetheless, its impact on native freshwater communities needs to be carefully assessed.</p></div>","PeriodicalId":8262,"journal":{"name":"Aquatic Ecology","volume":"59 2","pages":"455 - 465"},"PeriodicalIF":1.7,"publicationDate":"2025-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10452-025-10173-2.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144073826","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}