Ecology of Freshwater Fish最新文献

{"title":"Increased Survival of European Eel (Anguilla anguilla) After Retrofitting a Hydropower Plant Intake","authors":"Tormod Haraldstad,&nbsp;Knut Wiik Vollset,&nbsp;Kurt Johansen,&nbsp;Frode Kroglund","doi":"10.1111/eff.70039","DOIUrl":"https://doi.org/10.1111/eff.70039","url":null,"abstract":"<div>\u0000 \u0000 <p>The critically endangered European eel (<i>Anguilla anguilla</i>) faces major threats from hydropower turbines during downstream migration, which is a critical phase in the species' life history. To mitigate impacts on eel, engineering solutions can be implemented that enhance passage success around turbines. This study assessed the effectiveness of retrofitting the intake trash rack at Fosstveit Hydropower Plant in the River Storelva, Norway, to improve safe passage for silver eels. In 2012 and 2013, PIT-tagged eels showed high turbine mortality, with survival rates of 52% and 69%, and dead eels were observed in the tailrace. A conventional trash rack with a bottom bypass was evidently ineffective during these years. In 2024, the intake was retrofitted with a 15 mm bar spacing, low-inclined (29°α) rack guiding fish to a surface bypass. In the following years, 2024 and 2025, acoustically tagged eels released upstream the facility showed 100% survival to the river mouth. Most eels migrated during the dark hours and primarily on days with high or rising discharge, consistent with known cues. Although migration past the hydropower plant remained slower than in downstream sections, the retrofit greatly improved survival. These results support the use of inclined low bar spacing rack and surface bypasses at hydropower plants and underscore the need to address migration delays and explore adaptive flow management to support eel recovery.</p>\u0000 </div>","PeriodicalId":11422,"journal":{"name":"Ecology of Freshwater Fish","volume":"35 2","pages":""},"PeriodicalIF":1.3,"publicationDate":"2026-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145931180","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Leveraging A Spatiotemporally Large Dataset to Test Predictions of Life History Theory in Stream Fish Communities","authors":"Langston L. H. Rimmer,&nbsp;Jacob F. Schaefer,&nbsp;Melvin L. Warren","doi":"10.1111/eff.70036","DOIUrl":"https://doi.org/10.1111/eff.70036","url":null,"abstract":"<div>\u0000 \u0000 <p>Identifying the mechanisms that underlie how organisms respond to current and expected hydrologic alterations is essential to understanding the effects of climate change on riverine systems. Life history theory is one such mechanism and forms clear predictions about how traits (e.g., body size) or specific groups of traits (strategies) will be selected for by hydrological conditions. However, few researchers have tested hypotheses informed by life history theory across significant spatial and temporal scales simultaneously, or considered how selection acts on all traits or specific strategies. Our goal was to use a stream fish community dataset spanning five river basins and over two decades in the National Forests of Mississippi to test the hypothesis that (1) life history traits would be selected for by environmental conditions, and (2) that life history strategies would be selected for by hydrological conditions. To test the first hypothesis, we used a permutation procedure to compare functional beta diversity between observed and randomised datasets. To test the second hypothesis across life history strategies, we first fit beta-binomial models with life history strategy (identified through archetype analysis) as the dependent variable and predictors of streamflow as independent variables, and then identified interpretable models using model selection. Our results did not support the first hypothesis or the second hypothesis within opportunistic strategies. However, we did find evidence that equilibrium strategists were selected for by less variable hydrology. Our results fill an important data gap within the southeastern U.S. and suggest that the influence of life history traits on community structuring is not as influential within our study system as within previous studies. We hypothesise that this could be due to the lack of environmental extremes within the dataset. Future studies should expand on the current study by investigating how selection may act differentially on individual traits and life history strategies.</p>\u0000 </div>","PeriodicalId":11422,"journal":{"name":"Ecology of Freshwater Fish","volume":"35 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145824871","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mr. Mom: Nocomis Embryo-Burying Effectively Increases Embryo Survival Amidst Predation by All Mutualism Participants","authors":"Madison M. Betts,&nbsp;David C. Haak,&nbsp;Eric M. Hallerman,&nbsp;Eugene G. Maurakis,&nbsp;Emmanuel A. Frimpong","doi":"10.1111/eff.70035","DOIUrl":"https://doi.org/10.1111/eff.70035","url":null,"abstract":"<p>Nest association is a putatively mutualistic mode of reproduction utilized by many fishes of the North American freshwater family Leuciscidae. It is defined by the interaction between one ‘host’ species that builds and maintains a nest, and multiple other species of ‘nest associates’ that spawn upon it. We studied the aggregations of spawning <i>Nocomis leptocephalus</i> in order to identify potential embryo predation behaviors of the host or associates. We investigated the effectiveness of host parental care by comparing predation upon buried and unburied embryos. The main observed parental care behavior of the host—embryo burying—increased embryo survival by 26.8 (±5.6%) on average, indicating that it is an effective method of improving reproductive success. We hypothesized that both host and associates are responsible in part for embryo predation, and that nest associate abundance increased the risk of embryo predation. DNA metabarcoding of gut contents revealed that indeed both host and associates consumed heterospecific embryonic material, whereas model-based evidence suggested that associate abundance only weakly affected embryo predation rate. This work furthers and supports previous research recognizing the nuance in identifying nest association as a mutualism, and work which has suggested the host benefits from nest associates beyond the predation-dilution effect on its embryos. Here we identify an additional benefit to hosts and associates—the direct consumption of each other's embryos—making this the first study to directly investigate and demonstrate predation upon embryos by nesting fishes in this system.</p>","PeriodicalId":11422,"journal":{"name":"Ecology of Freshwater Fish","volume":"35 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/eff.70035","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145824615","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Pelagic Larval Duration and Population Structure of a Widely Distributed Amphidromous Fish in the Indo-Pacific Region","authors":"Romain Causse,&nbsp;Marion I. Mennesson,&nbsp;Nicolas Hubert,&nbsp;Frédéric Busson,&nbsp;Hadi Dahruddin,&nbsp;Daisy Wowor,&nbsp;Sopian Sauri,&nbsp;Clara Lord,&nbsp;Philippe Keith","doi":"10.1111/eff.70033","DOIUrl":"https://doi.org/10.1111/eff.70033","url":null,"abstract":"<p>Freshwater habitats in the Indo-Pacific Islands are colonised by amphidromous fish, which undergo a marine larval phase while the rest of the life cycle takes place in the riverine habitat. These fish are mainly represented by Gobiiformes. Among these, <i>Stenogobius genivittatus</i> (Valenciennes, 1837) is widely distributed in the Indo-Pacific Region, from South Africa to French Polynesia. We studied elements of the life history of <i>S. genivittatus</i> to better understand the processes contributing to its vast distribution: we analysed population genetic structure based on partial mitochondrial DNA sequences (<i>COI</i> and <i>ND6</i>) and we used otolith microstructural analysis to estimate the duration of the marine pelagic larval phase (PLD). The analysis indicates the presence of a unique population broadly distributed across the Indo-Pacific Ocean, from South Africa to French Polynesia, while individuals from Hawaii appear to constitute a potentially distinct population. Also, our results show a homogeneous PLD in the West Indo-Pacific Region, except for Hawaii where it is longer and the Central Pacific Ocean (French Polynesia and the Marquesas) where it is shorter.</p>","PeriodicalId":11422,"journal":{"name":"Ecology of Freshwater Fish","volume":"35 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/eff.70033","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145750539","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Some Like It Cold: A General Habitat Association Model for Smallmouth Bass in Stratified Lakes","authors":"Mark S. Ridgway,&nbsp;Allan H. Bell,&nbsp;Nick Lacombe,&nbsp;Krystal J. Mitchell,&nbsp;Courtney E. Taylor,&nbsp;Darren A. Smith,&nbsp;Emily D. Cowie,&nbsp;Trevor A. Middel","doi":"10.1111/eff.70034","DOIUrl":"https://doi.org/10.1111/eff.70034","url":null,"abstract":"<p>Models describing associations between fish distribution and environmental or spatial gradients at the population level have the potential to be transferrable if model parameters are stationary among populations and over years. Further, population-level habitat association models represent the scale of effect—habitat relevant to within-population distribution and processes. Here we show that for a widely recognised warm water fish species (smallmouth bass; <i>Micropterus dolomieu</i> Lacepède, 1802), habitat use extends into the metalimnion and hypolimnion of lakes. Lake depth at net sites and temperature at capture depth were used to model habitat use in a multi-lake set (<i>n</i> = 11 lakes) and for a large lake with three surveys over a decade. In the multi-lake set, a depth model was top ranked with little difference among lakes. In the lake with multiple surveys over a decade, a quadratic temperature model was top ranked but resulted in among-year differences in occupancy levels at any given temperature. The second ranked depth model produced consistent occupancy patterns with depth and matched parameter values from the multi-lake model. This consistency points to a general habitat association model based on depth for smallmouth bass during the summer season. We provide guidance for habitat managers based on this stationarity.</p>","PeriodicalId":11422,"journal":{"name":"Ecology of Freshwater Fish","volume":"35 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/eff.70034","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145686385","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Predicted Fish Vulnerability to Stream Drying in the Western U.S.A.","authors":"Elizabeth A. Rieger,&nbsp;Niall G. Clancy,&nbsp;Ryan R. McShane,&nbsp;Roy Sando,&nbsp;Annika W. Walters","doi":"10.1111/eff.70030","DOIUrl":"https://doi.org/10.1111/eff.70030","url":null,"abstract":"<div>\u0000 \u0000 <p>The frequency, magnitude and extent of stream drying is increasing due to climate change and human water demand. Fish vulnerability to increased stream drying is a combination of sensitivity (innate tolerance to low streamflow) and exposure to stream drying. To understand fish tolerance to low flow and susceptibility to decline under changing streamflow conditions, we estimated species-specific measures of sensitivity to low streamflow, determined relationships to species traits and evaluated vulnerability to future reductions in streamflow for 60 species. We found that sensitivity varied across species, and some variation was explained by life history strategy, spawning strategy and body size. Periodic life history strategy, pelagic spawning and larger size corresponded to an increased sensitivity to stream drying. Under future projections of August streamflow, 90% of sites were predicted to decrease in flow magnitude. Vulnerability to changes in streamflow, the combination of sensitivity and exposure, varied slightly across the study species, with the percent of inhospitable sites under future climate scenarios increasing for 87% of the species. Despite being relatively insensitive to low streamflow, vulnerability was high for multiple species dominant in mountainous areas, driven by high levels of exposure to stream drying. Our results illustrate the potential for species traits to predict sensitivity to low streamflow and demonstrate that exposure may play a large role when defining species vulnerability to stream drying. The ability to predict species tolerances and susceptibility to decline will become increasingly important in prioritising conservation efforts under changing environmental conditions.</p>\u0000 </div>","PeriodicalId":11422,"journal":{"name":"Ecology of Freshwater Fish","volume":"35 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145686503","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Propensity of European Grayling to Migrate Is Determined by Individual Characteristics","authors":"Ondřej Slavík,&nbsp;Marek Brabec,&nbsp;Nikola Kofentová,&nbsp;Tomáš Randák,&nbsp;Pavel Horký","doi":"10.1111/eff.70032","DOIUrl":"https://doi.org/10.1111/eff.70032","url":null,"abstract":"<p>Migrations are characterised as adaptive mechanisms aimed at improving the fitness of an individual. Hence, the propensity to migrate can be analysed by considering body size and movement activity when individuals search for available resources. We studied the relationships among individual traits, movement activity and migration of the European grayling <i>Thymallus thymallus</i> (Linnaeus 1758) in a native riverine environment during a one-year-long field study. We observed the diel movement activity of 37 individuals along the longitudinal profile of the river using radio tags with temperature sensors. The propensity to migrate differed among the tagged individuals. The fish that maintained positions over the entire annual period and whose dispersal did not exceed 2 km from their original positions were considered a stationary group. The fish migrating downstream from their summer positions to wintering positions and returning to their original positions the following year were considered a migratory group. Long-distance downstream migrations to wintering positions mostly started in early autumn, and the fish reached the farthest positions, up to 30 km apart, in December and January. Upstream migration started at the end of February and was most intensive in March and April. The highest upstream positions were reached by the graylings in summer. These findings demonstrate that fish are motivated to migrate not only to reach spawning areas in spring but also to search for food and shelter resources in summer. Over 24 h periods, the positions along the upstream–downstream axis, movement and body temperature of the migratory and stationary fish differed, indicating their distinct habitat preferences during the diel cycle. Body mass appeared to predict the migration of three-year-old females and males, with a greater migratory propensity for females than males. Our results suggest different behavioural strategies within the population of European grayling, that is, differences between stationary fish and fish migrating long distances among wintering, spawning and feeding areas.</p>","PeriodicalId":11422,"journal":{"name":"Ecology of Freshwater Fish","volume":"35 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/eff.70032","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145580944","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Invasive Eurasian Minnow Alters the Trophic Niche and Growth of Brown Trout in High-Latitude Lakes","authors":"Henna Kangosjärvi,&nbsp;Pär Byström,&nbsp;Kaisa Anttila,&nbsp;Antti P. Eloranta","doi":"10.1111/eff.70031","DOIUrl":"https://doi.org/10.1111/eff.70031","url":null,"abstract":"<p>Invasive species pose a major threat to aquatic ecosystems, particularly in high-latitude lakes which are characterised by low biodiversity. In northern Europe, the Eurasian minnow (<i>Phoxinus phoxinus</i>) has colonised lakes historically dominated by salmonids, raising concerns about the impacts of invasive cyprinids on native fish populations and food webs. We compared the trophic niche, growth, and maturation of brown trout (<i>Salmo trutta</i>) in lakes with and without minnow and assessed dietary overlap between the two species using stomach content and stable isotope analyses. Stable isotope analysis revealed that in lakes with minnow, trout exhibited more pronounced ontogenetic niche shifts from pelagic to littoral feeding and towards higher trophic positions compared to lakes with only trout. The isotope data also showed that small trout overlapped in trophic niche with minnows. Stomach content analysis revealed a shift in trout prey use, with reduced consumption of <i>Eurycercus lamellatus</i> and <i>Gammarus lacustris</i>, increased use of surface insects and a transition towards partial piscivory (prevalence of piscivory 5.5%). Despite potential resource competition at early life stages and shifts in diet, when coexisting with minnow, trout grew faster and females showed a tendency to mature earlier. Overall, the presence of invasive minnow does not appear to negatively affect native trout. This is likely due to a combination of flexible resource use and the opportunistic piscivory exhibited by trout. Since our study systems were recently invaded, the findings provide new insights into how native salmonids respond to invasive species shortly after their establishment in small high-latitude lakes.</p>","PeriodicalId":11422,"journal":{"name":"Ecology of Freshwater Fish","volume":"35 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/eff.70031","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145521800","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Editorial 2026","authors":"David C. Heins,&nbsp;Gerard Closs,&nbsp;Keith Gido,&nbsp;Nuria Sanz Ball-Ilosera,&nbsp;Asbjørn Vøllestad","doi":"10.1111/eff.70028","DOIUrl":"https://doi.org/10.1111/eff.70028","url":null,"abstract":"&lt;p&gt;&lt;i&gt;EFF&lt;/i&gt; is a journal devoted to the basic ecology of freshwater fishes, seeking to publish important research revealing or testing knowledge of ecological phenomena. &lt;i&gt;EFF&lt;/i&gt; is strongly committed to the conservation of fishes and their habitats. Although &lt;i&gt;EFF&lt;/i&gt; is not a fisheries or management journal, authors may wish to include a concise statement about the implications of their research for conservation or environmental management aiming to conserve biodiversity in the Discussion.&lt;/p&gt;&lt;p&gt;Authors are strongly encouraged to focus their reports on the phenomena studied by deemphasizing or excluding locality or taxon involved in the title, abstract and introduction and detailing them in the methods. We understand, however, that there may be cases where including the region or taxon in these sections is appropriate.&lt;/p&gt;&lt;p&gt;Authors must state clearly and succinctly the most significant results and/or conclusions of the investigation. This statement must show how the findings extend beyond the study to make a significant contribution to freshwater fish ecology and why they are of general interest to the journal's broad international readership. This information must be included before the Abstract in the main document at each submission (original and revision), but it will not be published with the article.&lt;/p&gt;&lt;p&gt;&lt;i&gt;EFF&lt;/i&gt; offers authors the option of free format submission for a simplified and streamlined submission process. Free format submission eases the process of preparing a manuscript and allows the author to complete the process faster. Authors may submit their manuscripts in the format of their choosing. &lt;i&gt;EFF&lt;/i&gt;'s publisher, Wiley, updates the formatting into the journal's style when a manuscript is accepted for publication.&lt;/p&gt;&lt;p&gt;Table 2 shows the papers cited most often in the 2-year period (2021–2022) covered by Clarivate's Journal Citation Report for June 2023. We thank the authors for their contributions to the journal and congratulate them on their achievements.&lt;/p&gt;&lt;p&gt;&lt;i&gt;EFF&lt;/i&gt; publishes special issues or contributions (special sections) drawn from proceedings of conferences and symposia. We continue to seek special issues and contributions addressing basic fish ecology, as proceedings drawn from conferences or symposia, as well as independent, stand-alone publications. If you would like to propose an idea for a Special Issue in &lt;i&gt;EFF&lt;/i&gt;, please contact the Editorial Office at &lt;span&gt;[email protected]&lt;/span&gt;.&lt;/p&gt;&lt;p&gt;The contributions of a journal to science are dependent upon the efforts of many. The Editorial Board members who help to maintain the integrity and rigor of the journal are especially important in the publication process. Reviewers who are chosen at large to assist in the process of evaluating submissions are integral to the journal's success. The Editorial Board for &lt;i&gt;EFF&lt;/i&gt; is listed in Appendix A, and the reviewers for papers reviewed July 2024 through June 2025 are listed in Appendix B. We wish to sha","PeriodicalId":11422,"journal":{"name":"Ecology of Freshwater Fish","volume":"35 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/eff.70028","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145366971","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Tribute to Asbjørn Vøllestad and Gratitude for His Contributions to Ecology of Freshwater Fish","authors":"Nuria Sanz,&nbsp;David Heins","doi":"10.1111/eff.70029","DOIUrl":"https://doi.org/10.1111/eff.70029","url":null,"abstract":"<p>As he once described himself (Vøllestad <span>2024</span>), we can imagine Asbjørn Vøllestad as a young boy growing up on a small farm on a remote island, spending his free time either reading or fishing with a simple bamboo rod. Years later, after completing his undergraduate studies in biology, he began exploring the fascinating dynamics of fish migration in his master's thesis.</p><p>In the 1980s, Asbjørn had his first contact with an international scientific journal and published his first paper—a remarkable achievement at a time when having an international focus in research was still uncommon in much of the scientific community. Since then, with nearly 200 published papers, Asbjørn has remained an active and respected member of the scientific community. Notably, he has had many very successful international collaborations, and he has served on numerous student committees, some internationally.</p><p>Asbjorn is famous for his dry wit, sensible approach to science and life, and wise counsel. Everything just seems calmer and clearer when he is in the room.</p><p>Now, as he approaches retirement and after 20 years of dedicated service as a senior editor of <i>Ecology of Freshwater Fish</i> (<i>EFF</i>, 2005–2025), Asbjørn steps down from the Editorial Board. Throughout all these years, Asbjørn has demonstrated a high level of professionalism, scientific rigour, and unwavering commitment to advancing and disseminating knowledge in the field of freshwater ecology. His editorial leadership has made a significant contribution to maintaining the journal's academic excellence and enhancing its international visibility and impact. His diligent coordination of the peer-review process, meticulous attention to content quality, and ability to foster constructive dialogue between authors and reviewers have been key to the journal's success and continued relevance in the scientific community. All those involved with the journal—fellow editors, reviewers, and Wiley staff—would like to acknowledge and express their sincere gratitude for his outstanding editorial work and unwavering commitment to the journal.</p><p>As he begins this new chapter, we hope that Asbjørn will continue to contribute to <i>EFF</i> as a valued author and reviewer, sharing his deep expertise and insight. We also hope he finds again the quiet pleasure of those childhood days—peaceful afternoons filled with reading and fishing.</p><p>Nuria Sanz wrote the original draft. Nuria Sanz and David Heins reviewed and edited the text.</p><p>The authors declare no conflicts of interest.</p>","PeriodicalId":11422,"journal":{"name":"Ecology of Freshwater Fish","volume":"35 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/eff.70029","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145366970","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}