Ecology of Freshwater Fish最新文献

{"title":"Artificial light at night affects fish passage rates in two small-sized Cypriniformes fish","authors":"Fabio Tarena,&nbsp;Claudio Comoglio,&nbsp;Alessandro Candiotto,&nbsp;Daniel Nyqvist","doi":"10.1111/eff.12766","DOIUrl":"10.1111/eff.12766","url":null,"abstract":"<p>An increasing presence of instream structures such as weirs, dams, culverts and reservoirs degrades habitats, fragments rivers and blocks fish movements worldwide. Longitudinal river movements are fundamental for many fish species and the most widespread solution to restore longitudinal connectivity is the implementation of different fish passage solutions. Fishway functionality, however, is highly variable. To design a functional fishway, several aspects of the fish's interaction with its environment need to be taken into consideration. Artificial light at night (ALAN) can affect a range of different behaviours in fish, from activity and movement to feeding and predator–prey relationships. In a fish passage setting, fish are exposed to artificial light at night (ALAN) in the form of light pollution, but, sometimes, also as part of the fish passage solution. Although likely highly species specific, the effect of artificial light on fish passage behaviour has been little explored. Here we study the passage behaviour of two small-sized fish species, European gudgeon (<i>Gobio gobio</i>) and Italian riffle dace (<i>Telestes muticellus</i>), over a scaled deep side notch weir in a hydraulic flume in three different light conditions: daylight, darkness and ALAN. Although both species passed the obstacle at high efficiencies under all light conditions, their passage behaviours were influenced by light, particularly at the higher levels. While ALAN reduced passage success and resulted in delayed passage for gudgeon, riffle dace passed at higher rates under the artificial light compared to night treatment. Both results indicate a risk of negative effects from ALAN on passage performance at real fishways—or movement rates in lit areas of natural streams—for both species. Independent of light conditions, individuals of both species also passed faster after repeated trials, demonstrating learning in a fish passage context.</p>","PeriodicalId":11422,"journal":{"name":"Ecology of Freshwater Fish","volume":"33 3","pages":""},"PeriodicalIF":1.8,"publicationDate":"2023-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/eff.12766","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139133722","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":"Recovery of a subtropical headwater fish community following a large flood, Klaserie River, Limpopo River System, South Africa","authors":"Thabo David Mohlala,&nbsp;Sean Murray Marr,&nbsp;Anthony Michael Swemmer","doi":"10.1111/eff.12761","DOIUrl":"10.1111/eff.12761","url":null,"abstract":"<p>Headwaters are important refuges for threatened fishes and play an important role in their conservation. The effects of large flooding events on headwater fish assemblages are under studied in southern Africa. In January 2012, heavy rainfall resulted in a large flood in the upper Klaserie River, Olifants River, and Limpopo River System, South Africa. This flood had an estimated return level of 225 years and caused significant ecological and economic damage. This study aimed to explore the impact of a large flood on the fish assemblage and substrate in the headwaters of a subtropical stream. The fish communities and selected substrate variables were collected at 10 sites. Sites were sampled at six monthly intervals thrice before and thrice after the flood. Fish were collected by electrofishing and substrate quantified visually. Changes in habitat resulted from the flood included the scouring of gravel sand and mud, greater exposure of bedrock and boulder substrates, increased stream width, and decreased stream depth in all zones. The fish community showed an increase in abundance for all but three species, colonisation of upstream sites, and colonisation of the study area by six species. The majority of fish species have opportunistic life-history traits, which could explain the rapid colonisation and increase in abundance. The flood occurred in the middle of the breeding season for most the fish species, and this resulted in an increase of abundance for these species and provided opportunities for upstream colonisation. The impact of late season and aseasonal large floods requires further study.</p>","PeriodicalId":11422,"journal":{"name":"Ecology of Freshwater Fish","volume":"33 2","pages":""},"PeriodicalIF":1.8,"publicationDate":"2023-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139008539","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":"Spawning cohort trade-offs of reproductive time and output in cyprinid fish along an elevation gradient","authors":"Xingchen Liu,&nbsp;Chengzhi Ding,&nbsp;Nick Bond,&nbsp;Jingrui Sun,&nbsp;Liuyong Ding,&nbsp;Jinnan Chen,&nbsp;Juan Tao","doi":"10.1111/eff.12763","DOIUrl":"10.1111/eff.12763","url":null,"abstract":"<p>Understanding environmental requirements for fish reproduction in natural habitats is crucial for population conservation and restoration. However, such information is extremely scarce for the highly threatened schizothoracine fishes that cover large elevation ranges on the Tibetan Plateau. This research investigated the spawning time, output and environmental conditions of wild <i>Schizopygopsis thermalis</i> along an elevational gradient (i.e., from 1766 to 4372 m) in the upper Nu-Salween River. It found that the spawning grounds of <i>S. thermalis</i> were mainly located at elevations between 3600 and 4372 m, and spawning habitats mostly consist of still marginal areas (still water &lt;10 cm deep) with gravel substrates. Otolith microstructure analysis revealed, for the first time, that <i>S. thermalis</i> spawns in two seasons (i.e., winter: from December to next February, and spring: from April to May), with the winter spawning period generally longer than the spring spawning period. Winter spawning started earlier and ended earlier at higher elevations, while spring spawning occurred earlier at lower elevations but ended simultaneously at higher elevations. As elevation increases, reproductive output also increases, and spawning cohorts shift from winter-dominant to spring-dominant. Winter spawning cohorts were associated with lower water temperatures but higher discharges than the spring spawning cohort, and both cohorts showed elevation-related environmental preferences. Our results suggest that schizothoracine fish can adapt spawning strategies to elevation-related environmental conditions, which fill the gaps in the reproductive characteristics of schizothoracine fishes, and highlight the importance of conserving schizothoracine habitats at high elevations in the Qinghai-Tibetan rivers.</p>","PeriodicalId":11422,"journal":{"name":"Ecology of Freshwater Fish","volume":"33 2","pages":""},"PeriodicalIF":1.8,"publicationDate":"2023-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138592085","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":"Interactive effects of total dissolved gas supersaturation and suspended sediment on the swimming abilities of two fish species","authors":"Qiyu Zhang,&nbsp;Xiaoqing Liu,&nbsp;Haoran Shi,&nbsp;Yao Yang","doi":"10.1111/eff.12765","DOIUrl":"10.1111/eff.12765","url":null,"abstract":"<p>Discharged floods containing a large amount of suspended sediment (SS) can lead to total dissolved gas (TDG) supersaturation downstream of dams. The swimming ability of fish may be affected by TDG supersaturation and excessive SS. However, previous studies focused only on the separate effects of TDG and SS, ignoring their combined effects. In this study, juvenile rock carp and grass carp were selected to assess the interactive effects of TDG and SS on fish swimming ability. A totally crossed two-factorial design (six TDG levels: 100%, 115%, 120%, 125%, 130% and 135%; four SS concentrations: 0, 50, 100 and 150 mg/L) was set, and the critical swimming speed (<i>U</i>_crit) and the burst swimming speed (<i>U</i>_burst) were measured. The findings indicated that the swimming abilities (<i>U</i>_crit and <i>U</i>_burst) of both fish species decreased with increasing TDG levels and SS concentrations. Separate exposure to TDG significantly decreased the swimming abilities of the two fish species, whereas separate exposure to SS decreased only the swimming abilities of juvenile grass carp. Juvenile rock carp exhibited weaker swimming abilities than juvenile grass carp in TDG-supersaturated water. Additionally, the interaction between TDG and SS reduced the swimming abilities of juvenile rock carp and grass carp compared with a separate effect, but this reduction was significant only for the <i>U</i>_crit of juvenile grass carp. This study demonstrates that TDG-supersaturated water containing SS during flooding may result in fish failure through fishways.</p>","PeriodicalId":11422,"journal":{"name":"Ecology of Freshwater Fish","volume":"33 2","pages":""},"PeriodicalIF":1.8,"publicationDate":"2023-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138594277","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":"Migratory redhorse suckers provide subsidies of nitrogen but not phosphorus to a spawning stream","authors":"Ryan R. Hudson,&nbsp;Kit Wheeler,&nbsp;Mack White,&nbsp;Justin N. Murdock","doi":"10.1111/eff.12758","DOIUrl":"10.1111/eff.12758","url":null,"abstract":"<p>Spawning migrations of fishes are common case studies for examining the magnitude of resource subsidies; however, no studies have evaluated this phenomenon in iteroparous migrations of the Catostomid (i.e. suckers) genus <i>Moxostoma</i> (i.e. redhorses). Fish resource subsidies are usually represented as nitrogen (N) and phosphorus (P), and migratory redhorses can deliver these nutrients via excretion and eggs. We evaluated whether redhorses deliver N and P subsidies to Brasstown Creek—a fourth-order stream in the Southeastern US—during their spawning migrations. We measured individual-level nutrient contributions from excretion and eggs and extrapolated those values to estimate nutrient contributions based on daily abundances of migratory redhorses. We compared daily nutrient inputs to daily nutrient exports to determine the potential for resource subsidies. We estimated 71.6 kg of N and 4.4 kg of P were delivered to Brasstown Creek over a 98-day migration period. N input exceeded N export on 15 of the 98 days, but phosphorus input never exceeded P export. Eggs accounted for the majority of N and P input at 51% and 100% respectively. Redhorse N inputs peaked in the spring during a period of low N exports, suggesting that redhorse subsidies were delivered during times of elevated nutrient demand and relatively low nutrient availability. Suckers receive little management attention, and several species of redhorses are imperilled. Given our conclusion that redhorses provide a temporally critical N subsidy that is likely available to multiple consumers in freshwater food webs, this study provides compelling motivation for increased conservation of these species and their migrations.</p>","PeriodicalId":11422,"journal":{"name":"Ecology of Freshwater Fish","volume":"33 2","pages":""},"PeriodicalIF":1.8,"publicationDate":"2023-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139225792","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":"Changes in courtship prior to oviposition in chum salmon (Oncorhynchus keta) and male preference for female body size","authors":"Kyosuke Seki,&nbsp;Masaki Ichimura,&nbsp;Nozomi Ihara,&nbsp;Yuya Makiguchi","doi":"10.1111/eff.12762","DOIUrl":"10.1111/eff.12762","url":null,"abstract":"<p>Male chum salmon display a courtship behaviour involving an actively “quivering” against female, which is essential for female orgasm. Because generally male prefer larger female, we determined whether the elements of quivering such as the number, the amplitude, and the distance are affected by female body size. Additionally, quivering changes towards oviposition; therefore, we also identified the essential time for the male to succeed in his courtship behaviour. We conducted two experiments to measure quivering parameters: (i) measuring the number and the amplitude of quivering by the acceleration data logger and (ii) measuring the distance between sexes during quivering by observation of recorded video. From the first experiment, there was no significant relationship between the ratio of female-to-male body lengths and the number and the amplitude of quivering, while an important relationship between the body length ratio and the distance between sexes from the second experiment. Therefore, we think the distance is more significant than the number or vigour of quivering for male choice, and males quiver more closely to a larger female to increase reproductive success. In addition, when the body length ratio of the sexes is 1.01, the distance during quivering is the shortest. So, there is a possibility that the reproduction of chum salmon is based on size-assortative mating. And both experiments also showed that male quiver passively as spawning approaches. We suggest that males may not quiver actively for smooth mating as females spawning approaches.</p>","PeriodicalId":11422,"journal":{"name":"Ecology of Freshwater Fish","volume":"33 2","pages":""},"PeriodicalIF":1.8,"publicationDate":"2023-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139231664","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":"Niche overlap between sympatric cichlid species of the genus Rocio (Cichliformes: Cichlidae) in Guatemala","authors":"César E. Fuentes-Montejo,&nbsp;Windsor Aguirre,&nbsp;Diego J. Elías,&nbsp;Christian Barrientos,&nbsp;Caleb D. McMahan","doi":"10.1111/eff.12759","DOIUrl":"10.1111/eff.12759","url":null,"abstract":"<p><i>Rocio</i> is a small genus of Neotropical freshwater fishes that is distributed in Atlantic drainages of northern Middle America. Two species of <i>Rocio</i>, <i>R. spinosissima</i> and <i>R</i>. <i>octofasciata,</i> exhibit sympatry in the Río Dulce basin in eastern Guatemala. <i>Rocio spinosissima</i> is endemic to the Río Dulce basin, while <i>R</i>. <i>octofasciata</i> has a larger geographic range that includes this area. Our goal was to explore the ecological and morphological variation shown by these two closely related species and determine their differences. A combination of field work, analysis of museum specimens, and ecological niche modelling helped to better understand the differences in habitat and environmental characteristics, along with the body shape variation. Local-scale environmental data suggest that both species inhabit lentic environments, with <i>R</i>. <i>spinosissima</i> using narrower and low canopy-covered habitats and <i>R</i>. <i>octofasciata</i> inhabiting areas with a larger range of environmental characteristics. Ecological Niche Models indicated that land cover, soil, precipitation, and temperature largely define the distribution of both species. Body shape differs between species, with <i>R</i>. <i>spinosissima</i> exhibiting a rounder and deeper body while <i>R</i>. <i>octofasciata</i> is more elongated. Specimens of <i>R</i>. <i>octofasciata</i> across its distribution also show variation in head shape, mouth position, fin, and caudal peduncle characteristics, possibly as a response to trophic strategies that reduce competition. Similarities in their environments and morphologies allow us to identify broadly overlapping niches in the two species of <i>Rocio</i>, while the fine scale differences documented between species will have conservation implications for the endemic <i>R</i>. <i>spinosissima</i>.</p>","PeriodicalId":11422,"journal":{"name":"Ecology of Freshwater Fish","volume":"33 2","pages":""},"PeriodicalIF":1.8,"publicationDate":"2023-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/eff.12759","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139267472","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":"Otolith microchemistry combined with genetics reveal patterns of straying and population connectivity in anadromous brown trout (Salmo trutta)","authors":"Kristi Källo,&nbsp;Kim Birnie-Gauvin,&nbsp;Henrik Baktoft,&nbsp;Dorte Bekkevold,&nbsp;Charles Lesher,&nbsp;Peter Grønkjær,&nbsp;Gry H. Barfod,&nbsp;Rachel Johnson,&nbsp;George Whitman,&nbsp;Malte Willmes,&nbsp;Justin Glessner,&nbsp;Kim Aarestrup","doi":"10.1111/eff.12760","DOIUrl":"10.1111/eff.12760","url":null,"abstract":"<p>Salmonids are well known for their natal homing behaviour, meaning they return to breed in the same area where they originated. However, not all individuals return to their natal breeding grounds—a behavioural trait known as straying. The prevalence of straying is difficult to explore and therefore quantitative estimates for straying are seldom reported. In this study, otolith microchemistry and genetics were combined to investigate patterns of straying over ecological and evolutionary time, respectively, between neighbouring rivers flowing into Mariager fjord, Denmark. Otolith microchemistry was used to determine the river of origin for sea trout (<i>Salmo trutta</i>) upon their return to freshwater and 288 SNP markers were used to determine genetic structure among the rivers in the fjord. In this system, where the distance between rivers is short, otolith microchemistry achieved 80% accuracy in assigning juvenile brown trout to their natal river, thus allowing us to determine that approximately 43% of the adult sea trout had returned to non-natal rivers to spawn, with a similar proportion of strayers and natal homers in all of the rivers. Genetic analysis further supported that there was substantial gene flow among individuals originating from different rivers, indicating that sea trout in Mariager fjord make up one population. The findings obtained from otolith microchemistry and genetics complement each other and provide further evidence that sea trout in this system migrate to non-natal rivers and spawn there, which consequently affects the genetic structure of the population.</p>","PeriodicalId":11422,"journal":{"name":"Ecology of Freshwater Fish","volume":"33 2","pages":""},"PeriodicalIF":1.8,"publicationDate":"2023-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/eff.12760","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139277104","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":"Biodiversity connections—‘ties that bind’","authors":"Mary C. Freeman,&nbsp;Duncan Elkins,&nbsp;Brett Albanese","doi":"10.1111/eff.12756","DOIUrl":"10.1111/eff.12756","url":null,"abstract":"<p>Connectivity is a foundational concept in ecology and conservation and was the organising theme for the 2022 Annual Meeting of the Southeastern Fishes Council, a professional organisation dedicated to the study and conservation of freshwater fishes native to the southeast region of the United States (US). We introduce a Special Contribution of five papers selected from presentations at that meeting that illustrate perspectives on connections created by fish migration and dispersal, evolved life histories and habitat affinities and interspecific facilitation. Although focused on streams of the southeast US, each of these topics is broadly relevant to freshwater fish conservation, particularly with respect to causes and consequences of migratory fish depletion, population fragmentation and species declines. Many other connections relevant to the ecology and conservation of freshwater fishes remain relatively unexplored but could substantively advance conservation. We highlight the potential that species evolutionary histories, that is connections through time, reconstructed using species distributions and phylogenies may improve predictions of species responses to environmental change. Identifying species interdependencies, including undiscovered interactions that support survival or reproduction, could provide insights into how species losses may cascade as aquatic communities unravel. Finally, efforts to elucidate diverse connections between people and freshwater biodiversity, particularly where fisheries are historic and streams mostly go unnoticed, may prove essential to building public support for conservation measures. A research agenda anchored on ‘biodiversity connections’ has the potential to advance ecological understanding and public engagement, elements essential to conserving freshwater fishes.</p>","PeriodicalId":11422,"journal":{"name":"Ecology of Freshwater Fish","volume":"33 2","pages":""},"PeriodicalIF":1.8,"publicationDate":"2023-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135818874","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":"Editorial 2024","authors":"David C. Heins,&nbsp;Phaedra Budy,&nbsp;Keith Gido,&nbsp;Nuria Sanz Ball-Ilosera,&nbsp;Asbjørn Vøllestad","doi":"10.1111/eff.12757","DOIUrl":"10.1111/eff.12757","url":null,"abstract":"&lt;p&gt;After serving as Senior Editor of &lt;i&gt;EFF&lt;/i&gt; for 6 years (2017–2023), Phaedra Budy has decided to step away from the editorship to focus on her research laboratory. She previously served as a member of the Editorial Board of &lt;i&gt;EFF&lt;/i&gt; from 2010 to 2017. All those associated with the journal, both fellow editors and Wiley staff, thank Phaedra for her commitment to the journal. Phaedra will continue her contributions to the journal, however, as she will serve as Guest Editor of the forthcoming special issue devoted to proceedings of the symposium &lt;i&gt;Advances in the Population Ecology of Stream-Dwelling Salmonids VI&lt;/i&gt;.&lt;/p&gt;&lt;p&gt;In turn, we welcome Keith Gido, University of Kansas, as Senior Editor beginning January 2024. His research specialisations include the effects of invasive species and fish assemblage structure, focusing on the conservation of aquatic systems in the western and central United States. The research focuses on the impact of global change on diversity-ecosystem function relationships in streams, patterns and processes regulating species diversity and habitat associations of fishes in streams and reservoirs, and dynamics of non-coevolved fish assemblages.&lt;/p&gt;&lt;p&gt;&lt;i&gt;EFF&lt;/i&gt; publishes papers devoted to basic ecology of freshwater fishes, and &lt;i&gt;EFF&lt;/i&gt; is strongly committed to conservation. We seek to publish important research revealing or supporting knowledge of phenomena without consideration given to applications of that knowledge. As a journal publishing pure, fundamental science, &lt;i&gt;EFF&lt;/i&gt; is not a fisheries or management journal. Nonetheless, authors may wish to include a brief, concise statement about the implications of their research for ecological or environmental management aimed at the conservation of fishes or their habitats without regard to human use, which can be done in concluding the discussion.&lt;/p&gt;&lt;p&gt;Where feasible authors are strongly encouraged to focus the title, abstract and introduction of their reports on the phenomena studied by deemphasizing or excluding the locality or taxon involved and detailing them in the methods. We understand, however, that there may be cases where including the region or taxon is appropriate.&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 (2020–2021) 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 conferenc","PeriodicalId":11422,"journal":{"name":"Ecology of Freshwater Fish","volume":"33 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2023-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/eff.12757","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134908287","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}