Ecology of Freshwater Fish最新文献

{"title":"Interactive Effects of Anthropogenic Stressors on the Temporal Changes in the Size Spectrum of Lake Fish Communities","authors":"Valentin Marin,&nbsp;Julien Cucherousset,&nbsp;Gaël Grenouillet","doi":"10.1111/eff.12826","DOIUrl":"https://doi.org/10.1111/eff.12826","url":null,"abstract":"<p>The size spectrum represents a powerful approach for quantifying the effects of environmental changes from individuals to communities in aquatic ecosystems. However, our understanding of its temporal stability in freshwater ecosystems is still limited. In the present study, we used a size spectrum approach to investigate the responses of 126 lake fish communities to changes in the intensity of three common anthropogenic stressors (i.e., global warming, nutrient loading and biological invasions) in French natural lakes and reservoirs over an average 5-year time period. Using a backward selection on a full model including all possible effects of stressors on the size spectrum slope, we demonstrated that (i) increasing summer temperature shifted fish abundance towards the largest size classes, resulting in a flatter size spectrum slope and (ii) nutrient loading and biological invasions were associated with a shift towards smaller size classes in natural lakes, while the opposite effect was observed in reservoirs. In addition, these two stressors interacted in determining changes in the size structure of fish communities, complicating what the size spectrum can reveal about changes in stressor intensity during monitoring programs. All predictors accounted for a limited part of the observed changes in size spectra, and further investigations are needed to fully apprehend the interplay between natural and human-induced drivers of the temporal changes in size spectra in contrasting environmental conditions.</p>","PeriodicalId":11422,"journal":{"name":"Ecology of Freshwater Fish","volume":"34 2","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/eff.12826","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143114156","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 2025","authors":"David C. Heins,&nbsp;Keith Gido,&nbsp;Nuria Sanz Ball-Ilosera,&nbsp;Asbjørn Vøllestad","doi":"10.1111/eff.12825","DOIUrl":"https://doi.org/10.1111/eff.12825","url":null,"abstract":"&lt;p&gt;While reviewing the progress of the journal, we decided to require authors to state the significance of their findings for readers of EFF. Beyond having authors focus on the justification for submitting their research to EFF, this new requirement should aid editors and reviewers in evaluating submitted manuscripts. Manuscripts submitted without the statement will be returned to the authors for completion prior to editorial and peer review. The requirement is described below and in the Author Guidelines.&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, testing, 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 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 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 two-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. In the October 2024 issue (33:4), &lt;i&gt;EFF&lt;/i&gt; published proceedings from the international symposium &lt;i&gt;Advances in the Population Ecology of Stream-Dwelling Salmonids VI&lt;/i&gt;. 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 r","PeriodicalId":11422,"journal":{"name":"Ecology of Freshwater Fish","volume":"34 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/eff.12825","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143114158","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":"In Situ Videography Quantifies Temporal and Spatial Variation in Prey Consumption and Energy Intake by Stream-Dwelling Bull Trout (Salvelinus confluentus)","authors":"Zane C. Stephenson,&nbsp;Ernest R. Keeley","doi":"10.1111/eff.12824","DOIUrl":"https://doi.org/10.1111/eff.12824","url":null,"abstract":"<div>\u0000 \u0000 <p>In stream ecosystems, invertebrates are a principal source of prey for many fishes, but their abundance as a food source depends on the predator's ability to exploit them in time and space. Although salmonid fishes are commonly thought of as daytime drift-feeding predators of invertebrates in streams, they exhibit great flexibility in foraging behaviour and may also consume prey from the benthos and at night. Char species, (<i>Salvelinus</i> sp.), in particular, may be better adapted to forage under low light conditions due to greater scotopic sensitivity than other salmonids. In this study, we used in situ or in place videography to quantify the foraging behaviour of bull trout (<i>Salvelinus confluentus</i>) and determine when and where they capture prey. We found that bull trout were primarily daytime predators of invertebrates drifting in the water column, and that they rarely captured prey from the benthos or foraged at night. We did observe size-related differences and seasonal declines in foraging rate from summer to fall months. A modelled estimate of energy intake indicates that daytime drift-feeding by small size classes of bull trout was above that needed for a maximum daily ration under a range of assumptions about prey size and prey retention rates. Energy intake rates for larger fish were more dependent on assumptions of preferred prey size and prey retention rates. Our data indicate that daytime measures of invertebrate drift abundance and size are the most inclusive measure of food abundance for stream-dwelling bull trout.</p>\u0000 </div>","PeriodicalId":11422,"journal":{"name":"Ecology of Freshwater Fish","volume":"34 2","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143112526","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":"Correction to ‘The influence of flow on movement of a headwater specialist in an intermittent urban headwater stream’","authors":"","doi":"10.1111/eff.12812","DOIUrl":"https://doi.org/10.1111/eff.12812","url":null,"abstract":"<p>Curtis, K., Sanders, A., Urbanic, M., Israel, G., McCombs, C., Pastura, L., Matter, S. F., &amp; Booth, M. T. (2024). The influence of flow on movement of a headwater specialist in an intermittent urban headwater stream. <i>Ecology of Freshwater Fish</i>, 33, e12744. https://doi.org/10.1111/eff.12744</p><p>In the originally published article, co-author Connor McCombs was inadvertently left off the author list. The correct author list is as follows:</p><p>Katherine Curtis, Adam Sanders, Megan Urbanic, Gabriyelle Israel, Connor McCombs, Logan Pastura, Stephen F. Matter and Michael T. Booth</p><p>Department of Biological Sciences, University of Cincinnati, Cincinnati, Ohio, USA</p><p>This has been corrected in the online version of the article.</p><p>We apologise for this error.</p>","PeriodicalId":11422,"journal":{"name":"Ecology of Freshwater Fish","volume":"33 4","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/eff.12812","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142555345","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":"Small Streams Support Beta Diversity in Neotropical Fish Assemblages in the Upper Paraná River Basin","authors":"Renner Fernando da Silva Córdova Junior,&nbsp;Fabiane Silva Ferreira,&nbsp;Henrique Lopes Ledo Pinho,&nbsp;Alessandro Minillo,&nbsp;Elaine Antoniassi Luiz Kashiwaqui,&nbsp;Yzel Rondon Súarez","doi":"10.1111/eff.12819","DOIUrl":"https://doi.org/10.1111/eff.12819","url":null,"abstract":"<div>\u0000 \u0000 <p>Variation in species composition along an environmental gradient (β-diversity) can inform our understanding of biodiversity patterns and species composition. Beta diversity can be partitioned into species contributions to beta diversity (SCBD) and local contributions to beta diversity (LCBD). While SCBD describes the variations in species composition among samples, LCBD measures the uniqueness of a biological community within a larger ecosystem. Recently developed metrics enabled the estimation of species contribution to total beta diversity (SCBD) and the contribution of individual sites to total beta diversity (LCBD). Utilising these metrics, a one-time survey of 275 sampling points within four sub-basins of the Upper Paraná River Hydrographic Basin (low-flow streams, &lt; 5 m³/s) was conducted to assess fish community composition. Our results show that limnological influences at different scales contribute to higher LCBD. However, land use and species richness were not directly linked to this outcome, suggesting that sites with fewer fish species along sub-basins contributed to higher beta diversity. It was concluded that beta diversity is more influenced by limnological characteristics and the position of sampling sites along the longitudinal gradient than that based on variations in species composition (SCBD). Moreover, high LCBD values were even found in portions of the gradient with lower species richness. This means that small streams in the sub-basins of the upper Paraná River are unique and are comprised of varied habitats that contribute to increasing diversity. As such, they should be seen as a target in the development of environmental policies designed to conserve their pristine condition.</p>\u0000 </div>","PeriodicalId":11422,"journal":{"name":"Ecology of Freshwater Fish","volume":"34 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143120108","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":"Effect of Temperature on Black Carp (Mylopharyngodon piceus) Age at Sexual Maturity","authors":"Jiayi Wu,&nbsp;Kim Cuddington","doi":"10.1111/eff.12823","DOIUrl":"https://doi.org/10.1111/eff.12823","url":null,"abstract":"<p>Black Carp (<i>Mylopharyngodon piceus</i>) is one of the four invasive Asian Carp species (Bighead Carp, <i>Hypophthalmichthys nobilis</i>; Grass Carp, <i>Ctenopharyngodon idella</i>; and Silver Carp, <i>Hypophthalmichthys molitrix</i>) in North America. As benthic predators, Black Carp poses ecological risks to unionids within the Great Lakes and could bring other changes to local benthic communities. One means of assessing invasion risk and potential impact is to determine how critical life history characteristics depend on environmental conditions in new regions. Age at sexual maturity is negatively correlated to the maximum per capita population growth rate and thus can be used to estimate potential population growth for invasive species. Previous studies have found a significant negative relationship between age at maturity and temperature for all three other Asian Carp species, but not for Black Carp. With a more comprehensive dataset, we demonstrate that the same relationship exists for Black Carp. Winter duration is the best predictor of Black Carp age at maturity, followed by average winter air temperature. This significant relationship between age at maturity and temperature was not altered in artificial growing environments. Our results suggested that for Black Carp, temperatures in the winter months are more important for its energy accumulation and maturation and may determine invasion risk in northern locations, such as tributaries of the Great Lakes.</p>","PeriodicalId":11422,"journal":{"name":"Ecology of Freshwater Fish","volume":"34 2","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/eff.12823","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143117623","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":"Downstream Migration Success of Atlantic Salmon Smolts in a River Catchment Highly Fragmented by Hydroelectric Impoundments","authors":"Jessica R. Rodger,&nbsp;Phoebe Kaiser-Wilks,&nbsp;Samantha V. Beck,&nbsp;Jamie C. H. Ribbens,&nbsp;Angus J. Lothian,&nbsp;Colin E. Adams","doi":"10.1111/eff.12821","DOIUrl":"https://doi.org/10.1111/eff.12821","url":null,"abstract":"<p>Riverine habitat fragmentation by barriers, including impoundments, is common and their effects on obligate aquatic organisms are manifold. Organisms, such as Atlantic salmon (<i>Salmo salar</i>), that make extensive river migrations are particularly vulnerable to the effects of impoundments. In this study, we use acoustic telemetry to examine the migratory behaviour of Atlantic salmon, as they migrate to sea for the first time as juvenile ‘smolts’, in a river with a series of dams that form a complex hydropower scheme. We demonstrate that overall migration success in the River Dee catchment and particularly through standing waters was remarkably high. We speculate that high migration success in standing waters could be due to relative current speeds providing good quality directional cues to migrants. Migration success past the two dams in this study, was relatively high, although the number of unsuccessful passage attempts before a successful passage was also very high. The vast majority of smolts passed the dams when the turbines were operational. At one dam, smolts did not use an available fish pass but migrated through the generating turbines. These findings provide several routes through which generation could be managed to enhance the success of downstream smolt migration in rivers where there are similar patterns of hydrogeneration in place.</p>","PeriodicalId":11422,"journal":{"name":"Ecology of Freshwater Fish","volume":"34 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/eff.12821","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143114661","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":"Introduction to the Proceedings of the Sixth ‘Advances in the Population Dynamics of Stream Salmonids’ Symposium","authors":"Phaedra Budy,&nbsp;L. Asbjørn Vøllestad","doi":"10.1111/eff.12820","DOIUrl":"https://doi.org/10.1111/eff.12820","url":null,"abstract":"<p>In May of 2023, about 100 scientists met for the sixth time over ~25 years for the ‘Advances in the Population Dynamics of Stream Salmonids’ Symposium. This symposium, created by the father of brown trout ecology, Dr. Javier Lobón-Cerviá and colleagues, grew out of intriguing conversations regarding the regulation of the population dynamics of salmonids, as long ago as the 1980s. The first symposium was in the quaint coastal town of Luarca, Spain, in 1998 and started out small with less than ~50 scientists in attendance. The second symposium, also more modest in numbers (~85 scientists), was held in 2006 in millenary Leon in the NW of Spain, a town proud of its history and its Cathedral of nearly 2000 square metres of stained glass and in-credible (free!) tapas. The third was in 2010 back in the stunning fishing town of Luarca, where our numbers grew substantially to more than 115, we moved into a fancy new conference hall, and we feasted on fresh seafood. The fourth was in 2015 and held in Girona (101 scientists), in the NE of Spain, where we all felt ethereal while giving our talks in a stunning cathedral-like hall and where we experienced the strong Catalonian culture and cuisine. This was followed by a meeting in Granada, Spain, in 2019, where we strolled the halls and gardens of the magnificent Alhambra after riveting days of science talks.</p><p>Finally, in May of 2023, we met in lovely and lively Majorca, one of Spain's Balearic Islands in the Mediterranean, and convened at the University of Balearic Islands. We ate delicious foods, as Majorca has many cultural influences, and toured a magnificent cave, where we were serenaded by live classical music. We met with old friends and new friends and shared new experiences, and our numbers of participants grew yet again. Topics covered included the roles of tributaries, influences on growth rates, recruitment, dispersal and migration, genetics, spawning, habitat, innovative conservation, restoration and management, habitat, and even beer and salmon, to name just a few. At each iteration, we have received new fresh faces and perspectives, but our alumni base has held strong, offering continuity in the advancement of the study of the population dynamics of stream salmonids.</p><p>Selected proceedings from the May 2023 Majorca symposium follow. The articles cover a wide range of topics, from eco-evolutionary dynamics to how to measure biologically relevant temperature in fish, for example. In this way, these proceedings show the importance of understanding and studying stream living salmonids at a wide range of scales.</p><p>P.B. and L.A.V. both equally conceived of and wrote this short introduction.</p><p>The authors declare no conflicts of interest.</p>","PeriodicalId":11422,"journal":{"name":"Ecology of Freshwater Fish","volume":"33 4","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/eff.12820","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142555435","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":"Patterns of Ecological Specialisation Among Multiple Piscivorous Morphs of a Diverse Assemblage of Salvelinus Fishes","authors":"Evgeny V. Esin,&nbsp;Fedor N. Shkil,&nbsp;Elena V. Shulgina,&nbsp;Yulia A. Baskakova,&nbsp;Grigorii N. Markevich","doi":"10.1111/eff.12818","DOIUrl":"https://doi.org/10.1111/eff.12818","url":null,"abstract":"<div>\u0000 \u0000 <p>Adaptive radiation is considered to be a major source of biodiversity in charrs of the genus <i>Salvelinus</i>. These fishes demonstrate numerous examples of diversification in postglacial lakes and rivers resulting in the emergence of different ecomorphs, including piscivorous. Usually, the number of fish feeders does not exceed two, suggesting the existence of ecological and/or internal factors that prevent further diversification. Under these circumstances, rare instances of increases in the number of piscivorous morphs are of particular interest. Here, we present a comprehensive study of the piscivorous charr assemblage in Lake Kronotskoe, residence of the most diverse species flock of <i>Salvelinus</i> fishes. To unravel the diversity and ecological relationships of piscivorous charrs, we analysed their morphology and microsatellite DNA polymorphism, distribution within the lake, trophic preferences and parasite load, as well as trace element accumulation, stable isotope and free fatty acid ratios. We revealed that, apart from a few strictly benthivorous morphs, the lake is inhabited by four closely related but morphologically and genetically distinct morphs that exhibit a range of piscivorous specialisation: from opportunistic secondary predation to ultra-specialised primary piscivory. They effectively exploit the spatiotemporal structure of the ecosystem and experience diversifying selection due to niche discordance. Each piscivorous morph develops specific phenotypic, ecological and life history traits that allow it to terminate weakly overlapping branches of the trophic chain and share the energy flows of the lake ecosystem. Our data suggest that Lake Kronotskoe facilitates high level of ecological opportunity that favours niche expansion and allows the piscivorous lineage to simultaneously realise the archetypical modes of ecological diversification available to fishes in cold-water freshwaters.</p>\u0000 </div>","PeriodicalId":11422,"journal":{"name":"Ecology of Freshwater Fish","volume":"34 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143120689","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":"Invasive Cichlids Display Higher Aggression During Nest Defence Compared to the Native Mexican Mojarra","authors":"Marco Franco,&nbsp;Elsah Arce","doi":"10.1111/eff.12815","DOIUrl":"https://doi.org/10.1111/eff.12815","url":null,"abstract":"<div>\u0000 \u0000 <p>Nest defence is one component of parental investment by which individuals can increase the survival of their offspring. Aggressive behaviours and the time spent protecting nests are determining factors in the reproductive success of cichlid species. The Mexican mojarra is the only cichlid native to the Balsas River Basin in Mexico. At least four invasive cichlids have been introduced, including the convict cichlid and the spotcheek cichlid. These three species establish their nests in the River and defend them aggressively. We quantified the number of nests, aggressive behaviours and time spent in the nest by parents of the native species and these two invasive species. We expected that the invasive parents would be more aggressive during defence, spent more time protecting the eggs, and would have a higher density of nests. We also explored differences in nest defence between the sexes within each species. We found that invasive cichlids had a greater number of nests than the Mexican mojarra. In the two invasive species, there was no difference between males and females in the time spent in the nest or the number of aggressive behaviours. In contrast, male Mexican mojarras spent less time in the nest and performed fewer aggressive behaviours than their mates. The smaller number of nests and nest defence behaviour of this native species could compromise its reproductive success and population size. This differential nest defence between the Mexican mojarra and the invasive cichlids could have negative implications for the physiology, reproduction, and health of this native cichlid.</p>\u0000 </div>","PeriodicalId":11422,"journal":{"name":"Ecology of Freshwater Fish","volume":"34 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143117768","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}