Ecology of Freshwater Fish最新文献

{"title":"Density-dependent processes and population dynamics of native sculpin in a mountain river","authors":"Casey A. Pennock,&nbsp;Gary P. Thiede,&nbsp;Phaedra Budy","doi":"10.1111/eff.12710","DOIUrl":"10.1111/eff.12710","url":null,"abstract":"<p>Understanding the processes governing population dynamics is important for effective conservation and environmental management. Disentangling the relative role of density-dependent versus density-independent processes on population dynamics is often made difficult by the inability to control for abiotic or biotic factors, but long-term datasets are invaluable in this pursuit. We used a 14-year dataset from the Logan River, Utah, to assess long-term trends in abundance and evidence of density-dependent and density-independent effects on population dynamics of Paiute sculpin (<i>Cottus beldingii</i>) across six sites. Additionally, we evaluated the feeding ecology of sculpin over 4 years. Sculpin densities generally increased from upstream to downstream, and the annual per capita rate of increase was negatively and significantly correlated with sculpin density at four of six sites. We observed a negative relationship between total gut content and sculpin density but did not observe a negative relationship between relative condition and density. Sculpin displayed a generalist feeding strategy, and interannual differences in diet composition appeared to be influenced by interannual differences in flow, particularly years with higher magnitude flow. The observed spatial patterns in sculpin abundance throughout the watershed matched those of invasive brown trout (<i>Salmo trutta</i>), the top piscivore in the Logan River, and likely represent affinities for the suite of ecological conditions associated with downstream sections of the Logan River. Our results suggest that sculpin populations are regulated largely by density-dependent processes and match those from other studies on sculpin population dynamics including a range of species and habitats that differ vastly in abiotic conditions.</p>","PeriodicalId":11422,"journal":{"name":"Ecology of Freshwater Fish","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2023-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41950911","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":"Growth and behaviour of juvenile European eel (Anguilla anguilla) in sandy and stony bottom substrates","authors":"Roman Motyka,&nbsp;Olle Calles,&nbsp;Lovisa Lind,&nbsp;Johan Watz","doi":"10.1111/eff.12716","DOIUrl":"10.1111/eff.12716","url":null,"abstract":"<p>Understanding how the physical habitat influences growth and behaviour is essential for developing effective habitat restoration programmes of threatened and endangered fish species. In our study, we compared the growth and behaviour of juvenile European eel during 13 weeks in aquaria with either sand (0.8–2 mm) or pebbles (25–40 mm) as bottom substrate. In aquaria with the pebble substrate, eel grew significantly faster than in aquaria with sand (specific growth rate 0.15 vs. 0.11% day⁻¹). Moreover, growth rates varied more for individuals inhabiting aquaria with sand than in those with pebbles (coefficient of variation 1.26 vs. 0.67). Habitat-dependent growth rates may partly be explained by the observed differences in behavioural patterns. In aquaria with sand, eel left the substrate more often and moved close to the bottom or freely in water column. In aquaria with pebbles, eel remained hidden in the substrate to a high degree, also during feeding. These results may be important for prioritising connectivity- and habitat-restoring measures and for optimization of restocking programmes.</p>","PeriodicalId":11422,"journal":{"name":"Ecology of Freshwater Fish","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2023-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/eff.12716","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41351414","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":"Ability of grazing fish to generate particulate organic matter derived from autochthonous primary production","authors":"Shin-ichiro Abe,&nbsp;Daiki Hoshino,&nbsp;Kei’ichiro Iguchi","doi":"10.1111/eff.12715","DOIUrl":"10.1111/eff.12715","url":null,"abstract":"<p>Grazing fish play a role of controlling autochthonous primary production and converting it to secondary production by consuming benthic algae. Moreover, they will also provide autochthonous particulate organic matter (POM) for freshwater ecosystems by dislodging the benthic algal matrix while feeding. However, it has not been confirmed whether grazing fish induce POM production during their feeding on benthic algae. To verify this POM production during grazing by fish, short-term (90 min) feeding experiments were conducted by introducing grazing fish <i>Plecoglossus altivelis</i> into indoor aquaria with benthic algal mats. We found that the fish can generate POM by feeding on benthic algae. Although POM was generated in the aquaria where the fish had not grazed on the benthic algal mats at all, the concentration of POM in the aquaria increased with the frequency of the acts of scraping benthic algae by the fish. Furthermore, we observed that the fish egested faeces which corresponded to about 44% on average of the ingested benthic organic matter. In some cases, the fish generated POM that corresponded to 88% of the removed (dislodged and ingested) benthic organic matter through their feeding and defecation. This study suggested that grazing fish have a function of providing autochthonous POM to freshwater ecosystems both via dislodging benthic algae during feeding and through egestion of consumed benthic algae.</p>","PeriodicalId":11422,"journal":{"name":"Ecology of Freshwater Fish","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2023-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48150950","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":"Distribution patterns, annual density changes, growth and mortality of pikeperch [Sander lucioperca (L. 1758)] fry following oligotrophication of a reservoir","authors":"Tomáš Jůza,&nbsp;Petr Blabolil,&nbsp;Martin Čech,&nbsp;Vladislav Draštík,&nbsp;Josef Hejzlar,&nbsp;Luboš Kočvara,&nbsp;Milan Muška,&nbsp;Jiří Peterka,&nbsp;Zuzana Sajdlová,&nbsp;Michal Tušer,&nbsp;Mojmír Vašek,&nbsp;Jan Kubečka","doi":"10.1111/eff.12718","DOIUrl":"10.1111/eff.12718","url":null,"abstract":"<p>Until 2006, the Lipno Reservoir had the largest catches of pikeperch in the Czech Republic, but since 2007 it has partially collapsed. This collapse was preceded by oligotrophication, when phosphorus concentrations declined by 25%. Conservation measures from 2009 to 2015 partially improved the population from 2015, but pikeperch biomass did not reach previous levels. Unsuccessful spawning and low survival of pikeperch fry were suspected as possible reasons. Pelagic trawling for pikeperch younger juveniles in June and older juveniles in August indicated that extreme mortality in the first year of life, rather than limited spawning, was the reason for low pikeperch recruitment. Large interannual differences in pikeperch density were observed in both spring and summer, and the growth was generally low. Pikeperch fry density changed over a trophic gradient with the highest densities in the eutrophic upper reservoir parts, while differences between depths were much less pronounced due to the lack of temperature and oxygen depth stratification in summer. Oligotrophication of the reservoir in recent years is probably partly responsible for the high mortality and slow growth of pikeperch fry that are still zooplanktivorous, resulting in a lower probability of surviving their first winter. Given the changing conditions in the reservoir, measures should be taken to strictly conserve populations to maintain self-sustaining pikeperch populations in the Lipno Reservoir.</p>","PeriodicalId":11422,"journal":{"name":"Ecology of Freshwater Fish","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2023-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49164092","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":"Smallmouth bass (Micropterus dolomieu) suppress Atlantic salmon (Salmo salar) feeding activity and increase aggressive behaviours at warmer temperatures","authors":"Nicole C. Ramberg-Pihl,&nbsp;Amanda J. Klemmer,&nbsp;Joseph Zydlewski,&nbsp;Stephen M. Coghlan Jr.,&nbsp;Hamish S. Greig","doi":"10.1111/eff.12711","DOIUrl":"10.1111/eff.12711","url":null,"abstract":"<p>By 2050, mean temperature in the state of Maine, located in the Northeastern USA, is expected to increase nearly 1°C, which could directly affect native coldwater salmonid behaviour and increase competition with warmwater smallmouth bass. We conducted a microcosm experiment to examine the feeding and agonistic behaviour of endangered juvenile Atlantic Salmon (<i>Salmo salar</i>) at two temperatures (18 and 21°C) in the presence and absence of non-native Smallmouth Bass (<i>Micropterus dolomieu</i>). By visually reviewing footage of fish competition in our tanks, we quantified feeding and agonistic interactions. We predicted salmon would exhibit lower feeding activity than bass at 21°C and antagonistic interactions between the two species would increase with warming. We found salmon feeding activity was reduced by smallmouth bass presence and this effect was stronger at 21°C. We also found smallmouth bass aggression was strongest at 21°C when salmon were present. Lastly, feeding activity and aggression in both species changed with food availability. These findings illustrate the potential for invasive warmwater species to outcompete native salmonids for resources, especially under the warmer conditions predicted by climate change scenarios.</p>","PeriodicalId":11422,"journal":{"name":"Ecology of Freshwater Fish","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2023-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42377054","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":"Unlocking the genome of perch – From genes to ecology and back again","authors":"Anti Vasemägi,&nbsp;Mikhail Ozerov,&nbsp;Kristina Noreikiene,&nbsp;María-Eugenia López,&nbsp;Anna Gårdmark","doi":"10.1111/eff.12713","DOIUrl":"10.1111/eff.12713","url":null,"abstract":"<p>Eurasian perch <i>Perca fluviatilis</i> has been a popular model species for decades in the fields of aquatic ecology, community dynamics, behaviour, physiology and ecotoxicology. Yet, despite extensive research, the progress of integrating genomic perspective into existing ecological knowledge in perch has been relatively modest. Meanwhile, the emergence of high-throughput sequencing technologies has completely changed the methods for genetic variation assessment and conducting biodiversity and evolutionary research. During the last 5 years, three genome assemblies of <i>P. fluviatilis</i> have been generated, allowing substantial advancement of our understanding of the interactions between ecological and evolutionary processes at the whole-genome level. We review the past progress, current status and potential future impact of the genomic resources and tools for ecological research in Eurasian perch focusing on the utility of recent whole-genome assemblies. Furthermore, we demonstrate the power of genome-wide approaches and newly developed tools and outline recent cases where genomics have contributed to new ecological and evolutionary knowledge. We explore how the availability of reference assembly enables the efficient application of various statistical tools, and how genomic approaches can provide novel insights into resource polymorphism, host–parasite interactions and to genetic and phenotypic changes associated with climate change and harvesting-induced evolution. In summary, we call for increased integration of genomic tools into ecological research for perch, as well as for other fish species, which is likely to yield novel insights into processes linking the adaptation and plasticity to ecosystem functioning and environmental change.</p>","PeriodicalId":11422,"journal":{"name":"Ecology of Freshwater Fish","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2023-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/eff.12713","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45130855","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 87Sr/86Sr identifies natal origin, movement and life history of Burbot Lota lota in the Kootenai River following 45 years of impoundment","authors":"James L. Dunnigan,&nbsp;Timothy J. Linley,&nbsp;Jill M. Janak,&nbsp;Megan K. Nims,&nbsp;Lysel Garavelli,&nbsp;Geoffrey A. McMichael","doi":"10.1111/eff.12712","DOIUrl":"https://doi.org/10.1111/eff.12712","url":null,"abstract":"<p>Hydropower has long been an effective form of renewable energy, but the development of the resource has negatively impacted fishes throughout the world. Formulating recovery plans to mitigate these effects requires a firm understanding of species-specific provenance, life history and life stage habitat requirements. However, the importance of this information is often only recognised after a substantial population decline, when obtaining it becomes demographically challenging. We provide a case study for this scenario and present a post hoc approach to gain insight into these critical data gaps for Burbot <i>Lota lota</i> in the upper Kootenai River in Montana and British Columbia. The population once supported a robust tribal and recreational harvest but declined following impoundment and these fisheries have remained closed or curtailed for nearly 20 years. The reasons for the decline are unknown and actions to assist recovery have been constrained by limited information regarding natal origin, life history and habitat use. We addressed this issue using strontium isotope ratios (⁸⁷Sr/⁸⁶Sr) in otoliths collected over four decades in Lake Koocanusa, the reservoir on the Kootenai River above Libby Dam. Due to the geologic heterogeneity of the basin and resulting variation in water ⁸⁷Sr/⁸⁶Sr, the assignment probability for Burbot to their region of natal origin approached unity. Otolith ⁸⁷Sr/⁸⁶Sr also indicated the population was comprised of mainstem- and tributary-origin forms and their relative abundance changed over time. Mainstem Burbot was most abundant during the 1970s and 2000s, whereas tributary forms dominated between these periods. We suggest ecosystem changes following impoundment contributed to this shift in life history forms and the overall decline of the population. Our findings underscore the need for additional investigations of these impacts to guide restoration efforts.</p>","PeriodicalId":11422,"journal":{"name":"Ecology of Freshwater Fish","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2023-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/eff.12712","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50125028","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":"Ensemble modelling of Pirarucu (Arapaima gigas) distribution in biodiversity hotspot to understand its invasion risk","authors":"Mohamed Nisin K.M.N.,&nbsp;Sreenath K. Ramanathan,&nbsp;Miriam Paul Sreeram,&nbsp;Deepa Sudheesan","doi":"10.1111/eff.12704","DOIUrl":"10.1111/eff.12704","url":null,"abstract":"<p>Invasive species pose a severe threat to biodiversity around the world. Managing the consequences of invasion is difficult in aquatic settings, as the rate at which invaders establish typically outpaces the resources available to eradicate them. For proactive management measures to be implemented, prior knowledge of the probability of invasion is required. In this study, we created a spatial model of the probability of the Pirarucu (<i>Arapaima gigas</i>) invasion in the Western Ghats. The Western Ghats, one of the world's top biodiversity hotspots, is home to numerous endemic species, many of which are now threatened. An ensemble modelling approach using 10 models, including machine learning techniques such as Artificial Neural Network (ANN), Maximum Entropy (MaxEnt), Random Forest (RF), Generalised Boosted Regression Model (GBM) and Classification Tree Analysis (CTA), was adopted. The model was built using the species' occurrence data and nine climate variables. The findings revealed that southern regions of the Western Ghats have a high risk of Pirarucu invasion. Sri Lanka also has a much greater geographical area with a higher percentage of appropriate habitats for the species. The study becomes vital as this exotic species was repeatedly reported from the rivers since the extensive floods in the region in 2018. The developed model will assist managers in prioritising locations and initiating monitoring and management steps to prevent the spread before they establish in the wild. With earlier Pirarucu invasions in Bolivia, Peru and East Asia and recent climatic vagaries in the Western Ghats, the native biodiversity of the region is in grave danger of being displaced.</p>","PeriodicalId":11422,"journal":{"name":"Ecology of Freshwater Fish","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2023-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41678010","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":"Influence of habitat on abundance, size and growth rate of pikeperch (Sander lucioperca) 0+ juveniles in a canyon-shaped reservoir","authors":"Petr Blabolil,&nbsp;Jiří Peterka,&nbsp;Martin Čech,&nbsp;Tomáš Jůza","doi":"10.1111/eff.12709","DOIUrl":"10.1111/eff.12709","url":null,"abstract":"<p>Abundance, size (standard length, <i>L</i>_S) and growth rate of early pikeperch (<i>Sander lucioperca</i>) 0+ juveniles were monitored in the epipelagic and bathypelagic layers near the dam, and in the middle and upper sections at the canyon-shaped Římov Reservoir (Czech Republic) during the day on 26 and 29 May, and during the night on 5 and 11 June in 2008. The greatest abundance of 0+ fish was observed in the middle section of the reservoir and their <i>L</i>_S increased upstream from the dam towards the reservoir's tributary. Moreover, larger and older pikeperch 0+ juveniles migrated to the bathypelagic layer during the day. The epilimnetic temperature and productivity (expressed as chlorophyll-<i>a</i> concentration) gradients were suggested as the main drivers affecting the distribution and growth of the fish.</p>","PeriodicalId":11422,"journal":{"name":"Ecology of Freshwater Fish","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2023-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45514311","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":"Predicting riverine fish production using empirical models and the metabolic theory of ecology","authors":"Ian A. Richter,&nbsp;Nicholas E. Jones,&nbsp;Donald A. Jackson","doi":"10.1111/eff.12708","DOIUrl":"10.1111/eff.12708","url":null,"abstract":"<p>Fish production integrates many different measures of community performance, such as abundance, biomass, growth, and reproduction, into one valuable quantitative metric but requires resource intensive data for empirical estimation. While published empirical models and the metabolic theory of ecology (MTE) represent alternative methods to estimate fish production, few studies have focused on productivity models for stream fish assemblages. The goal of our study was to determine whether existing empirical models and elements of the metabolic theory of ecology can reliably estimate stream fish productivity. We used production estimates from the literature (<i>n</i> = 107) to parameterize models based on the metabolic theory of ecology and new estimates of stream fish production from North America (<i>n</i> = 78) to compare and validate all models. Using major axis regression, we determined that while all models had strongly correlated production estimates relative to the observed values (<i>r</i>² range: [0.496, 0.815]), not all the models produced accurate estimates. The MTE model with the temperature component had a poorer predictive performance (RMSE = 0.502) relative to models based solely on allometric scaling (RMSE range: [0.299, 0.380]). We conclude that standard production models can generate relative estimates of production using general fish sample data, however, the accuracy and precision of the estimates can vary among the models. Our study highlights the need for productivity estimates for stream fish assemblages from different geographic regions, to test empirical models with novel datasets, and for further investigation of temperature effects on fish productivity.</p>","PeriodicalId":11422,"journal":{"name":"Ecology of Freshwater Fish","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2023-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/eff.12708","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43198724","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}