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What do fish do after passing through a fishway? A radio-telemetry study on patrimonial holobiotic species Ecol. Freshw. Fish (IF 1.8) Pub Date : 2024-03-27 Justine Gelder, Jean-Philippe Benitez, Michaël Ovidio
The restoration of longitudinal connectivity in rivers allows fish to colonise new habitats. However, there is a lack of information regarding the behaviour of fish when they colonise the newly opened river stretch. We used manual radiotelemetry to tracked individuals belonging to four species (trout, nase, grayling and barbel) after their release upstream of two obstacles in the Amblève River. We
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Environmental correlates with fish assemblage change and biotic homogenization across 40 years in an Ozark, Gravel-Bed river basin Ecol. Freshw. Fish (IF 1.8) Pub Date : 2024-03-27 George Gavrielides, Ginny L. Adams, S. Reid Adams, Matthew H. Connolly
Fish assemblages in freshwater ecosystems are becoming more homogenous from multiple abiotic, environmental, and physicochemical variables at different scales. Historical fish collections (1976–1977) by Billy Michael Johnson and Dr. Johnson K. Beadles were compared to contemporary fish collections (2018–2019) in tributaries of the Eleven Point River basin in Arkansas to examine patterns of fish assemblage
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Shift in piscivory by salmonids following invasion of a minnow in an oligotrophic reservoir Ecol. Freshw. Fish (IF 1.8) Pub Date : 2024-03-19 Rachelle C. Johnson, Marshal S. Hoy, Karl D. Stenberg, Jonathan H. Mclean, Benjamin L. Jensen, Tessa J. Code, Carl O. Ostberg, David A. Beauchamp
Predation can play an important role in structuring ecological communities, and predator–prey dynamics can be altered following the introduction of new species. An unauthorized introduction of redside shiner (Richardsonius balteatus) into reservoirs in the Upper Skagit River, Washington, USA created concern that a consequent shift in predator–prey dynamics in the reservoirs could reduce recruitment
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Structure and vulnerability of the ichthyochory network in wetland forests of Central Amazonia Ecol. Freshw. Fish (IF 1.8) Pub Date : 2024-03-13 Gilvan Costa, Bianca Weiss, Maria Teresa Fernandez Piedade, Efrem Jorge Ferreira, Leonardo Maltchik
The interaction between fish and plants is vital for the dynamics of ecosystems since it influences plant distribution and regeneration patterns. In the floodable areas of the Amazon, these interactions are mainly structured by the flood pulse, which enables seed dispersal via water (hydrochory) and fish (ichthyochory), and which contributes to the formation of complex mutualistic networks. Our study
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Effects of predator species, composition and light environment on prey escape behaviours of invasive and native benthic fishes Ecol. Freshw. Fish (IF 1.8) Pub Date : 2024-03-13 N. O. Michels, T. R. Hrabik, A. F. Mensinger
The behaviour of two benthic species, round goby (Neogobius melanostomus) and mottled sculpin (Cottus bairdii), were examined under natural relevant downwelling light during predatory attacks by Burbot (Lota lota) and Smallmouth Bass (Micropterus dolomieu). Population declines have been observed for mottled sculpin after round goby invaded the Laurentian Great Lakes, but no data exist on prey avoidance
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Deposited sediment influences occurrence of functional traits of stream fishes Ecol. Freshw. Fish (IF 1.8) Pub Date : 2024-03-07 Mallory Hirschler, Amy Villamagna, Paul L. Angermeier, Eric Laflamme
To better understand stream‐fish sensitivity to fine sediment, we documented assemblage‐wide responses by selected traits along a sedimentation gradient. We then discuss the management implications of these ‘dose–response’ relations in the contexts of biotic assessments and conservation of sediment‐sensitive species. We identified a spatial gradient in sediment deposition among streams within the upper
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The effect of water turbidity on prey consumption and female feeding patterns in African turquoise killifish Ecol. Freshw. Fish (IF 1.8) Pub Date : 2024-03-04 Jakub Žák, Pavlína Šuhajová
Water turbidity alters prey detectability and prey selection by a predator. In dimorphic mesopredators, the effect of water turbidity on foraging success may be sex specific, primarily due to sex differences in reproductive allotment, body size and vulnerability to predation. To experimentally test the effect of turbidity on prey consumption with respect to sex, we used turquoise killifish (Nothobranchius
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The strength of density dependence on body size of young‐of‐the‐year masu salmon, Oncorhynchus masou, varies over ontogeny in Horokashubuto stream, Hokkaido, northern Japan Ecol. Freshw. Fish (IF 1.8) Pub Date : 2024-03-04 Koh Hasegawa, Jumpei Okado, Genki Sahashi, Sho Fukui, Yuhei Ogura, Kazumasa Ohkuma
The relationships between body size and density of salmonids in natural streams have been well studied, and density‐dependent growth (somatic growth) is interpreted as the principal mechanism responsible for the relationship. Moreover, the body size–density relationship is known to vary over ontogeny. However, the relationship has been studied mostly by experimental procedures (e.g. stocking fish into
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Heterogenisation of riverine ichthyofauna diversity by small hydropower dams Ecol. Freshw. Fish (IF 1.8) Pub Date : 2024-02-28 Dandhara Rossi Carvalho, Francisco Gerson Araújo
Dams modify river physical and chemical attributes. This disruption hampers fish migration, leading to the introduction of non‐native species and losses of specialised native species. Small hydropower plants (SHPs) have been suggested for replacing large dams to minimise reservoir size and preserve natural flow regimes. We evaluated the influences of two SHPs on the ichthyofauna in a tropical river
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Phenological variation in the life histories of amphidromous gobies endemic to the Hawaiian islands Ecol. Freshw. Fish (IF 1.8) Pub Date : 2024-02-26 Heidi Heim‐Ballew, Michael J. Blum, Peter B. McIntyre, Nate Bickford, J. Derek Hogan
Despite the benefits that can come from coordinated movement, many diadromous fishes have evolved partial migration strategies, where a portion of a population does not migrate. Co‐occurring life‐history variants might nonetheless gain some advantage by exhibiting congruent phenologies, with key events timed to follow the same cue. Here, we assess this possibility by examining otolith microchemistry
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Pre-impoundment fish migrations in the Mobile Basin, Alabama Ecol. Freshw. Fish (IF 1.8) Pub Date : 2024-02-26 Henry J. Hershey, Russell A. Wright, James D. Williams, Patrick E. O'Neil, Dennis R. DeVries
Assessing the status of several migratory fishes in the Mobile River Basin, Alabama, has been complicated due to a general lack of historical data on their life history, habitat requirements, and distributions. Whether distributions were restricted by natural or man-made barriers to migration is difficult to answer because few scientific collections were made before dams were built, and the earliest
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Low-head dam fragmentation, habitat alteration, and invasive predators degrade a Western United States stream fish assemblage Ecol. Freshw. Fish (IF 1.8) Pub Date : 2024-02-12 Matthew R. Haworth, Kevin R. Bestgen
Dams fragment streams, alter hydrology and habitat, and facilitate establishment of nonnative species worldwide to the detriment of native biota. Understanding and mitigating these effects to conserve and restore stream fish assemblages has relied on short- and long-term datasets to assess acute and chronic change through time, craft management strategies, and measure remediation success. We used sampling
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Instream barriers contribute to population isolation of a small-bodied, benthic, headwater-specialist fish (Percidae) Ecol. Freshw. Fish (IF 1.8) Pub Date : 2024-02-12 River A. Watson, Alexis V. Culley, Catherine G. Haase, Matthew R. Thomas, Stephanie L. Brandt, Michael A. Floyd, Rebecca E. Blanton
Genetic differentiation in aquatic systems is often driven by geographic distance (isolation by distance) due to the linear and hierarchical distribution of populations, but habitat fragmentation often exacerbates this effect by decreasing population connectivity, leading to isolation by resistance. Stronghold populations of the Kentucky Arrow Darter (Etheostoma spilotum) in the South Fork Kentucky
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Life-history connections to long-term fish population trends in a species-rich temperate river Ecol. Freshw. Fish (IF 1.8) Pub Date : 2024-02-06 Andrew J. Nagy, Mary C. Freeman, Brian J. Irwin, Seth J. Wenger
Fishes exhibit a diverse range of traits encompassing life-history strategies, feeding behaviours and spawning behaviours. These traits mediate fish population responses to changing environmental conditions such as those caused by anthropogenic stressors. The Conasauga River, located in northwestern Georgia and southeastern Tennessee, USA, hosts a diverse assemblage of over 75 species of freshwater
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Effects of hydrological and spatial seasonality on taxonomic and functional diversity of fish assemblages in an Amazonian floodplain lake Ecol. Freshw. Fish (IF 1.8) Pub Date : 2024-01-13 Severino Adriano de Oliveira Lima, Humber Agrelli Andrade, Raniere Garcez Costa Sousa
The floodplain lakes of the Amazon constitute one of the most important aquatic systems in terms of fish biodiversity. These ecosystems are influenced by the flood pulse, which in turn, affects the behaviour of fish communities within this lake ecosystem. In this study, we tested the hypothesis that the facets of taxonomic and functional diversity may be influenced by the conditions of ‘patches’ of
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Artificial light at night affects fish passage rates in two small-sized Cypriniformes fish Ecol. Freshw. Fish (IF 1.8) Pub Date : 2023-12-31 Fabio Tarena, Claudio Comoglio, Alessandro Candiotto, Daniel Nyqvist
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
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Recovery of a subtropical headwater fish community following a large flood, Klaserie River, Limpopo River System, South Africa Ecol. Freshw. Fish (IF 1.8) Pub Date : 2023-12-12 Thabo David Mohlala, Sean Murray Marr, Anthony Michael Swemmer
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
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Interactive effects of total dissolved gas supersaturation and suspended sediment on the swimming abilities of two fish species Ecol. Freshw. Fish (IF 1.8) Pub Date : 2023-12-07 Qiyu Zhang, Xiaoqing Liu, Haoran Shi, Yao Yang
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
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Spawning cohort trade-offs of reproductive time and output in cyprinid fish along an elevation gradient Ecol. Freshw. Fish (IF 1.8) Pub Date : 2023-12-07 Xingchen Liu, Chengzhi Ding, Nick Bond, Jingrui Sun, Liuyong Ding, Jinnan Chen, Juan Tao
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 Schizopygopsis thermalis
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Migratory redhorse suckers provide subsidies of nitrogen but not phosphorus to a spawning stream Ecol. Freshw. Fish (IF 1.8) Pub Date : 2023-11-28 Ryan R. Hudson, Kit Wheeler, Mack White, Justin N. Murdock
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 Moxostoma (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
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Changes in courtship prior to oviposition in chum salmon (Oncorhynchus keta) and male preference for female body size Ecol. Freshw. Fish (IF 1.8) Pub Date : 2023-11-27 Kyosuke Seki, Masaki Ichimura, Nozomi Ihara, Yuya Makiguchi
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
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Niche overlap between sympatric cichlid species of the genus Rocio (Cichliformes: Cichlidae) in Guatemala Ecol. Freshw. Fish (IF 1.8) Pub Date : 2023-11-16 César E. Fuentes-Montejo, Windsor Aguirre, Diego J. Elías, Christian Barrientos, Caleb D. McMahan
Rocio is a small genus of Neotropical freshwater fishes that is distributed in Atlantic drainages of northern Middle America. Two species of Rocio, R. spinosissima and R. octofasciata, exhibit sympatry in the Río Dulce basin in eastern Guatemala. Rocio spinosissima is endemic to the Río Dulce basin, while R. octofasciata has a larger geographic range that includes this area. Our goal was to explore
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Otolith microchemistry combined with genetics reveal patterns of straying and population connectivity in anadromous brown trout (Salmo trutta) Ecol. Freshw. Fish (IF 1.8) Pub Date : 2023-11-14 Kristi Källo, Kim Birnie-Gauvin, Henrik Baktoft, Dorte Bekkevold, Charles Lesher, Peter Grønkjær, Gry H. Barfod, Rachel Johnson, George Whitman, Malte Willmes, Justin Glessner, Kim Aarestrup
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
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Biodiversity connections—‘ties that bind’ Ecol. Freshw. Fish (IF 1.8) Pub Date : 2023-11-03 Mary C. Freeman, Duncan Elkins, Brett Albanese
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
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Editorial 2024 Ecol. Freshw. Fish (IF 1.8) Pub Date : 2023-10-26 David C. Heins, Phaedra Budy, Keith Gido, Nuria Sanz Ball-Ilosera, Asbjørn Vøllestad
1 JOURNAL IMPACT 1.1 Performance metrics Ecology of Freshwater Fish (EFF) is committed to The Declaration on Research Assessment (DORA), recognising the need to improve the evaluation of researchers and the outputs of scholarly research (https://sfdora.org/). Thus, EFF no longer presents the Impact Factor as a standalone metric. Instead, several different metrics demonstrating the quality and influence
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Freshwater fish as hosts for parasites in Australia: How much do we really know? Ecol. Freshw. Fish (IF 1.8) Pub Date : 2023-10-04 Diane P. Barton, Shokoofeh Shamsi
Australia has a highly endemic freshwater fish fauna, but basic biological knowledge for most is lacking. This includes an understanding, and description, of their parasite fauna. Additionally, the impacts of introduced fish species, and their parasites which have transferred across to native species, are also mostly unknown. This review provides the current level of knowledge of parasitic infection
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Can non-native perch (Perca fluviatilis) support native eel populations in a wetland complex? Ecol. Freshw. Fish (IF 1.8) Pub Date : 2023-09-26 Cohen Stewart, Blake Harper, Jayde Couper, Sarah J. Bury, Amandine Sabadel
It is well established that non-native fish can become invasive and outcompete and displace native fish populations. However, little research has explored the potential benefits that non-native fish may provide to native fish populations. To address this information gap, we examined how the availability of non-native perch (Perca fluviatilis) as prey could benefit populations of the endemic longfin
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Diets of invasive channel catfish are subsidized by invasive riparian trees Ecol. Freshw. Fish (IF 1.8) Pub Date : 2023-09-24 Christopher A. Cheek, Brandon K. Peoples, Reuben R. Goforth
Russian olive (Elaeagnus angustifolia) is an invasive, fruit-bearing riparian tree that dominates riparian zones of the San Juan River in the southwestern United States. Previous research in this river suggests olive fruit is common in diets of invasive channel catfish (Ictalurus punctatus), but its energetic importance is unknown (i.e. critical for catfish fitness vs. incidental consumption). We assessed
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Facilitation of benthic assemblages by Bluehead Chubs: Testing the stress-gradient hypothesis in streams Ecol. Freshw. Fish (IF 1.8) Pub Date : 2023-09-24 Isabel G. Evelyn, John C. Morse, Brandon K. Peoples
Ecosystem engineers facilitate beneficiary species by ameliorating physical habitat. The stress-gradient hypothesis (SGH) predicts the importance of facilitation in communities should increase with physical stress but has rarely been tested in freshwater. Bluehead Chubs (Nocomis leptocephalus) build gravel nests for spawning, which can reduce negative effects of sedimentation for lithophilic species
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Smolting in post-sexually mature male Atlantic salmon (Salmo salar L.) parr in the wild Ecol. Freshw. Fish (IF 1.8) Pub Date : 2023-09-24 Angus J. Lothian, Jessica Rodger, Lorna Wilkie, Marcus Walters, Richard Miller, Chris Conroy, Shona Marshall, Morven MacKenzie, Colin E. Adams
Conflicts can arise in developmental pathways that prevent an individual entering different developmental life stages that result in the expression of different phenotypes within a specific time period. In salmonids, theory suggests that sexual maturation may inhibit subsequent smolting within the same 12-month period and that this is partly the result of the time and the apparently conflicting physiological
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Detection efficiency of adult Pacific lamprey passage counts at Leaburg Dam and upstream distribution in the McKenzie River (Oregon, USA) Ecol. Freshw. Fish (IF 1.8) Pub Date : 2023-09-18 Jeremy D. Romer, Benjamin J. Clemens, Jeffrey S. Ziller, Emma Garner
Adult Pacific lamprey (Entosphenus tridentatus) were counted using consistent methodology since 2005 with a video monitoring system as they passed Leaburg Dam (McKenzie River, Oregon, USA) en route to upstream spawning areas. In this study we evaluated the detection efficiency of the video system and upstream distribution of Pacific lamprey using the video counts of lamprey passage (herein, “dam counts”)
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Do predator odours and warmer winters affect growth of salmonid embryos? Ecol. Freshw. Fish (IF 1.8) Pub Date : 2023-09-13 Karl Filipsson, Ann Erlandsson, Larry Greenberg, Martin Österling, Johan Watz, Eva Bergman
Conditions early in ontogeny can have considerable effects later on in life. Many salmonids spawn during the autumn, and temperature during subsequent embryogenesis may have far-reaching effects on life-history traits, especially when considering ongoing climate change. Even biotic conditions during embryogenesis, such as predation threat, may affect later life stages. Here, we examined how predator
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Metacommunity organisation of Amazonian stream fish assemblages: The importance of spatial and environmental factors Ecol. Freshw. Fish (IF 1.8) Pub Date : 2023-09-13 André Ribeiro Martins, Douglas Aviz Bastos, Leandro Melo Sousa, Tommaso Giarrizzo, Thiago Bernardi Vieira, Luiz Ubiratan Hepp
Metacommunity theory seeks to explain how local and regional processes contribute to the organisation of biological communities. Recent conceptual frameworks of this theory indicate that the dynamics of populations and communities are jointly established by dispersal, species responses to environmental conditions and biotic interactions dependent on species density. Here, we use hierarchical joint
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Variable diet plasticity in Eurasian perch (Perca fluviatilis): Current versus seasonal food uptake Ecol. Freshw. Fish (IF 1.8) Pub Date : 2023-08-24 Ivana Vejříková, Lukáš Vejřík, Martin Čech, Petr Blabolil, Jiří Peterka
Diet plasticity is often studied in Eurasian perch (Perca fluviatilis), a species commonly described as having generalist populations composed of specialised individuals. Perch diet was examined using gut content analysis (GCA) and stable isotope analysis (SIA), and individual specialisation was calculated in two study lakes within 2 years. Mostly only one diet category was present in the perch stomach
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Sex- and length-dependent variation in migratory propensity in brown trout Ecol. Freshw. Fish (IF 1.8) Pub Date : 2023-08-19 Edward Lavender, Yannick Hunziker, Darryl McLennan, Philip Dermond, Dominique Stalder, Oliver Selz, Jakob Brodersen
In partially migratory species, individuals either migrate at some point(s) in life or reside within their natal habitat throughout life. For salmonid fish, migration creates opportunities for feeding and growth, but it is also associated with increased mortality risk. Such trade-offs likely differ between the sexes, since reproductive output is more closely tied to body size in females than males
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Modelling migratory behaviour and habitat use of fish in a large, uninterrupted river network: A case study of a migratory salmonid Ecol. Freshw. Fish (IF 1.8) Pub Date : 2023-08-13 Rachel Chudnow, Brett van Poorten, Ray Pillipow, Ian Spendlow, Nikolaus Gantner, Scott Hinch
Bull trout (Salvelinus confluentus) research has historically focused on highly impacted systems or occurred in a reactionary manner following overharvest. Here, we used telemetry and multi-state capture–recapture modelling to inform management decision-making for this highly migratory, conservation-listed species in British Columbia's upper Fraser River watershed (UFW). Our work reduced critical information
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Native fish abundance and habitat selection changes in the presence of nonnative piscivores Ecol. Freshw. Fish (IF 1.8) Pub Date : 2023-08-13 Christopher J. Jenney, Javan M. Bauder, Scott A. Bonar
We compared abundance patterns and developed resource selection models for imperilled native southwestern (USA) fishes in the presence and absence of Black Bass (Micropterus spp.) to evaluate how fishes alter their selection for habitats when sympatric with a nonnative piscivore. We collected data using snorkel surveys and in-stream habitat sampling in Fossil Creek (AZ), upstream (native fish only)
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Effect of logged forests on diet of small characids from Neotropical streams Ecol. Freshw. Fish (IF 1.8) Pub Date : 2023-08-02 Diego Simeone
Studies relating to fish trophic ecology provide important insights regarding their life history. However, there is a lack of information linking fish diet composition with riparian cover in small streams. To investigate whether diet composition varied between streams with pristine and logged forests, I compared the food items consumed by four characid species: Bryconops melanurus, Moenkhausia collettii
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Hidden diversity and evolutionary diversification in Phalloceros harpagos Lucinda (Cyprinodontiformes: Poeciliidae) Ecol. Freshw. Fish (IF 1.8) Pub Date : 2023-08-02 Isadora Janolio de Oliveira, Nathália Alves Diamante, Thomaz Mansini Carrenho Fabrin, Augusto Frota, Weferson Júnio da Graça, Alessandra Valéria de Oliveira, Sônia Maria Alves Pinto Prioli, Alberto José Prioli
The distribution of Phalloceros species is generally allopatric and restricted; however, Phalloceros harpagos has a wide distribution and exhibits morphological variation among populations from different Brazilian river basins. Different species delimitation tests using cytochrome C oxidase subunit I gene sequences indicated that P. harpagos is a species complex that comprises between 7 and 9 phylogroups
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The influence of flow on movement of a headwater specialist in an intermittent urban headwater stream Ecol. Freshw. Fish (IF 1.8) Pub Date : 2023-08-02 Katherine Curtis, Adam Sanders, Megan Urbanic, Gabriyelle Israel, Logan Pastura, Stephen F. Matter, Michael T. Booth
Fish movement in freshwater streams is often tied to patterns of flow, especially when the stream is intermittent, flashy, or some combination thereof. Relationships between flow and fish movement are exacerbated in small urban streams in impervious surface-dominated watersheds that lead to extreme flow conditions. Here we examined the response of Creek Chub (Semotilus atromaculatus), a common pioneer
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The effect of littoral complexity on the diel distribution of early juvenile fish communities in temperate freshwater reservoirs Ecol. Freshw. Fish (IF 1.8) Pub Date : 2023-07-16 Zuzana Sajdlová, Tomáš Jůza, Vladislav Draštík, Jaromír Seďa, Martin Čech
The diel distribution of early juvenile fish communities from two temperate freshwater reservoirs that differed in cover of submerged aquatic vegetation was investigated. In the daytime, about 99.9% of the juvenile fish community from the plant-rich Žlutice Reservoir was found in the nearshore belt of submerged aquatic vegetation reaching an average abundance of ~7982 inds. 1000 m−3. In contrast, in
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Considering dispersal costs to understand fish community dissimilarity in a high-gradient basin of North America Ecol. Freshw. Fish (IF 1.8) Pub Date : 2023-07-03 Breno Laio Medeiros de Rezende, Renato Bolson Dala-Corte, Adriano S. Melo
Freshwater fish metacommunities are best understood when considering the dendritic structure of riverine networks. The dendritic structure imposes restrictions to dispersal associated with the connectivity. Many structures restrict the movement of fish even more, such as dams and the terrain slope (dispersal costs). We investigated the influence of environmental predictors and dispersal costs on the
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Food web changes reflected in age-0 piscivore diets and growth Ecol. Freshw. Fish (IF 1.8) Pub Date : 2023-07-03 Touhue Yang, Christine M. Mayer, Robin L. DeBruyne, Edward F. Roseman, Mark R. DuFour, Eric J. Weimer
Lake Erie walleye (Stizostedion vitreum) recruitment fluctuates annually and depends partially on their diet and growth during their first year of life. In recent decades, age-0 walleye diet and growth may be responding to food web changes in western Lake Erie. To determine how age-0 walleye have responded to changes in prey species and abundance, we compared diet between 2019, 2014 and 1994–1999.
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The effect of temperature on the dynamics of common bream Abramis brama migrations between the reservoir and its tributary Ecol. Freshw. Fish (IF 1.8) Pub Date : 2023-07-03 Ondřej Slavík, Nikola Pfauserová, Marek Brabec, Jitka Kolářová, Daniel Červený, Pavel Horký
An active preference for higher temperatures within a physiological optimum is beneficial for animal movement. For example, ascending temperatures induce an increase in cyprinid fish metabolism and swimming ability. Spring upstream migrations driven by the search for resources may be related to these increases. Conversely, downstream migrations in autumn follow a decrease in temperature. When fish
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Lake depth alters the trajectory of ontogenetic niche shifts in Eurasian perch (Perca fluviatilis) in small lakes Ecol. Freshw. Fish (IF 1.8) Pub Date : 2023-07-03 Ashley Trudeau, Thomas Mehner, Thomas Klefoth, Sven Matern, Robert Nikolaus, Robert Arlinghaus
The trophic niche of aquatic generalist predators is influenced by ontogeny, habitat characteristics, availability and type of prey, and competitive interactions. Many interrelated lake characteristics influence the availability of prey and may thereby impact foraging niches and the trajectory of ontogenetic niche shifts. Our work uses Eurasian perch (Perca fluviatilis) as a model species to examine
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The introduced Arapaima gigas in the Bolivian Amazon: Trophic position and isotopic niche overlap with native species Ecol. Freshw. Fish (IF 1.8) Pub Date : 2023-06-15 Danny Rejas, Thierry Oberdorff, Steven A. J. Declerck, Monika Winder
Non-native fish species may generate major ecological impacts on native assemblages. This study aims to assess the potential impact of the introduced Arapaima gigas on native fish assemblages in two oxbow lakes of the Bolivian Amazon. Stable isotope data were used to determine trophic position (TP) and isotopic niche overlap, to evaluate potential predation and competition interactions, respectively
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Abundance, cover use, and clustering of brown trout spawning redds during stream habitat rehabilitation Ecol. Freshw. Fish (IF 1.8) Pub Date : 2023-06-08 Neal D. Mundahl, Avery C. Schnaser
Abundance, placement beneath cover and clustering of brown trout spawning redds were monitored throughout five spawning seasons (2016–2020) in a 4.8-km reach of a Minnesota coldwater stream to assess the potential impacts of concurrent stream habitat rehabilitation projects. We anticipated that redd abundance (redds/100 m stream segments) and placement beneath cover (e.g. logs and branches, boulders
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Factors influencing the home range of freshwater fishes Ecol. Freshw. Fish (IF 1.8) Pub Date : 2023-06-08 Jacob Burbank, Katelyn Gao, Michael Power
Initial investigations of home range for freshwater fish noted that it scaled allometrically, with additional studies having linked home range to variations in water body size. Here, we revisit the analysis of factors influencing freshwater fish home range sizes using an expanded dataset incorporating more recent telemetry data and a meta-analysis approach to evaluate the influence of fish length,
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Fish functional biotic simplification in a Neotropical reservoir: An approach from the ichthyoplankton Ecol. Freshw. Fish (IF 1.8) Pub Date : 2023-06-05 Tatiane Mary Gogola, Pedro Rogério Leandro da Silva, Anderson Luiz Maciel, Dirceu Baumgartner, Pitágoras Augusto Piana, Paulo Vanderlei Sanches
Ecosystem services provided by communities are related to the diversity of functional traits, and biotic functional simplification occurs when this diversity is reduced. Thus, we used the approach of functional indices, applied to the abundance of fish larvae and traits of the spawning stock, to evaluate the spatial and temporal variations in the functional diversity of the fish community of a Neotropical
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Effects of temperature and heat waves on embryonic development of annual fishes from Neotropical wetlands: Implications for climate change scenarios Ecol. Freshw. Fish (IF 1.8) Pub Date : 2023-05-29 Robson Souza Godoy, Vinicius Weber, Luis Esteban Krause Lanés, Mateus Marques Pires, Cristina Stenert, Leonardo Maltchik
Climate change projections predict warmer temperatures and increased frequency of heat waves in many regions across the globe. These scenarios are expected to strongly impact temperature-dependent life-history traits of aquatic species, such as the embryonic stage of annual fishes inhabiting temporary freshwater wetlands. Here, we assessed the effects of different incubation temperatures (18, 24, 27
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Larval cisco and lake whitefish exhibit high distributional overlap within nursery areas Ecol. Freshw. Fish (IF 1.8) Pub Date : 2023-05-29 Taylor A. Brown, Lars G. Rudstam, Jeremy P. Holden, Brian C. Weidel, Amanda S. Ackiss, Ann J. Ropp, Marc A. Chalupnicki, James E. McKenna, Suresh A. Sethi
Coregonine fishes, including lake whitefish (Coregonus clupeaformis) and cisco (C. artedi), are socioecologically important in the Laurentian Great Lakes and of conservation concern, but the processes driving recruitment variability are unclear. In Lake Ontario, cisco and lake whitefish exhibit similar spawning behaviours and early life histories, but population trajectories are diverging. One hypothesis
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Environmental and spatial determinants of fish community structure in an Afro-tropical river ecosystem Ecol. Freshw. Fish (IF 1.8) Pub Date : 2023-05-09 Ogechi Nnabuchi Ugbor, Michael Osasele Omoigberale, Amien Isaac Amoutchi, Kouadio Affian, Thomas Mehner
We investigated the relative influence of local environmental and spatial factors in structuring the community composition of fish at 15 sampling sites along the longitudinal gradient of the Lower Niger River Basin (LNRB) in dry and rainy seasons using distance-based redundancy analysis and variation partitioning analysis. We collected a total of 3807 fish specimens representing 42 species. Our result
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Seasonal shifts in diel vertical migrations by lake-dwelling coastal cutthroat trout, Oncorhynchus clarkii clarkii, reflect thermal regimes and prey distributions Ecol. Freshw. Fish (IF 1.8) Pub Date : 2023-05-09 Zachary R. Thomas, David A. Beauchamp, Casey P. Clark, Thomas P. Quinn
Lakes provide important habitat for salmonids that may use them as a primary feeding area between periods of reproduction. The seasonal changes in vertical thermal structure in lakes can affect the distribution of salmonids on seasonal and diel time scales as they search for, consume, and digest prey that also exploits the water column's distribution of food, temperature and light. Our goal was to
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Flow and plankton availability control young-of-the-year fish diet in two floodplain nurseries Ecol. Freshw. Fish (IF 1.8) Pub Date : 2023-05-03 Pierre Marle, Laurent Simon, Amandine Rigal, Chloé Guicharnaud, Paul Gauthier, Noéline Garcia, Emmanuel Castella, Hélène Mayor, Vera I. Slaveykova, Jean-Michel Olivier
In large river floodplains, the availability of trophic resources to the fish fauna is highly variable as a consequence of seasonal environmental change and habitat diversity. Young-of-the-year fishes (YOY) must find suitable habitats to settle, feed and survive. However, very few in-depth studies are available about the food preferences of the young fishes during their first growing season. Here,
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Relative importance of meso- and microhabitat features in the within-reach spatial distribution of size-structured fish assemblages in small streams Ecol. Freshw. Fish (IF 1.8) Pub Date : 2023-04-26 Ágnes Maroda, Péter Sály
This study aimed to explore the relative importance of mesohabitat and microhabitat features, as well as the spatial and within-day temporal covariates, on the body size-related within-reach spatial distribution of stream-dwelling fishes in a highland-type and a sub-mountainous-type stream in Central Europe. During daytime, point abundance sampling was applied to catch the fish, and environmental data
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Long-term monitoring of pikeperch (Sander lucioperca) populations under increasing temperatures and predator abundances in the Finnish coastal waters of the Baltic Sea Ecol. Freshw. Fish (IF 1.8) Pub Date : 2023-04-23 Mikko Olin, Outi Heikinheimo, Topi K. Lehtonen, Jari Raitaniemi
The Baltic Sea has been under intense environmental changes in the recent decades, such as climate change, eutrophication and increasing abundance of top-predators, which pose serious challenges to its aquatic life. For informed conservation measures and sustainable yields, we need to understand how the populations are being affected. Accordingly, we used long-term data series (covering the period
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The occurrence of trophically transmitted parasites is influenced by the trophic level and body size of the fish host Ecol. Freshw. Fish (IF 1.8) Pub Date : 2023-04-09 Atsler Luana Lehun, João Otávio Santos Silva, Gabriela Michelan, Fernando Miranda Lansac-Tôha, Lidiany Doreto Cavalcanti, Ricardo Massato Takemoto
Endoparasites that are trophically transmitted are closely intertwined and constrained by the structure of the food chain. Each fish species can be used as an intermediate or definitive host; thus, the position it occupies in the food web and the body size can be determining factors for the presence of parasites and their transmission. Considering that fish can be parasitized by larval and adult stage
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The effects of Bythotrephes longimanus invasion on diets and growth of age-0 yellow perch in Oneida Lake, New York Ecol. Freshw. Fish (IF 1.8) Pub Date : 2023-03-30 Peter D. B. Jordan, Stephanie E. Figary, Thomas E. Brooking, Kristen T. Holeck, Christopher W. Hotaling, Anthony J. VanDeValk, Lars G. Rudstam
Bythotrephes longimanus is a predatory zooplankton native to Eurasia known for its large caudal spine. This species can decrease Daphnia abundance and may decrease growth rates of native planktivorous fish including yellow perch (Perca flavescens). Bythotrephes was first documented in Oneida Lake, USA in 2019 and reached high densities in 2020 and 2021. This recent invasion created an opportunity to