Find research datasets worth reusing
Search datasets from major research repositories and use ShareScore to quickly assess how well each record supports discovery, access, and reuse.
1,017
datasets available to search
ShareScore release 0.7.1
Dataset results
1,017 results for “freshwater fish”
Regional IUCN Redlist for Freshwater and Diadromous Fishes of Great Britain (England, Scotland and Wales)
<p>A regional IUCN redlist assessment of extinction risk for freshwater and diadromous fishes in Great Britain, including assessments for Engand, Scotland and Wales. The dataset comprises summary data for assessments under Criteria A-E and narratives to support the the assessment of all native freshwater fish species listed for Great Britain.</p>
Figure 5 in A review of amphidromous freshwater fishes of the Chocó biogeographical region (Colombia and Ecuador): diversity, ecology, fisheries and conservation
Figure 5. – Representative habitat of freshwater amphidromous fishes in western of Colombia. A: photo of Valle River, 20 m collection site; B: Photo of Aguaclara River (Anchicayá Basin), 70 m collection site; C: Representative habitat in which post-larval Awaous transandeanus, Hemieleotris latifasciata, Hemieleotris levis and Sicydium spp. were collected in western Colombia. Photo of San Juan River, 18 m collection site; D: Type locality of Sicydium hildebrandi, photo of Dagua River in Cisneros, 350 m collection site.
Data: Cumulative heat stress in fluctuating temperatures and implications for the distribution of freshwater fish
Open the record for dataset details and reuse information.
Data from: A shift to metapopulation genetic management for persistence of a species threatened by fragmentation: the case of an endangered Australian freshwater fish
Open the record for dataset details and reuse information.
Assessing patterns and risk to Chilean freshwater fish distributions using multi-species occupancy models
Open the record for dataset details and reuse information.
Differential reproductive plasticity under thermal variability in a freshwater fish (Danio rerio)
Open the record for dataset details and reuse information.
Data and code: Microgeographic variation in demography and thermal regimes stabilize regional abundance of a widespread freshwater fish
Open the record for dataset details and reuse information.
Data from: Immediate genetic augmentation and enhanced habitat connectivity are required to secure the future of an iconic endangered freshwater fish population
Open the record for dataset details and reuse information.
Four decades of climatic fluctuations and fish recruitment stability across a marine-freshwater gradient
Open the record for dataset details and reuse information.
Data from: Does migration promote or inhibit diversification? A case study involving the dominant radiation of temperate Southern Hemisphere freshwater fishes
<p>While theory predicts that dispersal is a pivotal influence on speciation and extinction rates, it can have contradictory effects on each, such that empirical studies are needed to quantify its role. In many studies, dispersal reduction appears to promote diversification, although some analyses of migratory species suggest otherwise. Here we test for a relationship between migratory status and diversification rate within the dominant radiation of temperate Southern Hemisphere freshwater fishes, the Galaxiidae. We reconstructed a molecular phylogeny for the group, comprising >95% of extant lineages, and applied State-dependent Speciation Extinction models to estimate speciation, extinction, and diversification rates. In contrast to some previous studies, we revealed higher diversification rates in non-migratory lineages. The reduced gene flow experienced by non-migratory galaxiids appears to have increased diversification under conditions of allopatry or local adaptation. Migratory galaxiid lineages, by contrast, are genetically homogeneous within landmasses, but may also be rarely able to colonise other landmasses in the temperate Southern Hemisphere. The life history state exhibiting higher diversification likely reflects the spatial context of the study system relative to species dispersal abilities, by means of the intermediate dispersal model; the accurate quantification of dispersal abilities will aid in our understanding of these likely interactions.</p>
Personality does not predict individual niche variation in a freshwater fish
Animal populations can exhibit considerable inter-individual variation in both behavioral traits and niche use, but the potential connections between these characteristics are rarely compared for the same individuals. We aimed to test whether behavioral syndromes were predictive of individual diet or microhabitat in a native New Zealand freshwater fish, <i>Gobiomorphus cotidianus</i>. We carried out laboratory behavioral assays and repeated habitat and diet measurement in a semi-natural mesocosm system. We found considerable repeatability in individual behavior, largely consistent with a proactive/reactive behavioral syndrome. We also found modest individual repeatability in microhabitat use and relatively strong individual specialization in diet. However, no measure of niche use in the mesocosms was significantly predicted by individual personality. Further studies of this type will be needed to assess whether links between individual behavior and resource use are more important in other species or ecological contexts.
Speciation rate and the diversity of fishes in freshwaters and the oceans
<p class="CxSpFirst"><span><span><span><span><span><span><span><span><span><span><span>Aim: The number of fish taxa that occur exclusively in marine biomes is approximately equal to the number that occur in freshwater biomes. Both the geographic area and habitable volume of the marine realm are vastly greater than for Earth's freshwater ecosystems, suggesting that the density of marine species is proportionately much lower in the oceans. Because freshwater lineages are relatively recently derived from older marine lineages, this difference in species density suggests that speciation rates might be elevated in freshwater systems. I tested whether speciation rates differ systematically between freshwater and marine habitats.</span></span></span></span></span></span></span></span></span></span></span></p> <p class="CxSpMiddle"><span><span><span><span><span><span><span><span><span><span><span>Location: Aquatic ecosystems worldwide</span></span></span></span></span></span></span></span></span></span></span></p> <p class="CxSpMiddle"><span><span><span><span><span><span><span><span><span><span><span>Taxon: Ray-finned fishes (Actinopterygii)</span></span></span></span></span></span></span></span></span></span></span></p> <p class="CxSpMiddle"><span><span><span><span><span><span><span><span><span><span><span>Methods: Marine-freshwater transitions were tabulated from literature survey and from ancestral state reconstruction. I tested for repeated effects of salinity transitions on speciation rate using formal state-dependent diversification methods (STRAPP, FiSSE). Using maximum likelihood, I then tested for absolute (unreplicated) differences in speciation rate between marine and freshwater lineages.</span></span></span></span></span></span></span></span></span></span></span></p> <p class="CxSpMiddle"><span><span><span><span><span><span><span><span><span><span><span>Results: Ray-finned fishes have undergone numerous transitions from marine to freshwater systems, but the vast majority of freshwater species richness has resulted from a handful of freshwater colonization events. Speciation rates in freshwater lineages are substantially faster on average than those of marine lineages, but transitions to freshwaters do not lead to elevated rates of speciation in general. This paradox of state-dependent diversification arises because of the disproportionate effect of several freshwater clades with high species richness and fast rates of speciation. </span></span></span></span></span></span></span></span></span></span></span></p> <p class="CxSpMiddle"><span><span><span><span><span><span><span><span><span><span><span>Main Conclusions: Transitions to freshwater do not cause faster rates of speciation, but freshwater ecosystems worldwide are dominated by several clades with relatively fast rates of speciation. There is no evidence that invasion of a novel habitat (freshwater) is generally sufficient to trigger a burst of speciation in colonizing lineages. These results raise an important conceptual problem for the interpretation of state-dependent diversification analyses. </span></span></span></span></span></span></span></span></span></span></span></p>
Data from: Genetic structure and diversity of the blueface darter Etheostoma cyanoprosopum, a microendemic freshwater fish in the southeastern United States
Darters represent one of the most diverse groups of freshwater fishes in North America, but approximately 33% of the 215 recognized species are considered imperiled on the IUCN Red List. Discovery and description of new darter species continues at a relatively rapid pace, with many exhibiting microendemic geographic distributions and little baseline data for conservation decisions. The Blueface Darter Etheostoma cyanoprosopum is a newly described species that occupies < 20 km of stream reaches in the Bear Creek system of the Tennessee River drainage and the Hubbard Creek system of the Black Warrior River drainage in the Mobile Basin (Alabama, USA). In addition to restricted distribution, the species is threatened by habitat degradation and several natural and man-made barriers that putatively fragment connectivity among populations. This study used microsatellite and mitochondrial (mt) DNA data with comparisons to the relatively broadly distributed sister species (Bandfin Darter E. zonistium) to evaluate multiple objectives about genetic connectivity and diversity among Blueface Darter populations. Analysis of mtDNA data indicated a lack of historical structuring across the Tennessee-Black Warrior river drainage divide and within the Bear Creek system. However, microsatellite-based Bayesian cluster analyses and F-statistics suggested contemporary isolation across the drainage divide and evidence for reservoir-induced fragmentation within the Bear Creek system. Compared to the sister Bandfin Darter, Blueface Darter populations exhibited reduced levels of genetic diversity, rendering them more susceptible to local extirpation and reduced fitness. Continued monitoring and quantitative ecological studies are recommended to understand population-specific measures of occurrence and abundance.
Data from: Multispecies conservation of freshwater fish assemblages in response to climate change in the southeastern United States
Aim: Streamflow and water temperature are primary variables influencing the distribution of freshwater taxa. Climate-induced changes in these variables are already causing shifts in species distributions, with continued changes projected in the coming decades. The Mobile River Basin (MRB), located in the southeastern United States, contains some of the highest levels of temperate freshwater biodiversity in North America. We integrated species distribution data with contemporary and future streamflow and water temperature data as well as other physical habitat data to characterize occurrence probabilities of fish species in the MRB with the goal of identifying current and future areas of high conservation value. Location: Mobile River Basin, southeastern United States Methods: We used a maximum entropy approach to estimate baseline and future occurrence probability distributions for 88 fish species in the MRB based on model-generated streamflow and water temperature as well as geologic, topographic, and land cover data. Areas of conservation prioritization were identified based on regions that contain suitable habitat for high levels of biodiversity according to baseline and future conditions while accounting for uncertainty associated with multiple future climate projections. Results: On average, flow (28%), water temperature (28%), and geology (30%) contribute evenly to determining suitable habitat for fish species in the MRB. Based on baseline and future species distribution model estimates, high priority streams (best 10%) are largely concentrated in the eastern portion of the MRB, with a majority (51%) located within the Coosa and Tallapoosa River systems. Main Conclusion: We provide a framework that uses relevant hydrologic and environmental data in the context of future climatic uncertainty to estimate areas of freshwater conservation opportunity in the coming decades. While streamflow and water temperature represent important habitat for freshwater fishes in the MRB, distributions are also constrained by other aspects of the physical environment.
Global Regionalized Characterization Factors for Phosphorus and Nitrogen Impacts on Freshwater Fish Biodiversity
<p>Overview and guidance for using the data in "CFs_freshwater_eutrophication" related to the article "Global Regionalized Characterization Factors for Phosphorus and Nitrogen Impacts on Freshwater Fish Biodiversity"</p> <p> </p> <p>See the "readme_CFs_freshwater_eutrophication.pdf" file to find the details of the enclosed data.</p> <p> </p> <p>Units</p> <ul> <li>Phosphorus from direct emissions to freshwater or diffuse sources on the soil: PDF·year/kgP</li> <li>Nitrogen from direct emissions to freshwater or diffuse sources on the soil: PDF·year/kgN</li> <li>Erosion: PDF·year/(m2·year)</li> </ul> <p>Please excuse any typos in the units in the xlsx files.</p>
Data from: mapping endemic freshwater fish richness to identify high priority areas for conservation: an ecoregion approach
<p>Freshwater ecosystems are experiencing accelerating global biodiversity loss. Thus, knowing where these unique ecosystems' species richness reaches a peak can facilitate their conservation planning. By hosting more than 290 freshwater fishes, Iran is a major freshwater fish hotspot in the Middle East. Considering the accelerating rate of biodiversity loss, there is an urgent need to identify species rich areas and understanding of the mechanisms driving biodiversity distribution. In this study, we gathered distribution records of all endemic freshwater fishes of Iran (85 species) to develop their richness map and determine the most critical drivers of their richness patterns from an ecoregion approach. We performed a generalized linear model (GLM) with quasi-Poisson distribution to identify contemporary and historical determinants of endemic freshwater fish richness. We also quantified endemic fish similarity among the 15 freshwater ecoregions of Iran. Results showed that endemic freshwater fish richness is highest in the Zagros Mountains while moderate level of richness was observed between Zagros and Alborz Mountains. High, moderate and low richness of endemic freshwater fish match with Upper Tigris & Euphrates, Namak, and Kavir & Lut Deserts ecoregions respectively. Kura - South Caspian Drainages and Caspian Highlands were the most similar ecoregions and Orumiyeh was the most unique ecoregion according to endemic fish presence. Precipitation and precipitation change velocity since the Last Glacial Maximum were the most important predictors of endemic freshwater fish richness. Areas identified to have the highest species richness have high priority for the conservation of freshwater fish in Iran, therefore, should be considered in future protected areas development.</p>
Figure 10 in Non-native freshwater fish from drainages of Rio Grande do Sul State, Brazil
Figure 10. Number of records of allochthonous species Pachyurus bonariensis recorded over the years in the Laguna dos Patos (SLP) system according to scientific collections databases. No record of this species was found in the fish collections.
Figure 15 in Non-native freshwater fish from drainages of Rio Grande do Sul State, Brazil
Figure 15. Number of records per decade between 1960 and 2020 of the two exotic species with the highest number of records in scientific collections.
Figure 14 in Non-native freshwater fish from drainages of Rio Grande do Sul State, Brazil
Figure 14. Number of records of the ten exotic species found in Brazil by decades between 1960 and 2020 according to scientific collections databases.
An updated survey of freshwater fishes within Letchworth State Park and surrounding areas of the Genesee River
<p>The goal of this study was to gather information about freshwater fishes in Letchworth State Park (42.615275°N, -77.992825°W), a portion of New York State-owned land located in the Genesee River watershed that lacks known data about its fish diversity. The fish collection took place between 2017 and 2019 in the Genesse River upstream and downstream of the falls using gill, hoop, and seine netting and electrofishing. This was the first attempt at a comprehensive survey of this portion of the river, which allowed for a baseline to be established regarding fish biodiversity in the region. The updated total number of species found in this portion of the Genesee River was 25, 22 of which were newly identified downstream of the falls, in Letchworth State Park. We encourage further collection and continuation of this survey with consistent sampling techniques to promote ongoing field surveys and fish collection that inform freshwater fish diversity in stream ecosystems across the globe.</p>
ScienceDex guides
Understand access before you commit
These curated guides explain access requirements, typical timelines, costs, and reuse considerations for widely used research datasets.
Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.