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.
212
datasets available to search
ShareScore release 0.7.1
Dataset results
212 results for “fish ecology”
Fig. 5 in Fishermen's local ecological knowledge on Southeastern Brazilian coastal fishes: contributions to research, conservation, and management
Fig. 5. Ordination plot of the correspondence analysis (first two axes) based on fishermen's answers about migratory behavior of the nine studied fish species in the southeastern Brazilian coast: Absa = Abudefduf saxatilis; Boru = Bodianus rufus; Cala = Caranx latus; Epma = Epinephelus marginatus; Haau = Haemulon aurolineatum; Heba = Hemiramphus balao; Kysp = Kyphosus spp.; Mifu = Micropogonias furnieri; Sesp = Seriola spp.
F I G U R E 3 in The future of fish-based ecological assessment of European rivers: from traditional EU Water Framework Directive compliant methods to eDNA metabarcoding-based approaches
F I G U R E 3 Comparison of trait-based metrics expressed in relative number of individuals computed from eDNA () and traditional electro-fishing (TEF;) samples in the five river stretches (RS), A, B, C, D and E. Trait categories: BEN, benthic; EUR, eurytopic; INS, insectivorous; OMN, omnivorous; PHY, phytophilic; POT, potamodromous; RHE, rheophilic; TOL, tolerant; PEL pelagic. Significance of the differences between eDNA and TEF metrics are shown: ns, not significant (P> 0.05)
F I G U R E 4 in The future of fish-based ecological assessment of European rivers: from traditional EU Water Framework Directive compliant methods to eDNA metabarcoding-based approaches
F I G U R E 4 Boxplots (, median value;, interquartile range;, full range;, outliers) showing the variability in the eDNAadapted fish index (six metrics) computed at three sites (Brangues, Rhins and Usses) where 10 eDNA water samples were collected once. At each site, the eDNA-based six-metric fish index was computed for each of the 45 possible pairs of samples
F I G U R E 2 in The future of fish-based ecological assessment of European rivers: from traditional EU Water Framework Directive compliant methods to eDNA metabarcoding-based approaches
F I G U R E 2 Comparison of trait-based metrics expressed in number of species computed from eDNA () and traditional electrofishing (TEF;) samples in the five river stretches (RS), A, B, C, D and E. Trait categories: BEN, benthic; EUR, eurytopic; INS, insectivorous; OMN, omnivorous; PHY, phytophilic; POT, potamodromous; RHE, rheophilic; TOL, tolerant; PEL pelagic. Significance of the differences between eDNA and TEF metrics are shown: P <0.05; P <0.01; ns, not significant (P> 0.05)
F I G U R E 1 in The future of fish-based ecological assessment of European rivers: from traditional EU Water Framework Directive compliant methods to eDNA metabarcoding-based approaches
F I G U R E 1 Sampling locations along river stretches (RS) A to E () of the main channel of the Rhône River, France, using both traditional electro-fishing (TEF) and eDNA., Sites sampled every 2 months (September 2015– August 2016);, sites where ten eDNA water samples (filtration capsules) were collected once;, sites located on the tributaries or the Rhône River itself sampled once for eDNA. The 10 metric fish index and the adapted six-metric fish index were computed at all sites with a black filled symbol within natural water bodies
Ecological outcomes of hybridization vary extensively in Catostomus fishes
Hybridization outcomes vary geographically and can depend on the environment. Hybridization can also reshape biotic interactions, leading to ecological shifts. If hybrids function differently ecologically in ways that enhance or reduce fitness, and those ecological roles vary geographically, ecological factors might explain variation in hybridization outcomes. However, relatively few studies have focused on ecological traits of hybrids. We compared the feeding ecology of <i>Catostomus</i> fish species and hybrids by using stable isotopes δ<sup>13</sup>C and δ<sup>15</sup>N as a proxy for diet and habitat use, and compared two native species, an introduced species, and three interspecific hybrid crosses. We included hybrids and parental species from seven rivers where hybridization outcomes vary. Relative isotopic niches of native species varied geographically, but native species did not fully overlap in isotopic space in any river sampled, suggesting little overlap of resource use between historically sympatric species. The introduced species overlapped with one or both native species in every river, suggesting similar resource use and potential competition. Hybrids occupied intermediate, matching, or more transgressive isotopic niches, and varied within and among rivers. Ecological outcomes of hybridization varied across locations, implying that hybridization might have unpredictable, idiosyncratic ecological effects. --
Quantifying the ecological impacts of alien aquatic macrophytes: A global meta‐analysis of effects on fish, macroinvertebrate and macrophyte assemblages
<p>Biological invasions constitute a pervasive and growing threat to the biodiversity and functioning of freshwater ecosystems. Macrophytes are key primary producers and ecosystem engineers in freshwaters, meaning that alien macrophyte invasions have the capacity to alter the structure and function of recipient aquatic ecosystems profoundly. Although prevailing wisdom holds that alien macrophyte invasions tend to compromise freshwater ecosystem structure and function, the ecological impacts of alien macrophyte invasion have not been quantitatively reviewed to date.</p> <p>Here we present a global meta-analysis of 202 cases from 53 research articles, exploring the impacts of alien macrophyte invasion on the abundance and diversity of three ubiquitous and ecologically important focal groups, which together comprise the bulk of non-microbial freshwater biodiversity: resident macrophytes, macroinvertebrates and fish. Our synthesis includes data from all continents except Antarctica and Asia, covering 25 alien macrophyte species, but reveals considerable taxonomic and geographical biases in knowledge.</p> <p>Meta-analysis results reveal that invasion by alien macrophytes has an overall negative impact on taxonomic diversity of the three focal groups, but no consistent effect on abundance. At a finer resolution, we detect a strong negative effect of alien macrophyte invasion on resident macrophyte abundance and diversity, and a significant but smaller positive effect of submerged alien macrophyte invasion on macroinvertebrates. Effects on fish appear inconsistent.</p> <p>Our findings emphasise the importance of context- and taxon-specific ecological research in informing appropriate and proportionate management of alien macrophyte invasions, since alien macrophyte impacts are not consistently negative. We also identify significant geographical and taxonomic limitations in existing studies, quantitative data being lacking for many alien taxa.</p>
Figure 4 in Ecological and economic impacts of exotic fish species on fisheries in the Pearl River basin
Figure 4. Multipanel display of the pairwise relationships between the biomass percentages of different species in catches, with bivariate scatter plots in the lower panels, histograms on the diagonal and Pearson's r correlations in the upper panels (statistical significance: P <0.001 ***, P <0.01 **, P <0.05 *).
Figure 3 in Ecological and economic impacts of exotic fish species on fisheries in the Pearl River basin
Figure 3. Correlation analysis between the CPUE, number of economic exotic species, biomass percentage of exotic species and environmental variables.
Figure 2 in Ecological and economic impacts of exotic fish species on fisheries in the Pearl River basin
Figure 2. Biomass percentages (mean ± SE) of exotic and native species at different sites (A) and in different months (B).
Fig. 3 in Impact of ecotourism on the fish fauna of Bonito region (Mato Grosso do Sul State, Brazil): ecological, behavioural and physiological measures
Fig. 3. Image illustrating under water visibility at the beginning of the snorkeling excursion and the presence of tourists (Lima, 2008).
Fig. 1 in Impact of ecotourism on the fish fauna of Bonito region (Mato Grosso do Sul State, Brazil): ecological, behavioural and physiological measures
Fig. 1. Map showing the location of the study area: Sucuri River (C), município of Bonito area (B), Brazil (A). Adapted from Miranda & Coutinho (2004).
Fig. 8 in Impact of ecotourism on the fish fauna of Bonito region (Mato Grosso do Sul State, Brazil): ecological, behavioural and physiological measures
Fig. 8. Variation of behaviour patterns between before (8h00) and after (9h00) the first disturbance of tourists in the river (mean and SEM) for M. bonita; (a) Tourism and (b) No Tourism. Lighter bars = 8h00; darker bars = 9h00 (Mann-Whitney U-test). N = 70; * p <0.05; ** p <0.01.
Fig. 9 in Impact of ecotourism on the fish fauna of Bonito region (Mato Grosso do Sul State, Brazil): ecological, behavioural and physiological measures
Fig. 9. Variation (mean and SEM) of cortisol responses to restraining stress in Moenkhausia bonita individuals at the No Tourism and Tourism sites (Mann-Whitney U-test, N = 6; Z = -2.95; p <0.005).
Fig. 4. Composite phylogenetic hypothesis for 33 in Phylogenetic signal and major ecological shifts in the ecomorphological structure of stream fish in two river basins in Brazil
Fig. 4. Composite phylogenetic hypothesis for 33 stream fish species based on six different studies. Solid circles indicate six taxonomic groups that were significant in the canonical phylogenetic ordination (CPO); they are numerically labeled as follows: 1, Siluriformes/Characiformes; 2, Loricariidae; 3, Farlowella/Rineloricaria; 4, Characidae; 5, Hypostominae; 6, Pimelodella/Rhamdia.
Fig. 3 in Phylogenetic signal and major ecological shifts in the ecomorphological structure of stream fish in two river basins in Brazil
Fig. 3. Projection of the first three PCA axes based on 14 ecomorphological attributes for the following fish species from the upper São Francisco River, Brazil: Apaibi, Apareiodon ibitiensis; Astriv, Astyanax rivularis; Cetihe, Cetopsorhamdia iheringi; Chafas, Characidium fasciatum; Crevar, Creagrutus aff. varii; Harnov, Harttia cf. novalimensis; Micsp, Microlepidogaster sp.; Neofra, Neoplecostomus franciscoensis; Piaarg, Piabina argentea; Tribra, Trichomycterus brasiliensis; Trirei, Trichomycterus reinhardti and Trivar, Trichomycterus variegatus. The figures in black indicate the most representative ecomorphotypes.
Fig. 2 in Phylogenetic signal and major ecological shifts in the ecomorphological structure of stream fish in two river basins in Brazil
Fig. 2. Projection of the first two PCA axes based on 14 ecomorphological attributes for the following fish species from the upper Paraguai River, Brazil: Ancsp, Ancistrus sp.; Astasu, Astyanax asuncionensis; Astlin, A. lineatus; Astsp, Astyanax sp.; Chafas, Characidium fasciatum; Chazeb, C. zebra; Cremer, Creagrutus meridionalis; Farpar, Farlowella paraguayensis; Hyplue, Hyphessobrycon luetkenii; Hypbou, Hypostomus boulengeri; Hypcoc, Hypostomus cochliodon; Hypsp, Hypostomus sp.; Jupaca, Jupiaba acanthogaster; Moebon, Moenkhausia bonita; Moesan, M. sanctaefilomenae; Odopeq, Odontostilbe pequira; Parnas, Parodon nasus; Piator, Piabarchus torrenticola; Pimgra, Pimelodella gracilis; Rhaque, Rhamdia quelen; Rinlan, Rineloricaria lanceolata; and Sercal, Serrapinnus calliurus. The figures in black indicate the most representative ecomorphotypes.
Fig. 1 in Phylogenetic signal and major ecological shifts in the ecomorphological structure of stream fish in two river basins in Brazil
Fig. 1. Study area with the sampling sites at the upper Paraguai and upper São Francisco River basins. BOD: Serra da Bodoquena National Park; CAN: Serra da Canastra National Park; MG: Minas Gerais State; MS: Mato Grosso do Sul State; PG 1-6: sampling locations in the upper Paraguai River basin; SF 1-6: sampling locations in the upper São Francisco River basin.
Fig. 3 in Influence of a large dam and importance of an undammed tributary on the reproductive ecology of the threatened fish matrinxã Brycon orthotaenia Günther, 1864 (Characiformes: Bryconidae) in southeastern Brazil
Fig. 3. Histological sections of Brycon orthotaenia testis stained with Hematoxilin-eosin: (a) resting stage with seminiferous tubules cointaining only spermatogonia (S), (b)(c) maturing/mature with seminiferous tubules full of spermatozoa (Z) in acidophilic secretion (arrows) and (d) spent testis with few spermatozoa (Z) in the lumen (L) in acidophilic secretion (arrow). Bar = (a) 30 µm, (b), (d) 70 µm, (c) 80 µm.
Fig. 1 in Influence of a large dam and importance of an undammed tributary on the reproductive ecology of the threatened fish matrinxã Brycon orthotaenia Günther, 1864 (Characiformes: Bryconidae) in southeastern Brazil
Fig. 1. Location of the study sites of the upper rio São Francisco, downstream from the Três Marias Dam, Minas Gerais State (MG), Brazil. Site 1, immediately downstream from the Três Marias Dam and site 2, below the confluence with the rio Abaeté.
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.