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768 results for “sympatric species”
FIGURE 3 in Morphological divergences as drivers of diet segregation between two sympatric species of Serrapinnus (Characidae: Cheirodontinae) in macrophyte stands in a neotropical floodplain lake
FIGURE 3 | Variation in the diet breadth of Serrapinnus notomelas and Serrapinnus sp.1 using PERMDISP, for the juveniles and adults in a lake in the upper Paraná River floodplain, Brazil. Boxes represent the 25th and 75th quartiles and demonstrate the individual variation of the trophic niche. The horizontal bars in each box represent the average niche breadth. Whiskers indicate the range and individual symbols indicate outliers. J=juveniles; A= adults.
FIGURE 1 in Morphological divergences as drivers of diet segregation between two sympatric species of Serrapinnus (Characidae: Cheirodontinae) in macrophyte stands in a neotropical floodplain lake
FIGURE 1 | Study area: location of sampling site in the upper Paraná River floodplain, Mato Grosso do Sul State, Brazil.
Linked collectors and determiners for: Integrative taxonomy reveals two sympatric species of the genus Eucriotettix Hebard, 1930 (Orthoptera: Tetrigidae).
Natural history specimen data linked to collectors and determiners held within, "Integrative taxonomy reveals two sympatric species of the genus Eucriotettix Hebard, 1930 (Orthoptera: Tetrigidae)". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="https://bionomia.net/dataset/c1392784-8900-46a7-aa5d-07c5d240a7d9">https://bionomia.net/dataset/c1392784-8900-46a7-aa5d-07c5d240a7d9</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/c1392784-8900-46a7-aa5d-07c5d240a7d9">https://gbif.org/dataset/c1392784-8900-46a7-aa5d-07c5d240a7d9</a>. Formatted as a Frictionless Data package.
Linked collectors and determiners for: Crickets of the subfamily Eneopterinae (Orthoptera: Grylloidea) from Sandakan, Sabah: one new species and calling songs of a sympatric species.
Natural history specimen data linked to collectors and determiners held within, "Crickets of the subfamily Eneopterinae (Orthoptera: Grylloidea) from Sandakan, Sabah: one new species and calling songs of a sympatric species". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="https://bionomia.net/dataset/1e87ced1-1631-463d-92d4-508d30dbbc48">https://bionomia.net/dataset/1e87ced1-1631-463d-92d4-508d30dbbc48</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/1e87ced1-1631-463d-92d4-508d30dbbc48">https://gbif.org/dataset/1e87ced1-1631-463d-92d4-508d30dbbc48</a>. Formatted as a Frictionless Data package.
Linked collectors and determiners for: Isoperla riverae, a new stonefly species from the southeast Nearctic, with notes on sympatric species including the larval description of Isoperla lenati Szczytko & Kondratieff, 2015 (Plecoptera: Perlodidae).
Natural history specimen data linked to collectors and determiners held within, "Isoperla riverae, a new stonefly species from the southeast Nearctic, with notes on sympatric species including the larval description of Isoperla lenati Szczytko & Kondratieff, 2015 (Plecoptera: Perlodidae)". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="https://bionomia.net/dataset/eaa7d839-74bc-4840-a71a-b0f419c8b1e1">https://bionomia.net/dataset/eaa7d839-74bc-4840-a71a-b0f419c8b1e1</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/eaa7d839-74bc-4840-a71a-b0f419c8b1e1">https://gbif.org/dataset/eaa7d839-74bc-4840-a71a-b0f419c8b1e1</a>. Formatted as a Frictionless Data package.
Linked collectors and determiners for: On the putatively incorrect identification and " redescription " of Paratropis elicioi Dupérré 2015 (Paratropididae, Araneae) with the description of two new sympatric species from Ecuador.
Natural history specimen data linked to collectors and determiners held within, "On the putatively incorrect identification and " redescription " of Paratropis elicioi Dupérré 2015 (Paratropididae, Araneae) with the description of two new sympatric species from Ecuador". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="https://bionomia.net/dataset/2a05c6d9-5e8a-4ce7-97ad-05fe1bb9d338">https://bionomia.net/dataset/2a05c6d9-5e8a-4ce7-97ad-05fe1bb9d338</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/2a05c6d9-5e8a-4ce7-97ad-05fe1bb9d338">https://gbif.org/dataset/2a05c6d9-5e8a-4ce7-97ad-05fe1bb9d338</a>. Formatted as a Frictionless Data package.
Figure 1 in Reproductive strategies of two sympatric species of Hyalella Smith, 1874 (Amphipoda, Dogielinotidae) in laboratory conditions
Figure 1. Assortative mating, estimated as the relationship of male and female body size (head length in mm) for precopulatory mating pairs in Hyalella pleoacuta and H. castroi. HLm, head length of males; HLf, head length of females; n, number of individuals.
Figure 3 in Reproductive strategies of two sympatric species of Hyalella Smith, 1874 (Amphipoda, Dogielinotidae) in laboratory conditions
Figure 3. Regression analyses between body size of ovigerous females (head length—HL) and number of eggs in embryonic developmental stages and number of juveniles in H. castroi. F, fecundity.
Figure 2 in Reproductive strategies of two sympatric species of Hyalella Smith, 1874 (Amphipoda, Dogielinotidae) in laboratory conditions
Figure 2. Regression analyses between body size of ovigerous females (head length—HL) and number of eggs in embryonic developmental stages and number of juveniles of H. pleoacuta. F, fecundity.
Fig. 1 in Co-occurrence of two sympatric galliform species on a landscape-scale
Fig. 1. Map of Cat Tien NP with five survey transects each in bamboo, mixed deciduous, and mosaic forests, and seven transects in evergreen forest.
Fig. 1 in Trophic interactions among sympatric zooplanktivorous fish species in volume change conditions in a large, shallow, tropical lake
Fig. 1. Lake Chapala, Mexico. Numbers in bold represent the sampling sites, in italics depths contours (m).
Data for: Inadequate sampling of the soundscape leads to overoptimistic estimates of recogniser performance: A case study of two sympatric macaw species
<p><span></span></p> <p>Passive acoustic monitoring (PAM) offers the potential to dramatically increase the scale and robustness of species monitoring in rainforest ecosystems. PAM generates large volumes of data that require automated methods of target species detection. Species-specific recognisers, which often use supervised machine learning, can achieve this goal. However, they require a large training dataset of both target and non-target signals, which is time-consuming and challenging to create. Unfortunately, very little information about creating training datasets for supervised machine learning recognisers is available, especially for tropical ecosystems. Here we show an iterative approach to creating a training dataset that improved recogniser precision from 0.12 to 0.55. By sampling background noise using an initial small recogniser, we addressed one of the significant challenges of training dataset creation in acoustically diverse environments. Our work demonstrates that recognisers will likely fail in real-world settings unless the training dataset size is large enough and sufficiently representative of the ambient soundscape. We outline a simple workflow that can provide users with an accessible way to create a species-specific PAM recogniser that addresses these issues for tropical rainforest environments. Our work provides important lessons for PAM practitioners wanting to develop species-specific recognisers for acoustically diverse ecosystems.</p>
Spatially and temporally varying selection influence species boundaries in two sympatric Mimulus
<p><span>Spatially and temporally varying selection can maintain genetic variation within and between populations, but it is less known how these forces influence divergence between closely related species. We identify the interaction of temporal and spatial variation in selection and their role in either reinforcing or eroding divergence between two closely related <em>Mimulus</em> species. Using repeated reciprocal transplant experiments with advanced generation hybrids we compare the strength of selection on quantitative traits involved in adaptation and reproductive isolation in <em>Mimulus</em> <em>guttatus</em> and <em>Mimulus</em> <em>laciniatus</em> between two years with dramatically different water availability. We found strong divergent habitat-mediated selection on traits in the direction of species differences during a drought in 2013, suggesting that spatially varying selection maintains species divergence. However, a relaxation in divergent selection on most traits in an unusually wet year (2019), including flowering time which is involved in pre-zygotic isolation, suggests that temporal variation in selection may weaken species differences. Therefore, we find evidence that temporally and spatially varying selection may have opposing roles in mediating species boundaries. Given our changing climate, future growing seasons are expected to be more similar to the dry year, suggesting that in this system climate change may actually increase species divergence. </span></p>
FIG. 1 in A morphometric comparison of two sympatric Campylopus Brid. (Leucobryaceae, Bryophyta) species
FIG. 1. — Species analyzed: A-E, Campylopus lamellatus Mont.; F-J, Campylopus julaceus A. Jaeger: A, F, dry plant; B, G, wet plant; E, J, basal leaf; D, I, middle leaf; C, H, apex leaf. Scale bars: A, B, F, G, 2 mm; C-E, H-J, 500 μm.
FIG. 4 in A morphometric comparison of two sympatric Campylopus Brid. (Leucobryaceae, Bryophyta) species
FIG. 4. — Principal Components analysis (PCA) of the leaf characters of the basal, middle, of apical the shoots of C. julaceus A. Jaeger (including the holotype) and C. lamellatus Mont.
FIG. 5 in A morphometric comparison of two sympatric Campylopus Brid. (Leucobryaceae, Bryophyta) species
FIG. 5. — Propagula of C. julaceus A. Jaeger: A, gametophyte comal tuft and a detached propagulum; B, detached propagulum, already producing rhizoids; C, propagulum cultivated for 2 days, showing several protonematal filaments. Scale bars: A, 1 mm; B, 0.5 mm; C, 0.2 mm..
Dietary and niche analyses of four endemic and sympatric batoid species of the subtropical South Atlantic Ocean
<p><span>We aimed to characterize the trophic ecology and test the hypothesis of niche overlap between four endemic and sympatric batoid species of the subtropical South Atlantic. Data were collected between 2017 and 2022 from two artisanal fishery communities in southern Brazil. Batoid stomach contents were identified, separated into categories, and weighed. We calculated the Levins, Pianka's, and relative dietary importance index (IRI), and performed a similarity test using PERMANOVA and the similarity percentage (SIMPER) for niche analysis. We analyzed 229 stomachs of four batoid species, 187 containing food. All species showed a narrow food niche. The most important diet items for each species were: <em>Leptochaela</em> <em>serratorbita</em> and Onuphidae for <em>Dasyatis</em> <em>hypostigma</em>; Nematoda for <em>Pseudobatos</em> <em>horkelii</em>; <em>L</em>. <em>serratorbita</em> and <em>Sicyonia</em> <em>dorsalis</em> for <em>Rioraja</em> <em>agassizii</em>; and <em>Achelous</em> <em>spinicarpus</em> for <em>Sympterygia</em> <em>bonapartii</em>. The analyses showed (statistically significant) dissimilarity among the species' diets without significant niche overlap. This study provides ecology-feeding information for four batoid species with specialized diets composed of benthic prey species. Our results detected the absence of significant niche overlap among batoid species, suggesting other types of niche partitioning and spatiotemporal habitat variation. This information could be considered for local management plans.</span></p>
Fig. 8 in Description of two new species forming a sympatric species pair of Crenicichla (Teleostei: Cichlidae) endemic to the Piray Guazú River in the Paraná River Basin, Misiones, Argentina and belonging to the C. mandelburgeri species complex
Fig. 8. Overview of phylogenetic relationships and molecular and morphological differentiation of C. ama sp. nov. and C. aravera sp. nov. and its parallel species pair (C. ypo Casciotta, Almirón, Piálek, Gómez & Říčan, 2010 and C. yjhui Piálek, Casciotta, Almirón & Říčan, 2019). A. Summary of phylogenetic relationships within the C. mandelburgeri species complex with a nDNA ddRAD SVDQ species tree analysis as main topology focusing on the parallel species pairs in the Piray Guazú (the two new species) and Urugua-í River basins. Species tree is based on 60% SNP-representation matrix using fixed (= homozygotic sites). Red and blue basal branches and nodes in the species tree topology show biogeography (Red: Iguazú, Blue: Middle Paraná). Numbers in parentheses are total numbers of analyzed individuals (in nDNA/ in mtDNA). Numbers at nodes show bootstrap support values. Species colours as in Fig. 5. Blue arrows show nDNA introgression from C. mandelburgeri into C. aravera and C. yjhui. Modified from Říčan et al. (2021b). B. Alternative topology to the right of the tree represents mtDNA relationships of species in the two focal species pairs. Only C. ypo does not have a mitonuclear phylogenetic conflict. Modified from Říčan et al. (2021b). C. Inference of population structure based on the Admixture analysis for the two focal species pairs. Note majority assignment of C. yjhui and C. aravera with C. ypo and C. ama and partial assignment to C. mandelburgeri sensu lato at K10 to K13, and complete separation of all species at K14. Modified from Říčan et al. (2021b). D. Morphometric variation and discrimination of the two species pairs of sympatric species from the Piray Guazú (C. ama, C. aravera) and Urugua-í (C. ypo, C. yjhui) River basins analyzed by PCA based on holotype and paratype specimens ≥ 70 mm SL. Morphological measurements followed Kullander's (1986) methodology for Crenicichla Heckel, 1840 and were used as proportional values in % of SL. Note complete separation of species between ecomorphs (sympatric) and partial separation within ecomorphs (allopatric). Modified from Říčan et al. (2021b).
Fig. 7 in Description of two new species forming a sympatric species pair of Crenicichla (Teleostei: Cichlidae) endemic to the Piray Guazú River in the Paraná River Basin, Misiones, Argentina and belonging to the C. mandelburgeri species complex
Fig. 7. Paratype locality of C. ama sp. nov., tributary to upper arroyo Piray Guazú on RP16 23 km from San Pedro (26°35′45.90″ S, 54°16′59.96″ W), 26 November 2016. Crenicichla aravera sp. nov. is absent at this locality.
Fig. 4 in Description of two new species forming a sympatric species pair of Crenicichla (Teleostei: Cichlidae) endemic to the Piray Guazú River in the Paraná River Basin, Misiones, Argentina and belonging to the C. mandelburgeri species complex
Fig. 4. Lower pharyngeal tooth plate in occlusal view. A. Crenicichla ama sp. nov., paratype (MLP 11182, 94.5 mm). B. Crenicichla aravera sp. nov., paratype (MLP 11452, 93.7 mm). Scale bars = 1 mm.
ScienceDex guides
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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.