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32 results for “ongoing speciation”
Figure 3 in Intraspecific variation in Gyrodactylus mediotorus and G. crysoleucas (Gyrodactylidae) from Nearctic shiners (Leuciscidae): evidence for ongoing speciation, host-switching, and parasite translocation
Figure 3. Bayesian inference (BI) phylogram of Gyrodactylus spp. parasitizing Nearctic Cypriniformes based on sequences of the ITS regions (927 bp). Values above branches indicate posterior probabilities (PP) from BI analyses and bootstrap support (BS) from ML. Values below 0.80 (BI) and 70 (ML) are shown as dashes.
Figure 2 in Intraspecific variation in Gyrodactylus mediotorus and G. crysoleucas (Gyrodactylidae) from Nearctic shiners (Leuciscidae): evidence for ongoing speciation, host-switching, and parasite translocation
Figure 2. Photomicrographs (A–C) and line drawings (B–D) of Gyrodactylus mediotorus King, Marcogliese, Forest, McLaughlin and Bentzen, 2013 from the blacktail shiner, Cyprinella venusta (A–B) and from the sand shiner, Notropis cf. stramineus (Guadalupe River) (C–D).
Figure 1 in Intraspecific variation in Gyrodactylus mediotorus and G. crysoleucas (Gyrodactylidae) from Nearctic shiners (Leuciscidae): evidence for ongoing speciation, host-switching, and parasite translocation
Figure 1. Photomicrographs (A) and line drawings (B) of Gyrodactylus crysoleucas from the blacktail shiner, Cyprinella venusta.
Data from: Correlated divergence of female and male genitalia in replicated lineages with ongoing ecological speciation
Divergence of genital traits among lineages has the potential to serve as a reproductive isolating barrier when copulation, insemination, or fertilization are inhibited by incompatibilities between female and male genitalia. Despite widespread evidence for genital trait diversity among closely related lineages and coevolution of female and male genitalia within lineages, few studies have investigated genital evolution during the early stages of speciation. We quantified genital variation in replicated population pairs of Poecilia mexicana with ongoing ecological speciation between sulfidic (H2S-containing) and nearby non-sulfidic habitats. These analyses revealed rapid and correlated divergence of female and male genitalia across evolutionarily independent population pairs exposed to divergent selection regimes. Both sexes exhibited convergent evolution of genital traits among populations inhabiting similar habitat types. Our results demonstrate that genital evolution can occur during the early stages of speciation-with-gene-flow, potentially as a result of variation in the intensity of sexual conflict among populations. Our results suggest genitalia may contribute to early stages of divergence, and challenge the generality of previously suggested mechanisms of genital evolution in poeciliids.
Data from: Correlated divergence of female and male genitalia in replicated lineages with ongoing ecological speciation
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Data from: Speciation in sympatry with ongoing secondary gene flow and an olfactory trigger in a radiation of Cameroon cichlids
The process of sympatric speciation in nature remains a fundamental unsolved problem. Cameroon crater lake cichlid radiations were long regarded as one of the most compelling examples; however, recent work showed that their origins were more complex than a single colonization event followed by isolation. Here, we performed a detailed investigation of the speciation history of a radiation of Coptodon cichlids from Lake Ejagham using whole-genome sequencing data. The existence of this radiation is remarkable since this 0.5 km2 lake offers limited scope for divergence across a shallow depth gradient, disruptive selection is weak, and the species are sexually monochromatic. We infer that Lake Ejagham was colonized by riverine cichlids soon after its formation 9,000 years ago, yet speciation occurred only in the last 1,000-2,000 years. We show that secondary gene flow from riverine species has been ongoing, into ancestral and extant Lake Ejagham lineages, and identify and date river-to-lake admixture blocks. One of these contains a cluster of olfactory receptor genes that introgressed close to the time of the first speciation event and coincides with a higher overall rate of admixture into the recipient lineages. Olfactory signaling is a key component of mate choice and species recognition in cichlids. A functional role for this introgression event is consistent with previous findings that assortative mating appears much stronger than ecological divergence in Ejagham Coptodon. We conclude that speciation in this radiation took place in sympatry, yet may have benefited from ongoing riverine gene flow.
FIGURE 17 in A taxonomic revision of the Palaearctic genus Roeseliana (Orthoptera: Tettigoniidae: Tettigoniinae: Platycleidini): a case of ongoing Mediterranean speciation
FIGURE 17. Roeseliana brunneri from Valle Ortazzo, calling song: (a), Sound Pressure Envelope, 5 s; (b), Sound Pressure Envelope, 0.2 s; (c), Pulses (tooth strikes), one syllable; (d), Time/Frequency Spectrogram, 6.5 s; (e-f), Frequency/Sound Pressure analysis, spot in one syllable.
FIGURE 24 in A taxonomic revision of the Palaearctic genus Roeseliana (Orthoptera: Tettigoniidae: Tettigoniinae: Platycleidini): a case of ongoing Mediterranean speciation
FIGURE 24. Tegmina length of Roeseliana. a) R. roeselii, brachypterous male (photo: R. Scherini); b) R. roeselii, holopterous male (photo: P. Fontana); c) R. roeselii, mesopterous male (photo: P. Fontana); d) R. roeselii, brachypterous female (photo: P. Fontana); e) R. azami minor, brachypterous male (photo: R. Scherini); f) R. azami minor, holopterous male (Photo: R. Scherini).
FIGURE 21 in A taxonomic revision of the Palaearctic genus Roeseliana (Orthoptera: Tettigoniidae: Tettigoniinae: Platycleidini): a case of ongoing Mediterranean speciation
FIGURE 21. Scatterplot of the first two factors resulting from the PCA analysis of biometrics of males and female of the the following populations: R. ambitiosa, R. azami, and the Italian populations of R. azami minor. The confidence ellipses define the region that contains 95% of all samples that can be drawn from the underlying normal distribution.
FIGURE 14 in A taxonomic revision of the Palaearctic genus Roeseliana (Orthoptera: Tettigoniidae: Tettigoniinae: Platycleidini): a case of ongoing Mediterranean speciation
FIGURE 14. Roeseliana azami minor from Switzerland, calling song: (a), Sound Pressure Envelope, 5 s; (b), Sound Pressure Envelope, 0.25 s; (c), Pulses (tooth strikes), one syllable; (d), Time/Frequency Spectrogram, 5 s; (e), Frequency/Sound Pressure analysis, spot in one syllable.
FIGURE 13 in A taxonomic revision of the Palaearctic genus Roeseliana (Orthoptera: Tettigoniidae: Tettigoniinae: Platycleidini): a case of ongoing Mediterranean speciation
FIGURE 13. Roeseliana ambitiosa from Greece, calling song: (a), Sound Pressure Envelope, 5 s; (b), Sound Pressure Envelope, 0.25 s; (c), Pulses (tooth strikes), one syllable; (d), Time/Frequency Spectrogram, 5 s; (e), Frequency/Sound Pressure analysis, spot in one syllable.
FIGURE 9 in A taxonomic revision of the Palaearctic genus Roeseliana (Orthoptera: Tettigoniidae: Tettigoniinae: Platycleidini): a case of ongoing Mediterranean speciation
FIGURE 9. Ventral view of the female subgenital plate of other two taxa of Roeseliana (different populations).
FIGURE 2 in A taxonomic revision of the Palaearctic genus Roeseliana (Orthoptera: Tettigoniidae: Tettigoniinae: Platycleidini): a case of ongoing Mediterranean speciation
FIGURE 2. Ovipositor of three other taxa of Roeseliana (different populations) in lateral view. In 2a the method to measure the angle between the base of the ovipositor and a line intersected between it and the ovipositor tip (named "ovipositor angle" in the text) is explained.
FIGURE 16 in A taxonomic revision of the Palaearctic genus Roeseliana (Orthoptera: Tettigoniidae: Tettigoniinae: Platycleidini): a case of ongoing Mediterranean speciation
FIGURE 16. Roeseliana brunneri from Valli di Chioggia, calling song: (a), Sound Pressure Envelope, 5 s; (b), Sound Pressure Envelope, 0.2 s; (c), Pulses (tooth strikes), one syllable; (d), Time/Frequency Spectrogram, 6 s; (e), Frequency/Sound Pressure analysis, spot in one syllable.
FIGURE 12 in A taxonomic revision of the Palaearctic genus Roeseliana (Orthoptera: Tettigoniidae: Tettigoniinae: Platycleidini): a case of ongoing Mediterranean speciation
FIGURE 12. Roeseliana ambitiosa from Bulgaria, calling song: (a), Sound Pressure Envelope, 5 s; (b), Sound Pressure Envelope, 5 s; (c), Pulses (tooth strikes), one syllable; (d), Time/Frequency Spectrogram, 6 s; (e), Frequency/Sound Pressure analysis, spot in one syllable.
FIGURE 20 in A taxonomic revision of the Palaearctic genus Roeseliana (Orthoptera: Tettigoniidae: Tettigoniinae: Platycleidini): a case of ongoing Mediterranean speciation
FIGURE 20. Syllable comparison: (a), ambitiosa from Bulgaria; (b), ambitiosa from Greece; (c), azami minor from Switzerland; (d) azami from Cote d'Azur, France; (e), brunneri from Valli di Chioggia, Italy; (f), brunneri from Valle dell'Ortazzo, Italy; (g), roeselii from Alps, Italy; (h), roeselii from Netherlands.
FIGURE 1 in A taxonomic revision of the Palaearctic genus Roeseliana (Orthoptera: Tettigoniidae: Tettigoniinae: Platycleidini): a case of ongoing Mediterranean speciation
FIGURE 1. Ovipositor of five taxa of Roeseliana in lateral view. In 1c the method to take three measures of the depth of the ovipositor (named "ovipositor depth" in the text) is explained.
FIGURE 15. Roeseliana azami from Cote d in A taxonomic revision of the Palaearctic genus Roeseliana (Orthoptera: Tettigoniidae: Tettigoniinae: Platycleidini): a case of ongoing Mediterranean speciation
FIGURE 15. Roeseliana azami from Cote d'Azur, calling song: (a), Sound Pressure Envelope, 5 s; (b), Sound Pressure Envelope, 0.25 s; (c), Pulses (tooth strikes), one syllable; (d), Time/Frequency Spectrogram, 4 s; (e), Frequency/Sound Pressure analysis, spot in one syllable.
FIGURE 7 in A taxonomic revision of the Palaearctic genus Roeseliana (Orthoptera: Tettigoniidae: Tettigoniinae: Platycleidini): a case of ongoing Mediterranean speciation
FIGURE 7. Dorsal view of the male supragenital plate and cerci of other four taxa of Roeseliana and three different populations of R. azami minor.
FIGURE 19 in A taxonomic revision of the Palaearctic genus Roeseliana (Orthoptera: Tettigoniidae: Tettigoniinae: Platycleidini): a case of ongoing Mediterranean speciation
FIGURE 19. Roeseliana roeselii from Netherlands, calling song: (a), Sound Pressure Envelope, 5s; (b), Sound Pressure Envelope, 0.2 s; (c), Pulses (tooth strikes), one syllable; (d), Time/Frequency Spectrogram, 5s; (e), Frequency/Sound Pressure analysis, spot in one syllable.
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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.