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222 results for “ancient lake”
FIGURE 9 in Diversification in ancient Lake Biwa: integrative taxonomy reveals overlooked species diversity of the Japanese freshwater snail genus Semisulcospira (Mollusca: Semisulcospiridae)
FIGURE 9 Shells of Semisulcospira watanabei sp. nov. A–G, Holotype, KUZ Z4109. H–J, Paratype, KUZ Z4110. K–L, Paratype, KUZ Z4114. M–N. Specimen from Oura, KUZ Z4117. O–Q, Specimen from Nihonmatsu, KUZ Z4118. R–T, Specimen from Horikiri Port, KUZ Z4120. A–C, H, K, M, O, R, Adult shell. A–C, H, O, R, Female. K, Male. M, Juvenile. D, I, L, N, P, S, Operculum. E–G, J, Q, T, Embryonic shell. Scale bars: 10 mm (A–D, H–I, K–L, M–N, O–P, R–S), 1 mm (E–G, J, Q, T). All specimens were treated with 3% sodium hypochlorite
FIGURE 7 in Diversification in ancient Lake Biwa: integrative taxonomy reveals overlooked species diversity of the Japanese freshwater snail genus Semisulcospira (Mollusca: Semisulcospiridae)
FIGURE 7 Results of Random Forest analyses conducted for five Semisulcospira species. Euclidean distances generated from proximities among individuals are plotted. A, Female. B, Male
FIGURE 6 in Diversification in ancient Lake Biwa: integrative taxonomy reveals overlooked species diversity of the Japanese freshwater snail genus Semisulcospira (Mollusca: Semisulcospiridae)
FIGURE 6 Map of Lake Biwa indicating geographical variation in the frequency of sculpture types in the adult females of five Semisulcospira species. Colours of locality names correspond to the colour coding in fig. 1
FIGURE 4 in Diversification in ancient Lake Biwa: integrative taxonomy reveals overlooked species diversity of the Japanese freshwater snail genus Semisulcospira (Mollusca: Semisulcospiridae)
FIGURE 4 Results of ADMIXTURE analysis based on 738 SNP s conducted for five Semisulcospira species. Bar colours of the species in K = 5 correspond to the colour coding in fig. 3
FIGURE 5 in Diversification in ancient Lake Biwa: integrative taxonomy reveals overlooked species diversity of the Japanese freshwater snail genus Semisulcospira (Mollusca: Semisulcospiridae)
FIGURE 5 Phylogenetic relationships of five Semisulcospira species estimated by the Neighbor-Net reconstructed based on uncorrected p-distances of 738 SNP s
FIGURE 3 in Diversification in ancient Lake Biwa: integrative taxonomy reveals overlooked species diversity of the Japanese freshwater snail genus Semisulcospira (Mollusca: Semisulcospiridae)
FIGURE 3 Results of principal components analysis based on 738 SNP s conducted for five Semisulcospira species. A, Principal component (PC) 1 vs PC 2. B, PC2 vs PC3. C, PC 3 vs PC4. D, PC4 vs PC5
FIGURE 2 in Diversification in ancient Lake Biwa: integrative taxonomy reveals overlooked species diversity of the Japanese freshwater snail genus Semisulcospira (Mollusca: Semisulcospiridae)
FIGURE 2 Schematic drawings representing shell measurements of Semisulcospira species in this study. A, Spire angle (SA) and aperture swell length (ASL) of adult shell. B–D, Criteria for types of sculptures
FIGURE 1 in Diversification in ancient Lake Biwa: integrative taxonomy reveals overlooked species diversity of the Japanese freshwater snail genus Semisulcospira (Mollusca: Semisulcospiridae)
FIGURE 1 Map of Lake Biwa (A) and Oura Bay (B) showing 15 sampling localities: blue, Semisulcospira niponica; green, S. fuscata; purple, S. watanabei sp. nov.; red, S. nakanoi sp. nov.; orange, S. salebrosa sp. nov; black, putative hybrid between S. fuscata and S. watanabei sp. nov.
FIGURE 10 in Diversification in ancient Lake Biwa: integrative taxonomy reveals overlooked species diversity of the Japanese freshwater snail genus Semisulcospira (Mollusca: Semisulcospiridae)
FIGURE 10 Shells of Semisulcospira nakanoi sp. nov. A–G, Holotype, KUZ Z4122. H–J, Paratype, KUZ Z4125. K–L, Paratype, KUZ Z4126. M–Q, Specimens from Onoe Port, KUZ Z4129, Z4130. A–C, H, K, M, P, Adult shell. A–C, H, M, Female. K, P, Male. D, I, L, N, Q, Operculum. E–G, J, O, Embryonic shell. Scale bars: 10 mm (A–D, H–I, K–L, M–N, P–Q), 1 mm (E–G, J, O). All specimens were treated with 3% sodium hypochlorite
FIGURE 12 in Diversification in ancient Lake Biwa: integrative taxonomy reveals overlooked species diversity of the Japanese freshwater snail genus Semisulcospira (Mollusca: Semisulcospiridae)
FIGURE 12 Radulae of Semisulcospira species. A–G, Semisulcospira niponica: A, Oura Port, KUZ Z4091; B, Nagahama Port, KUZ Z4093; C, Iso, KUZ Z4095; D, Kitakomatsu Port, KUZ Z4097; E, Katata Port, KUZ Z4099; F, Otsu Port, KUZ Z4101; G, Nango, KUZ Z4103. H–J, Semisulcospira fuscata: H, Lake Yogo, KUZ Z4103; I, Oura, KUZ Z4105; J, Nihonmatsu, KUZ Z4107. K–L, Semisulcospira watanabei sp. nov.: K, Kitakomatsu Port, KUZ Z4115; L, Horikiri Port, KUZ Z4120. M–N, Semisulcospira nakanoi sp. nov.: M, Onoe Port, KUZ Z4129; N, Chikubu-shima Island, KUZ Z4127. O–P, Semisulcospira salebrosa sp. nov.: O, Take-shima Island, KUZ Z4138; P, Shiraishi-jima Island, KUZ Z4136. Scale bars: 100 Μm
Permafrost-thaw lake development in Central Yakutia: sedimentary ancient DNA and element analyses from a Holocene sediment record
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Data from: Evidence for hybridisation-driven heteroplasmy maintained across generations in a ricefish endemic to a Wallacean ancient lake
<p><span>Heteroplasmy, </span><span>the presence of multiple mitochondrial DNA (mtDNA) haplotypes within cells of an individual,</span><span> is caused by mutation or paternal leakage. However, heteroplasmy is usually resolved to homoplasmy within a few generations because of germ-line bottlenecks; therefore, instances of heteroplasmy are limited in nature. Here, we report </span><span>heteroplasmy in the ricefish species <em>Oryzias matanensis</em>, endemic to Lake Matano, an ancient lake in Sulawesi Island, in which one individual was known to have many heterozygous sites in the <span class="shorttext">mitochondrial NADH dehydrogenase subunit 2 (ND2) gene</span>. </span><span>In this study, </span><span>we cloned the ND2 gene for some additional individuals with heterozygous sites and demonstrated that they are truly heteroplasmic. Phylogenetic analysis revealed that the extra haplotype within the heteroplasmic <em>O. matanensis</em> individuals clustered with haplotypes of </span><em><span>O. marmoratus</span></em><span>, a congeneric species inhabiting adjacent lakes. This indicated that the heteroplasmy originated from paternal leakage due to interspecific hybridisation. </span><span>The extra haplotype was unique and contained </span><span>t</span><span>wo</span><span> nonsynonymous substitutions. </span><span>These findings demonstrate that this hybridisation-driven heteroplasmy was maintained across generations for a long time to the extent that the extra mitochondria evolved within the new host.</span></p>
Fig. 58 in Radiation Of Endemic Species Flocks In Ancient Lakes: Systematic Revision Of The Freshwater Shrimp Caridina H. Milne Edwards, 1837 (Crustacea: Decapoda: Atyidae) From The Ancient Lakes Of Sulawesi, Indonesia, With The Description Of Eight New Species
Fig. 58. Distribution of Caridina sarasinorum in Lake Poso.
Fig. 60 in Radiation Of Endemic Species Flocks In Ancient Lakes: Systematic Revision Of The Freshwater Shrimp Caridina H. Milne Edwards, 1837 (Crustacea: Decapoda: Atyidae) From The Ancient Lakes Of Sulawesi, Indonesia, With The Description Of Eight New Species
Fig. 60. Distribution of Caridina schenkeli in the Poso catchment.
Fig. 48 in Radiation Of Endemic Species Flocks In Ancient Lakes: Systematic Revision Of The Freshwater Shrimp Caridina H. Milne Edwards, 1837 (Crustacea: Decapoda: Atyidae) From The Ancient Lakes Of Sulawesi, Indonesia, With The Description Of Eight New Species
Fig. 48. Distribution of Caridina acutirostris in the Poso catchment.
Fig. 20 in Radiation Of Endemic Species Flocks In Ancient Lakes: Systematic Revision Of The Freshwater Shrimp Caridina H. Milne Edwards, 1837 (Crustacea: Decapoda: Atyidae) From The Ancient Lakes Of Sulawesi, Indonesia, With The Description Of Eight New Species
Fig. 20. Distribution of Caridina mahalona in the Malili lake system and the Tomori area.
Fig. 24 in Radiation Of Endemic Species Flocks In Ancient Lakes: Systematic Revision Of The Freshwater Shrimp Caridina H. Milne Edwards, 1837 (Crustacea: Decapoda: Atyidae) From The Ancient Lakes Of Sulawesi, Indonesia, With The Description Of Eight New Species
Fig. 24. Distribution of Caridina masapi in the Malili lake system.
Fig. 27 in Radiation Of Endemic Species Flocks In Ancient Lakes: Systematic Revision Of The Freshwater Shrimp Caridina H. Milne Edwards, 1837 (Crustacea: Decapoda: Atyidae) From The Ancient Lakes Of Sulawesi, Indonesia, With The Description Of Eight New Species
Fig. 27. Distribution of Caridina parvula in the Malili lake system.
Ghost introgression in ricefishes of the genus Adrianichthys in an ancient Wallacean lake
<p><span>Because speciation might have been promoted by ancient introgression from an extinct lineage, it is important to detect the existence of "ghost introgression" in focal taxa and examine its contribution to their diversification. In this study, we examined possible ghost introgression and its contributions to the diversification of ricefishes of the genus <em>Adrianichthys</em>in Lake Poso, an ancient lake on Sulawesi Island, in which some extinctions are known to have occurred. Population genomic analysis revealed that two extant <em>Adrianichthys</em> species, <em>A. oophorus</em> and <em>A. poptae</em>, are reproductively isolated from each other. Comparisons of demographic models demonstrated that introgression from a ghost population, which diverged from the common ancestor of <em>A. oophorus</em> and <em>A. poptae</em>, is essential for reconstructing the demographic history of <em>Adrianichthys</em>. The best model estimated that the divergence of the ghost population greatly predated the divergence between <em>A. oophorus</em> and <em>A. poptae</em>, and that the ghost population secondarily contacted the two extant species within Lake Poso more recently. Genome scans and simulations detected a greatly divergent locus, which cannot be explained without ghost introgression. This locus was also completely segregated between <em>A. oophorus</em> and <em>A. poptae</em>. These findings suggest that variants that came from a ghost population have contributed to the divergence between <em>A. oophorus</em>and <em>A. poptae</em>, but the large time-lag between their divergence and ghost introgression indicates that the contribution of introgression may be restricted.</span></p>
Fungus and plant sedimentary ancient DNA metabarcoding data from five lakes in Siberia
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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.