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196 results for “population comparison”
FIGURE 2 in Genetic comparison of populations of Piaractus brachypomus and P. orinoquensis (Characiformes: Serrasalmidae) of the Amazon and Orinoco basins
FIGURE 2 | Haplotype genealogies of Piaractus brachypomus. The circle size is proportional to the haplotype frequency. Each line represents a single mutation. Colors correspond to localities.
FIGURE 1 in Genetic comparison of populations of Piaractus brachypomus and P. orinoquensis (Characiformes: Serrasalmidae) of the Amazon and Orinoco basins
FIGURE 1 | Map of the study area for sampling sites for Piaractus brachypomus and P. orinoquensis samples. The number inside the circle indicates the sampling location. The green circle indicates the samples that were analyzed for nDNA and the blue circle the samples analyzed with nDNA and mDNA. Orinoco basin (1. San José del Guaviare, 2. Puerto López, 3. Puerto Carreño, 4. San Fernando de Apure, 5. San Felix). Amazon basin (1. Guajará-Mirim, 2. Boca do Acre, 3. Leticia, 4. La Pedrera, 5. Cidade Japurá, 6. Parimé River, 7. Humaitá, 8. Cidade Juruá, 9. Tefé, 10. Beruri, 11. Janauacá, 12. Borba, 13. Itaituba. 14. Óbidos, 15. Santarém).
FIGURE 5 in Genetic comparison of populations of Piaractus brachypomus and P. orinoquensis (Characiformes: Serrasalmidae) of the Amazon and Orinoco basins
FIGURE 5 | Discriminant analysis of principal components (DAPC) based in seven microsatellite loci of 300 individuals of Piaractus brachypomus.
FIGURE 4 in Genetic comparison of populations of Piaractus brachypomus and P. orinoquensis (Characiformes: Serrasalmidae) of the Amazon and Orinoco basins
FIGURE 4 | A. Barplots created from Structure representing assignments of genotypes to each local population for Piaractus brachypomus, the blue color cluster represents individuals related to the Amazon sedimentary basin and the purple color cluster represents individuals related to the crystalline shields of the Amazon basin. B. Barplots hierarchical from crystalline shields of the Amazon basin.
FIGURE 4 in Population structuration and chromosomal features homogeneity in Parodon nasus (Characiformes: Parodontidae): A comparison between Lower and Upper Paraná River representatives
FIGURE 4 | Molecular data of Parodon nasus from La Plata basin. A. Haplotype network showing the relationship among the sequences. B. Structural population inference by BAPs (K = 2) for the four populations showing the division between Upper and Lower Paraná River systems; C. Bayesian inference tree showing the phylogenetic relationship of the sequences (numbers on the branches correspond to posterior probability; numbers in parentheses correspond to specimen voucher ID).
FIGURE 3 in Population structuration and chromosomal features homogeneity in Parodon nasus (Characiformes: Parodontidae): A comparison between Lower and Upper Paraná River representatives
FIGURE 3 | Karyotypes of the four populations of Parodon nasus submitted to fluorescence in situ hybridization using 18S rDNA (green signal) and 5S rDNA (red signal) probes. Chromosomes with signals for the pPh2004 probe were highlighted in boxes. A. Cuiabá River; B. Mogi-Guaçu River; C. Passa Cinco River; D. Paiol Grande stream. Scale bar = 10µm.
FIGURE 1 in Population structuration and chromosomal features homogeneity in Parodon nasus (Characiformes: Parodontidae): A comparison between Lower and Upper Paraná River representatives
FIGURE 1 | A. Adult specimen of Parodon nasus. B. Partial map of the South America showing the La Plata basin, the principal rivers of the basin, and the collection sites of the P. nasus species analyzed.
FIGURE 2 in Population structuration and chromosomal features homogeneity in Parodon nasus (Characiformes: Parodontidae): A comparison between Lower and Upper Paraná River representatives
FIGURE 2 | Karyotypes of the four populations of Parodon nasus submitted to the C-banding procedure. A. Cuiabá River; B. Mogi-Guaçu River; C. Passa Cinco River; D. Paiol Grande stream. Scale bar = 10µm.
Within and between population comparisons suggest independently acting selection maintaining parallel clines in Scots pine (Pinus sylvestris)
<p>Parallel clines in traits related to adaptation in a species can be due to independent selection on a pair of traits, or due to selection in one trait resulting in a parallel cline in a correlated trait. To distinguish between the mechanisms giving rise to parallel adaptive population divergence of multiple traits along an environmental gradient we need to study variation, correlations, and selective forces within individual populations along the gradient. In many tree species, budset timing forms a latitudinal cline, and parallel clinal variation is also found in other seedling traits, such as first year height and fall frost injury. In this study, we set up a common garden experiment with open pollinated progeny from natural populations of Scots pine (<em>Pinus sylvestris</em>), with one large sample from single population (500 families) and smaller samples from across a latitudinal gradient. Budset timing, first year height and induced fall frost injury were first measured in a greenhouse. The seedlings were then planted in the field, where survival and height were measured at the age of nine years as fitness proxies. We compared between and within population variation and genetic correlations of these three seedling traits, and estimated selection gradients at the family level in our main population, taking into account the potential effects of seed weight. Between population genetic correlations between seedling traits were high (0.76-0.95). Within population genetic correlations in the main population were lower (0.14-0.35), as in other populations (0.10-0.39). Within population, extensive adaptive variation persists in the seedling traits, in line with rather weak selection gradients, yet maintaining the clines. Although our sampling does not cover the whole cline equally, the results suggest that the individual clines in these traits are maintained by largely independently acting selection, which results in fewer constraints in adaptation under changing climate.</p>
High quality, chromosome-scale genome assemblies: Comparisons of three Diaphorina citri (Asian Citrus Psyllid) geographic populations
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Comparison of fresh fecal samples from two populations (NAM and USA) (Part 2 of 2)
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Data from: The temporal window of ecological adaptation in postglacial lakes: a comparison of head morphology, trophic position and habitat use in Norwegian threespine stickleback populations
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Within and between population comparisons suggest independently acting selection maintaining parallel clines in Scots pine (Pinus sylvestris)
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A comparison of density estimation methods for monitoring marked and unmarked animal populations
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An assemblage-level comparison of genetic diversity and population genetic structure between island and mainland ant populations
<p>Island biotas provide unparalleled opportunities to examine evolutionary processes. Founder effects and bottlenecks, for example, typically decrease genetic diversity in island populations, while selection for reduced dispersal can increase population structure. Given that support for these generalities mostly comes from single-species analyses, assemblage-level comparisons are needed to clarify how (i) colonization affects the gene pools of interacting insular organisms, and (ii) patterns of genetic differentiation vary within assemblages of organisms. Here, we use genome-wide sequence data from ultraconserved elements (UCEs) to compare genetic diversity and population structure of mainland and island populations of nine ant species in coastal southern California with respect to genetic diversity and population structure. As expected, island populations (from Santa Cruz Island) had lower than expected heterozygosity and Watterson's theta compared to mainland populations (from the Lompoc Valley). Island populations, however, exhibited smaller genetic distances among samples, indicating less population subdivision and a higher capacity for dispersal compared to mainland populations. Within the focal assemblage, pairwise F<sub>st</sub> values revealed pronounced interspecific variation in mainland-island differentiation, which increases with gyne body size. Our results reveal differences in genetic diversity and population genetic structure across an assemblage of interacting species, and illuminate general patterns of insularization in ants. Compared to single-species studies, our analysis of nine species pairs from the same island-mainland system offers a powerful approach to studying fundamental evolutionary processes.</p>
Comparison of the Skin Conductance Algesimeter and the Nociception Level Index in the Paediatric Population. An Observational Study.
ClinicalTrials.gov study NCT05998564. IPD Sharing: UNDECIDED. Countries: 1. Publications: 20.
A Comparison of Sequential Compression Devices and Foot Pumps in the Obstetric Population
ClinicalTrials.gov study NCT00356434. IPD Sharing: Not stated. Countries: 1. Publications: 1.
An assemblage-level comparison of genetic diversity and population genetic structure between island and mainland ant populations
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Data from: An empirical comparison of SNPs and microsatellites for parentage and kinship assignment in a wild sockeye salmon (Oncorhynchus nerka) population
Because of their high variability, microsatellites are still considered the marker of choice for studies on parentage and kinship in wild populations. Nevertheless, single nucleotide polymorphisms (SNPs) are becoming increasing popular in many areas of molecular ecology, owing to their high-throughput, easy transferability between laboratories and low genotyping error. An ongoing discussion concerns the relative power of SNPs compared to microsatellites – that is, how many SNP loci are needed to replace a panel of microsatellites? Here, we evaluate the assignment power of 80 SNPs (HE=0.30, 80 independent alleles) and 11 microsatellites (HE =0.85, 194 independent alleles) in a wild population of about 400 sockeye salmon with two commonly used software packages (Cervus3, Colony2) and, for SNPs only, a newly developed software (SNPPIT). Assignment success was higher for SNPs than for microsatellites, especially for parent pairs, irrespective of the method used. Colony2 assigned a larger proportion of offspring to at least one parent than the other methods, though Cervus and SNPPIT detected more parent pairs. Identification of full sib groups without parental information from relatedness measures was possible using both marker systems, though explicit reconstruction of such groups in Colony2 was impossible for SNPs because of computation time. Our results confirm the applicability of SNPs for parentage analyses and refute the predictability of assignment success from the number of independent alleles.
Data from: Comparison of reproductive investment in native and non-native populations of common wall lizards reveals sex differences in adaptive potential.
Non-native animals can encounter very different environments than those they are adapted to. Functional changes in morphology, physiology and life-history following introduction show that organisms can adapt both fast and efficiently. It remains unclear, however, if female reproductive characters and male sexually selected behaviour show the same adaptive potential. Furthermore, the invasion success and evolutionary trajectory of non-native species might often depend on the ability of the sexes to coordinate shifts in characters associated with reproductive strategy. The common wall lizard, Podarcis muralis, has been repeatedly introduced from Southern Europe to England over the past 80 years. Lizards in England experience a cool, seasonal climate that effectively restricts recruitment to the first clutch of the season, whereas in their native range up to three clutches per season recruit. As a consequence, both females and males in non-native populations should benefit from reducing or even eliminating their reproductive investment in second clutches. Using a combination of field data and experiments, we show that non-native females produce relatively larger and heavier first seasonal clutches and smaller and lighter second seasonal clutches compared to native females. In contrast, non-native and native males do not differ in their territorial and sexual behaviour later in the season. An adaptive shift in male seasonal reproductive investment may be constrained because males use breeding females as cues for sexual behaviour. If this is so, we expect a general pattern across climatic regimes whereby female reproductive investment evolves first, with responses in males lagging behind.
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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.