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1,104 results for “morphological variation”
Morphometric and phylogeny data for: Morphology, variation, and systematics of the late Cambrian Laurentian dikelocephalid trilobite Walcottaspis vanhornei
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Natural and anthropogenic sources of habitat variation influence exploration behaviour, stress response, and brain morphology in a coastal fish
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Data from: Bill morphology and neutral genetic structure both predict variation in acoustic signals within a bird population
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Data from: Relaxed selection in evolution of genes regulating limb development gives clue to variation in forelimb morphology of cetaceans and other mammals
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Genetic and morphological data from two bird genera (Cranioleuca and Geospiza) showing continuous variation
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Videos of the new specimens of Helicops boitata (Serpentes: Dipsadidae: Hydropsini), with data on morphological variation and behavior
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High variation in last male sperm precedence and genital morphology in the emerald damselfly Lestes sponsa
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Data from: Characterizing morphological (co)variation using structural equation models: body size, allometric relationships and evolvability in a house sparrow metapopulation
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Abiotic conditions shape spatial and temporal morphological variation in North American birds
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FIGURE 9 in Morphological variation of the widely distributed genus Stenocorse Marsh, 1968 (Hymenoptera: Braconidae: Doryctinae)
FIGURE 9. Discrete characters for Stenocorse sp. 3 from Colombia and Brazil. (a) habitus lateral view, (b) detail of the mesosoma.
Fig. 3 in Morphological and mitochondrial-DNA variation in Rhinolophus rouxii (Chiroptera)
Fig. 3: Ordination of all designated OTU's along the first two discriminant functions from analysis of 57 female specimens. Numbers correspond to OTU means. Lines indicate the extent of scatter of individual specimens. OTU's are listed in Table l
Fig. 8 a in Morphological and mitochondrial-DNA variation in Rhinolophus rouxii (Chiroptera)
Fig. 8 a/ b: (a) Baculum (dorsal and right lateral views) of R. sinicus (HZM.4.l 6294) from Godavari, Nepal. Scale _ 1 mm. (b) Baculum of R. rouxií (lN. 62) from Talewadi, India. Scale = 1 mm.
Fig. 7 a in Morphological and mitochondrial-DNA variation in Rhinolophus rouxii (Chiroptera)
Fig. 7 a / b: (a) Right maxillary dentition and palate of R. sínicus (HZM.21.28153) from Mussoorie, northern India. (b) Right maxillary dentition and palate of R. rouxíí (HZM. 12.25682) from Talewadi, southern India.
Fig. 4 in Morphological and mitochondrial-DNA variation in Rhinolophus rouxii (Chiroptera)
Fig. 4: Geographical representation of clusters E-G from discriminant analysis of female individuals.
Polygenic basis for adaptive morphological variation in a threatened Aotearoa | New Zealand bird, the hihi (Notiomystis cincta)
<p>To predict if a threatened species can adapt to changing selective pressures, it is crucial to understand the genetic basis of adaptive traits, especially in species historically affected by severe bottlenecks. We estimated the heritability of three hihi (<em>Notiomystis cincta</em>) morphological traits known to be under selection: nestling tarsus length, body mass and head-bill length, using 523 individuals and 39,699 single nucleotide polymorphisms (SNPs) from a 50K Affymetrix SNP chip. We then examined the genetic architecture of the traits via chromosome partitioning analyses and genome-wide association scans (GWAS). Heritabilities estimated using pedigree relatedness or genomic relatedness were low. For tarsus length, the proportion of genetic variance explained by each chromosome was positively correlated with its size, and more than one chromosome explained significant variation for body mass and head-bill length. Finally, GWAS analyses suggested many loci of small effect contributing to trait variation for all three traits, although one locus (a SNP within an intron of the transcription factor HEY2) was tentatively associated with tarsus length. Our findings suggest a polygenic nature for the morphological traits, with many small effect size loci contributing to the majority of the variation, similar to results from many other wild populations. However, the small effective population size, polygenic architecture and already low heritabilities suggest that both the total response and rate of response to selection are likely to be limited in hihi.</p>
Comparative analysis of genetic and morphological variation within the Platanthera hyperborea complex (Orchidaceae)
<p>Species complexes present considerable problems for a working taxonomy due to the presence of intraspecific variation, hybridization, polyploidy, and phenotypic plasticity. Understanding evolutionary patterns using molecular markers can allow for a more thorough assessment of evolutionary lineages than traditional morphological markers. In this study, we evaluated genetic diversity and phylogenetic patterns among taxa of the <i>Platanthera hyperborea </i>(Orchidaceae) complex, which includes diploid (<i>Platanthera aquilonis</i>) and polyploid (<i>Platanthera hyperborea</i>,<i> P. huronensis</i>,<i> P. convallariifolia) </i>taxa spanning North America, Greenland, Iceland, and Asia. We found that three floral morphological characters overlap among the polyploid taxa, but the diploid species has smaller flowers. DNA sequence variation in a plastid (<i>rpL16</i> intron) and a nuclear (ITS) marker indicated that at least three diploid species have contributed to the genomes of the polyploid taxa, suggesting all are of allopolyploid origin. <i>Platanthera convallariifolia </i>is most like <i>P. dilatata </i>and <i>P. stricta</i>,<i> </i>whereas <i>P. huronensis </i>and <i>P. hyperborea </i>appear to have originated from crosses of <i>P. dilatata </i>and <i>P. aquilonis</i>. <i>Platanthera huronensis</i>,<i> </i>which is found across North America, has multiple origins and reciprocal maternal parentage from the diploid species. By contrast, <i>P. hyperborea</i>,<i> </i>restricted to Greenland and Iceland, appears to have originated from a small founding population of hybrids in which <i>P. dilatata </i>was the maternal parent. Geographic structure was found among polyploid forms in North America. The area of Manitoba, Canada appears to be a contact zone among geographically diverse forms from eastern and western North America. Given the geographic and genetic variation found, we recommend continued recognition of four green-flowered species within this complex, but caution that there may be additional cryptic taxa within North America.</p>
FIGURE 7 in Emesis planeca n. comb. (Lepidoptera: Riodinidae): a new combination revealed by molecular evidence with a description of its morphological variation
FIGURE 7. Geographic distribution of Emesis planeca n. comb. and other Emesis species in Michoacán, Mexico. Black lines represent state limits.
FIGURE 1. Emesis planeca n in Emesis planeca n. comb. (Lepidoptera: Riodinidae): a new combination revealed by molecular evidence with a description of its morphological variation
FIGURE 1. Emesis planeca n. comb. Dorsal (left) and ventral (right) views. A–F males, G–L females. México: Michoacán: Múgica, El Marqués, 500 m elev. leg. L. L. González Cota. Collection catalog numbers (MZFC LEP): A, 429994; B, 429990; C, 429991; D, 429992; E, 429993; F, 429988; G, 429998; H, 429995; I, 429999; J, 429997; K, 429996; L 354625.
FIGURE 3 in Emesis planeca n. comb. (Lepidoptera: Riodinidae): a new combination revealed by molecular evidence with a description of its morphological variation
FIGURE 3. Wing of Emesis planeca n. comb. FW, forewing; HW, hindwing. Vein abbreviations (black lettering): Sc subcostal, R radial, M median, Cu cubital, A anal. Arrows in dorsal view point at: band of six white spots in the postmedial region and; line of small black dots (six dots in forewing, five dots in hindwing) in the submarginal area.
FIGURE 6 in Emesis planeca n. comb. (Lepidoptera: Riodinidae): a new combination revealed by molecular evidence with a description of its morphological variation
FIGURE 6. Female genitalia of Emesis planeca n. comb. (MZFC LEP 429998). Arrows in ventral and lateral views point at: antrum (wide, strongly sclerotized, and funnel-shaped) and; the single long invaginated signum with numerous tiny spines.
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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.