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84 results for “colour variation”
Data from: Life-history trade-offs mediate 'personality' variation in two colour morphs of the pea aphid, Acyrthosiphon pisum
(1) Life-history trade-offs are considered a major driving force in the emergence of consistent behavioural differences (personality variation); but empirical tests are scarce. (2) We investigated links between a personality trait (escape response), life-history and state variables (growth rate, size and age at first reproduction, age-dependent reproductive rates, lifetime reproductive success, lifespan) in red and green colour morphs of clonal pea aphids, Acyrthosiphon pisum. Escape response (dropping/non-dropping off a plant upon a predatory attack) was measured repeatedly to classify individuals as consistent droppers, consistent non-droppers or inconsistents. (3) Red morphs experienced stronger trade-offs between early reproduction and lifespan than green morphs; and red consistent (non-)droppers had highest lifetime reproductive success. Red droppers followed a risk-averse life-history strategy (high late reproduction), red non-droppers a risk-prone strategy (high early reproduction), while reproductive rates were equivalent for all green behavioural types and red inconsistents. (4) This suggests that red morphs suffer the highest costs of dropping (they are most conspicuous to predators), which 'equivalates' fitness payoffs to both risk-takers (red non-droppers) and risk-averse red droppers. The strong trade-off also means that committing to a particular lifestyle (being consistent) maximises fitness. (5) Our study suggests that life-history trade-offs likely mediate personality variation but effects might depend on interactions with other organismal characteristics (here: colour morph).
Data from: Heritable variation in colour patterns mediating individual recognition
Understanding the developmental and evolutionary processes that generate and maintain variation in natural populations remains a major challenge for modern biology. Populations of Polistes fuscatus paper wasps have highly variable colour patterns that mediate individual recognition. Previous experimental and comparative studies have provided evidence that colour pattern diversity is the result of selection for individuals to advertise their identity. Distinctive identity-signalling phenotypes facilitate recognition, which reduces aggression between familiar individuals in P. fuscatus wasps. Selection for identity signals may increase phenotypic diversity via two distinct modes of selection that have different effects on genetic diversity. Directional selection for increased plasticity would greatly increase phenotypic diversity but decrease genetic diversity at associated loci. Alternatively, heritable identity signals under balancing selection would maintain genetic diversity at associated loci. Here, we assess whether there is heritable variation underlying colour pattern diversity used for facial recognition in a wild population of P. fuscatus wasps. We find that colour patterns are heritable and not Mendelian, suggesting that multiple loci are involved. Additionally, patterns of genetic correlations among traits indicated that many of the loci underlying colour pattern variation are unlinked and independently segregating. Our results support a model where the benefits of being recognizable maintain genetic variation at multiple unlinked loci that code for phenotypic diversity used for recognition.
Data from: The genetic basis of discrete and quantitative colour variation in the polymorphic lizard, Ctenophorus decresii
Background: Colour polymorphic species provide invaluable insight into processes that generate and maintain intra-specific variation. Despite an increasing understanding of the genetic basis of discrete morphs, sources of colour variation within morphs remain poorly understood. Here we use the polymorphic tawny dragon lizard Ctenophorus decresii to test simple Mendelian models for the inheritance of discrete morphs, and to investigate the genetic basis of continuous variation among individuals across morphs. Males of this species express either orange, yellow, orange surrounded by yellow, or grey throats. Although four discrete morphs are recognised, the extent of orange and yellow varies greatly. We artificially elevated testosterone in F0 females and F1 juveniles to induce them to express the male throat colour polymorphism, and quantified colour variation across the pedigree. Results: Inheritance of discrete morphs in C. decresii best fit a model whereby two autosomal loci with complete dominance respectively determine the presence of orange and yellow. However, a single locus model with three co-dominant alleles for orange, yellow and grey could not be definitively rejected. Additionally, quantitative expression of the proportion of orange and yellow on the throat was strongly heritable (orange: h2 = 0.84 ± 0.14; yellow: h2 = 0.67 ± 0.19), with some evidence for covariance between the two. Conclusions: Our study supports the theoretical prediction that polymorphism should be governed by few genes of major effect, but implies broader genetic influence on variation in constituent morph traits.
FIGURE 4. A B. terricola-like young queen offspring from a B in Discrimination of the bumble bee species Bombus occidentalis Greene and B. terricola Kirby by morphometric, colour and RAPD variation
FIGURE 4. A B. terricola-like young queen offspring from a B. occidentalis colony.
FIGURE 3 in Discrimination of the bumble bee species Bombus occidentalis Greene and B. terricola Kirby by morphometric, colour and RAPD variation
FIGURE 3. Foundress queen (left) and young queen offspring (right) of B. occidentalis.
Figures 6-12 from: Wang Z, Tong X (2017) Variation in colour markings of an unusual new Asprothrips species from China (Thysanoptera, Thripidae). ZooKeys 716: 19-28. https://doi.org/10.3897/zookeys.716.20952
Figures 6-12 - Asprothrips atermaculosus sp. n. 6 head & pronotum 7 antenna of female 8 antenna of male 9 fore wing of female 10 fore wing of male 11 meso- and metanotum 12 lyre-shaped metathoracic endofurca, female
Figures 2-5 from: Wang Z, Tong X (2017) Variation in colour markings of an unusual new Asprothrips species from China (Thysanoptera, Thripidae). ZooKeys 716: 19-28. https://doi.org/10.3897/zookeys.716.20952
Figures 2-5 - Asprothrips atermaculosus sp. n. 2 female 3 male 4 variation of colour markings on abdominal tergites in "Sanming" population 5 variation of colour markings on abdominal tergites in "Chaling" population.
Figures 17-24 from: Wang Z, Tong X (2017) Variation in colour markings of an unusual new Asprothrips species from China (Thysanoptera, Thripidae). ZooKeys 716: 19-28. https://doi.org/10.3897/zookeys.716.20952
Figures 17-24 - Asprothrips fuscipennis Kudô, 1984, female. 17 female adult 18 head & pronotum 19 meso- and metanotum 20 abdominal tergites VIII–X 21 abdominal tergites IV–VI 22 abdominal sternites VI–VII 23 antenna 24 fore wing.
Figures 13-16 from: Wang Z, Tong X (2017) Variation in colour markings of an unusual new Asprothrips species from China (Thysanoptera, Thripidae). ZooKeys 716: 19-28. https://doi.org/10.3897/zookeys.716.20952
Figures 13-16 - Asprothrips atermaculosus sp. n. 13 abdominal tergites IV–VI, female 14 abdominal tergites VII–X, female 15 abdominal tergites VI–X, male 16 abdominal sternites III–VIII, male
Figure 6 in Redescription of the ocellus-bearing cuskeel Neobythites kenyaensis (Ophidiidae), with new Southeast African records and remarks on intraspecific morphological and colour variation
Figure 6. – Number of dorsal-fin rays in central ocellus spot plotted against latitude and depth in Neobythites kenyaensis. Numbers near symbols indicate multiple numbers of specimens referred to; with reference lines for each symbol.
Figure 2 in Redescription of the ocellus-bearing cuskeel Neobythites kenyaensis (Ophidiidae), with new Southeast African records and remarks on intraspecific morphological and colour variation
Figure 2. – Photographs of fresh specimens of Neobythites kenyaensis. A: SAIAB 98891, 121 mm SL, northern Mozambique (F. Uiblein); B: SAIAB 98891, 101 mm SL, northern Mozambique (F. Uiblein); C: SAIAB 82154, 136 mm SL, southern Mozambique (P.C. Heemstra); D: SAIAB 95778, 148 mm SL, off Durban, South Africa (D. Hayes). The horizontal size bars indicate 20 mm length.
Data from: Life-history trade-offs mediate ‘personality’ variation in two colour morphs of the pea aphid, Acyrthosiphon pisum
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Spatial and temporal variation in prey colour patterns for background-matching across a continuous heterogeneous environment
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Data from: Temperature-driven colour lightness and body size variation scale to local assemblages of European Odonata but are modified by propensity for dispersal
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Data from: Heritable variation in colour patterns mediating individual recognition
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Data from: Using adaptive traits to consider potential consequences of temporal variation in selection: male guppy colour through time and space
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Data from: The genetic basis of discrete and quantitative colour variation in the polymorphic lizard, Ctenophorus decresii
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Geographic variation in body size and plumage colour according to diet composition in a nocturnal raptor
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The genetic basis of structural colour variation in mimetic Heliconius butterflies [erato]
GEO Series GSE190378. Heliconius erato demophoon; Heliconius erato cyrbia. 32 samples. Type: Expression profiling by high throughput sequencing.
Figure 1 from: Wang Z, Tong X (2017) Variation in colour markings of an unusual new Asprothrips species from China (Thysanoptera, Thripidae). ZooKeys 716: 19-28. https://doi.org/10.3897/zookeys.716.20952
Figure 1 - Lophatherum gracile, host plant of Asprothrips atermaculosus sp. n.
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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.