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93 results for “eye evolution”
Data from: Evolution of sex-biased gene expression and dosage compensation in the eye and brain of Heliconius butterflies
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Data from: Keeping an eye on coloration: ecological correlates of the evolution of pitcher traits in the genus Nepenthes (Caryophyllales)
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Data from: Evolution of eye morphology and rhodopsin expression in the Drosophila melanogaster species subgroup
A striking diversity of compound eye size and shape has evolved among insects. The number of ommatidia and their size are major determinants of the visual sensitivity and acuity of the compound eye. Each ommatidium is composed of eight photoreceptor cells that facilitate the discrimination of different colours via the expression of various light sensitive Rhodopsin proteins. It follows that variation in eye size, shape, and opsin composition is likely to directly influence vision. We analyzed variation in these three traits in D. melanogaster, D. simulans and D. mauritiana. We show that D. mauritiana generally has larger eyes than its sibling species, which is due to a combination of larger ommatidia and more ommatidia. In addition, intra- and inter-specific differences in eye size among D. simulans and D. melanogaster strains are mainly caused by variation in ommatidia number. By applying a geometric morphometrics approach to assess whether the formation of larger eyes influences other parts of the head capsule, we found that an increase in eye size is associated with a reduction in the adjacent face cuticle. Our shape analysis also demonstrates that D. mauritiana eyes are specifically enlarged in the dorsal region. Intriguingly, this dorsal enlargement is associated with enhanced expression of rhodopsin 3 in D. mauritiana. In summary, our data suggests that the morphology and functional properties of the compound eyes vary considerably within and among these closely related Drosophila species and may be part of coordinated morphological changes affecting the head capsule.
Data from: Evolution of static allometries: adaptive change in allometric slopes of eye span in stalk-eyed flies
Julian Huxley showed that within-species (static) allometric (power-law) relations can arise from proportional growth regulation with the exponent in the power law equaling the factor of proportionality. Allometric exponents may therefore be hard to change and act as constraints on the independent evolution of traits. In apparent contradiction to this, many empirical studies have concluded that static allometries are evolvable. Many of these studies have been based, however, on a broad definition of allometry that includes any monotonic shape change with size, and do not falsify the hypothesis of constrained narrow-sense allometry. Here, we present the first phylogenetic comparative study of narrow-sense allometric exponents based on a reanalysis of data on eye span and body size in stalk-eyed flies (Diopsidae). Consistent with a role in sexual selection, we found strong evidence that male slopes were tracking "optima" based on sexual dimorphism and relative male trait size. This tracking was slow, however, with estimated times of 2-3 million years for adaptation to exceed ancestral influence on the trait. Our results are therefore consistent with adaptive evolution on million-year time scales, but cannot rule out that static allometry may act as a constraint on eye-span adaptation at shorter time scales.
FIGURE 10 in A new species of bright-eyed treefrog (Mantellidae) from Madagascar, with comments on call evolution and patterns of syntopy in the Boophis ankaratra complex
FIGURE 10. Dorsal pattern and color variation of six living specimens of Boophis boppa.
Fig. 16 in Evolution of genital asymmetry, exaggerated eye stalks, and extreme palpal elongation in Panjange spiders (Araneae: Pholcidae)
Fig. 16. Known distribution of the Panjange lanthana group.
Data from: Pigmented anatomy in Carboniferous cyclostomes and the evolution of the vertebrate eye
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Data from: Evolution of static allometries: adaptive change in allometric slopes of eye span in stalk-eyed flies
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Data from: Evolution of eye morphology and rhodopsin expression in the Drosophila melanogaster species subgroup
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Of eyes and embryos; subfunctionalization of the CRX homeobox gene in mammalian evolution
GEO Series GSE129456. Mus musculus. 9 samples. Type: Expression profiling by high throughput sequencing.
Evolution of the eye transcriptome under constant darkness in Sinocyclocheilus cavefish
GEO Series GSE40446. Sinocyclocheilus anophthalmus; Sinocyclocheilus angustiporus. 4 samples. Type: Expression profiling by high throughput sequencing.
Postoperative Evolution After Small Gauge Vitrectomy Without Eye Occlusion
ClinicalTrials.gov study NCT01023009. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Fig. 1 in Impact of habitat and life trait on character evolution of pallial eyes in Pectinidae (Mollusca: bivalvia)
Fig. 1 Schematic drawing of a pectinid eye. c Cornea, ct connective tissue, d distal chamber, dr distal retina, es eyestalk, l lens, mv microvilli region of proximal retina, p pallial pigment epithelium, pl pigment layer, pr proximal retina, t tapetum
ScienceDex guides
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These curated guides explain access requirements, typical timelines, costs, and reuse considerations for widely used research datasets.
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.