Opsin gene evolution in amphibious and terrestrial combtooth blennies (Blenniidae)

Cortesi, Fabio; Cheney, Karen L.; Cooke, Georgina M.; Ord, Terry J.

doi:10.1101/503516

Cited by 4 publications

(1 citation statement)

References 78 publications

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“…However, long‐wavelength‐sensitivity may not only facilitate algal detection but may be beneficial for benthic feeding more generally. For example, lws is highly expressed in several blennies that feed predominantly on detritus or benthic algae (Cortesi et al, 2019).…”

Section: Discussionmentioning

confidence: 99%

Long‐wavelength‐sensitive (lws) opsin gene expression, foraging and visual communication in coral reef fishes

et al. 2023

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Coral reef fishes are diverse in ecology and behaviour and show remarkable colour variability. Investigating the visual pigment gene (opsin) expression in these fishes makes it possible to associate their visual genotype and phenotype (spectral sensitivities) to visual tasks, such as feeding strategy or conspecific detection. By studying all major damselfish clades (Pomacentridae) and representatives from five other coral reef fish families, we show that the long-wavelength-sensitive (lws) opsin is highly expressed in algivorous and less or not expressed in zooplanktivorous species. Lws is also upregulated in species with orange/red colours (reflectance >520 nm) and expression is highest in orange/red-coloured algivores. Visual models from the perspective of a typical damselfish indicate that sensitivity to longer wavelengths does enhance the ability to detect the red to far-red component of algae and orange/red-coloured conspecifics, possibly enabling social signalling. Character state reconstructions indicate that in the early evolutionary history of damselfishes, there was no lws expression and no orange/red coloration. Omnivory was most often the dominant state. Although herbivory was sometimes dominant, zooplanktivory was never dominant. Sensitivity to long wavelength (increased lws expression) only emerged in association with algivory but never with zooplanktivory. Higher lws expression is also exploited by social signalling in orange/red, which emerged after the transition to algivory. Although the relative timing of traits may deviate by different reconstructions and alternative explanations are possible, our results are consistent with sensory bias whereby social signals evolve as a correlated response to natural selection on sensory system properties in other contexts.

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Section: Discussionmentioning

confidence: 99%

Long‐wavelength‐sensitive (lws) opsin gene expression, foraging and visual communication in coral reef fishes

et al. 2023

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Spatial mapping influences navigation in Entomacrodus striatus

Buo

Taylor

Dayal

et al. 2020

Marine and Freshwater Behaviour and Physiology

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The Visual Opsin Gene Repertoires of Teleost Fishes: Evolution, Ecology, and Function

Musilová

Salzburger

Cortesi

2021

Annu. Rev. Cell Dev. Biol.

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Visual opsin genes expressed in the rod and cone photoreceptor cells of the retina are core components of the visual sensory system of vertebrates. Here, we provide an overview of the dynamic evolution of visual opsin genes in the most species-rich group of vertebrates, teleost fishes. The examination of the rich genomic resources now available for this group reveals that fish genomes contain more copies of visual opsin genes than are present in the genomes of amphibians, reptiles, birds, and mammals. The expansion of opsin genes in fishes is due primarily to a combination of ancestral and lineage-specific gene duplications. Following their duplication, the visual opsin genes of fishes repeatedly diversified at the same key spectral-tuning sites, generating arrays of visual pigments sensitive from the ultraviolet to the red spectrum of the light. Species-specific opsin gene repertoires correlate strongly with underwater light habitats, ecology, and color-based sexual selection. Expected final online publication date for the Annual Review of Cell and Developmental Biology, Volume 37 is October 2021. Please see http://www.annualreviews.org/page/journal/pubdates for revised estimates.

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Opsin gene evolution in amphibious and terrestrial combtooth blennies (Blenniidae)

Cited by 4 publications

References 78 publications

Long‐wavelength‐sensitive (lws) opsin gene expression, foraging and visual communication in coral reef fishes

Long‐wavelength‐sensitive (lws) opsin gene expression, foraging and visual communication in coral reef fishes

Spatial mapping influences navigation in Entomacrodus striatus

The Visual Opsin Gene Repertoires of Teleost Fishes: Evolution, Ecology, and Function

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