• Publications
  • Influence
Interspecific and intraspecific views of color signals in the strawberry poison frog Dendrobates pumilio
TLDR
The results indicate that the colors displayed by the various color morphs of D. pumilio are effective signals both to conspecifics and to a model predator.
Visual Biology of Hawaiian Coral Reef Fishes. I. Ocular Transmission and Visual Pigments
TLDR
Spectrophotometry of the lens, cornea, and humors for 195 species from 49 families found that the spectral composition of the light transmitted to the retina was most often limited by the lens (73% of species examined), and these species could possess true UV-color vision and hue discrimination.
Adaptive molecular evolution in the opsin genes of rapidly speciating cichlid species.
TLDR
This study examines the evidence for differential adaptive molecular evolution in East African cichlid opsin genes due to gross differences in environmental light conditions and identifies a number of promising candidate-tuning sites for future study by site-directed mutagenesis.
High sensitivity to short wavelengths in a lizard and implications for understanding the evolution of visual systems in lizards
TLDR
It is demonstrated that an increase in the number of UVS photoreceptors significantly enhances a lizard's ability to discriminate conspecific male throat colours and visual systems in diurnal lizards appear to be broadly conserved, but data from additional clades are needed to confirm this.
Optimal mechanisms for finding and selecting mates: how threespine stickleback (Gasterosteus aculeatus) should encode male throat colors
TLDR
It is shown that a simple opponent mechanism receiving equally weighted inputs from cones with peak absorptions at 445 nm and 605 nm efficiently encodes variation in male throat colors, and that threespine stickleback throats/photopigments are optimized for this coding scheme.
A third, ultraviolet-sensitive, visual pigment in the Tokay gecko (Gekko gekko)
  • E. Loew
  • Medicine, Chemistry
    Vision Research
  • 1 June 1994
TLDR
A microspectrophotometric re-examination of the Tokay gecko was undertaken to look specifically for a UV visual pigment, and a UV-absorbing pigment (364 nm lambda max) was found in approx.
Visual sensitivities tuned by heterochronic shifts in opsin gene expression
TLDR
Differences in visual sensitivities among species of Lake Malawi cichlids arise through heterochronic shifts relative to the ontogenetic pattern of the tilapia outgroup through altering developmental expression patterns, a powerful mechanism for change in morphological evolution.
Visual pigments and oil droplets in diurnal lizards: a comparative study of Caribbean anoles.
TLDR
Findings suggest that anoline visual pigments, as far as they determine visual system spectral sensitivity, are not necessarily adapted to the photic environment or to the color of significant visual targets (e.g. dewlaps).
Visual pigment molecular evolution in the Trinidadian pike cichlid (Crenicichla frenata): a less colorful world for neotropical cichlids?
TLDR
The results represent the first molecular evolutionary study of visual pigments in a Neotropical cichlid and thus provide a foundation for further study of a morphologically and ecologically diverse clade that has been understudied with respect to the link between visual ecology and diversification.
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