In fish retina, four kinds of photoreceptor cells (or cones) are two-dimensionally arranged in a very regular manner, forming cone mosaics. Mosaic pattern differs between species--two typical patterns are "row mosaic" and "square mosaic", exemplified by the cone mosaics in zebrafish and in medaka, r
Cone visual pigments and retinal mosaics in the striped marlin
โ Scribed by K. A. Fritsches; L. Litherland; N. Thomas; J. Shand
- Publisher
- John Wiley and Sons
- Year
- 2003
- Tongue
- English
- Weight
- 185 KB
- Volume
- 63
- Category
- Article
- ISSN
- 0022-1112
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โฆ Synopsis
Three different cone photoreceptor visual pigments in the retina of striped marlin Tetrapturus audax were found with the aid of microspectrophotometry. This provides the first evidence for the basis of colour vision in the Istiophoridae. Furthermore, regional variations in photoreceptor density, type and spatial arrangement indicate differing visual capabilities along different visual axes.
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We investigated circadian ocular rhythms in the Japanese quail, Coturnix coturnix japonica. The birds were placed under light-dark cycles (LD 12:12), constant light (LL) and constant darkness (DD), and the retinas were dissected out at four-hour intervals throughout 24 h. Following measurements were
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