ArticleJournal of comparative physiology. A, Neuroethology, sensory, neural, and behavioral physiology2005
Seasonal variation of chromophore composition in the eye of the Japanese dace, Tribolodon hakonensis.
Article in Journal of comparative physiology. A, Neuroethology, sensory, neural, and behavioral physiology, 2005. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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4 citing papers in PubMed, 18 citations in OpenAlex.
- Diverse Cell Types, Circuits, and Mechanisms for Color Vision in the Vertebrate Retina.Physiological reviews · 2019Review
- The effect of two endogenous retinoids on the mRNA expression profile in human primary keratinocytes, focusing on genes causing autosomal recessive congenital ichthyosis.Archives of dermatological research · 2014Article
- Spectral sensitivity of juvenile chub mackerel (Scomber japonicus) in visible and ultraviolet light.Fish physiology and biochemistry · 2010Article
- Seasonal cycle in vitamin A1/A2-based visual pigment composition during the life history of coho salmon (Oncorhynchus kisutch).Journal of comparative physiology. A, Neuroethology, sensory, neural, and behavioral physiology · 2006Article
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Authors and funding
6 authors at 3 institutions in 1 country.
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Abstract
The relationship between seasonal variation and the effect of several different environmental factors on chromophore composition was investigated in the eye of the Japanese dace, Tribolodon hakonensis which lives either in rivers or in the sea. Eyes obtained from river and sea populations had both retinal (A1) and 3,4-didehydroretinal (A2) all through the year but the ratio of these chromophores showed seasonal variation the relative amount of A2 was higher in winter and lower in summer. Besides seasonal variation, A2 showed marked differences depending on habitat: the highest proportion of A2 was 67% in January and the lowest 13% in July, in the river population, whereas in the sea population the highest and the lowest values were only 30 and 6%, respectively, during the same months. The seasonal variation in gonadosomatic index showed no correlation to variations in A2 proportion, and the maximum difference in water temperature between summer and winter was ca. 15 degrees C for both habitats. Because spectral conditions at the locations of capture of both river and sea populations were similar, we conclude that Japanese dace eyes are affected by exogenous factors related to differences between freshwater and seawater environments.
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