Degeneration and regeneration of ultraviolet cone photoreceptors during development in rainbow trout

Allison, W. Ted; Dann, Stephen G.; Veldhoen, Kathy; Hawryshyn, Craig W.

doi:10.1002/cne.21164

Cited by 71 publications

(89 citation statements)

References 136 publications

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“…For instance, when trout lose UVS cones in the ventral retina, it abolishes polarization vision in that part of the retina [24][25][26], and when UVS cones regenerate, polarization vision returns [26]. Therefore, polarization vision functionality depends critically on the presence of UVS cones in the cone mosaic in a particular area of the retina.…”

Section: Structure -Function Relation In Polarization Visionmentioning

confidence: 99%

Teleost polarization vision: how it might work and what it might be good for

Kamermans

Hawryshyn

2011

Phil. Trans. R. Soc. B

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In this review, we will discuss the recent literature on fish polarization vision and we will present a model on how the retina processes polarization signals. The model is based on a general retinalprocessing scheme and will be compared with the available electrophysiological data on polarization processing in the retina. The results of this model will help illustrate the functional significance of polarization vision for both feeding behaviour and navigation. First, we examine the linkage between structure and function in polarization vision in general.

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Section: Structure -Function Relation In Polarization Visionmentioning

confidence: 99%

Teleost polarization vision: how it might work and what it might be good for

Kamermans

Hawryshyn

2011

Phil. Trans. R. Soc. B

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“…A spectral confound would have the effect of showing either the horizontal detector mechanism dominating the polarization sensitivity or polarization sensitivity disappearing because the spectral signal becomes the salient feature. (2) Test fish that have been shown to have UVS cone loss from the central and ventral retina through programmed cell death Allison et al, 2006), show polarization sensitivity with only the horizontal detector mechanism present (Hawryshyn, 2000). (3) Recordings from neurons in the torus semicicularis (mid brain structure) show similar characteristics of polarization sensitivity to retinal neurons (Coughlin and Hawryshyn, 1995).…”

Section: Do Spectral Confounds Interfere With Polarization Sensitivity?mentioning

confidence: 99%

Retinal processing and opponent mechanisms mediating ultraviolet polarization sensitivity in rainbow trout (Oncorhynchus mykiss)

Ramsden

Anderson

Mussi

et al. 2008

Journal of Experimental Biology

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SUMMARYA number of teleost fishes have photoreceptor mechanisms to detect linearly polarized light. We studied the neuronal mechanism underlying this ability. It was found that a polarized signal could be detected in rainbow trout (Oncorhynchus mykiss) both in the electroretinogram (ERG) and in the compound action potential (CAP) measured in the optic nerve, indicating a strong retinal contribution to the processing of polarized light. The CAP recordings showed a W-shaped sensitivity curve, with a peak at 0°, 90°a nd 180°, consistent with processes for both vertical and horizontal orientation. By contrast, the ERG recordings reveal a more complex pattern. In addition to the peaks at 0°, 90° and 180°, two additional peaks appeared at 45° and 135°. This result suggests a specialized contribution of the outer retina in the processing of polarized light. The spectral sensitivity of the mechanisms responsible for these intermediate peaks was studied using chromatic adaptation. Here we show that long wavelength-sensitive (LWS) cone mechanism adaptation shifted the intermediate peaks towards 90°, whereas ultraviolet-sensitive (UVS) cone mechanism adaptation shifted the peaks away from 90° towards either 0° or 180°. These results provide further confirmation that the 90° peak is dominated by the LWS cone mechanism and the 0° and 180° peaks are dominated by the UVS cone mechanism. In addition, a pharmacological approach was used to examine the retinal neural mechanisms underlying polarization sensitivity. The effect of blocking negative feedback from horizontal cells to cones on the ERG was studied by making intraocular injections of low doses of cobalt, known to block this feedback pathway. It was found that the intermediate peaks seen in the ERG polarization sensitivity curves were eliminated after application of cobalt, suggesting that these peaks are due to outer retinal inhibition derived from feedback of horizontal cells onto cones. A simple computational model was developed to evaluate these results. The model consists of opponent and non-opponent processing elements for the two polarization detectors. This model provides a first approximation analysis suggesting that opponent processing occurs in the outer retina for polarization vision. Although it seems that polarization vision uses a slightly more complicated coding scheme than colour vision, the results presented in this paper suggest that opponent and non-opponent channels process polarization information.

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“…These alterations in spectral sensitivity were sometimes associated with a loss of certain cone classes and changes in the spatial arrangement of photoreceptors throughout the retina, i.e. cone photoreceptor mosaic (Allison et al, 2010;Allison et al, 2003;Allison et al, 2006;Shand et al, 1999).…”

Section: Introductionmentioning

confidence: 99%

Ontogeny in the visual system of Nile tilapia

Sabbah

Hui

Hauser

et al. 2012

Journal of Experimental Biology

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SUMMARYRetinal neurogenesis in fish facilitates cellular rearrangement throughout ontogeny, potentially allowing for optimization of the visual system to shifts in habitat and behaviour. To test this possibility, we studied the developmental trajectory of the photopic visual process in the Nile tilapia. We examined ontogenetic changes in lens transmission, photoreceptor sensitivity and postreceptoral sensitivity, and used these to estimate changes in cone pigment frequency and retinal circuitry. We observed an ontogenetic decrease in ultraviolet (UV) photoreceptor sensitivity, which resulted from a reduction in the SWS1 cone pigment frequency, and was associated with a reduction in lens transmission at UV wavelengths. Additionally, post-receptoral sensitivity to both UV and long wavelengths decreased with age, probably reflecting changes in photoreceptor sensitivity and retinal circuitry. This novel remodelling of retinal circuitry occurred following maturation of the visual system but prior to reaching adulthood, and thus may facilitate optimization of the visual system to the changing sensory demands. Interestingly, the changes in post-receptoral sensitivity to long wavelengths could not be predicted by the changes observed in lens transmission, cone pigment frequency or photoreceptor sensitivity. This finding emphasizes the importance of considering knowledge of visual sensitivity and retinal processing when studying visual adaptations and attempting to relate visual function to the natural environment. This study advances our understanding of ontogeny in visual systems and demonstrates that the association between different elements of the visual process can be explored effectively by examining visual function throughout ontogeny.

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Degeneration and regeneration of ultraviolet cone photoreceptors during development in rainbow trout

Cited by 71 publications

References 136 publications

Teleost polarization vision: how it might work and what it might be good for

Teleost polarization vision: how it might work and what it might be good for

Retinal processing and opponent mechanisms mediating ultraviolet polarization sensitivity in rainbow trout (Oncorhynchus mykiss)

Ontogeny in the visual system of Nile tilapia

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