Rearing in different photic and spectral environments changes the optomotor response to chromatic stimuli in the cichlid fish <i>Aequidens pulcher</i>

Kröger, Ronald H. H.; Knoblauch, Bettina; Wagner, Hans‐Joachim

doi:10.1242/jeb.00337

Cited by 43 publications

(34 citation statements)

References 22 publications

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“…In contrast, studies on the blue acara, Aequiodens pulcher, reared under monochromatic blue light revealed a reduction in the frequency of the single cone class maximally sensitive to blue light (Kroger et al, 1999;Kroger et al, 2003;Wagner and Kroger, 2000;Wagner and Kroger, 2005). In adult black bream, the frequency ratios between 550 and 570·nm cone classes rose from 1:0.8 in the standard condition fish to 1:10.5 in the wild-caught fish.…”

Section: Effects Of Environmental Lightmentioning

confidence: 86%

The influence of ontogeny and light environment on the expression of visual pigment opsins in the retina of the black bream,Acanthopagrus butcheri

Shand

Davies²,

Thomas

et al. 2008

Journal of Experimental Biology

133

142

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SUMMARYThe correlation between ontogenetic changes in the spectral absorption characteristics of retinal photoreceptors and expression of visual pigment opsins was investigated in the black bream, Acanthopagrus butcheri. To establish whether the spectral qualities of environmental light affected the complement of visual pigments during ontogeny, comparisons were made between fishes reared in: (1) broad spectrum aquarium conditions; (2) short wavelength-reduced conditions similar to the natural environment; or (3) the natural environment (wild-caught). Microspectrophotometry was used to determine the wavelengths of spectral sensitivity of the photoreceptors at four developmental stages: larval, post-settlement, juvenile and adult. The molecular sequences of the rod (Rh1) and six cone (SWS1, SWS2A and B, Rh2Aα and β, and LWS) opsins were obtained and their expression levels in larval and adult stages examined using quantitative RT-PCR. The changes in spectral sensitivity of the cones were related to the differing levels of opsin expression during ontogeny. During the larval stage the predominantly expressed opsin classes were SWS1, SWS2B and Rh2Aα, contrasting with SWS2A, Rh2Aβ and LWS in the adult. An increased proportion of long wavelength-sensitive double cones was found in fishes reared in the short wavelength-reduced conditions and in wildcaught animals, indicating that the expression of cone opsin genes is also regulated by environmental light.

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Section: Effects Of Environmental Lightmentioning

confidence: 86%

The influence of ontogeny and light environment on the expression of visual pigment opsins in the retina of the black bream,Acanthopagrus butcheri

Shand

Davies²,

Thomas

et al. 2008

Journal of Experimental Biology

133

142

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“…While the response varied among species, these visual filters changed both spectrally and in their lengths. The cichlid fish, Aequidens pulcher, is the only other welldocumented example of an animal that adaptively responds to spectral changes in laboratory light treatments, expressing ontogenetic neural and behavioral changes in varying light conditions (Braun et al 1997;Kröger et al 1999;Kröger et al 2003). Further, whereas cichlids require at least 17-19 months to affect a change, these changes in stomatopods occur within approximately 12 weeks, indicating that facultative responses can occur extremely rapidly.…”

Section: Discussionmentioning

confidence: 99%

Evolutionary variation in the expression of phenotypically plastic color vision in Caribbean mantis shrimps, genus Neogonodactylus

2006

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SummaryMany animals have color vision systems that are well suited to their local environments. 2Changes in color vision can occur over long periods (evolutionary time), or over relatively short periods such as during development. A select few animals, including stomatopod crustaceans, are able to adjust their systems of color vision directly in response to varying environmental stimuli. Recently, it has been shown that juveniles of some stomatopod species that inhabit a range of depths can spectrally tune their color vision to local light conditions through spectral changes in filters contained in specialized photoreceptors. The present study quantifies the potential for spectral tuning in adults of three species of Caribbean Neogonodactylus stomatopods that differ in their depth ranges to assess how ecology and evolutionary history influence the expression of phenotypically plastic color vision in adult stomatopods. After 12 weeks in either a full-spectrum "white" or a narrow-spectrum "blue" light treatment, each of the three species evidenced distinctive tuning abilities with respect to the light environment that could be related to its natural depth range. A molecular phylogeny generated using mitochondrial cytochrome oxidase C subunit 1 (CO-1) was used to determine whether tuning abilities were phylogenetically or ecologically constrained. Although the sister taxa N. wennerae and N. bredini both exhibited spectral tuning, their ecology (i.e. preferred depth range) strongly influenced the expression of the phenotypically plastic color vision trait. Our results indicate that adult stomatopods have evolved the ability to undergo habitat-specific spectral tuning, allowing rapid facultative physiological modification to suit ecological constraints.3

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“…Wavelength ( be influenced by the spectral composition of the lighting under laboratory (Kröger et al, 1999;Kröger et al, 2003;Shand et al, 2008) and natural (McDonald and Hawryshyn, 1995;Fuller et al, 2004) conditions. Carleton (Carleton, 2009) has also reported differences in opsin gene expression between lab-reared and wildcaught cichlids.…”

Section: Spectral Sensitivity Curves and Violet Sensitivitymentioning

confidence: 99%

Electrophysiological assessment of spectral sensitivity in adult Nile tilapia Oreochromis niloticus: evidence for violet sensitivity

Lisney

Studd

Hawryshyn

2010

Journal of Experimental Biology

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SUMMARYThe cichlid fish radiations of the African Great Lakes are an important model for evolutionary biology. Cichlids have diverse colour vision systems and predominately express three cone visual pigments. However, rare populations of spectrally distinct cones have been found in a number of species, but it is not known whether they contribute to spectral sensitivity. Adult Nile tilapia, Oreochromis niloticus, an ancestral outgroup to the cichlid radiations in the Great Lakes, have three cone types: shortwavelength sensitive (SWS), medium-wavelength sensitive (MWS) and long-wavelength sensitive (LWS) cones, but evidence from microspectrophotometry and cone opsin gene expression suggests they may also have violet-sensitive (VS) cones. We used electrophysiology to assess spectral sensitivity in this species and found evidence of four sensitivity peaks in the ranges 380-420, 440-480, 500-600 and 600-680 nm, with maximal sensitivity at longer wavelengths. The continued presence of a 380-420 nm peak under long-wavelength chromatic adapting backgrounds indicates that this is due to a VS cone mechanism not the b-band of the LWS cone mechanism. Differences in spectral sensitivity curves recorded at different times of year revealed evidence of A1/A2 shifts. The presence of notches in the sensitivity curves and a multiple-mechanisms model used to assess cone contributions indicated that the curves are the result of four cone mechanisms (VS, SWS, MWS and LWS cones) and that chromatically opponent processes occur between mechanisms. The spectral transmittance of the lens steeply declines between 410-380 nm, limiting the short-wavelength limb of the VS cone. As adults, Nile tilapia appear to possess the necessary retinal mechanisms for colour vision. While maximal sensitivity to longer wavelengths is an adaptation to the wavelengths of light predominantly available in their natural habitats, their broad sensitivity range suggests that Nile tilapia possess a flexible, generalised visual system able to adapt to changes in visual environment in their highly variable natural habitat.

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Rearing in different photic and spectral environments changes the optomotor response to chromatic stimuli in the cichlid fish Aequidens pulcher

Cited by 43 publications

References 22 publications

The influence of ontogeny and light environment on the expression of visual pigment opsins in the retina of the black bream,Acanthopagrus butcheri

The influence of ontogeny and light environment on the expression of visual pigment opsins in the retina of the black bream,Acanthopagrus butcheri

Evolutionary variation in the expression of phenotypically plastic color vision in Caribbean mantis shrimps, genus Neogonodactylus

Electrophysiological assessment of spectral sensitivity in adult Nile tilapia Oreochromis niloticus: evidence for violet sensitivity

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