Degeneration of Melanophores in Fundulus

Odiorne, J. M.

doi:10.1073/pnas.19.3.329

Cited by 18 publications

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“…Several researchers observed an increase in melanophore density in fish adapted to a black background (Sumner, 1940). On a white background, the decrease in melanophore density was shown to appear in the form of degeneration (Graupner and Fischer, 1935;Odiorne, 1933). However, those studies did not clarify the processes of development or degradation of melanophores at the cellular level.…”

Section: Introductionmentioning

confidence: 99%

Morphological color changes in fish: Regulation of pigment cell density and morphology

Sugimoto

2002

Microscopy Res & Technique

233

215

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Pigment cells enable fish to change their coloration. It has been recognized that fish color changes can be divided into two categories; one is a physiological color change, which is attributed to rapid motile responses of chromatophores, and the other is a morphological color change, which results from changes in the morphology and density of chromatophores. Long-term adaptation of fish to a certain background can be a general cue to morphological color changes, and has been studied from the beginning of the 19th century. Although the motile mechanism and its control in fish chromatophores are now being elucidated, it is not yet clear how chromatophores change their density and what controls morphological color changes. In recent years, chromatophores, especially melanophores, have been shown to differentiate and to die by apoptosis under the influence of factors that regulate motile responses. Those factors are likely to utilize common intracellular signaling pathways used in part to regulate both types of color changes. In this article, after briefly reviewing the history of early studies, recent findings are discussed relevant to increases or decreases in chromatophores, and changes in their morphology. Finally, morphological color changes are discussed as physiological phenomena involved in the balance between differentiation and apoptosis of chromatophores.

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Section: Introductionmentioning

confidence: 99%

Morphological color changes in fish: Regulation of pigment cell density and morphology

Sugimoto

2002

Microscopy Res & Technique

233

215

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“…In the black background, α‐MSH is secreted from the pars intermedia of the pituitary and causes pigment dispersion in chromatophores. The decrease in melanophore density appeared as degeneration on a white background (Graupner & Fischer, 1935; Odiorne, 1933). The result indicates that long‐term exposure to different monochromatic light for 28 days induces significant changes in terms of the number and size of melanophores in the skin of C. punctata .…”

Section: Discussionmentioning

confidence: 99%

Effects of monochromatic lights on the melanophores arrangement in the spotted snakehead fish Channa punctata (Bloch, 1793)

Ali

Mishra

2023

Journal of Fish Biology

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Some freshwater teleost fish have pigment cells whose arrangement and shape are affected by the environment. Natural light has a wide range of light intensity. Fish are sensitive to the background and exposed light colour. Fish body colour is a significant criterion in fixing its market value, whether it is ornamental or edible. By favourable light exposure, a culturist may get a good market value of fish on most ethical grounds. In this study, we recorded the changes in melanophore response with the changes in light colour on Channa punctata. Adult fish were treated with monochromatic lights (darkness, white, blue and red light) for 5 and 28 days. After treatment, their body colour and melanophore size, number, length and the number of dendrites were studied. The results showed a significant influence of monochromatic light on melanophore arrangement in fish skin. The data showed that blue light is appropriate for the overall species colour of photic C. punctata. Continuous black or white light caused severe damage to the fish's appearance.

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A study of variations in the amount of yellow pigment (xanthophyll) in certain fishes, and of the possible effects upon this of colored backgrounds

Sumner

Fox

1933

J. Exp. Zool.

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Degeneration of Melanophores in Fundulus

Cited by 18 publications

References 0 publications

Morphological color changes in fish: Regulation of pigment cell density and morphology

Morphological color changes in fish: Regulation of pigment cell density and morphology

Effects of monochromatic lights on the melanophores arrangement in the spotted snakehead fish Channa punctata (Bloch, 1793)

A study of variations in the amount of yellow pigment (xanthophyll) in certain fishes, and of the possible effects upon this of colored backgrounds

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