Ultraviolet radiation absorbance by coral reef fish mucus: photo-protection and visual communication

Tropical reef fishes are exposed to high levels of damaging ultraviolet radiation. Here we report the widespread distribution of both UVA- and UVB-absorbing compounds in the epithelial mucus of these fishes. Mucus from 137 reef fish species was examined by spectrophotometry and 90% were found to hav...

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Veröffentlicht in:Environmental biology of fishes 2002, Vol.63 (1), p.41-47
Hauptverfasser: ZAMZOW, Jill P, LOSEY, George S
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description Tropical reef fishes are exposed to high levels of damaging ultraviolet radiation. Here we report the widespread distribution of both UVA- and UVB-absorbing compounds in the epithelial mucus of these fishes. Mucus from 137 reef fish species was examined by spectrophotometry and 90% were found to have strong absorbance peaks between 290 and 400 nm. Most fish species (78%) had more than one peak, that suggests a broad-band ultraviolet screening function for their mucus. Thalassoma duperrey, a tropical wrasse, was able to alter the absorbance of its epithelial mucus in response to both naturally and experimentally manipulated UV regimes. Visual modeling suggests that a fish with UV vision, such as Dascyllus albisella, could detect the changes in mucus spectra of T. duperrey that occurred in these experiments.
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subjects Animal and plant ecology
Animal, plant and microbial ecology
Animals
Autoecology
Biological and medical sciences
Coral reefs
Dascyllus albisella
Fundamental and applied biological sciences. Psychology
Marine
Pisces
Protozoa. Invertebrata
Sea water ecosystems
Spectrophotometry
Synecology
Thalassoma duperrey
Ultraviolet radiation
title Ultraviolet radiation absorbance by coral reef fish mucus: photo-protection and visual communication
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