Abstract
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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References cited
Bullock, A.M. 1982. The pathological effects of ultraviolet radiation on the epidermis of teleost fish with reference to the solar radiation effect in higher animals. Proc. Roy. Soc. Edinburgh 81B: 199–210.
Bullock, A.M. 1988. Solar ultraviolet radiation: a potential environmental hazard in the cultivation of farmed finfish. pp. 139–224. In: J.F. Muir & R.J. Roberts (ed.) Recent Advances in Aquaculture III, Croom Helm, London.
Bullock, A.M. & R.R. Coutts. 1985. The impact of solar ultraviolet radiation upon the skin of rainbow trout, Salmo gairdneri Richardson, farmed at high altitude in Bolivia. J. Fish Diseases 8: 263–272.
Calkins, J. (ed.) 1982. The role of solar ultraviolet radiation in marine ecosystems. Plenum Press, New York. 724 pp.
Carreto, J.I., M.O. Carignan, G. Daleo & S.G. DeMarco. 1990. Occurrence of mycosporine-like amino acids in the red-tide dinoflagellate Alexandrium excavatum: UV-photoprotective compounds? J. Plankton Res. 12: 909–921.
Cockell, C.S. & J. Knowland. 1999. Ultraviolet radiation screening compounds. Biol. Rev. 74: 311–345.
Douglas, R.H. & C.W. Hawryshyn. 1990. Behavioural studies of fish vision: an analysis of visual capabilities. pp. 373–418. In: R.H. Douglas & M.B.A. Djamgoz (ed.) The Visual System of Fish, Chapman and Hall, London.
Douglas, R.H. & N.J. Marshall. 1999. A review of vertebrate and invertebrate ocular filters. pp. 95–162. In: S.N. Archer, M.B.A. Djamgoz, E.R. Loew, J.C. Partridge & S. Vallerga (ed.) Adaptive Mechanisms in the Ecology of Vision, Kluwer Academic Publishers, Dordrecht.
Dunlap, W.C. & J.M. Shick. 1998. Ultraviolet radiation-absorbing mycosporine-like amino acids in coral reef organisms: a biochemical and environmental perspective. J. Phycology 34: 418–430.
Dunlap, W.C., D.M. Williams, B.E. Chalker & A.T. Banaszak. 1989. Biochemical photoadaptation in vision: U.V.-absorbing pigments in fish eye tissues. Comp. Biochem. Physiol. B 93: 601–607.
Fabacher, D.L. & E.E. Little. 1995. Skin component may protect fishes from ultraviolet-B radiation. Env. Sci. Poll. Res. Int. 2: 30–32.
Häder, D.-P., H.D. Kumar, R.C. Smith & R.C. Worrest. 1998. Effects on aquatic ecosystems. J. Photochem. Photobiol. B 46: 53–68.
Holm-Hansen, O., D. Lubin & E.W. Helbling. 1993. Ultraviolet radiation and its effects on organisms in aquatic environments. pp. 379–425. In: A.R. Young, J. Moan, L.O. Bjorn & W. Nultsch (ed.) Environmental UV Photobiology, Plenum Press, New York.
Losey, G.S., T.W. Cronin, T.H. Goldsmith, D. Hyde, N.J. Marshall & W.N. McFarland. 1999. The UV visual world of fishes: a review. J. Fish Biol. 54: 921–943.
Losey, G.S., P.A. Nelson & J.P. Zamzow. 2000. Ontogeny of spectral transmission in the eye of the tropical damselfish, Dascyllus albisella (Pomacentridae), and possible effects on UV vision. Env. Biol. Fish. 59: 21–28.
Lythgoe, J.N., W.R.A. Muntz, J.C. Partridge, J. Shand & D.M. Williams. 1994. The ecology of the visual pigments of snappers (Lutjanidae) on the Great Barrier Reef. J. Comp. Physiol. A 174: 461–467.
Marshall, J. 2000a. The visual ecology of reef fish colours. pp. 59–96. In:Y. Espmark, T. Amundsen & G. Rosenqvist (ed.) Signalling and signal design in animal communication, Tapir Academic Press, Trondheim.
Marshall, N.J. 2000b. Communication and camouflage with the same ‘bright’ colours in reef fish. Phil. Trans. Royal Soc. 355: 1243–1248
Mason, D.S., F. Schafer, J.M. Shick & W.C. Dunlap. 1998. Ultraviolet radiation-absorbing mycosporine-like amino acids (MAAS) are acquired from their diet by medaka fish (Oryzias latipes) but not by SKH-1 hairless mice. Comp. Biochem. Physiol. A 120: 587–598.
McFarland, W.N. & E.R. Loew. 1994. Ultraviolet visual pigments in marine fishes of the family Pomacentridae. Vision Research 34: 1393–1396.
Plack, P.A., N.W. Fraser, P.T. Grant, C. Middleton, A.I. Mitchell & R.H. Thomson. 1981. Gadusol, an enolic derivative of cyclohexane-1,3-dione present in the roes of cod and other marine fish. Biochem. J. 199: 741–747.
Sasaki, M., S. Takeshita, M. Sugiura, N. Sudo, Y. Miyake, Y. Furusawa & T. Sakata. 1993. Ground-based observation of biologically active solar ultraviolet-B irradiance at 35°N latitude in Japan. J. Geomag. Geoelec. 45: 473–485.
Shephard, K.L. 1994. Functions for fish mucus. Reviews in Fish Biology and Fisheries 4: 401–429.
Siebeck, U.E. & N.J. Marshall. 2001. Ocular media transmission of coral reef fish-can coral reef fish see ultraviolet light? Vision Research 41: 133–149.
Smith, R.C., B.B. Prezelin, K.S. Baker, R.R. Bidigare, N.P. Boucher, T. Coley, D. Karentz, S. MacIntyre, H.A. Matlick, D. Menzies, M. Ondrusek, Z. Wan & K.J. Waters. 1992. Ozone depletion: ultraviolet radiation and phytoplankton biology in Antarctic waters. Science 255: 952–959.
Stolarski, R., R. Bojkov, L. Bishop, C. Zerefos, J. Staehelin & J. Zawodny. 1992. Measured trends in stratospheric ozone. Science 256: 342–349.
Videler, H., G.J. Geertjes & J.J. Videler. 1999. Biochemical characteristics and antibiotic properties of the mucous envelope of the queen parrotfish. J. Fish Biol. 54: 1124–1127.
Vorobyev, M. & D. Osorio. 1998. Receptor noise as a determinant of colour thresholds. Proc. R. Soc. Lond. B 265: 351–358.
Winckler, K. & L. Fidhiany. 1996. Significant influence of UVA on the general metabolism in the growing cichlid fish, Cichlasoma nigrofasciatum. J. Photochem. Photobiol. B 33: 131–135.
Winn, H.E. & J.E. Bardach. 1956. Differential food selection by moray eels and a possible role of the mucous envelope of parrot fishes in reduction of predation. Ecology 40: 296.
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Zamzow, J.P., Losey, G.S. Ultraviolet Radiation Absorbance by Coral Reef Fish Mucus: photo-protection and Visual Communication. Environmental Biology of Fishes 63, 41–47 (2002). https://doi.org/10.1023/A:1013846816869
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DOI: https://doi.org/10.1023/A:1013846816869