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Studies on reflexion of light from silvery surfaces of fishes, with special reference to the bleak, Alburnus alburnus

Published online by Cambridge University Press:  11 May 2009

E. J. Denton  and
J. A. C. Nicol
E. J. Denton
Affiliation:
The Plymouth Laboratory
J. A. C. Nicol
Affiliation:
The Plymouth Laboratory
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Extract

The problem of how a fish can make itself invisible in the natural light-conditions in an aquatic environment is discussed with particular reference to the silvery surfaces of fish.

In fish which we have examined, the silvery surfaces are of two types: (1) an argenteum which consists of long thin crystals of guanine whose reflecting surfaces are approximately parallel with the surface of the fish; (2) layers of guanine crystals lying either on the inner surfaces of the scales or in the subdermis—these crystals are not, in general, orientated with their reflecting surfaces parallel with the surfaces of the fish, and are much broader than those of the argenteum.

Methods are described by which the orientation of the crystal planes with respect to the planes of the scales on which they lie can be determined.

The orientation of the crystals of type 2 in different parts of the body is described for the horse mackerel, Trachurus trachurus (L.), and for the bleak, Alburnus alburnus (L.).

For the bleak it is shown that although the planes of the crystals are often very much inclined with respect to the planes of the scales, the long axes of the crystals are always approximately parallel with the planes of scales. The inclination of the crystals, therefore, is away from the scales across their short axes.

Measurements of the light transmitted by silvery scales of the bleak show that they reflect light strongly when this falls obliquely on the crystals which they contain and that they are most transparent to light which strikes the scales in a direction perpendicular to the reflecting planes of the crystals.

Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 45 , Issue 3 , October 1965 , pp. 683 - 703
Copyright
Copyright © Marine Biological Association of the United Kingdom 1965

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References

Clarke, W. D., 1963. Function of bioluminescence in mesopelagic organisms. Nature, Land., Vol. 198, pp. 1244–6.CrossRefGoogle Scholar
Cott, H. B., 1940. Adaptive Coloration in Animals. 508 pp. London: Methuen.Google Scholar
Denton, E. J. & Nicol, J. A. C., 1962. Why fishes have silvery sides and a method of measuring reflectivity. J. Physiol., Vol. 165, 13–15 p.Google Scholar
Denton, E. J. & Nicol, J. A. C., 1964 a. The choroidal tapeta of some elasmobranch fishes (Chondrichthyes). J. mar. biol. Ass. U.K., Vol. 44, pp. 219–58.CrossRefGoogle Scholar
Denton, E. J. & Nicol, J. A. C., 1964 b. On the orientationof reflecting crystals in the surfaces of fishes. J.Physiol., Vol. 172, pp. 53–4 P.Google Scholar
Denton, E. J. & Nicol, J. A. C., 1965. Reflexion of light by external surfaces of the herring, Clupea harengus. J. mar. biol. Ass. U.K., Vol. 45, pp. 711–738.CrossRefGoogle Scholar
Denton, E. J. & Walker, M. A., 1958. The visual pigment of the conger eel. Proc. R. Soc., B, Vol. 148, pp. 257–69.Google ScholarPubMed
Franz, V., 1907. Die biologische Bedeutung des Silberglanzes in der Fischhaut. Biol. Zbl, Bd. 27, pp. 278–85.Google Scholar
Fraser, J., 1962. Nature Adrift: the Story of Marine Plankton. 178 pp. London: G. T. Foulis and Co., Ltd.Google Scholar
Jerlov, N. G. & Fukuda, M., 1960. Radiance distribution in the upper layers of the sea. Tellus, Vol. 12, pp. 348–55.CrossRefGoogle Scholar
Millott, J., 1923. Le pigment purique chez les vertébrés inférieurs. Bull. biol. Fr. Belg., T. 57, pp. 261–363.Google Scholar
Murray, J. & Hjort, J., 1912. The Depths of the Ocean. 821 pp. London: Macmillan.Google Scholar
Nakata, A. & Matuzawa, J., 1955. Observations on crystal guanine and its occurrence in marine fish. J. Shimonoseki Coll. Fish., Vol. 5, pp. 113–15. [In Japanese, with English summary.]Google Scholar
Neckel, I., 1954. Chemische und elektxonen-mikroskopische Untersuchungen über das Guanin in der Haut einiger Fische. Mikroskopie, Bd. 9, pp. 113–19.Google Scholar
Phillips, F. C., 1960. The Use of Stereographic Projection in Structural Geology. 86 pp. London: Edward Arnold.Google Scholar
Popoff, M., 1906. Fischfärbung und Selektion. Biol. Zbl., Bd. 26, pp. 272–82.Google Scholar
Tyler, J. E., 1960. Radiance distribution as a function of depth in an underwater environment. Bull. Scripps Instn biol. Res., Vol. 7, pp. 363–412.Google Scholar
Walls, G. L., 1942. The vertebrate eye and its adaptive radiation. 785 pp. Sci. Bull. Cranbrook Inst., Mich., no. 19.Google Scholar
Ward, F., 1919. Animal Life Under Water. 178 pp. London: Cassell.Google Scholar