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Direct measurements on the orientation of the reflecting surfaces in the tapetum of Squalus acanthias, and some observations on the tapetum of Acipenser sturio

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

Direct observations on the reflecting layers in the tapetum of the spur dog Squalus acanthias confirm the orientations of the tapetal reflecting cells which were previously found histologically (Denton & Nicol, 1964). Surface views of the tapetum show the outlines of the exposed surface of the tapetal plates as ‘polygons’. The long axes of these polygons are parallel with the plane of the tissue on which they lie and the polygons are only inclined to this plane across their short axes. The angle to which they are inclined increases as we move towards the periphery of the eye.

Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 45 , Issue 3 , October 1965 , pp. 739 - 742
Copyright
Copyright © Marine Biological Association of the United Kingdom 1965

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References

Denton, E. J. & Nicol, J. A. C., 1964. The chorioidal tapeta of some cartilaginous fishes (Chondrichthyes). J. mar. biol. Ass. U.K.,, Vol. 44, pp. 219–58.CrossRefGoogle Scholar
Denton, E. J. & Nicol, J. A. C., 1965 a. Studies on reflexion of light from silvery surfaces of fishes, with special reference to the bleak, Alburnus alburnus. J. mar. biol. Ass. U.K., Vol. 45, pp. 683–703.Google Scholar
Denton, E. J. & Nicol, J. A. C., 1965 b. Reflexion of light by external surfaces of the herring, Clupea harengus. J. mar. biol. Ass. U.K., Vol. 45, pp. 711–38.Google Scholar
Nicol, J. A. C., 1965. Migration of chorioidal tapetal pigment in the spur dog Squalus acanthias. J. mar. biol. Ass. U.K., Vol. 45, pp. 405–27.Google Scholar