Abstract
The principal mechanism in the sea-finding orientation of hatchling turtles when they move from the nest to the water is based on a photo-tropotactic reaction to light and a complex balancing of stimulation to different retinal areas and corresponding regions of the optic tectum. Transient potentiation of parts of this system occur following abrupt changes in illumination. In contrast to guidance systems that demand fine resolution of stimuli, sea-finding depends on integration of information, integration both over space (wide field of view) and over time (averaging illumination over about 1 s), Sea-finding of turtles when on land is relevant to their movements when in the water since there may be some calibration of other guidance systems against headings initiated by the sea-finding mechanisms.
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References
Bacon, P.R.: The orientation circles in the beach ascent crawl of the leatherback turtle, Dermochelys coriacea, in Trinidad. Herpetologica, 29, 343–348 (1973)
Balazs, G.H.: Green turtle migrations in the Hawaiian Archipelago. Biol. Conserv. 9, 125–140 (1976)
Carr, A.: Adaptive aspects of the scheduled travel of Chelonia, In: Animal Orientation and Navigation. Storm, R.M, (ed), Oregon State university Press, Corvallis, 1967, pp. 35–55
Carr, A., Ogren, L.: The ecology and migrations of sea turtles. IV, The green turtle in the Caribbean Sea. Am. Mus, Nat. Hist. Bull. 121, 1–48 (1960)
Daniel, R.S., Smith, K.U.: The sea-approach of the neonate loggerhead turtle (Caretta caretta). J. Comp, physiol. Psychol. 40 413–420 (1947)
Ehrenfeld, D.W.: The role of vision in the sea-finding orientation of the green turtle (Chelonia mydas). II. Orientation mechanism and range of spectral sensitivity. Anim. Behav. 16, 281–287 (1968)
Ehrenfeld, D.W., Koch, A.L.: Visual accommodation in the green sea turtle. Science 155, 827–828 (1967)
Fraenkel, G.S., Gunn, D.L.: The Orientation of Animals, New York: Dover Press, 1961
Frick, J.: Orientation and behaviour of hatchling green turtles (Chelonia mydas) in the sea. Anim. Behav. 24, 849–857 (1976)
Koch, A.L., Carr, A., Ehrenfeld, D.W.: The problem of open-sea navigation: the migration of the green turtle to Ascension Island. J. Theoret. Biol. 22, 163–179 (1969)
Mrosovsky, N.: The water-finding ability of sea turtles: behavioral studies and physiological speculations. Brain Behav. Evol. 5, 202–225 (1972a)
Mrosovsky, N.: Spectrographs of the sounds of leatherback turtles. Herpetologica, 28, 256–258 (1972b)
Mrosovsky, N.: Individual differences in the sea-finding mechanism of hatchling leatherback turtles. Brain, Behav. Evol. 14, 261–273 (1977)
Mrosovsky, N.: The effects of flashing lights on sea-finding behavior of green turtles. Behav. Biol. 22, 85–91 (1978)
Mrosovsky, N., Shettleworth, S.J.: Wavelength preferences and brightness cues in the water finding behaviour of sea turtles. Behaviour 32, 211–257 (1968)
Mrosovsky, N., Shettleworth, S.J.: Further studies of the seafinding mechanism in green turtle hatchlings. Behaviour, 51, 195–208 (1974)
Mrosovsky, N., Shettleworth, S.J.: On the orientation circle of the leatherback turtle, Dermochelys coriacea. Anim. Behav. 23, 568–591 (1975)
Pritchard, P.C.H.: Post-nesting movements of marine turtles (Cheloniidae and Dermochelyidae) tagged in the Guianas. Copeia, No. 4, 749–754 (1976)
Schapiro, H., Goodman, D.C.: Motor functions and their anatomical basis in the forebrain and tectum of the alligator. Exp. Neurol, 24, 187–195 (1969)
Verheijen, F.J., Wildschut, J.T.: The photic orientation of hatchling sea turtles during water finding behaviour. Neth. J. Sea Res. 7, 53–67 (1973)
Walls, G.L.: The vertebrate eye and its adaptive radiation. Cranbrook Inst. Sci., Bloomfield Hills (1942)
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© 1978 Springer-Verlag Berlin Heidelberg
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Mrosovsky, N. (1978). Orientation Mechanisms of Marine Turtles. In: Schmidt-Koenig, K., Keeton, W.T. (eds) Animal Migration, Navigation, and Homing. Proceedings in Life Sciences. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-11147-5_41
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DOI: https://doi.org/10.1007/978-3-662-11147-5_41
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