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Movement patterns and photosensitivity of Trichonema spp. infective larvae in non-directional light

Published online by Cambridge University Press:  06 April 2009

N. A. Croll
N. A. Croll
Affiliation:
Department of Zoology and Applied Entomology, Imperial College, London University
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Extract

1. Trichonema spp. infective larvae once stimulated move in darkness, dim and bright visible light and ultra-violet light. There was no significant difference between the distances moved in these photic conditions.

2. Movement patterns were variable but certain shapes of tracks, rates of reversal and reversing types were typical of certain light conditions.

3. The rate of reversing was dependent on light conditions and was random in direction.

4. Sensory adaptation was suggested in visible light, but not in ultra-violet at 366 μm.

5. Movement analyses in flashing light suggested that pulsating stimuli at intervals of 100 ms or less were required for sensory input approximating to physiologically continuous stimulation.

6. Larvae showed an idiosyncrasy in their tracks, repeated tracking with the same individual giving less varied tracks than with different larvae.

The author is indebted to Mr J. M. Smith for his painstaking efforts in preparing the tracks and his willing and skilful assistance throughout.

Type
Research Article
Information
Parasitology , Volume 62 , Issue 3 , June 1971 , pp. 467 - 478
Copyright
Copyright © Cambridge University Press 1971

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References

REFERENCES

Buckley, J. J. C. (1940). Observations on the vertical migration of infective larvae of certain bursate nematodes. Journal of Helminthology 18, 173–82.CrossRefGoogle Scholar
Crofton, H. D. (1954). The vertical migration of infective larvae of strongyloid nematodes. Journal of Helminthology 28, 35–52.CrossRefGoogle ScholarPubMed
Croll, N. A. (1965). The klinokinetic behaviour of infective Trichonema larvae in light. Parasitology 55, 579–82.CrossRefGoogle Scholar
Croll, N. A. (1966 a). Activity and the orthokinetic response of Trichonema larvae in light. Parasitology 56, 307–12.CrossRefGoogle Scholar
Croll, N. A. (1966 b). The phototactic response and spectral sensitivity of Chromadorina viridis (Nematoda, Chromadorida) with a note on the nature of the paired pigment spots. Nematologica 12, 610–14.CrossRefGoogle Scholar
Croll, N. A. (1967). The mechanism of orientation in nematodes. Nematologica 13, 17–22.CrossRefGoogle Scholar
Croll, N. A. (1969). Asymmetry in nematode movement patterns and its possible significance in orientation. Nematologica 15, 389–94.CrossRefGoogle Scholar
Croll, N. A. (1970 a). The sensory basis of activation in nematodes. Experimental Parasitology 27, 10–16.CrossRefGoogle ScholarPubMed
Croll, N. A. (1970 b). The Behaviour of Nematodes. London: Edward Arnold.Google ScholarPubMed
Croll, N. A. & Smith, J. M. (1970). The sensitivity and response of Rhabditis sp. to peripheral mechanical stimulation. Proceedings of the Helminthological Society of Washington 37, 1–5.Google Scholar
Hawking, F. (1964). The periodicity of microfilariae VII. Further observations Wuchereria bancrofti. Transactions of the Royal Society of Tropical Medicine and Hygiene 58, 212–27.CrossRefGoogle Scholar
Keeling, J. E. D. (1960). The effects of ultraviolet radiation on Nippostrongylus muria. I. Irradiation of infective larvae: lethal and sublethal effects. Annals of tropical Medicine and Parasitology 54, 182–91.CrossRefGoogle Scholar
Odei, M. A. (1969). Locomotory reponses of Trichonema (Nematoda) larvae. Ph.D. thesis, London University.Google Scholar
Sandstedt, R., Sullivan, T. & Schuster, M. L. (1961). Nematode tracks in the study of movement of Meloidogyne incognita incognita. Nematologica 6, 261–5.Google Scholar