Summary
The cercaria of Cryptocotyle lingua responds to the onset of mechanical vibrations and to a decrease in light intensity by an increase in activity. The cercaria shows a decline in activity with age and an increase in activity with increasing temperature. Stimulation by host extract also initiates an increase in activity and penetration behaviour. A similar series of responses were found with amines of chain length C7–C9.
Evidence is presented that the activity rhythm, intrinsic to the tail, may be modified by a pacemaker in the body of the cercaria. This pacemaker may be influenced by a variety of exogenous and endogenous stimuli.
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Abbreviations
- a.s.:
-
adjustable stand
- b.:
-
baseboard
- c.:
-
camera
- h.f.:
-
heat filter
- i.d.:
-
iris diaphragm
- l.:
-
lens
- l.h.:
-
lamp holder
- l.s.:
-
light source
- m.:
-
mirror
- m.c.:
-
magnetic clamp
- o.b.:
-
optical bench
- r.:
-
rubber
- s.v.:
-
specimen vessel
- w.b.:
-
work base
References
Chance, M. R. A., Mansour, T. E.: A kymographic study of the action of drugs on the liver fluke (Fasciola hepatica). Brit. J. Pharmacol. 4, 7–13 (1949)
Chapman, H. D., Wilson, R. A.: The distribution and fine structure of the integumentary papillae of the cercariae of Himasthla secunda (Nicoll). Parasitology 61, 219–227 (1970)
Chapman, H. D., Wilson, R. A.: The propulsion of the cercaria of Himasthla secunda (Nicoll) and Cryptocotyle lingua. Parasitology 67, 1–15 (1973)
Dönges, J.: Reizphysiologische Untersuchungen an der Cercarie von Posthodiplostomum cuticola (v. Nordmann, 1832) Dubois 1936, dem Erreger des Diplostomatiden-Melanoms der Fische. Verh. dtsch. zool. Ges. 18, 216–223 (1963)
Dönges, J.: Der Lebenszyklus von Posthodiplostomum cuticola (v. Nordmann, 1832) Dubois 1936 (Trematoda, Diplostomatidae). Z. Parasitenk. 24, 169–248 (1964)
Dyer, W. J.: Amines in fish muscle. VI. Trimethylamine oxide content of fish and marine invertebrates. J. Fish. Res. Bd. Can. 8, 314–324 (1952)
Haas, W.: Reizphysiologische Untersuchungen an Cercarien von Diplostomum spathaceum. Z. vergl. Physiol. 64, 254–287 (1969)
Mansour, T. E.: The effect of lysergic acid diethylamide, 5-hydroxytryptamine, and related compounds on the liver fluke, Fasciola hepatica. Brit. J. Pharmacol. 12, 406–409 (1957)
Miller, H. M.: Variety of behaviour of larval trematodes. Science (N. Y.) 68, 117–118 (1928)
Miller, H. M., Mahaffey, E. E.: Reactions of Cercaria hamata to light and to mechanical stimuli. Biol. Bull. mar. biol. Lab., Woods Hole 59, 95–103 (1930)
Roeder, K. D.: Nerve cells and insect behaviour. Cambridge, Mass.: Harvard University Press 1963
Shewan, J. M.: The chemistry and metabolism of nitrogenous extractives in fish. Biochem. Soc. Symp. 6, 28–48 (1951)
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Chapman, H.D. The behaviour of the cercaria of Cryptocotyle lingua . Z. F. Parasitenkunde 44, 211–226 (1974). https://doi.org/10.1007/BF00328763
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DOI: https://doi.org/10.1007/BF00328763