Effects of light and temperature on the emergence of Haplorchis pumilio cercariae from the snail host, Thiara tuberculata

• Autorzy: Umadevi K , Madhavi R
• Języki publikacji: EN

Abstrakty

EN

The cercaria of Haplorchis pumilio exhibited diurnal pattern in the emergence from the snail host, with peak between 10 am and 12 noon and limited emergence during night. Continuous light permitted emergence to continue rhythmically while continuous dark has suppressed the emergence. Inversion of photoperiod has resulted in immediate reversal of the emergence pattern. Variation is found in the numbers of cercariae released by different individuals of snails and by the single snail on different days, but consistency is maintained in the emergence pattern. Temperature of 30-35°C is found to be favourable for the cercarial emergence. The results of the study demonstrate that emergence pattern is influenced by both exogenous and endogenous factors.

Słowa kluczowe

EN

endogenous factor; emergence; taxonomic status; behavioural adaptation; host; parasite; physical factor; temperature; chemotactic response; life cycle; light; snail; exogenous factor; swimming phase; Haplorchis pumilio; cercaria; Thiara tuberculata

• Wydawca: -
• Czasopismo: Acta Parasitologica
• Rocznik: 1997
• Tom: 42
• Numer: 1
• Opis fizyczny: p.12-17,fig.

Twórcy

autor

Umadevi K

• Department of Zoology, Andhra University, Visakhapatnam-530 003, India

autor

Madhavi R

• Department of Zoology, Andhra University, Visakhapatnam-530 003, India

Bibliografia

• Asch H. L. 1972. Rhythmic emergence of Schistosoma mansoni cercariae from Biomphalaria glabrata: control by illumination. Experimental Parasitology, 31, 350-355.
• Combes C, Fournier A., Moné H., Théron A. 1994. Behaviours in trematode cercariae that enhance parasite transmission: patterns and processes. Parasitology, 109, S3-S13.
• Glaudel R. J., Etges F. J. 1973. The effect of photoperiod inversion upon Schistosoma mansoni cercarial emergence from Biomphalaria glabrata. International Journal for Parasitology, 3, 619-622.
• Lewis M. C., Welsford I. G., Uglem G. L. 1989. Cercarial emergence of Proterometra macrostoma and P. edneyi (Digenea: Azygiidae): contrasting responses to light:dark cycling. Parasitology, 99, 215-223.
• Lowenberger C. A., Rau M. E. 1994. Plagiorchis elegans: emergence, longevity and infectivity of cercariae, and host behavioural modifications during cercarial emergence. Parasitology, 109, 65-72.
• Luttermoser G. W. 1955. Studies on the chemotherapy of experimental schistosomiasis. III. Harvest of Schistosoma mansoni cercariae by forced nocturnal emergence from Australorbis glabratus. Journal of Parasitology, 41, 201-208.
• Mills J. N. 1966. Human circadian rhythms. Physiological Reviews, 46, 128-171.
• Mouchet F., Théron A., Brémond P., Sellin E., Sellin В. 1992. Pattern of cercarial emergence of Schistosoma curassoni from Niger and comparison with three sympatric species of schistosomes. Journal of Parasitology, 78, 61-63.
• Mouahid A., Théron A. 1986. Schistosoma bovis: Patterns of cercarial emergence from snails of the genera Bulinus and Planorbarius. Experimental Parasitology, 62, 389-393.
• Nojima H., Sato A. 1982. Schistosoma mansoni and Schistosoma haematobium: Emergence of schistosoma cercariae from snails with darkness and illumination. Experimental Parasitology, 53, 189-198.
• Olivier L. 1951. The influence of light on the emergence of Schistosomatium douthitti cercariae from their snail host. Journal of Parasitology, 37, 210-214.
• Pitchford R. J., Dutoit J. F. 1976. The shedding pattern of three little known African schistosomes under outdoor conditions. Annals of Tropical Medicine and Parasitology, 70, 181-187.
• Pitchford R. J., Meyling A. H., Meyling J., Dutoit J. F. 1969. Cercarial shedding patterns of various schistosoma species under outdoor conditions in the Transvaal. Annals of Tropical Medicine and Parasitology, 63, 359-371.
• Raymond K. M., Proben A. J. 1987. The effect of light and darkness on the production of cercaria of Schistosoma haematobium from Bulinus globosus. Journal of Helminthology, 6, 291-296.
• Shostak A. W., Esch G. W. 1990. Photocycle-dependent emergence by cercariae of Halipegus occidualis from Helisoma anceps, with special reference to cercarial emergence patterns as adaptations for transmission. Journal of Parasitology, 76, 790-795.
• Théron A. 1984. Early and late shedding patterns of Schistosoma mansoni cercariae: Ecological significance in transmission to human and murine hosts. Journal of Parasitology, 70, 652-655.
• Théron A., Combes С. 1988. Genetic analysis of cercarial emergence rhythms of Schistosoma mansoni. Behaviour Genetics, 18, 201-209.
• Wagenbach G. E., Alldredge A. L. 1974. Effect of light on the emergence pattern of Plagiorchis microcanthos cercariae from Stagnicola exilis. Journal of Parasitology, 60, 782-785.
• Webber R. A., Rau M. E., Lewis D. J. 1986. The effects of various light regimens on the emergence of Plagiorchis noblei cercariae from the molluscan intermediate host, Stagnicola elodes. Journal of Parasitology, 72, 703-705.