Hostname: page-component-cd9895bd7-mkpzs Total loading time: 0 Render date: 2024-12-25T02:18:14.435Z Has data issue: false hasContentIssue false
  • English
  • Français

The ecsoma in Hemiuridae (Digenea: Hemiuroidea): tegumental structure and function in the mesocercaria and the metacercaria of Lecithochirium furcolabiatum (Jones, 1933) Dawes, 1947

Published online by Cambridge University Press:  05 June 2009

B. F. Matthews  and
R. A. Matthews
B. F. Matthews
Affiliation:
Department of Biological Sciences, Plymouth Polytechnic, Drake Circus, Plymouth, Devon PL4 8AA, UK
R. A. Matthews
Affiliation:
Department of Biological Sciences, Plymouth Polytechnic, Drake Circus, Plymouth, Devon PL4 8AA, UK
Get access Rights & Permissions [Opens in a new window]

Abstract

Ultrastructural, histochemical and autoradiographical techniques have been used to investigate the development and function of the tegument of both somal and ecsomal body regions in the hemiurid Lecithochirum furcolabiatum. The terms mesocercaria and metacercaria are here adopted for those stages in the copepod second and fish third intermediate hosts respectively on the basis of morphology and on analogy with the Strigeidae. Mesocercariae were obtained by experimental infection of the harpacticoid copepod Tigriopus brevicornis with the cystophorous cercariae (syn. Cercaria vaullegeardi), whilst metacercariae were removed from the body cavities of naturally-infected rockpool teleosts including Gobius paganellus and Blennius pholis. Observations on the mesocercaria show the origin of the ecsoma from the distal half of the excretory vesicle, which at 21 days post-infection is capable of eversion through the terminal pore. The nucleated microrugous surface layer of the ecsoma at this stage is modified or replaced in the metacercaria by anucleate syncytial tegument similar to that of the adult organ. The metacercarial stage is also associated with the more advanced development of the somal tegument. The two stages differ in metabolic activity, the somal tegument of only the metacercaria resembling that of the adult in acid phosphatase distribution. In the mesocercaria the ecsomal tegument showed the strongest uptake of 3H-tyrosine; absorption of the latter was not detected in the metacercaria. 3H-glucose uptake was restricted to the intestinal caeca of both stages.

Keywords

Lecithochirium furcolabiatumHemiuridaeecsomategumentultrastructuremesocercariaemetacercariae
Type
Research Papers
Information
Journal of Helminthology , Volume 62 , Issue 4 , December 1988 , pp. 317 - 330
Copyright
Copyright © Cambridge University Press 1988

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Bosma, N. J. (1934) The life history of the trematode Alaria mustelae, sp. nov. Transactions of the American Microscopical Society, 53, 116–153.CrossRefGoogle Scholar
Cardell, R. R. (1962) Observations on the ultrastructure of the body of the cercaria of Himasthla quissetensis (Miller and Northup, 1926). Transactions of the American Microscopical Society, 81, 124–131.CrossRefGoogle Scholar
Ching, H. L. (1960) Studies on three hemiuroid cercariae from Friday Harbor, Washington. Journal of Parasitology, 46, 663–670.CrossRefGoogle ScholarPubMed
Dunn, T. S., Nizami, W. A. & Hanna, R. E. B. (1985) Studies on the ultrastructure and histochemistry of the lymph system in three species of amphistome (Trematoda: Digenea) Gigantocotyle explanatum, Gastrothylax crumenifer and Srivastavaia indica from the Indian water buffalo Bubalus bubalis. Journal of Helminthology, 59, 1–18.CrossRefGoogle ScholarPubMed
Erasmus, D. A. (1972) The Biology of Trematodes. Edward Arnold: London.Google Scholar
Gibson, D. I. (1974) Aspects of the ultrastructure of the daughter sporocyst and cercaria of Pdocotyle staffordi Miller, 1941 (Digenea: Opecoelidae). Norwegian Journal of Zoology, 22, 237–252.Google Scholar
Gibson, D. I. & Bray, R. A. (1986) The Hemiuridae (Digenea) of fishes from the north-east Atlantic. Bulletin of the British Museum (Natural History): Zoology series, 51, 1–125.Google Scholar
Gibson, D. I., Rollinson, D. & Matthews, B. F. (1985) The potential use of enzyme studies for elucidating aspects of the systematics and life history of marine digeneans. Proceedings of the XII symposium of the Scandinavian Society for Parasitology, Tromso, Norway 17–19.6, 8–9.Google Scholar
Køie, M. (1979) On the morphology and life history of Derogenes varicus (Muller, 1784) Looss, 1901 (Trematoda, Hemiuridae). Zeitschrift für Parasitenkunde, 59, 67–78.Google Scholar
Krupa, P. L., Cousineau, G. H. & Bal, A. K. (1969) Electron microscopy of the excretory vesicle of a trematode cercaria. Journal of Parasitology, 55, 985–992.CrossRefGoogle Scholar
Leong, C. H. D. & Howell, M. J. (1971) Formation and structure of the cyst wall of Stictodora lari (Trematoda: Heterophyidae). Zeitschrift für Parasitenkunde, 35, 340–350.CrossRefGoogle Scholar
Matthews, B. F. (1981a) Cercaria vaullegeardi Pelseneer, 1906 (Digenea: Hemiurdae); the infection mechanism. Parasitology, 83, 587–593.CrossRefGoogle Scholar
Matthews, B. F. (1981b) Cercaria vaullegeardi Pelseneer, 1906 (Digenea: Hemiuridae): development and ultrastructure. Parasitology, 83, 575–586.CrossRefGoogle Scholar
Matthews, B. F. (1982) The Biology of British Marine Hemiuridae. PhD Thesis, Plymouth Polytechnic.Google Scholar
Matthews, B. F. & Matthews, R. A. (1988) The tegument in Hemiuridae (Digenea: Hemiuroidea): structure and function in the adult. Journal of Helminthology. 62, 305–316.CrossRefGoogle Scholar
Meuleman, E. A. & Holzmann, P. J. (1975) The development of the primitive epithelium and true tegument in the cercaria of Schistosoma mansoni. Zeitschrift für Parasitenkunde, 45, 307–318.CrossRefGoogle ScholarPubMed
Pearson, J. C. (1956) Studies on the life cycle and morphology of the larval stages of Alaria arisaemoides Augustine and Uribe, 1927 and Alaria canis LaRue and Fallis, 1936 (Trematoda: Strigeidae). Canadian Journal of Zoology, 34, 295–387.CrossRefGoogle Scholar
Stunkard, H. W. (1980) The morphology, life-history and systematic relations of Tubulovesicula pinguis (Linton, 1940) Manter, 1947 (Trematoda: Hemiuridae). Biological Bulletin, 159, 737–751.CrossRefGoogle Scholar
Thomas, L. J. (1939) Life cycle of a fluke, Halipegus eccentricus n. sp., found in the ears of frogs. Journal of Parasitology, 25, 206–221.CrossRefGoogle Scholar
Threadgold, L. T. & Arme, C. (1974) Electron microscope studies of Fasciola hepatica. XI. Autophagy and parenchymal cell function. Experimental Parasitology, 35, 389–405.CrossRefGoogle ScholarPubMed