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          Institute: MPI für Evolutionsbiologie     Collection: Ecophysiology     Display Documents



  history
ID: 229816.0, MPI für Evolutionsbiologie / Ecophysiology
Seasonal variability in the gut ultrastructure of the parasitic copepod Neoergasilus japonicus (Copepoda, Poecilostomatoida)
Authors:Baud, A.; Cuoc, C.; Grey, J.; Chappaz, R.; Alekseev, V.
Language:English
Date of Publication (YYYY-MM-DD):2004-10
Title of Journal:Canadian Journal of Zoology
Journal Abbrev.:Can. J. Zool.
Volume:82
Issue / Number:10
Start Page:1655
End Page:1666
Review Status:not specified
Audience:Not Specified
Abstract / Description:The gut structure and ultrastructure of Neoergasilus japonicus (Harada, 1930), a copepod from the family Ergasilidae (Copepoda, Poecilostomatoida) and a parasite of fish, were compared at different periods of the life cycle: in free-living specimens in October and after attaching to fish in January and June. Differences in the depth of the intestinal epithelium were prominent and other cellular characteristics appeared seasonally variable. We relate these to changes in the physiological activity. Preliminary data from stable-isotope analyses of attached specimens suggest nutritional contribution from parasitism. The possibility of a diapause in the life cycle, as well as the relationship between the morphology of the gut and early evolutionary parasitism of N. japonicus, are discussed.
External Publication Status:published
Document Type:Article
Affiliations:MPI für Limnologie/Abt. Ökophysiologie
External Affiliations:Univ Aix Marseille 1, Equipe Rech Biodivers & Environm, Case 18,3 Pl Victor Hugo, Marseille, F-13331 France; Univ Aix Marseille 1, Equipe Acceuil Evolut Genome & Environm, Marseille, F-13331 France; Russian Acad Sci, Inst Zool, St Petersburg, 199034 Russia
Identifiers:ISSN:0008-4301 [ID-No:1]
DOI:10.1139/Z04-149 [ID-No:2]
LOCALID:2361/S 38376 [Listen-Nummer/S-Nummer]
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