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Memórias do Instituto Oswaldo Cruz
Fundação Oswaldo Cruz, Fiocruz
ISSN: 1678-8060
EISSN: 1678-8060
Vol. 93, No. 4, 1998, pp. 477-478
Bioline Code: oc98092
Full paper language: English
Document type: Research Article
Document available free of charge

Memórias do Instituto Oswaldo Cruz, Vol. 93, No. 4, 1998, pp. 477-478

 en RESEARCH NOTE - Distribution patterns of Microcotyle nemadactylus (Monogenea) on gill filaments of Cheilodactylus variegatus (Teleostei)
Marcelo E Oliva & Jose L Luque

Abstract

Preference by restricted habitat in the gills of fishes is a well-known
phenomenon among ectoparasites, especially copepods and monogenea. Factors 
that could explain this preference are not yet clear. An approach to the 
solution of this problem has been proposed by J Paling, who showed that the
spatial distribution of glochidia is determined by the differential action
of water flow through gill arch. A similar conclusion was reached by J Davey.
When microhabitat preference is studied in species with similar ecological
requirements, ecological instead of mechanical phenomenon are apparent. The
presence of a single species of Monogenea in the gill filaments of the
teleost Cheilodactylus variegatus Valenciennes, 1833 allows us to
test the hypothesis of habitat restriction caused by ecological processes.

Keywords
monogenea - marine fishes - ecology - habitat segregation

 
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