Occurrence of Sciadicleithrum mexicanurn Kritsky, Vidal-Martinez et Rodriguez-Canul, 1994 (Monogenea: Dactylogyridae) in the Cichlid Cichlasorna urophthalrnus from a Flooded Quarry in Yucatan, Mexico

Cichlids, Cichlasoma urophthalmus, collected in a flooded quarry in the Yucatan Peninsula, Mexico, from January through June 1992, had high levels of infection with the ancyrocephaline Sciadicleithrum mexicanum (Monogenea: Dactylogyridae) in all monthly samples. Neither occurrence nor maturation of...

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Bibliographic Details
Published in:Memórias do Instituto Oswaldo Cruz 1995-12, Vol.90 (3)
Main Authors: EF Mendoza-Franco, V Vidal-Martinez, R Sima-Alvarez, R Rodriguez-Canul, C Vivas-Rodriguez, T Scholz
Format: Article
Language:English
Subjects:
Monogenea - occurrence - maturation - Ancyrocephalinae - cichlid fishes - Mexico
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Summary:Cichlids, Cichlasoma urophthalmus, collected in a flooded quarry in the Yucatan Peninsula, Mexico, from January through June 1992, had high levels of infection with the ancyrocephaline Sciadicleithrum mexicanum (Monogenea: Dactylogyridae) in all monthly samples. Neither occurrence nor maturation of the worms exhibited any pronounced monthly fluctuation. The infection rate was found to be sizedependent, greater in longer risk The worms occurred on primary lamellae of gill filaments of all arches, with lower numbers of parasites attached to the fourth gill arch. Otherwise, there was no significant site preference of worms. Only nanor histopathological changes were found at the sites of attachment, and these were restricted to the epithelial cells of the primry lamellae of the gill filaments. The lack of seasonal periodicity in lhis tropical monogenean is compared to seasonal cycles typical of temperate species.
ISSN:1678-8060