Bibliothèque Électronique Lac Saint-Pierre

Natural occurrence of Diplostomums (Digenea : Diplostomatidae) in adult mudpuppies and bullfrog tadpoles from the St. Lawrence River, Quebec

Marcogliese, D. J. et Rodrigue, J. et Ouellet, M. et Champoux, L. (2000). Natural occurrence of Diplostomums (Digenea : Diplostomatidae) in adult mudpuppies and bullfrog tadpoles from the St. Lawrence River, Quebec. Comparative Parasitology , 67 (1). p. 26-31.

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Résumé

Adult mudpuppies (Necturus maculosus) and bullfrog tadpoles (Rana catesbeiana) infected with the eyefluke Diplostomum s in the lenses were collected from the St. Lawrence River, Quebec, Canada. Respective prevalence and mean abundance of Diplostomum sp. were 100 % and 3.1 ± 1.7 in Lake St. Francois, 58.3 % and 1.5 ± 1.8 in Lake St. Louis, and 53.8 % and 0.7 ± 0.8 in Lake St. Pierre. No eyeflukes were observed in mudpuppies from the Richelieu River. Prevalence and mean abundance of Diplostomum sp. were significantly higher in mudpuppies from Lake St. Francois than in those from other sites. The high prevalence and abundance in Lake St. Francois may be because the regulated water levels may enhance snail intermediate host habitats. There was a significant negative correlation between mudpuppy length and number of eyeflukes per host when samples were pooled from the 3 sites where Diplostomum sp. was found. Mean length of infected mudpuppies from those 3 sites was significantly smaller than uninfected ones. Twenty-four (28 %) of 86 mudpuppies had cataracts associated with infections of eyeflukes. Prevalence and mean abundance of Diplostomum sp. in bullfrog tadpoles collected from Lake St. Pierre were 14.3 % and 0.1 ± 0.4 parasite per animal, much lower than observed for mudpuppies from the same lake. Higher occurrence of eyeflukes in mudpuppies compared with tadpoles is attributed to the greater age and more sedentary benthic nature of mudpuppies. This is the first report of amphibians naturally infected with Diplostomum sp. and only the second with eyeflukes in general.

Type de document: Article scientifique
Statut du texte intégral: Autre
Mots-clés libres: Diplostomum, Eyefluke, Necturus maculosus, Mudpuppy, Rana catesbeiana, Tad pole, Amphibians, Prevalence, Abundance, St. Lawrence river
Sujets: 4. Faune > 4.3. Amphibien
Date de dépôt: 16 août 2016 14:28
Dernière modification: 16 août 2016 14:28
URI: http://belsp.uqtr.ca/id/eprint/398

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