Parasitology Research

, Volume 111, Issue 5, pp 1923–1928 | Cite as

Seasonal occurrence of Cosmocerca podicipinus (Nematoda: Cosmocercidae) in Pseudopaludicola boliviana (Anura: Leiuperidae) from natural environments in Corrientes Province, Argentina and aspects of its population structure

  • Cynthya Elizabeth GonzálezEmail author
  • Monika Inés Hamann
Original Paper


This study examines the seasonal changes in a population of cosmocercid nematode parasites in a natural environment in an amphibian host of the Neotropical realm. A total of 232 individuals (83 females, 105 males, and 44 larvae) of Cosmocerca podicipinus were collected from 105 Pseudopaludicola boliviana from Corrientes, Argentina, between December 2002 and December 2003. The prevalence of infection was high during all the seasons (>80.0 %); the mean intensity decreased from summer to winter and then increased in spring. The sex ratios of C. podicipinus were significantly different (P < 0.05) from the expected 1.00:1.00 ratio in winter and in the entire study period. There were no significant differences in the mean length of female and male nematodes between seasons (P > 0.05). All adult nematodes collected (both males and females) were mature. The pattern of distribution of nematodes was aggregated in the entire study and in summer, autumn, and spring. The body size of the host was not related to the intensity of infection (P > 0.05). The seasonal occurrence of C. podicipinus in P. boliviana did not show a marked seasonality.


Nematode Parasite Bromeliad Temporary Pond Seasonal Occurrence Female Frog 
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Copyright information

© Springer-Verlag 2012

Authors and Affiliations

  • Cynthya Elizabeth González
    • 1
    Email author
  • Monika Inés Hamann
    • 1
  1. 1.Centro de Ecología Aplicada del Litoral (CECOAL)Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)CorrientesArgentina

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