Eurytrema coelomaticum: influence of the infection on the reproduction and nucleic acids contents in the albumen gland and ovotestis of Bradybaena similaris

Jairo Pinheiro Suzana B. Amato About the authors

Abstract

The number of eggs laid per snail in Bradybaena similaris and the nucleic acids (DNA and RNA) in the albumen gland and ovotestis were quantified in snails infected with sporocysts of the digenetic trematode Eurytrema coelomaticum. The total number of eggs laid per mollusc was reduced by 96.32% at the end of the larval development. The DNA concentration increased by 700% and the RNA concentration was reduced by 8,38% by the time when the daughter sporocysts of E. coelomaticum were released from B. similaris. The relation between these values and the inhibition of the reproduction observed in infected molluscs is discussed.

Eurytrema coelomaticum; Bradybaena similaris; parasitic castration; nucleic acid; ovotestis; albumen gland


ABSTRACT

Eurytrema coelomaticum: influence of the infection on the reproduction and nucleic acids contents in the albumen gland and ovotestis of Bradybaena similaris

Jairo Pinheiro1

Suzana B. Amato2

Universidade Federal Rural do Rio de Janeiro, Departamento de Ciências Fisiológicas, Seropédica, Brasil

Universidade Federal Rural do Rio de Janeiro, Departamento de Biologia Animal, Seropédica, Brasil

The number of eggs laid per snail in Bradybaena similaris and the nucleic acids (DNA and RNA) in the albumen gland and ovotestis were quantified in snails infected with sporocysts of the digenetic trematode Eurytrema coelomaticum. The total number of eggs laid per mollusc was reduced by 96.32% at the end of the larval development. The DNA concentration increased by 700% and the RNA concentration was reduced by 8,38% by the time when the daughter sporocysts of E. coelomaticum were released from B. similaris. The relation between these values and the inhibition of the reproduction observed in infected molluscs is discussed.

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Publication Dates

  • Publication in this collection
    01 June 2009
  • Date of issue
    Oct 1995
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