Two species of feminizing microsporidian parasite coexist in populations of Gammarus duebeni

Joseph E. Ironside, J. E. Smith, M. J. Hatcher, R. G. Sharpe, D. Rollinson, A. M. Dunn

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58 Citations (SciVal)

Abstract

The amphipod crustacean Gammarus duebeni hosts two species of vertically transmitted microsporidian parasites, Nosema granulosis and Microsporidium sp. A. Here it is demonstrated that these co-occurring parasite species both cause infected females to produce female-biased broods. A survey of European G. duebeni populations demonstrates that these two parasites co-occur in six of 10 populations. These findings contrast with the theoretical prediction that two vertically transmitted feminizing parasites should not coexist in a panmictic population of susceptible hosts at equilibrium. Possible explanations for the co-occurrence of the two feminizing microsporidia in G. duebeni include the recent invasion of a new parasite, horizontal transmission of one or both parasites and the spread of alleles for resistance to the dominant parasite in host populations.
Original languageEnglish
Pages (from-to)467-473
Number of pages7
JournalJournal of Evolutionary Biology
Early online date17 Apr 2003
DOIs
Publication statusPublished - May 2003

Keywords

  • coexistence
  • feminization
  • Gammarus duebeni
  • microsporidia
  • transmission

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