Parasitology Research

, Volume 101, Issue 5, pp 1265–1276

Effects of small weirs on fish parasite communities

  • Geraldine Loot
  • Yorick Reyjol
  • Nicolas Poulet
  • Andrea Simkova
  • Simon Blanchet
  • Sovan Lek
Original Paper

DOI: 10.1007/s00436-007-0632-6

Cite this article as:
Loot, G., Reyjol, Y., Poulet, N. et al. Parasitol Res (2007) 101: 1265. doi:10.1007/s00436-007-0632-6

Abstract

In this study, we examined the impacts of small weirs on the parasite community of gudgeon and toxostome in a medium-sized river. We tested changes on parasite species diversity using indices that capture both richness and abundance characteristics, and we examined parasite community structure with null models (co-occurrence index C score) and a multiple discriminant function analysis (MDFA). Our results showed that parasite community diversity of gudgeon is strongly influenced by weirs with a maximum diversity upstream of the weirs. Weirs also induce change in abundance of gudgeon parasite species particularly during summer. Nevertheless, we obtained that weirs had no effect on the parasite co-occurrence patterns. In addition, similarity indices indicate that the parasite faunas of newly established limnophilic species (roach and bleak) are host-specific and are rarely transmitted to other fish species. We conclude that fish parasite communities responded in different ways to the presence of impassable weirs, but, in a general tendency, changing environmental conditions induced by weirs may represent an ecological risk.

Copyright information

© Springer-Verlag 2007

Authors and Affiliations

  • Geraldine Loot
    • 1
  • Yorick Reyjol
    • 2
  • Nicolas Poulet
    • 3
  • Andrea Simkova
    • 4
  • Simon Blanchet
    • 1
  • Sovan Lek
    • 1
  1. 1.Laboratoire Evolution et Diversité Biologique, U.M.R. 5174CNRS–Université Paul SabatierToulouse Cedex 4France
  2. 2.Département de Chimie-BiologieUniversité du Québec à Trois-RivièresTrois-RivièresCanada
  3. 3.Conseil Supérieur de la PêchePoitiersFrance
  4. 4.Department of Botany and Zoology, Faculty of ScienceMasaryk UniversityBrnoCzech Republic