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1 results

  • On the infracommunity structure of adult cestodes in freshwater fishes

  • K. I. Andersen, E. T. Valtonen
  • Journal:
    Parasitology / Volume 101 / Issue 2 / October 1990
    Published online by Cambridge University Press:
    06 April 2009, pp. 257-264

  • The distribution–co-occurrence and exchange of adult cestode species in two fish communities (the Bothnian Bay and Lake Yli-Kitka both in Finland) was studied. Coexistence of two or more mature cestode species in the same fish host population was zero for all fish species studied (33) except pike in the Bothnian Bay and whitefish in the lake. It was found that 60% of the fish species studied in the Bothnian Bay and 80% of the fish species studied from Lake Yli-Kitka harboured only 1 mature cestode species. Exchange of adult cestode species between the different fish species in these two fish communities was found to be as rare as coexistence. The infra-community structure of adult cestodes in freshwater fish thus turned out to be markedly different from what is known to be the situation in birds. The evolutionary explanation behind the differences is discussed.