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Scientific article
English

Cryptic speciation among intestinal parasites (Trematoda: Digenea) infecting sympatric host fishes (Sparidae)

Published inJournal of evolutionary biology, vol. 13, no. 5, p. 778-785
Publication date2000-09-01
First online date2000-09-01
Abstract

In the north-western (NW) Mediterranean, the teleosts Diplodus sargus, D. vulgaris and D. annularis coexist in infralittoral habitats. These fishes are infected by two species of the Digenea (Platyhelminthes, Trematoda): Macvicaria crassigula (Opecoelidae) and Monorchis parvus (Monorchiidae) for which we obtained Internal Transcribed Spacer rDNA sequences. Each parasite species represents a complex of two cryptic species, one restricted to D. annularis, and the other shared by D. sargus and D. vulgaris. Cytochrome b mtDNA sequences were used to infer host phylogenetic relationships which showed that the distribution of parasites in Diplodus hosts is not a consequence of coevolutionary interactions. We used diet analyses available for the fish hosts to assess the degree of overlap in the use of food among the three species. The feeding overlap was significant only between D. sargus and D. vulgaris, but not for the other fish pairs. The possible mechanisms involved in the speciation of the digenean fauna of Diplodus fishes are discussed.

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Keywords
  • Cryptic diversity
  • Diplodus
  • Hosts feeding preferences
  • Macvicaria
  • Mitochondrial and ribosomal DNA
  • Monorchis
  • Speciation
Citation (ISO format)
JOUSSON, Olivier, BARTOLI, Pierre, PAWLOWSKI, Jan Wojciech. Cryptic speciation among intestinal parasites (Trematoda: Digenea) infecting sympatric host fishes (Sparidae). In: Journal of evolutionary biology, 2000, vol. 13, n° 5, p. 778–785. doi: 10.1046/j.1420-9101.2000.00221.x
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ISSN of the journal1010-061X
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