1992
DOI: 10.1111/j.1558-5646.1992.tb01984.x
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Hybrid Zones and Host-Parasite Relationships: Effect on the Evolution of Parasitic Specificity

Abstract: In southern France, Diplozoon gracile (Monogenea, Polyopisthocotylea), parasitizes four sympatric cyprinids. One of these host species, Barbus meridionalis, naturally hybridizes with another species of barbel, Barbus barbus, which is never parasitized by D. gracile under natural conditions. This hybridization has previously been studied and described as an introgression of B. barbus by B. meridionalis. The hybrids are parasitized by D. gracile, and parasite prevalence increases in proportion to the introgressi… Show more

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Cited by 51 publications
(50 citation statements)
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“…Our infection experiment revealed nevertheless that the overinfection of D. galeata (detected in the field) is not likely to be confounded by other traits than genetic variation for resistance. In a cyprinid hybrid system, in contrast, the observed differences in infection level were caused by habitat variation between the two hybridizing taxa (Le Brun et al 1992). We confirmed earlier reports that C. mesnili imposes high fitness costs on its host, in particular that infected daphnids have very low fecundity Lass & Bittner 2002;Wolinska et al 2004).…”
Section: (C) Infection Experimentssupporting
confidence: 79%
See 1 more Smart Citation
“…Our infection experiment revealed nevertheless that the overinfection of D. galeata (detected in the field) is not likely to be confounded by other traits than genetic variation for resistance. In a cyprinid hybrid system, in contrast, the observed differences in infection level were caused by habitat variation between the two hybridizing taxa (Le Brun et al 1992). We confirmed earlier reports that C. mesnili imposes high fitness costs on its host, in particular that infected daphnids have very low fecundity Lass & Bittner 2002;Wolinska et al 2004).…”
Section: (C) Infection Experimentssupporting
confidence: 79%
“…Particularly, in hybridizing systems, differences in infection level between parental taxa and hybrids are thought to be stable (see review by Moulia 1999). In many of these systems, however, the barrier for parasite adaptation to a new host might be spatial separation between the two hybridizing taxa, either geographical (Heaney & Timm 1985;Sage et al 1986) or, on a finer scale, by different habitat types within a hybrid zone (Le Brun et al 1992). In sympatric hybrid systems, parasites have the potential to access both parentals as well as their hybrids and we may, therefore, expect a dynamic coevolution.…”
Section: Introductionmentioning
confidence: 99%
“…When hosts frequent these areas a school of L. aeneus can swim through a swarm of oncomiracidia and become infected (Wiles 1970). Le Brun et al (1990, 1992 suggested that the variable occurrence of Diplozoon gracile (Reichenbach-Klinke, 1961) was related to the behaviour and habitat of the host. Oncomiracidia of the parasite were more likely to be located near the bottom of a water body and fish found in this area were more likely to become infected (Le Brun et al 1990, 1992.…”
Section: Discussionmentioning
confidence: 99%
“…Le stade infestant du parasite se tiendrait dans des habitats fréquentés seulement par le barbeau méridional (zones sombres et calmes). A l'appui de cette hypothèse, il faut signaler qu'un autre cyprin, le goujon, Gobio gobio, dont l'écologie est très proche de celle du barbeau méridional (selon LE BRUN et al, 1992) est également infesté par ce Monogène.…”
Section: Parasitologieunclassified
“…Les résultats des analyses parasitologiques aboutissent au même type de résultats. LE BRUN et al (1992) montrent que si la présence du parasite Diplozoon gracile est fonction du taux d'introgression de l'hôte, ce n'est pas pour des raisons physiologiques mais probablement par un processus indirect : le taux d'introgression doit influer sur le comportement, qui lui même doit influer sur les possibilités de rencontre hôte-parasite.…”
Section: Classification Du Modèle Barbeauunclassified