English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Background  The composition of parasite communities in two cyprinid species in southern France – native and threatened  Parachondrostoma toxostoma  and introduced  Chondrostoma nasus  – was investigated. In sympatry, these two species form two hybrid zones in the Durance and Ardeche Rivers. Due to their different feeding preference and habitat positions in allopatry, we supposed a difference in parasite communities between fish species. We expected more similar parasite communities in sympatric zones associated with habitat overlap (facilitating the transmission of ectoparasites) and similar feeding (more generalist behaviour when compared to allopatry, facilitating the transmission of endoparasites) in both fish species. Finally, we investigated whether  P. toxostoma  x  C. nasus  hybrids are less parasitized then parental species.    Methods  One allopatric population of each fish species plus two sympatric zones were sampled. Fish were identified using cytochrome  b  gene and 41 microsatellites loci and examined for all metazoan parasites.    Results  A high Monogenea abundance was found in both allopatric and sympatric populations of  C. nasus . Trematoda was the dominant group in parasite communities of  P. toxostoma  from the allopatric population. In contrast, the populations of  P. toxostoma  in sympatric zones were parasitized by  Dactylogyrus  species found in  C. nasus  populations, but their abundance in endemic species was low. Consequently, the similarity based on parasite presence/absence between the sympatric populations of  P. toxostoma  and  C. nasus  was high. Sympatric populations of  P. toxostoma  were more similar than allopatric and sympatric populations of this species. No difference in ectoparasite infection was found between  P. toxostoma  and hybrids, whilst  C. nasus  was more parasitized by Monogenea.    Conclusions  The differences in endoparasites between  P. toxostoma  and  C. nasus  in allopatry are probably linked to different feeding or habitat conditions, but host-parasite evolutionary associations also play an important role in determining the presence of  Chondrostoma -specific monogeneans. Our findings suggest that  Dactylogyrus  expanded with the source host  C. nasus  into introduced areas and that  P. toxostoma  became infected after contact with  C. nasus . Although the genotype of  P. toxostoma  and recombinant genotypes of hybrids are susceptible to  Dactylogyrus  transmitted from  C. nasus , the intensity of infection is low in these genotypes.

Does invasive Chondrostoma nasus shift the parasite community structure of endemic Parachondrostoma toxostoma in sympatric zones?