Intraspecific variation in Gyrodactylus mediotorus and G. crysoleucas (Gyrodactylidae) from Nearctic shiners (Leuciscidae): evidence for ongoing speciation, host-switching, and parasite translocation

RAHMOUNI, Chahrazed, Mária SEIFERTOVÁ, Megan G. BEAN and Andrea VETEŠNÍKOVÁ ŠIMKOVÁ. Intraspecific variation in Gyrodactylus mediotorus and G. crysoleucas (Gyrodactylidae) from Nearctic shiners (Leuciscidae): evidence for ongoing speciation, host-switching, and parasite translocation. Parasite. EDP Sciences, 2024, vol. 31, June 2024, p. 1-14. ISSN 1252-607X. Available from: https://dx.doi.org/10.1051/parasite/2024023.

Basic information

• Original name: Intraspecific variation in Gyrodactylus mediotorus and G. crysoleucas (Gyrodactylidae) from Nearctic shiners (Leuciscidae): evidence for ongoing speciation, host-switching, and parasite translocation
• Authors: RAHMOUNI, Chahrazed (12 Algeria, guarantor, belonging to the institution), Mária SEIFERTOVÁ (703 Slovakia, belonging to the institution), Megan G. BEAN and Andrea VETEŠNÍKOVÁ ŠIMKOVÁ (203 Czech Republic, belonging to the institution).
• Edition: Parasite, EDP Sciences, 2024, 1252-607X.

Other information

• Original language: English
• Type of outcome: Article in a journal
• Field of Study: 10613 Zoology
• Country of publisher: France
• Confidentiality degree: is not subject to a state or trade secret
• WWW: URL
• Impact factor: Impact factor: 2.900 in 2022
• Organization unit: Faculty of Science
• Doi: http://dx.doi.org/10.1051/parasite/2024023
• UT WoS: 001244447700001
• Keywords in English: Monogenea; Gyrodactylus; Leuciscidae; North America; Haptor; Nuclear genes
• Tags: rivok
• Tags: International impact, Reviewed

Abstract

A parasitological investigation of Cyprinella venusta and Notropis cf. stramineus sampled in Texas, USA, in the Guadalupe River, revealed the presence of Gyrodactylus crysoleucas Mizelle and Kritsky, 1967 on C. venusta, and Gyrodactylus mediotorus King, Marcogliese, Forest, McLaughlin & Bentzen, 2013 on both fish species. This represents new leuscicid fish hosts and locality records for these two gyrodactylids. Gyrodactylus crysoleucas previously identified from both non-native Californian Notemigonus crysoleucas and from farmed stocks in Minnesota demonstrated intraspecific variability in terms of morphology and genetics as a local adaptation associated with isolation by distance. Results further confirmed G. crysoleucas as alien in the western USA and suggested host-switching involving C. venusta and N. crysoleucas. Conservative morphology and genetics on the part of G. mediotorus from C. venusta and N. cf. stramineus (Guadalupe River) was observed, while higher genetic divergence in the ITS sequences associated with morphological discrepancy was found between the studied G. mediotorus specimens and those of Notropis hudsonius than when considering the parasites of Notropis texanus. The separation of G. mediotorus into geographical subgroups may indicate ongoing speciation linked to the Pleistocene glaciations in North America, and to hydrographic barriers that facilitated separate evolutionary paths leading to speciation. We suggest that deep investigations of Gyrodactylus populations will help to understand the speciation of these parasites and their adaptation to Nearctic fish hosts.

Links

• LUAUS23080, research and development project: Name: Paraziti jako nový nástroj k odhalení původu a disperze sladkovodních ryb Severní Ameriky

Investor: Ministry of Education, Youth and Sports of the CR, INTER-ACTION (USA)