a 2013

Evolution in congeneric monogeneans: from diversification to community structure

VETEŠNÍKOVÁ ŠIMKOVÁ, Andrea

Basic information

Original name

Evolution in congeneric monogeneans: from diversification to community structure

Authors

VETEŠNÍKOVÁ ŠIMKOVÁ, Andrea (203 Czech Republic, guarantor, belonging to the institution)

Edition

7 th International Symposium on Monogenea, 2013

Other information

Language

English

Type of outcome

Konferenční abstrakt

Field of Study

10600 1.6 Biological sciences

Country of publisher

Brazil

Confidentiality degree

není předmětem státního či obchodního tajemství

RIV identification code

RIV/00216224:14310/13:00066963

Organization unit

Faculty of Science

Keywords in English

monogenea; communitiy; host specificity; evolution; phylogeny

Abstract

V originále

Among monogeneans, there are several highly diversified genera. Majority of monogenean congeneric species exhibit a certain degree of host specificity. There are the evidences that extremely high numbers of congeneric species co-occur in one host species. Such congeneric species usually possess the interspecific variability in attachment organ and occupy the preferred niches. I focus on several aspects of evolution in congeneric monogeneans. The process of speciation has been recently investigated in several congeneric monogeneans suggesting that cospeciation does not play an important role in diversification of congeneric monogeneans. Cophylogenetic analyses using congeneric Dactylogyridae parasitizing freshwater fish revealed that these parasite groups speciated by intrahost duplication followed by host switching. Host switching was recognized as coevolutionary event in speciation of gill congeneric monogeneans parasitizing marine fish or in the case of viviparous Gyrodactylus. The analyses of evolution of host specificity in congeneric Dactylogyridae indicated that being a host specific represents the ancestral state of host specificity. The evolution of preferred niche was investigated in Dactylogyrus species using the mapping of preferred niche positions into parasite phylogenetic reconstruction. The species forming monophyletic groups and parasitizing one host species, resulting from intra-host speciation, differ in at least one of the niche parameters. The communities of congeneric monogeneans are generally considered as isolationist. The niches of many congeneric monogeneans occupying the same fish species are segregated which is explained by past competition, specialization and/or mating contacts hypotheses. The congeners possessing the similar haptor morphology tend to occupy the closely situated niche positions within host, however, differentiate in the morphology of their reproductive organs (i.e. reinforcement of reproductive isolation between congeners).

Links

GBP505/12/G112, research and development project
Name: ECIP - Evropské centrum ichtyoparazitologie
Investor: Czech Science Foundation