title: Phylogeographical pattern of Mazocraeoides gonialosae (Monogenea, Mazocraeidae) on the dotted gizzard shad, Konosirus punctatus, along the coast of China.
abstract: In the present study, we examined the phylogeographical pattern of the monogenean, Mazocraeoides gonialosae, which parasitises the dotted gizzard shad (Konosirus punctatus) along the coast of China. Fragments of 756 bp of the mitochondrial cytochrome c oxidase subunit I gene were sequenced for 147 individuals from seven localities along the coast of China. Phylogenetic analysis revealed no significant genealogical clades of samples corresponding to sampling localities. Analyses of molecular variance and pairwise F(ST) suggested a high rate of gene flow and the lack of a predictable genetic structure between different populations of this parasite. Both neutrality tests and mismatch distribution analyses indicated a recent population expansion in M. gonialosae after the last glacial maximum. Gradually decreasing genetic diversity in more northerly populations implied a historical south-to-north expansion of this parasite. Dispersal of eggs and larvae with ocean currents was considered to be associated with the genetic homogeneity of this species. The limited time to accumulate genetic variation after the last glacial maximum may also account in part for the lack of phylogeographical structure in the studied region.
authors.affiliation: State Key Laboratory of Biocontrol and Center for Parasitic Organisms, School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China.
authors.forename: Min
authors.initials: M
authors.lastname: Li
authors.forename: Su-Fen
authors.initials: SF
authors.lastname: Shi
authors.forename: Christopher L
authors.initials: CL
authors.lastname: Brown
authors.forename: Ting-Bao
authors.initials: TB
authors.lastname: Yang
mesh_terms: D000818:Animals; D002681:China; D016000:Cluster Analysis; D018509:DNA, Helminth / Q000737:chemistry / Q000235:genetics; D004272:DNA, Mitochondrial / Q000737:chemistry / Q000235:genetics; D003576:Electron Transport Complex IV; D019143:Evolution, Molecular; D051456:Gene Flow; D000070559:Gizzard, Non-avian / Q000469:parasitology*; D008969:Molecular Sequence Data; D058974:Phylogeography; D010986:Platyhelminths / Q000145:classification* / Q000235:genetics / Q000302:isolation & purification*; D017422:Sequence Analysis, DNA
chemical_list: D018509:DNA, Helminth; D004272:DNA, Mitochondrial; D003576:Electron Transport Complex IV