Translator Disclaimer
1 February 2013 Molecular Phylogeny and Host Specificity of the Larval Eustrongylides (Nematoda: Dioctophmidae) From Freshwater Fish in China
Fan Xiong, Wen X. Li, Shan G. Wu, Hong Zou, Gui T. Wang
Author Affiliations +
Abstract

The nematodes Eustrongylides spp. collected from different fish species in China were examined for their intra- and interspecific evolutionary variations using the molecular markers mitochondrial cytochrome oxidase c subunit 1 (COI) gene and internal transcribed spacer (ITS) rDNA regions. The phylogenetic analysis indicated that Eustrongylides species are divided into 3 well-supported clades. The ITS divergence between the clades suggested that clades 2 and 3 might represent the same species, whereas clade 1 represent another cryptic species. The host specificity of these nematodes was analyzed according to prevalence data, host range, and phylogenetic information. Clade 1 was found in 4 fish species, i.e., Odontobutis obscurus, Silurus asotus, Culter mongolicus, and Acanthogobius flavimanus, but was predominant in the 2 perciform species, O. obscurus and A. flavimanus. Clade 2 was found in 3 fish species, Monopterus albus, Channa argus, and Channa asiatica, but was predominant in M. albus, reported to feed primarily on oligochaetes, the first intermediate host of Eustrongylides sp. Clade 3 was found in 9 species, but its low prevalence suggests accidental infection in all species. Although the larval nematode presented low host specificity, it exhibited some host preference.

Fan Xiong, Wen X. Li, Shan G. Wu, Hong Zou, and Gui T. Wang "Molecular Phylogeny and Host Specificity of the Larval Eustrongylides (Nematoda: Dioctophmidae) From Freshwater Fish in China," Journal of Parasitology 99(1), 137-144, (1 February 2013). https://doi.org/10.1645/GE-3163.1
Received: 31 March 2012; Accepted: 1 July 2012; Published: 1 February 2013
JOURNAL ARTICLE
8 PAGES


SHARE
ARTICLE IMPACT
RIGHTS & PERMISSIONS
Get copyright permission
Back to Top