标题：Endohelmintos parásitos del pez vivíparo Zoogoneticus purhepechus (Cyprinodontiformes: Goodeidae) en dos manantiales de la cuenca del bajo Lerma, México
摘要：In order to establish the helminthological record of the viviparous fish species Zoogoneticus purhepechus, 72 individuals were collected from two localities, La Luz spring (n = 45) and Los Negritos spring (n = 27), both in the lower Lerma River, in Michoacán state, Mexico. Twelve helminth taxa were recovered: the digeneans Margotrema bravoae, Clinostomum complanatum, and Phyllodistomum sp., the cestodes Bothriocephalus acheilognathi and the cysticercoids of Cyclophyllidea, the nematodes Rhabdochona lichtenfelsi, Rhabdochona sp., Eustrongylides sp., Contracaecum sp. and Spiroxys sp., and the acanthocephalans Pomphorhynchus bulbocolli and Polymorphus brevis. Of these, R. lichtenfelsi was the most frequent and abundant species at La Luz spring. The remaining species were relatively more rare and infrequent. The helminth parasite community of Z. purhepechus in Los Negritos spring was remarkably poor and abundance was very low. Feeding habits, the position of the host species in the food web, and the environmental characteristics of each locality are suggested as the main factors determining the helminth parasite communities in this host species.
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