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Appears in Collections:Aquaculture Journal Articles
Peer Review Status: Refereed
Title: Evidence for cryptic speciation in directly transmitted gyrodactylid parasites of trinidadian guppies
Author(s): Xavier, Raquel
Faria, Patricia J
Paladini, Giuseppe
van Oosterhout, Cock
Johnson, Mireille
Cable, Joanne
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Issue Date: 9-Jan-2015
Date Deposited: 27-Jan-2016
Citation: Xavier R, Faria PJ, Paladini G, van Oosterhout C, Johnson M & Cable J (2015) Evidence for cryptic speciation in directly transmitted gyrodactylid parasites of trinidadian guppies. PLoS ONE, 10 (1), Art. No.: e0117096.
Abstract: Cryptic species complexes are common among parasites, which tend to have large populations and are subject to rapid evolution. Such complexes may arise through host-parasite co-evolution and/or host switching. For parasites that reproduce directly on their host, there might be increased opportunities for sympatric speciation, either by exploiting different hosts or different micro-habitats within the same host. The genusGyrodactylusis a specious group of viviparous monogeneans. These ectoparasites transfer between teleosts during social contact and cause significant host mortality. Their impact on the guppy (Poecilia reticulata), an iconic evolutionary and ecological model species, is well established and yet the population genetics and phylogenetics of these parasites remains understudied. Using mtDNA sequencing of the host and its parasites, we provide evidence of cryptic speciation inGyrodactylus bullatarudis,G. poeciliaeandG. turnbulli. For the COII gene, genetic divergence of lineages within each parasite species ranged between 5.7 and 17.2%, which is typical of the divergence observed between described species in this genus. Different lineages ofG. turnbulliandG. poeciliaeappear geographically isolated, which could imply allopatric speciation. In addition, forG. poeciliae, co-evolution with a different host species cannot be discarded due to its host range. This parasite was originally described onP. caucana, but for the first time here it is also recorded on the guppy. The two cryptic lineages ofG. bullatarudisshowed considerable geographic overlap.G. bullatarudishas a known wide host range and it can also utilize a killifish (Anablepsoides hartii) as a temporary host. This killifish is capable of migrating overland and it could act as a transmission vector between otherwise isolated populations. Additional genetic markers are needed to confirm the presence of these crypticGyrodactylusspecies complexes, potentially leading to more in-depth genetic, ecological and evolutionary analyses on this multi-host-parasite system.
DOI Link: 10.1371/journal.pone.0117096
Rights: © 2015 Xavier et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
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