| infections of gyrodactylus bullatarudis and gyrodactylus turnbulli on guppies (poecilia reticulata) in trinidad. | gyrodactylus bullatarudis turnbull, 1956, and gyrodactylus turnbulli harris, 1986, are recorded from guppies (poecilia reticulata) from the northern mountains of trinidad. mixed infections of the 2 species were found at 9 localities. gyrodactylus turnbulli had a predominantly posterior distribution on the fishes, whereas g. bullatarudis was more anteriorly distributed. this is the first record of these species from guppies collected from within their original range. | 1992 | 1403438 |
| gyrodactylus pictae n. sp. (monogenea: gyrodactylidae) from the trinidadian swamp guppy poecilia picta regan, with a discussion on species of gyrodactylus von nordmann, 1832 and their poeciliid hosts. | gyrodactylus pictae n. sp. is recorded from poecilia picta in heterospecific shoals with the guppy p. reticulata in northern trinidad. g. pictae is morphologically similar to g. turnbulli harris, 1986, but the hamuli and marginal hooks are slightly smaller and more gracile. the toe and the point of the marginal hook have a distinctly different shape, providing the best morphological characters for distinguishing the two species. the rdna its1 and its2 sequences differ from those of g. turnbulli ... | 2005 | 15864453 |
| selection by parasites in spate conditions in wild trinidadian guppies (poecilia reticulata). | gyrodactylids are ubiquitous fish parasites and yet, with the notable exception of gyrodactylus salaris, few studies have reported the effect of these parasites on host survival in natural populations. here, we assess the impact of the parasite load of gyrodactylids (g. turnbulli and g. bullatarudis) on the survival and migration of guppies (poecilia reticulata) in their natural habitat of the aripo river in trinidad. the recapture rate of males declined by 19% with every additional parasite, a ... | 2007 | 17307185 |
| the impact of parasites on the life history evolution of guppies (poecilia reticulata): the effects of host size on parasite virulence. | there is large spatial and temporal variation in the gyrodactylus parasite fauna across natural guppy (poecilia reticulata) populations in trinidad. the life history evolution of these fish could be affected differently in the various habitats depending on the local parasite selection pressure. here, we experimentally infected three guppy populations with three gyrodactylid strains in the laboratory and monitored the infection by recording the number of parasites and host mortality in a full fac ... | 2007 | 17561023 |