Data from: Pace of life, predators and parasites: predator-induced life history evolution in Trinidadian guppies predicts decrease in parasite tolerance
Stephenson, Jessica F., Cardiff University
van Oosterhout, C., University of East Anglia
Cable, Joanne, Cardiff University
Published Oct 12, 2015 on Dryad.
Cite this dataset
Stephenson, Jessica F.; van Oosterhout, C.; Cable, Joanne (2015). Data from: Pace of life, predators and parasites: predator-induced life history evolution in Trinidadian guppies predicts decrease in parasite tolerance [Dataset]. Dryad. https://doi.org/10.5061/dryad.3pf61
A common evolutionary response to predation pressure is increased investment in reproduction, ultimately resulting in a fast life history. Theory and comparative studies suggest that short-lived organisms invest less in defence against parasites than those that are longer lived (the pace of life hypothesis). Combining these tenets of evolutionary theory leads to the specific, untested prediction that within species, populations experiencing higher predation pressure invest less in defence against parasites. The Trinidadian guppy, Poecilia reticulata, presents an excellent opportunity to test this prediction: guppy populations in lower courses of rivers experience higher predation pressure, and as a consequence have evolved faster life histories, than those in upper courses. Data from a large-scale field survey showed that fish infected with Gyrodactylus parasites were of a lower body condition (quantified using the scaled mass index) than uninfected fish, but only in lower course populations. Although the evidence we present is correlational, it suggests that upper course guppies sustain lower fitness costs of infection, i.e. are more tolerant, than lower course guppies. The data are therefore consistent with the pace of life hypothesis of parasite defence allocation, and suggest that life-history traits mediate the indirect effect of predators on the parasites of their prey.
Data for Pace of life, predators and parasites: Stephenson et al. Biology Letters
These data are from guppies, Poecilia reticulata, from several sample sites across Trinidad. For each fish, we recorded the sex, weight, condition (using the scaled mass index), and the presence and number of Gyrodactylus spp. parasites infecting the fish. We provide the drainage, river, course and site, as well as the nested terms where appropriate, where each fish was collected.