|Degrees:||B.A. (Pontificia Universidad Catolica del Peru), Ph.D. (McGill)|
|Office:||CTTC 4635 (Forbes lab)|
Office hours: Monday - Friday, 8:30 - 5:00
|Website:||Visit my lab website|
The core of my work focuses on understanding the evolutionary and ecological determinants of host defense against parasites. To this end I use a combination of experimental evolution, laboratory assays, field surveys and mathematical modelling. My current projects with Mark Forbes include (1) assessing the evolution of sex-biased parasitism (i.e. the condition whereby one sex has, on average, higher parasite loads than the other), and (2) understanding how disease-diversity relationships (i.e. dilution and amplification effects) vary through spatial and temporal scales.
My past work with G. Fussman, A. Hendry and M. Scott has addressed (1) how resistance (the ability to reduce parasite loads) and tolerance (the ability to reduce the damage caused by a given parasite load) evolve under relaxed selection in experimentally manipulated wild populations, and (2) whether these traits evolve in a sex-independent manner; (3) how multifarious selection in the wild influences the evolution of mate choice; and (4) the degree to which interespecific associations (mixed-species groups), and (5) body condition affect defense. Most of this work was done using as model species Trinidadian Poecilid fishes (Poecilia reticulata and P. picta) and their harmful Gyrodactylus ectoparasites (Gyrodactylus turnbulli, G. bullatarudis and G. pictae).
Dargent, F., Rolshausen, G., Hendry, A. P., Scott, M. E., & Fussmann, G. F. (2015). Parting ways: parasite release in nature leads to sex-specific evolution of defence. Journal of Evolutionary Biology. doi: 10.1111/jeb.12758
Dargent, F., Reddon, A. R., Swaney, W. T., Fussmann, G. F., Reader, S. M., Scott, M. E., & Forbes, M. R. (2015). Demasculinization of male guppies increases resistance to a common and harmful ectoparasite. Parasitology, 142(13), 1647-1655. doi:10.1017/S0031182015001286
Dargent, F., Scott, M. E., Hendry, A. P., & Fussmann, G. F. (2014). Experimental evolution of parasite resistance in wild guppies: natural and multifarious selection. Proceedings of the Royal Society of London B: Biological Sciences, 281(1794). doi: 10.1098/rspb.2014.1820
Dargent, F., Scott, M. E., Hendry, A. P., & Fussmann, G. F. (2013). Experimental elimination of parasites in nature leads to the evolution of increased resistance in hosts. Proceedings of the Royal Society of London B: Biological Sciences, 280(1773). doi: 10.1098/rspb.2013.2371
Dargent, F., Torres-Dowdall, J., Scott, M. E., Ramnarine, I., & Fussmann, G. F. (2013). Can mixed-species groups reduce individual parasite load? A field test with two closely related poeciliid fishes Poecilia reticulata and Poecilia picta. PLOS ONE, 8(2), e56789. doi: 10.1371/journal.pone.0056789