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DEPE | Séminaires BEEPSS / BEEPSS Seminars » Mini-Symposium DEPE PhD Students

Mini-Symposium DEPE PhD Students

Last update: : Monday 8 October 2018, by Nicolas Busser

Presented by: Agnès Saulnier, Fernanda de la Fuente and Jeffrey Roth
Date: Thursday 11th October 2018, 13:00-14:30
Place: IPHC, Amphithéâtre Grünewald, bâtiment 25

13:00-13:20: Agnès Saulnier

Study of the eco-toxicological effects of micropollutant cocktail in birds

My PhD project aims to study effects of urban pollution on physiological and demographic parameters on great tits (Parus major). Through environmental and oxidative stress and telomeres (an indicator of longevity) measurements we will try to understand the role of urban environment on individual selection. It is difficult in a natural population to tease apart the effects of pollutants from various other parameters. We will thus develop in a second part of the project an in-laboratory experimental approach on zebra finches.

13:20-13:40: Fernanda de la Fuente

Balancing contest competition, scramble competition, and social tolerance at feeding sites in wild common marmosets

We investigated how ecological and social factors affected foraging strategies and individual feeding success in wild groups of common marmosets (Callithrix jacchus). Except for the dominant breeding female, rank was not a strong predictor of feeding success. Group members’ relatively similar success across changing experimental conditions of food distribution and productivity was accomplished using a balance of behavioral mechanisms including forms of competition and tolerance. It seems that the cooperative infant caregiving system of the species require a set of behavioral strategies that serve to reduce agonism and promote prosocial behaviors at feeding sites.

13:40-14:00: Jeffrey Roth

Testing the thermal mismatch hypothesis: costs of parasitism on host physiological stress, health and fitness in a changing world.

The thermal mismatch (TM) hypothesis proposes that parasites are better able to tolerate fluctuating temperatures than their hosts. With increasing variability in temperature due to climate change, conditions under which the TM hypothesis operates are becoming more common. In my research, I have artificially exposed Columbian ground squirrels (Urocitellus columbianus) to elevated levels of fleas to assess parasite costs during such temperature shifts. This will allow a better understanding of the co-evolution of host-parasite traits and whether their interactions are likely to be exacerbated in the current context of global change.