IHPE – MATHIEU-BEGNE Eglantine english

photo_EMB
EDB Toulouse
et
IHPE UMR 5244
University of Perpignan via Domitia
52 Avenue Paul Alduy
F-66860 Perpignan Cedex FRANCE
Tel +33(0)4-68-66-20-50
Fax +33(0)4-68-66-22-81
email : eglantine.mb@gmail.com
POSITION: Ph.D student (Resume english french)
THESIS DIRECTORS: Géraldine Loot (EDB, Toulouse), Simon Blanchet (SETE, Moulis) et Olivier Rey (IHPE, Perpignan)
TEAM: Sevab
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THESIS SUBJECT:
Infestation mechanisms of the freshwater fish ectoparasite Tracheliastes polycolpus
KEYWORDS:
Parasitism ; Genomics ; Super-spreaders
THESIS PROJECT:
An eco-evolutionary enigma resides in our understanding of why a few hosts highly aggregate parasites whereas a majority is weakly infected. Hosts that aggregate parasites can have strong impact on the transmission dynamic of parasites, and are recognized as “super-spreaders”. However, how super-spreaders emerge in wild populations remains poorly understood since it requires a deep understanding of the factors that are critical during the infestation process.
In this PhD project, I aim to study the emergence of super-spreaders emergence in the light of the two concepts known as the encounter filter (factors required so the encounter between host and parasite could happen) and the compatibility filter (factors required so parasites could settle durably in the host). Due to the three-way interactions existing between host, parasite and their common environment, environmental factors favoring the contact between hosts and parasites as well as intrinsic host and parasite characteristics (i.e. resistance and virulence but also the role of host microbiota) determining their compatibility are likely involved in infestation processes. To study these factors and their role in each filter, we will focus on the interaction between the ectoparasite Tracheliastes polycolpus and different freshwater fish species known as being potential hosts.
Specifically I aim to i) assess T. polycolpus impact on its host from molecular basis to phenotypic alterations, ii)  test for an association between micro-habitat environmental features and parasite burden through a descriptive and experimental design (encountering filter), (iii) revealing the molecular basis involved in infestation processes through a transcriptomic approach (compatibility filter), and (iv) evaluate the role of host microbiota through a semi-experimental design.
RESUME:
2015-2016: Master 2 “Biodiversity Ecology and Evolution”,  University Paul Sabatier Toulouse III
2014-2015: Master 1 “Ecology”, University Paul Sabatier de Toulouse III
2011-2014: License “Biology of Organisms, Populations and Ecosystems”, University Paul Sabatier Toulouse III
2010-2011: “Classe Préparatoire aux Grandes Ecoles” in the field of Literatures and Social Sciences, Montaigne High school in Bordeaux
2009-2010: Science bachelor’s degree, Champollion High school (Figeac, 46)
LAST PUBLICATIONS:
Mathieu-Bégné, E., Loot, G., Blanchet, S., Toulza, E., Genthon, C. & Rey, O. (2019a). De novo transcriptome assembly for Tracheliastes polycolpus, an invasive ectoparasite of freshwater fish in western Europe. Marine Genomics.
Mathieu-Bégné, E., Loot, G., Chevalier, M., Paz-Vinas, I. & Blanchet, S. (2019b). Demographic and genetic collapses in spatially structured populations: insights from a long-term survey in wild fish metapopulations. Oikos, 128, 196–207.