A graduate position is available with Jessica Stephenson (https://stephensonlab.com/) in the Department of Zoology, Stockholm University, Stockholm, Sweden. We are looking for a highly motivated PhD student to join an international research project that investigates the role of sexual selection in epidemics. The project uses the guppy Poecilia reticulata and its gyrodactylid parasites as model organisms. Sexual selection has two important but often overlooked consequences for epidemics. First, infectious diseases spread when individuals come into contact with each other. Reproduction is an important driver of such contacts: mate choice affects who meets whom and thus the opportunities for parasite transmission. Second, individuals who choose a mate with high parasite resistance may indirectly benefit because their offspring can inherit this resistance. If such choices consistently lead to offspring being produced with genetically most resistant partners, the parasite resistance of the population may increase over generations. The PhD project will use data from existing experimental epidemics, artificial selection lines of guppy, AI-based behavioral tracking, mathematical modeling, and laboratory experiments to investigate how female mate choice affects epidemic dynamics. The PhD student will have a leading role in the experimental work, data collection and quantitative analyses, and contribute to international collaborations. You can read more about our work here: https://stephensonlab.com/ ***Apply here: https://su.varbi.com/what:job/jobID:915902/ ***Eligibility requirements To be admitted to doctoral studies, the applicant must have basic and specific eligibility requirements. The eligibility requirements must be met by the application deadline. You have basic eligibility if you have completed a degree at advanced level, or have completed course requirements of at least 240 higher education credits (ECs), of which at least 60 ECTS credits are at advanced level, or have otherwise acquired essentially equivalent knowledge within or outside the country. Specific eligibility requirements are described in the general curriculum for doctoral studies in the subject of zoology. To meet specific eligibility requirements, the applicant must have at least 120 credits in biology or a similar subject, as well as at least 30 credits in independent work. ***Further information is available from Jessica Stephenson, jess.stephenson@zoologi.su.se, and at https://su.varbi.com/what:job/jobID:915902/ Jess Stephenson (to subscribe/unsubscribe the EvolDir send mail to golding@mcmaster.ca)