Mating strategies and genetic constitution in the gray mouse lemur (Microcebus murinus) in Kirindy Forest, Madagaskar

• Applicant: Dr. Elise Huchard
• Subject Area: Sensory and Behavioural Biology
• Term: from 2010 to 2013
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 164132567

Classic models of sexual selection propose that many females choose mates with good genes to improve offspring genetic quality. However, field observations often contradict theory: rather than selecting a mate with intrinsically good genes, females seek multiple mates, or one that is “genetically compatible” to themselves. In addition, key predictions regarding the costs and benefits of female choice have long been overlooked in empirical research, stressing the need for truly integrative empirical designs. In this project, we will therefore combine field sampling with experimental studies for an in-depth investigation of the evolutionary determinants and mechanisms of female choice for genetic benefits in a non-human primate (Microcebus murinus). In gray mouse lemurs, females mate polyandrously during a single night per year, providing the exceptional opportunity to obtain an exhaustive record of their mating decisions in the wild. New results suggest that the Major Histocompatibility Complex (MHC) influences fertilization in natural populations. Against this background, we will first extend our understanding of MHC-dependent mating biases by clarifying the targets of female choice (good vs. compatible genes) and the mechanisms at play. Second, we will investigate the genetic benefits of female reproductive strategies by exploring MHC-mediated fitness effects using long-term field data, combined with innovative controlled mate choice experiments in captivity. Finally, we will explore the conditiondependence of female reproductive strategies using observational data and experimental settings.

• DFG Programme: Research Grants
• Participating Person: Professor Dr. Peter M. Kappeler