flag france Isabelle Charrier
Zoologist • France

Isabelle Charrier is associate researcher at the CNRS laboratory “Neurobiologie de l'Apprentissage, de la Mémoire et de la Communication” (Neurobiology of Learning, Memory and Communication). Member of the bioacoustics team, she investigates the coding-decoding processes of individual recognition between mother and offspring, and how individual recognition systems vary in regards to ecological and environmental constraints. Pinnipeds are an excellent model to study vocal communication since they show different social structures (from solitary to highly colonial species) and different reproductive systems (from serial monogamous to highly polygynous species). Involvement of other sensorial modalities in individual recognition mechanisms such as vision and olfactory are also investigated. To answer to this question, she uses different methods: behavioral observations, calls recordings, acoustic analysis of vocalizations, and playback experiments in the field with natural and synthetic signals.

During her PhD research, she spent 10 months in the field on Amsterdam Island (1999-2000) to study Subantarctic fur seals (Arctocephalus tropicalis). She is now working in collaboration with Pr. Rob Harcourt since 2005, director of the Marine Mammal Research Group (Macquarie University, Sydney) to study the individual recognition system of Australian Sea lions. Since 2006, she is studying walrus in Arctic (Nunavut, Canada) in collaboration with DFO-Canada researchers, but also in captivity in collaboration with the Dolfinarium in Harderwijk (Netherlands) and l’Oceanographic in Valencia (Spain).

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• Charrier, I., Aubin, T. & Mathevon, N. Calf’s vocal recognition by Atlantic walrus mothers: ecological constraints and adaptations. Submitted to Animal Cognition Charrier I., Pitcher B. J. & Harcourt R. G. In press. Vocal recognition of mothers by Australian sea lion pups: individual signature and environmental constraints. Animal Behaviour.
• Pitcher B. J., Ahonen H., Harcourt R. G. & Charrier I. 2009. Delayed onset of vocal recognition in Australian sea lion pups (Neophoca cinerea). Naturwissenschaften 96, 901-909.
• Tripovich J. S., Charrier I., Rogers T. L., Canfield R., Arnould J. P.Y. 2010.Acoustic features involved in the neighbour-stranger vocal recognition process in male Australian fur seals. Behavioural Processes
• Tripovich J. S., Charrier I., Rogers T. L., Canfield R., Arnould J. P.Y. 2010. Who goes there? Differential responses to neighbor and stranger vocalizations in male Australian fur seals. Marine Mammal Science
• Gwilliam J., Charrier I. & Harcourt R. G. 2008. Vocal identity and species recognition in Male Australian Sea Lions, Neophoca cinerea. The Journal of Experimental Biology 211, 2288-2295.
• Aubin T., Charrier I., Courvoisier H., Rybak F. 2008. Penguins and Otariids as Models for the Study of Individual Vocal Recognition in the Noisy Environment of a Colony. In (ed) Benjamin N. Weiss, New research on acoustics. Nova Science Publishers, NY.
• Charrier I. & Harcourt R. G. 2006. Individual Vocal Identity in Mother and Pup Australian sea lion Neophoca cinerea. Journal of Mammalogy, 87(5), 929-938. Mathevon N., Charrier I., Aubin T. 2004. A memory like a female Fur Seal: long-lasting recognition of pup's voice by mothers. In: Advances in Bioacoustics, vol. I (Vielliard JME, Silva MLD & Suthers RA, Eds), Rio de Janeiro: Anais da Academia Brasileira de Ciências.
• Charrier I., Mathevon N. & Jouventin P. 2003. Fur seal mother memorizes growing pup’s voice steps: Adaptation to the long-term recognition or evolutionary by-product? Biological Journal of the Linnean Society, 80, 305-312.
• Insley S., Phillips A.V. & Charrier I. 2003. A review of social recognition in pinnipeds. Aquatic Mammals, 29(2),181-201. Charrier I., Mathevon N. & Jouventin P. 2003. Vocal signature recognition of mothers by fur seal pups. Animal Behaviour, 65, 543-550. Charrier I., Mathevon N., & Jouventin P. 2003. Individuality in the voice of fur seal females: an analysis study of the Pup Attraction Call in Arctocephalus tropicalis. Marine Mammal Science, 19, 161-172.
• Charrier I., Mathevon N., Hassnaoui M., Carraro L. & , Jouventin P. 2002. The subantarctic fur seal pup switches its begging behaviour during maternal absence. Canadian Journal of Zoology, 80, 1250-1255.
• Charrier I., Mathevon N. & Jouventin P. 2002. How does a fur seal mother recognize the voice of her pup ? An experimental study of Arctocephalus tropicalis. Journal of Experimental Biology, 605, 603-612.
• Charrier I., Mathevon N. & Jouventin P. 2001. Mother's voice recognition by seal pups. Nature, 412, 873.
• Charrier I., Mathevon N., Jouventin P.& Aubin T. 2001. Acoustic communication in a Black-headed Gull colony: How do chicks identify their parents ? Ethology, 107, 961-974.
• Charrier I., Jouventin P., Mathevon N. & Aubin T. 2001. Potentiality of individual identity coding depends on call type in the South Polar Skua Catharacta maccormicki. Polar Biology, 24, 378-382.
• Charrier I. 2002. Publication: Le contrôle vocal d'identité chez les Otaries. Pour La Science

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