, 97:53

Release from bats: genetic distance and sensoribehavioural regression in the Pacific field cricket, Teleogryllus oceanicus


    • Department of BiologyUniversity of Toronto Mississauga
  • Hannah M. ter Hofstede
    • Department of BiologyUniversity of Toronto Mississauga
    • School of Biological SciencesUniversity of Bristol
  • John M. Ratcliffe
    • Center for Sound Communication, Institute of BiologyUniversity of Southern Denmark
  • Gerald S. Pollack
    • Department of BiologyMcGill University
  • Gian S. Brigidi
    • Department of BiologyMcGill University
  • Robin M. Tinghitella
    • Department of BiologyUniversity of California-Riverside
    • Department of Ecology and Evolutionary BiologyUniversity of Michigan
  • Marlene Zuk
    • Department of BiologyUniversity of California-Riverside

DOI: 10.1007/s00114-009-0610-1

Cite this article as:
Fullard, J.H., ter Hofstede, H.M., Ratcliffe, J.M. et al. Naturwissenschaften (2010) 97: 53. doi:10.1007/s00114-009-0610-1


The auditory thresholds of the AN2 interneuron and the behavioural thresholds of the anti-bat flight-steering responses that this cell evokes are less sensitive in female Pacific field crickets that live where bats have never existed (Moorea) compared with individuals subjected to intense levels of bat predation (Australia). In contrast, the sensitivity of the auditory interneuron, ON1 which participates in the processing of both social signals and bat calls, and the thresholds for flight orientation to a model of the calling song of male crickets show few differences between the two populations. Genetic analyses confirm that the two populations are significantly distinct, and we conclude that the absence of bats has caused partial regression in the nervous control of a defensive behaviour in this insect. This study represents the first examination of natural evolutionary regression in the neural basis of a behaviour along a selection gradient within a single species.


NeuroethologyGenetic isolationEvolutionSensory ecologyIsland biology

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Copyright information

© Springer-Verlag 2009