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The Role Of The Major Chelae In The Localization And Sampling Of Female Odours By Male Crayfish, Orconectes Rusticus (Girard, 1852)
Crustaceana (2009)
  • Rachelle M. Belanger, Bowling Green State University - Main Campus
  • Paul A. Moore, Bowling Green State University
Abstract

Research has shown that the major chelae of male crayfish, Orconectes rusticus, are important chemosensory appendages and may aid in the perception and discrimination of female odours. However, it is unclear whether the major chelae are important for localization of female odour sources. In this study, we examined the role of sensory information from the major chelae in the localization and discrimination of conspecific female odours. We analysed the behavioural reactions of form I male crayfish to two different odour treatments: reproductive female-conditioned water or water (controls) delivered from one end of a test arena. Also, all male crayfish either had their chelae intact or sensory blocked. We measured locomotory behaviours in response to odours and chelae treatments. In addition, behaviours performed at the source of the odour were quantified. Male crayfish with intact chelae spent more time closer to a reproductive female odour source, whereas crayfish with blocked chelae showed no preference. There was no response to water. Male crayfish demonstrated differences in chelae waving and other local behaviours in response to female odours. These results suggest that the major chelae are important sensory structures, which aid in the localization and discrimination of female odours.

Disciplines
Publication Date
2009
Publisher Statement
The original published version of this article may be found at http://dx.doi.org/10.1163/156854009X423210.
Citation Information
Rachelle M. Belanger and Paul A. Moore. "The Role Of The Major Chelae In The Localization And Sampling Of Female Odours By Male Crayfish, Orconectes Rusticus (Girard, 1852)" Crustaceana Vol. 82 Iss. 6 (2009)
Available at: http://works.bepress.com/paul_moore/6/