Shelter size influences self-assessment of size in crayfish, Orconectes rusticus : Consequences for agonistic fights Daniel T. Percival & Paul A. Moore 1) (Laboratory for Sensory Ecology, J.P. Scott Center for Neuroscience, Mind & Behaviour, Department of Biological Sciences, Bowling Green State University, Bowling Green, OH 43403, USA) (Accepted: 19 July 2009) Summary Theoretical models of animal assessment and decision strategies have assumed animals pos- sess accurate information about themselves. The imperfect nature of self-assessment could cause animals to make inaccurate decisions during agonistic encounters. By manipulating sensory information used in self-assessment in crayfish, Orconectes rusticus , it may be pos- sible to alter either decision-making paradigms or outcomes associated with agonistic en- counters. We examined the role of self-assessment in the agonistic behaviour of crayfish by using differing shelter sizes to alter self-assessment of size. Similar-sized crayfish were kept in tanks with small, medium, and large shelters (relative to body size) and subsequently were fought against size-matched, naive opponents in novel chambers to remove resource value as a variable. Crayfish in small shelter treatments initiated and won more fights than crayfish in other shelters. Crayfish in the small shelter treatment had shorter durations of fight when compared
Behaviour – Brill
Published: Jan 1, 2010
Keywords: CRAYFISH; SOCIAL HISTORY; SELF-ASSESSMENT
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