Role of the olfactory pathway in agonistic behavior of crayfish, <Emphasis Type="Italic">Procambarus clarkii</Emphasis> |
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Authors: | Amy J Horner Manfred Schmidt Donald H Edwards Charles D Derby |
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Institution: | (1) Department of Biology, Brains and Behavior Program, Center for Behavioral Neuroscience, Georgia State University, P.O. Box 4010, Atlanta, GA 30302-4010, USA |
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Abstract: | Crayfish establish social dominance hierarchies through agonistic interactions, and these hierarchies are maintained through
assessment of social status. Chemical signals influence several aspects of fighting behavior, but the specific chemosensory
sensilla involved in detecting these signals in crayfish are unknown. The goal of our study was to examine the importance
of aesthetasc sensilla—olfactory sensors on the antennules of decapod crustaceans—in regulating changes in fighting behavior
in crayfish, Procambarus clarkii, over the course of repeated pairings. We selectively ablated aesthetascs from pairs of crayfish after the first day of trials
and compared the behavior of these ablated animals to that of pairs of intact controls. Results show that unablated crayfish
significantly decreased the number and duration of fights over repeated pairings, whereas crayfish lacking aesthetascs continued
to engage in similar amounts of fighting across all three trial days. This difference shows that aesthetascs regulate fighting
behavior in P. clarkii. |
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Keywords: | Aesthetasc Antennule Chemical senses Crustacea Fighting Social behavior |
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