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Response properties of crayfish antennules to hydrodynamic stimuli: functional differences in the lateral and medial flagella
Monteclaro, H.M.; Anraku, K.; Matsuoka, T. (2010). Response properties of crayfish antennules to hydrodynamic stimuli: functional differences in the lateral and medial flagella. J. Exp. Biol. 213(21): 3683-3691. hdl.handle.net/10.1242/jeb.046011
In: Journal of Experimental Biology. Cambridge University Press: London. ISSN 0022-0949, more
Peer reviewed article  

Available in Authors 

Keywords
    Crustacea [WoRMS]; Marine
Author keywords
    Antennules; Mechanoreception; Flicking; Fish lateral line

Authors  Top 
  • Monteclaro, H.M.
  • Anraku, K.
  • Matsuoka, T.

Abstract
    Antennules have been reported to influence localization of distant food odors, sex discrimination, and agonistic and social behaviors of decapod crustaceans. Although olfaction by the antennules is largely recognized, information on the sensitivity of antennules to hydrodynamic stimuli has been scant. In red swamp crayfish Procambarus clarkii antennules, mechanosensory setae outnumber the chemosensory setae. We studied the mechanosensitivity of crayfish antennules by recording neural activities from isolated antennules in response to sinusoidal dipole stimuli. Both the lateral and the medial flagellum of the antennules responded to hydrodynamic stimuli, although the medial flagellum showed more sensitivity at frequencies higher than 60 Hz. The most dominant setae present on the stimulated site were the simple setal type. Although both lateral and medial flagella are capable of detecting chemical and hydrodynamic cues, results from neural responses, morphological observations and antennular behavior observations indicate that the lateral flagellum of P. clarkii functions as an olfactory organ whereas the medial flagellum complements as a hydrodynamic receptor. It appears that in crayfish antennular sensory processing, crayfish simultaneously use chemical and hydrodynamic information. We have compared our data with the threshold of fish lateral line to the same stimuli and we discuss probable similarities in response properties.

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