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Hearing and morphological specializations of the mojarra (Eucinostomus argenteus)
Parmentier, E.; Mann, K.; Mann, D. (2011). Hearing and morphological specializations of the mojarra (Eucinostomus argenteus). J. Exp. Biol. 214(16): 2697-2701. dx.doi.org/10.1242/jeb.058750
In: Journal of Experimental Biology. Cambridge University Press: London. ISSN 0022-0949, more
Peer reviewed article  

Available in Authors 

Keyword
    Marine
Author keywords
    acoustic; audition; swimbladder

Authors  Top 
  • Parmentier, E., more
  • Mann, K.
  • Mann, D.

Abstract
    The air-filled swimbladder acts as an acoustic amplifier for some fish by converting sound pressure into particle motion, which is transmitted to the inner ear. Here, we describe in detail the specialized connection between the swimbladder and ear in the mojarra, as well as a modified cone on the anal fin in which the posterior end of the swimbladder sits. Hearing tests show the mojarra has better hearing sensitivity than other species of fish without a connection. However, mojarras do not seem to use this adaptation for communication. Furthermore, the inclined position of the swimbladder may help the fish to catch their prey more easily, as the swimbladder will be horizontal when they are picking up benthic prey.

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