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First published online April 18, 2008
Journal of Experimental Biology 211, 1504-1511 (2008)
Published by The Company of Biologists 2008
doi: 10.1242/jeb.016196
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Acoustic pressure and particle motion thresholds in six sciaenid fishes

Andrij Z. Horodysky1,*, Richard W. Brill2, Michael L. Fine3, John A. Musick1 and Robert J. Latour1

1 Department of Fisheries Science, Virginia Institute of Marine Science, College of William and Mary, Gloucester Point, VA 23062, USA
2 Cooperative Marine Education and Research Program, Northeast Fisheries Science Center, National Marine Fisheries Service, NOAA, Woods Hole, MA, USA
3 Department of Biology, Virginia Commonwealth University, Richmond, VA, USA


Figure 1
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  		Fig. 1. Sample 500 Hz waveforms: (A) a pure tone 500 Hz stimulus waveform, (B) an echo-canceled 500 Hz stimulus and (C) a 500 Hz signal that was not echo-canceled. B and C were recorded in our experimental chamber by the submersed, omnidirectional hydrophone.

 

Figure 2
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  		Fig. 2. Sample ABR waveforms from each species, obtained in response to echo-canceled 500 Hz pure tone bursts: weakfish, spotted seatrout, Atlantic croaker, red drum, spot and northern kingfish. Black and grey lines are replicate ABR responses at a given attenuation that each result from the addition of two ABR recordings of opposite polarities. Numbers indicate sound pressure levels (SPL; dB re: 1 µPa).

 

Figure 3
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  		Fig. 3. Audiograms of (A) mean sound pressure (SPL) in dB re: 1 µPa, (B) mean velocity in cm s–1 and (C) mean acceleration in cm s–2 for six sciaenid species: spotted seatrout (filled blue circles), weakfish (open grey circles), Atlantic croaker (filled green triangles), red drum (open red triangles), spot (filled black squares) and northern kingfish (open brown squares). Respective means and standard errors are presented in Table S1 in supplementary material.

 

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© The Company of Biologists Ltd 2008