Echo strength and density structure of Hawaiian mesopelagic boundary community patches.

  title={Echo strength and density structure of Hawaiian mesopelagic boundary community patches.},
  author={Kelly J Benoit-Bird and Whitlow W. L. Au},
  journal={The Journal of the Acoustical Society of America},
  volume={114 4 Pt 1},
A broadband sonar system and digital camera with strobe lights were mounted on a vertically profiling frame with a depth sensor. The echo strengths and densities of animals within individual mesopelagic boundary community patches were investigated as a function of depth. Time and distance from shore were also investigated. Simultaneous surface echosounder surveys permitted comparison of density estimates from two techniques. Echo strength values suggest nearshore boundary community animals are… CONTINUE READING
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