Journal
JOURNAL OF THE ROYAL STATISTICAL SOCIETY SERIES C-APPLIED STATISTICS
Volume 60, Issue -, Pages 301-316Publisher
WILEY
DOI: 10.1111/j.1467-9876.2010.00748.x
Keywords
Acoustic; Antarctic krill; Distance sampling; Multi-beam echo-sounder
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Funding
- Royal Society
- UK Natural Environment Research Council
- National Science Foundation [06-OPP-33939]
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Antarctic krill is a key species in the Antarctic food web, an important prey item for marine predators and a commercial fishery resource. Although single-beam echo-sounders are commonly used to survey the species, multi-beam echo-sounders may be more efficient because they sample a larger volume of water. However, multi-beam echo-sounders may miss animals because they involve lower energy densities. We adapt distance sampling theory to deal with this and to estimate krill density and biomass from a multi-beam echo-sounder survey. The method provides a general means for estimating density and biomass from multi-beam echo-sounder data.
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