Estimating the density of Antarctic krill (Euphausia superba) from multi-beam echo-sounder observations using distance sampling methods

Martin James Cox, David Louis Borchers, David A. Demer, George R. Cutter, Andrew Stuart Brierley

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)301-316
Number of pages16
JournalJournal of the Royal Statistical Society: Series C (Applied Statistics)
Volume60
Issue number2
Early online date13 Jan 2011
DOIs
Publication statusPublished - Mar 2011

Keywords

  • Acoustic
  • Antarctic krill
  • Distance sampling
  • Multi-beam echo-sounder

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