Estimating the Density of Antarctic Krill ( Euphausia Superba) from Multi-Beam Echo-Sounder Observations Using Distance Sampling Methods
Summary 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 v...
Published in: | Journal of the Royal Statistical Society: Series C (Applied Statistics) |
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Main Authors: | , , , , |
Other Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Oxford University Press (OUP)
2011
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Subjects: | |
Online Access: | http://dx.doi.org/10.1111/j.1467-9876.2010.00748.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1467-9876.2010.00748.x https://academic.oup.com/jrsssc/article-pdf/60/2/301/49549433/jrsssc_60_2_301.pdf |
Summary: | Summary 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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