The use of multibeam sonar mapping techniques to refine population estimates of the endangered white abalone (Haliotis sorenseni)

Butler, John and Neuman, Melissa and Pinkard, Deanna and Kvitek, Rikk and Cochrane, Guy (2006) The use of multibeam sonar mapping techniques to refine population estimates of the endangered white abalone (Haliotis sorenseni). Fishery Bulletin, 104(4), p. 521.

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Abstract

Multibeam sonar mapping techniques provide detailed benthic habitat information that can be combined with the data on species-specific habitat preferences to provide highly accurate calculations of populations in a particular area. The amount of suitable habitat available for the endangered white abalone (Haliotis sorenseni) was quantified to aid in obtaining an accurate estimate of the number of remaining individuals at two offshore banks and one island site off the coast of southern California. Habitat was mapped by using multibeam sonar survey techniques and categorized by using rugosity and topographic position analysis. Abalone densities were evaluated by using a remotely operated vehicle and video transect methods. The total amount of suitable habitat at these three sites was far greater than that previously estimated. Therefore, although present estimates of white abalone densities are several orders of magnitude lower than historic estimates, the total population is likely larger than previously reported because of the additional amount of habitat surveyed in this study.

Item Type: Article
Title: The use of multibeam sonar mapping techniques to refine population estimates of the endangered white abalone (Haliotis sorenseni)
Personal Creator/Author:
CreatorsEmail
Butler, John
Neuman, Melissa
Pinkard, Deanna
Kvitek, Rikk
Cochrane, Guy
Refereed: Yes
Journal or Publication Title: Fishery Bulletin
Volume: 104
Number: 4
Page Range: p. 521
Date: 2006
ISSN: 0090-0656
Issuing Agency: United States National Marine Fisheries Service
Subjects: Biology
Ecology
Fisheries
Item ID: 8945
Depositing User: Patti M. Marraro
Date Deposited: 27 Jun 2012 16:54
Last Modified: 27 Jun 2012 16:54
URI: http://aquaticcommons.org/id/eprint/8945

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