Comparison of mesopelagic organism abundance estimates using in situ target strength measurements and echo-counting techniques

Cotter, Emma; Bassett, Christopher; Lavery, Andone

doi:10.1121/10.0003940

i

Comparison of mesopelagic organism abundance estimates using in situ target strength measurements and echo-counting techniques

2021
By Cotter, Emma ; Bassett, Christopher ; Lavery, Andone
Source: JASA Express Letters, 1(4)

Details

Journal Title:

JASA Express Letters
Personal Author:

Cotter, Emma ; Bassett, Christopher ; Lavery, Andone
NOAA Program & Office:

NOAA General Documents
Description:

Recent studies using acoustic techniques suggest that the biomass of mesopelagic fishes may be an order of magnitude higher than previously estimated from trawls. However, there is uncertainty surrounding these estimates, which are derived from shipboard echosounder measurements using necessary, but poorly constrained, assumptions. Here, an echosounder is used to measure individual target strengths at depth. These measurements are used to infer mesopelagic organism density through echo-counting. Measured target strengths are used to estimate organism density by inverting shipboard echosounder measurements. The two sampling methods agree well, but highlight the importance of accurate target strength measurements.
Subjects:
- Electrical and Electronic Engineering
- Atomic and Molecular Physics, and Optics
Keywords:
- Electrical and Electronic Engineering
- Atomic and Molecular Physics, and Optics
Source:

JASA Express Letters, 1(4)
DOI:

https://doi.org/10.1121/10.0003940
ISSN:

2691-1191
Format:

PDF
Publisher:

Acoustical Society of America (ASA)
Document Type:

Journal Article
License:

https://creativecommons.org/licenses/by/4.0/
Rights Information:

CC BY
Compliance:

Library
Download URL:

https://repository.library.noaa.gov/view/noaa/58995/noaa_58995_DS1.pdf
File Type:

[PDF - 1.55 MB]
Collection(s):

NOAA General Documents
Main Document Checksum:

urn:sha256:87294bdb550d2d0bcf8d815ad590746da636945e47793b35adc812efe3b10cdb

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