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ICES Journal of Marine Science: Journal du Conseil Advance Access originally published online on March 24, 2009
ICES Journal of Marine Science: Journal du Conseil 2009 66(6):1278-1283; doi:10.1093/icesjms/fsp051
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© 2009 International Council for the Exploration of the Sea. Published by Oxford Journals. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org

This article appears in the following ICES Journal of Marine Science issue: The Ecosystem Approach with Fisheries Acoustics and Complementary Technologies [View the issue table of contents]

A study of the relationship between tag-signal characteristics and achievable performances in acoustic fish-tag studies

John E. Ehrenberg and Tracey W. Steig

Hydroacoustic Technology Inc., 715 NE Northlake Way, Seattle, WA 98105, USA

Correspondence to J. E. Ehrenberg: tel: +1 206 633 3383; fax: +1 206 633 5912; e-mail: consulting{at}htisonar.com

Ehrenberg, J. E., and Steig, T. W. 2009. A study of the relationship between tag-signal characteristics and achievable performances in acoustic fish-tag studies. – ICES Journal of Marine Science, 66: 1278–1283.

Acoustic tags have been used in fish-behaviour studies in a variety of marine and freshwater environments. The intended objectives of these studies vary widely. In some cases, they require accurate three-dimensional tracking of the individual fish locations. In other cases, tags are used for estimating fish survival along a migration route. There are varieties of schemes that have been proposed and used for implementing tag systems. The purpose of this paper is to explain the relationship between the various characteristics of acoustic signals transmitted by the tags and the tag-system performance that can be achieved. In particular, the ranges at which the tags can be detected and uniquely identified, the positional accuracy, and the number of unique codes that can be assigned to individual fish are all functions of the signal type. This paper demonstrates that when the pulse-repetition period is used to encode the tag identification, the range performance for the tag is superior to that achieved using a scheme that has binary-encoded bits as part of the transmitter signal. The parametric results presented will assist investigators in their selection of the type of acoustic tags or tag parameters needed to achieve the objectives of acoustic fish-tag studies.

Keywords: acoustic tags, acoustic-tag performance, fish behaviour, fish telemetry, fish tracking

Received 29 July 2008; accepted 23 December 2008; advance access publication 24 March 2009.


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