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Digital electromagnetic telemetry system for studying behaviour of decapod crustaceans

Digital electromagnetic telemetry system for studying behaviour of decapod crustaceans
Digital electromagnetic telemetry system for studying behaviour of decapod crustaceans
A telemetry system for studying decapod crustacean behaviour is described which uses low frequency, digitally encoded electromagnetic tags whose signals are detected with a grid of loop aerials on the seabed. Electromagnetic telemetry can be used to study short range movements of cryptic animals in topographically complex habitats that are not amenable to ultrasonic telemetry. Digital encoding allows many individuals to be monitored simultaneously and one or more behavioural, physiological or environmental variables to be telemetered. In the present system, tag signals convey identity and a measure of activity derived from an integral tilt switch. Translocational movements are indicated by detection of tags with different aerials. A central data logger located on the seabed decodes and records tag signals and environmental measurements. Design life of tags is >1 year and the receiving system batteries are replaced by divers at intervals of up to 4 weeks. In field tests, crab (Cancer pagurus L.) and lobster (Homarus gammarus (L.)) activity was monitored at an artificial reef for 14 months. Examples of the type of information acquired are presented to illustrate the capabilities of the system and potential applications are discussed. Limitations of digital electromagnetic telemetry stem mainly from the short range of detection, the need for cables on the seabed and the size and shape of the transmitting tag.
CRUSTACEANS, CRABS, LOBSTERS, TELEMETRY, TAGS
0022-0981
209-222
Smith, I.P.
751766ba-dd51-4419-a5ad-a582d9c45c6e
Collins, K.J.
9c436eb8-add5-460e-9900-5d1d128dc63d
Jensen, A.C.
ff1cabd2-e6fa-4e34-9a39-5097e2bc5f85
Smith, I.P.
751766ba-dd51-4419-a5ad-a582d9c45c6e
Collins, K.J.
9c436eb8-add5-460e-9900-5d1d128dc63d
Jensen, A.C.
ff1cabd2-e6fa-4e34-9a39-5097e2bc5f85

Smith, I.P., Collins, K.J. and Jensen, A.C. (2000) Digital electromagnetic telemetry system for studying behaviour of decapod crustaceans. Journal of Experimental Marine Biology and Ecology, 247 (2), 209-222. (doi:10.1016/S0022-0981(00)00149-0).

Record type: Article

Abstract

A telemetry system for studying decapod crustacean behaviour is described which uses low frequency, digitally encoded electromagnetic tags whose signals are detected with a grid of loop aerials on the seabed. Electromagnetic telemetry can be used to study short range movements of cryptic animals in topographically complex habitats that are not amenable to ultrasonic telemetry. Digital encoding allows many individuals to be monitored simultaneously and one or more behavioural, physiological or environmental variables to be telemetered. In the present system, tag signals convey identity and a measure of activity derived from an integral tilt switch. Translocational movements are indicated by detection of tags with different aerials. A central data logger located on the seabed decodes and records tag signals and environmental measurements. Design life of tags is >1 year and the receiving system batteries are replaced by divers at intervals of up to 4 weeks. In field tests, crab (Cancer pagurus L.) and lobster (Homarus gammarus (L.)) activity was monitored at an artificial reef for 14 months. Examples of the type of information acquired are presented to illustrate the capabilities of the system and potential applications are discussed. Limitations of digital electromagnetic telemetry stem mainly from the short range of detection, the need for cables on the seabed and the size and shape of the transmitting tag.

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More information

Published date: 2000
Keywords: CRUSTACEANS, CRABS, LOBSTERS, TELEMETRY, TAGS

Identifiers

Local EPrints ID: 8758
URI: https://eprints.soton.ac.uk/id/eprint/8758
ISSN: 0022-0981
PURE UUID: c9d58358-768e-4ed6-84ca-c1eedef2f8b7

Catalogue record

Date deposited: 27 Aug 2004
Last modified: 17 Jul 2017 17:12

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