Validating variation in radio-signal strength as an index of aquatic fauna activity

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Title Validating variation in radio-signal strength as an index of aquatic fauna activity
Author Thiem, Jason D.; Ebner, Brendan Craig; Clear, Rhian C.
Journal Name Australian Journal of Zoology
Year Published 2010
Place of publication Australia
Publisher CSIRO Publishing
Abstract Studying biological rhythms of activity and determining the external factors that influence behaviour of animals can be challenging in many aquatic habitats. We investigated the validity of using variations in radio-signal strength to quantify changes in activity of radio-tagged aquatic fauna on a small spatial scale under controlled conditions in the field. We monitored short-term activity (<1 min) of two aquatic species, rainbow trout (Oncorhynchus mykiss) and Murray River crayfish (Euastacus armatus), that differ markedly in their primary mode of movement. Simultaneous video monitoring confirmed that active and inactive periods for both species could be accurately determined by radio-telemetry, as were specific behaviours exhibited by trout. We were also able to quantify activity based on different radio-tag (coil and trailing whip antennas) and receiving antenna configurations (yagi and gap-loop antennas); however, we recommend use of control tags to provide reference data. Variation in radio-signal strength represents a valid means of monitoring activity of moderately site-attached aquatic species.
Peer Reviewed Yes
Published Yes
Alternative URI http://dx.doi.org/10.1071/ZO09110
Volume 58
Issue Number 1
Page from 50
Page to 55
ISSN 0004-959X
Date Accessioned 2010-11-16
Date Available 2011-03-07T08:56:38Z
Language en_AU
Faculty Faculty of Science, Environment, Engineering and Technology
Subject Zoology
URI http://hdl.handle.net/10072/36960
Publication Type Journal Articles (Refereed Article)
Publication Type Code c1

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