| Autor: |
Brittany G. Sullivan, Shannon H. Clarke, Daniel P. Struthers, Mark K. Taylor, Steven J. Cooke |
| Jazyk: |
angličtina |
| Rok vydání: |
2019 |
| Předmět: |
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| Zdroj: |
Animal Biotelemetry, Vol 7, Iss 1, Pp 1-6 (2019) |
| Druh dokumentu: |
article |
| ISSN: |
2050-3385 |
| DOI: |
10.1186/s40317-019-0168-4 |
| Popis: |
Abstract Background Manual tracking has been used since the 1970s as an effective radio telemetry approach for evaluating habitat use of fish in fluvial systems. Radio tags are often located by continually reducing the gain when approaching the tag along a watercourse to estimate its location, termed here as the ‘Gain Reduction Method’. However, to our knowledge the accuracy of this method has not been empirically evaluated and reported in the literature. Here, the longitudinal and lateral positional errors of radio tags are assessed when applying the Gain Reduction Method in a small stream environment. Longitudinal and lateral positional errors (i.e. the difference between the estimated and actual radio tag location) were evaluated based on the distance from the actual tag position, the gain recorded when estimating the tag position and a number of environmental parameters (i.e. stream depth, velocity, stream width and specific conductivity). Results The manual tracking trials produced an average lateral positional error of 0.91 m (± 1.4) and a longitudinal positional error of 0.66 m (± 0.87). A larger degree of longitudinal positional error was documented when the gain was higher (t = 2.21, p |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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