Detection Distances of Selected Radio and Acoustic Tags in Minnesota Lakes and Rivers

Autor: Dale E. Logsdon, Steven M. Shroyer
Rok vydání: 2009
Předmět:
Zdroj: North American Journal of Fisheries Management. 29:876-884
ISSN: 1548-8675
0275-5947
DOI: 10.1577/m08-189.1
Popis: In freshwater, the optimal choice between radiotelemetry or acoustic telemetry has often been unclear because the combined effects of tag power, conductivity, tag depth, and antenna type on radio tag detection distances have not been quantified. To enable more informed decisions regarding the best telemetry methods to use at particular study sites, we measured maximum detection distances of an acoustic tag and two different 48–49-MHz radio tags over a wide range of conductivities, depths, and acoustic conditions in Minnesota lakes and rivers. Radio tag detection distances increased with increasing tag power, decreased with increasing conductivity, and generally decreased with increasing depth. Detection distances measured with a Yagi antenna were typically about double those measured with a loop antenna. Maximum detection distances of the radio tags were predicted by the equation log eR = 13.69 − 0.005771·C − 0.006575·D + 0.1044·P + 0.7275·A − 0.001302·C·D − 0.00008208·C·P (where R = maximum dete...
Databáze: OpenAIRE
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