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Fig. 10 | Animal Biotelemetry

Fig. 10

From: Potential utility of geomagnetic data for geolocation of demersal fishes in the North Pacific Ocean

Fig. 10

Histograms of the difference between the daily magnetic field measurements recorded by the five moored archival tags over the course of the 8-month deployment and the value of the fine-scale magnetic field map at the mooring location in Glacier Bay National Park, Alaska, USA. Colored polygons indicate range of tag resolutions used to define likelihoods for four levels of tag resolution in fish movement trajectories simulated via hidden Markov modeling. For example, to calculate the likelihood using the lowest tag resolution (blue), grid cell magnetic field probability density is integrated by limits of the daily measurement ± 1000 nT. Medium resolution (green) integrates the cell probability by ± 500 nT, high resolution (orange) by ± 300 nT, and very high resolution (red) by ± 150 nT. DS-1 would be considered a low-resolution tag because the histogram falls within the blue polygon, whereas DS-2 would be equivalent to a medium-resolution tag in the simulations because the histogram falls within the green polygon

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