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crelifesciences:10.7554/elife.05651.006
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openpolar
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crelifesciences:10.7554/elife.05651.006 2023-07-23T04:19:40+02:00 Figure 3. Porpoise biosonar beam widens at short target ranges. 3 dB beamwidth recorded in two experimental setups: (A, B) three harbour porpoises closing on prey and (C, D) a harbour porpoise approaching an aluminum sphere target. (A, C) show reconstructed porpoise locations for clicks fulfilling inclusion criteria in one trial per array configuration. Targets and their projections in the x–y plane are marked with dark-blue filled and open circles, respectively. For the small array recordings (light blue in C), the target was displaced outward to 0.4 m from the array to maintain high spatial resolution at short ranges. (B) Data collected using a horizontal array with effective angular resolution (EAR) of ∼12° at ranges of target interception (N = 75). Data points from Freja, the porpoise participating in experiment two, are represented with circles. (D) Data gathered with star-shaped arrays in two configurations: large (red in C), for long-range recordings (>1.3 m from array to sound source, squares, N = 34) and small (light blue in C), for greater resolution at short ranges (<2 m from array to sound source, circles, N = 458) (see Figure 4—figure supplement 1 for a detailed view of hydrophone spacing in the two array configurations). Hydrophone spacing provided EAR of ∼5° at the shortest ranges from the source examined. Color in (B) and (D) indicates inter-click intervals (ICI), with buzz starting at 13 ms (Wisniewska et al., 2012). Buzz- and regular-click datasets in (D), used at short- and long-ranges, respectively, have different distributions, but similar medians, because during buzzes the animal repeatedly changed its beamwidth (Figure 6). Beam of the long-range clicks varied less and is better approximated by the median. 2015-04-29T11:11:24Z http://dx.doi.org/10.7554/elife.05651.006 unknown eLife Sciences Publications, Ltd component 2015 crelifesciences https://doi.org/10.7554/elife.05651.006 2023-07-05T08:52:22Z Other/Unknown Material Harbour porpoise eLife (E-Journal - via Crossref)
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| institution |
Open Polar
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| collection |
eLife (E-Journal - via Crossref)
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| op_collection_id |
crelifesciences
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| language |
unknown
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| format |
Other/Unknown Material
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| title |
Figure 3. Porpoise biosonar beam widens at short target ranges.
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| spellingShingle |
Figure 3. Porpoise biosonar beam widens at short target ranges.
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| title_short |
Figure 3. Porpoise biosonar beam widens at short target ranges.
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| title_full |
Figure 3. Porpoise biosonar beam widens at short target ranges.
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| title_fullStr |
Figure 3. Porpoise biosonar beam widens at short target ranges.
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| title_full_unstemmed |
Figure 3. Porpoise biosonar beam widens at short target ranges.
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| title_sort |
figure 3. porpoise biosonar beam widens at short target ranges.
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| publisher |
eLife Sciences Publications, Ltd
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| publishDate |
2015
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| url |
http://dx.doi.org/10.7554/elife.05651.006
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| genre |
Harbour porpoise
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| genre_facet |
Harbour porpoise
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| op_doi |
https://doi.org/10.7554/elife.05651.006
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| _version_ |
1772182983758839808
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