2016
DOI: 10.1242/jeb.144295
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Discrimination of fast click series produced by tagged Risso's dolphins (Grampus griseus) for echolocation or communication

Abstract: Early studies that categorized odontocete pulsed sounds had few means of discriminating signals used for biosonar-based foraging from those used for communication. This capability to identify the function of sounds is important for understanding and interpreting behavior; it is also essential for monitoring and mitigating potential disturbance from human activities. Archival tags were placed on free-ranging Grampus griseus to quantify and discriminate between pulsed sounds used for echolocation-based foraging … Show more

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Cited by 42 publications
(70 citation statements)
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“…These changes in tag placement can affect accelerometer signals, thus altering the norm-jerk and potentially leading to differences in overall detection rates [37]. There is also the possibility that missed detections were due to buzzes in which the animal aborted the prey capture attempt, buzzes made in a social context, or buzzes that were produced by a nearby conspecific [30]. When comparing the overall performance of our automated detection method against those previously developed, we observe that our detection method performed similarly despite the intentional simplicity of our detection algorithm.…”
Section: Discussionmentioning
confidence: 99%
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“…These changes in tag placement can affect accelerometer signals, thus altering the norm-jerk and potentially leading to differences in overall detection rates [37]. There is also the possibility that missed detections were due to buzzes in which the animal aborted the prey capture attempt, buzzes made in a social context, or buzzes that were produced by a nearby conspecific [30]. When comparing the overall performance of our automated detection method against those previously developed, we observe that our detection method performed similarly despite the intentional simplicity of our detection algorithm.…”
Section: Discussionmentioning
confidence: 99%
“…Rorqual lunge feeding events exhibit large peaks in the norm-jerk signal due to the sudden changes in acceleration related to the increased speed upon approach of a prey patch and the drastic decrease in acceleration caused by induced drag upon opening of the mouth [27,29,39]. Similarly, an association has been observed between strong jerk signals and buzzes, which are known to commonly represent prey capture attempts, in several odontocete species due to the rapid physical maneuvering required to catch prey items [10,30,40].…”
Section: Feeding Attempt Detectionsmentioning
confidence: 96%
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