Dear all,
My co-authors and I are pleased to announce the online publication of our recent article
Quick, N.J., Callahan, H. and Read, A.J. (2017). Two-component calls in short-finned pilot whales (Globicephala macrorhynchus). Marine Mammal Science. DOI: 10.1111/mms.12452
The publication can be accessed here
http://onlinelibrary.wiley.com/doi/10.1111/mms.12452/full
Abstract
Short-finned pilot whales (Globicephala macrorhynchus) have complex vocal repertoires that include calls with two time-frequency contours known as two-component calls. We attached digital acoustic recording tags (DTAGs) to 23 short-finned
pilot whales off Cape Hatteras, North Carolina, and assessed the similarity of two-component calls within and among tags. Two-component calls made up <3% of the total number of calls on 19 of the 23 tag records. For the remaining four tags, two-component calls
comprised 9%, 23%, 24%, and 57% of the total calls recorded. Measurements of six acoustic parameters for both the low and high frequency components of all two-component calls from the five tags were compared using a generalized linear model. There were significant
differences in the acoustic parameters of two-component calls between tags, verifying that acoustic parameters were more similar for two-component calls recorded on the same tag than for calls between tags. Spectrograms of all two-component calls from the
five tags were visually graded and independently categorized by five observers. A test of inter-rater reliability showed substantial agreement, suggesting that each tag contained a predominant two-component call type that was not shared across tags.
Please contact me directly if you have any questions
Thanks
Nicola
Dr Nicola J. Quick
Research Scientist
Nicholas School of the Environment
Duke Marine Lab
135 Duke Marine Lab Road
Beaufort
NC 28516
https://scholars.duke.edu/person/nicola.quick
http://superpod.ml.duke.edu/read/
Honorary Research Fellow
School of Biology
Scottish Oceans Institute
University of St Andrews
http://biology.st-andrews.ac.uk/contact/staffProfile.aspx?sunid=njq