Comparing repertoires of sperm whale codas: a multiple methods approach.
A common task for researchers of animal vocalisations is statistically comparing repertoires, or sets of vocalisations. We evaluated five methods of comparing repertoires of `codas', short repeated patterns of clicks, recorded from sperm whale (Physeter macrocephalus) groups. Three of the metho...
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ftunstandrewcris:oai:risweb.st-andrews.ac.uk:publications/2ff71ad5-b10a-4ef9-8af6-bfd307b13096 2023-05-15T17:59:21+02:00 Comparing repertoires of sperm whale codas: a multiple methods approach. Rendell, Luke Edward Whitehead, H 2003 https://risweb.st-andrews.ac.uk/portal/en/researchoutput/comparing-repertoires-of-sperm-whale-codas-a-multiple-methods-approach(2ff71ad5-b10a-4ef9-8af6-bfd307b13096).html http://www.scopus.com/inward/record.url?scp=0013375564&partnerID=8YFLogxK eng eng info:eu-repo/semantics/restrictedAccess Rendell , L E & Whitehead , H 2003 , ' Comparing repertoires of sperm whale codas: a multiple methods approach. ' , Bioacoustics , vol. 14 , pp. 61-81 . cluster analysis classification vocal repertoire sperm whale codas PHYSETER-MACROCEPHALUS BEHAVIOR VOCALIZATIONS DIALECTS article 2003 ftunstandrewcris 2021-12-26T14:13:52Z A common task for researchers of animal vocalisations is statistically comparing repertoires, or sets of vocalisations. We evaluated five methods of comparing repertoires of `codas', short repeated patterns of clicks, recorded from sperm whale (Physeter macrocephalus) groups. Three of the methods involved classification of codas - human observer classification, k-means cluster analysis using Calinski and Harabasz's (1974) criterion to determine k, and a divisive k-means clustering procedure using Duda and Hart's (1973) criterion to determine k. Two other methods used multivariate distances to calculate similarity measures between coda repertoires. When used on a sample coda dataset, observer classification failed to produce consistent results. Calinski and Harabasz's criterion did not provide a clear signal for determining the number of coda classes (k). Divisive clustering using Duda and Hart's criterion performed satisfactorily and, encouragingly, gave similar results to the multivariate similarity measures when used on our data. However, the relative performance of the k-means techniques is likely data dependent, so one method is not likely to perform best in all circumstances. Thus results should be checked to ensure they extract logical clusters. Using these techniques concurrently with multivariate measures allows the drawing of relatively robust conclusions about repertoire similarity while minimising uncertainties due to questionable validity of classifications. Article in Journal/Newspaper Physeter macrocephalus Sperm whale University of St Andrews: Research Portal Duda ENVELOPE(-67.183,-67.183,-68.800,-68.800) |
institution |
Open Polar |
collection |
University of St Andrews: Research Portal |
op_collection_id |
ftunstandrewcris |
language |
English |
topic |
cluster analysis classification vocal repertoire sperm whale codas PHYSETER-MACROCEPHALUS BEHAVIOR VOCALIZATIONS DIALECTS |
spellingShingle |
cluster analysis classification vocal repertoire sperm whale codas PHYSETER-MACROCEPHALUS BEHAVIOR VOCALIZATIONS DIALECTS Rendell, Luke Edward Whitehead, H Comparing repertoires of sperm whale codas: a multiple methods approach. |
topic_facet |
cluster analysis classification vocal repertoire sperm whale codas PHYSETER-MACROCEPHALUS BEHAVIOR VOCALIZATIONS DIALECTS |
description |
A common task for researchers of animal vocalisations is statistically comparing repertoires, or sets of vocalisations. We evaluated five methods of comparing repertoires of `codas', short repeated patterns of clicks, recorded from sperm whale (Physeter macrocephalus) groups. Three of the methods involved classification of codas - human observer classification, k-means cluster analysis using Calinski and Harabasz's (1974) criterion to determine k, and a divisive k-means clustering procedure using Duda and Hart's (1973) criterion to determine k. Two other methods used multivariate distances to calculate similarity measures between coda repertoires. When used on a sample coda dataset, observer classification failed to produce consistent results. Calinski and Harabasz's criterion did not provide a clear signal for determining the number of coda classes (k). Divisive clustering using Duda and Hart's criterion performed satisfactorily and, encouragingly, gave similar results to the multivariate similarity measures when used on our data. However, the relative performance of the k-means techniques is likely data dependent, so one method is not likely to perform best in all circumstances. Thus results should be checked to ensure they extract logical clusters. Using these techniques concurrently with multivariate measures allows the drawing of relatively robust conclusions about repertoire similarity while minimising uncertainties due to questionable validity of classifications. |
format |
Article in Journal/Newspaper |
author |
Rendell, Luke Edward Whitehead, H |
author_facet |
Rendell, Luke Edward Whitehead, H |
author_sort |
Rendell, Luke Edward |
title |
Comparing repertoires of sperm whale codas: a multiple methods approach. |
title_short |
Comparing repertoires of sperm whale codas: a multiple methods approach. |
title_full |
Comparing repertoires of sperm whale codas: a multiple methods approach. |
title_fullStr |
Comparing repertoires of sperm whale codas: a multiple methods approach. |
title_full_unstemmed |
Comparing repertoires of sperm whale codas: a multiple methods approach. |
title_sort |
comparing repertoires of sperm whale codas: a multiple methods approach. |
publishDate |
2003 |
url |
https://risweb.st-andrews.ac.uk/portal/en/researchoutput/comparing-repertoires-of-sperm-whale-codas-a-multiple-methods-approach(2ff71ad5-b10a-4ef9-8af6-bfd307b13096).html http://www.scopus.com/inward/record.url?scp=0013375564&partnerID=8YFLogxK |
long_lat |
ENVELOPE(-67.183,-67.183,-68.800,-68.800) |
geographic |
Duda |
geographic_facet |
Duda |
genre |
Physeter macrocephalus Sperm whale |
genre_facet |
Physeter macrocephalus Sperm whale |
op_source |
Rendell , L E & Whitehead , H 2003 , ' Comparing repertoires of sperm whale codas: a multiple methods approach. ' , Bioacoustics , vol. 14 , pp. 61-81 . |
op_rights |
info:eu-repo/semantics/restrictedAccess |
_version_ |
1766168148559527936 |