Commerson’s dolphins (Cephalorhynchus commersonii) can relax acoustic crypsis
Abstract: Toothed whales use powerful ultrasonic biosonar pulses (i.e. clicks) for echolocation. Underwater acoustic recordings have suggested that the majority of toothed whale species can be grouped acoustically as either producing broadband clicks or narrowband high-frequency (NBHF) clicks. Recen...
Published in: | Behavioral Ecology and Sociobiology |
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2021
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Online Access: | https://portal.findresearcher.sdu.dk/da/publications/03871512-18b9-4b11-ab7a-f8041bbe581f https://doi.org/10.1007/s00265-021-03035-y |
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ftsydanskunivpub:oai:sdu.dk:publications/03871512-18b9-4b11-ab7a-f8041bbe581f 2024-05-19T07:49:28+00:00 Commerson’s dolphins (Cephalorhynchus commersonii) can relax acoustic crypsis Martin, Morgan J. Torres Ortiz, Sara Reyes Reyes, M. Vanesa Marino, Alexander Iñíguez Bessega, Miguel Wahlberg, Magnus 2021-06 https://portal.findresearcher.sdu.dk/da/publications/03871512-18b9-4b11-ab7a-f8041bbe581f https://doi.org/10.1007/s00265-021-03035-y eng eng https://portal.findresearcher.sdu.dk/da/publications/03871512-18b9-4b11-ab7a-f8041bbe581f info:eu-repo/semantics/closedAccess Martin , M J , Torres Ortiz , S , Reyes Reyes , M V , Marino , A , Iñíguez Bessega , M & Wahlberg , M 2021 , ' Commerson’s dolphins (Cephalorhynchus commersonii) can relax acoustic crypsis ' , Behavioral Ecology and Sociobiology , vol. 75 , no. 6 , 100 . https://doi.org/10.1007/s00265-021-03035-y Acoustic crypsis Biosonar Cetacean Communication Echolocation UAV article 2021 ftsydanskunivpub https://doi.org/10.1007/s00265-021-03035-y 2024-04-24T00:42:05Z Abstract: Toothed whales use powerful ultrasonic biosonar pulses (i.e. clicks) for echolocation. Underwater acoustic recordings have suggested that the majority of toothed whale species can be grouped acoustically as either producing broadband clicks or narrowband high-frequency (NBHF) clicks. Recently, it has been shown that Heaviside’s dolphins, Cephalorhynchus heavisidii, emit NBHF clicks for echolocation but also clicks of lower frequency and broader bandwidth for communication. Here, we use acoustic recorders and drone video footage to reinforce previous findings that Commerson’s dolphins (C. commersonii) produce signals similar to Heaviside’s dolphins. We reveal that they use clicks with a lower frequency and broader bandwidth in the form of click trains and burst-pulses. These sounds were not recorded in the presence of smaller groups of Commerson’s dolphins, indicating that they may fulfil a communication function in larger groups. Also, we utilised a novel combination of drone video footage paired with underwater acoustic recordings to estimate the source level of echolocation clicks produced by Commerson’s dolphins. In addition, we compare the acoustic signals produced by Commerson’s and Heaviside’s dolphins to identify interspecific similarities and differences. Spectral differences were found in NBHF click trains, buzzes and burst-pulses between species; however, bandwidth and duration parameters were not significantly different for broadband click trains. Our findings make it likely that all four species of the Cephalorhynchus genus have the ability to generate both signal types, and further challenges the evolutionary concept of NBHF signal production. Significance statement: This study confirms the presence of a duel echolocation click (i.e. biosonar) strategy in Commerson’s dolphins, making them the second species of their genus known to produce two types of biosonar. We provide an in-depth quantitative analysis of Commerson’s dolphin acoustic signal types, and include a comparison of signal ... Article in Journal/Newspaper toothed whale toothed whales University of Southern Denmark Research Portal Behavioral Ecology and Sociobiology 75 6 |
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Open Polar |
collection |
University of Southern Denmark Research Portal |
op_collection_id |
ftsydanskunivpub |
language |
English |
topic |
Acoustic crypsis Biosonar Cetacean Communication Echolocation UAV |
spellingShingle |
Acoustic crypsis Biosonar Cetacean Communication Echolocation UAV Martin, Morgan J. Torres Ortiz, Sara Reyes Reyes, M. Vanesa Marino, Alexander Iñíguez Bessega, Miguel Wahlberg, Magnus Commerson’s dolphins (Cephalorhynchus commersonii) can relax acoustic crypsis |
topic_facet |
Acoustic crypsis Biosonar Cetacean Communication Echolocation UAV |
description |
Abstract: Toothed whales use powerful ultrasonic biosonar pulses (i.e. clicks) for echolocation. Underwater acoustic recordings have suggested that the majority of toothed whale species can be grouped acoustically as either producing broadband clicks or narrowband high-frequency (NBHF) clicks. Recently, it has been shown that Heaviside’s dolphins, Cephalorhynchus heavisidii, emit NBHF clicks for echolocation but also clicks of lower frequency and broader bandwidth for communication. Here, we use acoustic recorders and drone video footage to reinforce previous findings that Commerson’s dolphins (C. commersonii) produce signals similar to Heaviside’s dolphins. We reveal that they use clicks with a lower frequency and broader bandwidth in the form of click trains and burst-pulses. These sounds were not recorded in the presence of smaller groups of Commerson’s dolphins, indicating that they may fulfil a communication function in larger groups. Also, we utilised a novel combination of drone video footage paired with underwater acoustic recordings to estimate the source level of echolocation clicks produced by Commerson’s dolphins. In addition, we compare the acoustic signals produced by Commerson’s and Heaviside’s dolphins to identify interspecific similarities and differences. Spectral differences were found in NBHF click trains, buzzes and burst-pulses between species; however, bandwidth and duration parameters were not significantly different for broadband click trains. Our findings make it likely that all four species of the Cephalorhynchus genus have the ability to generate both signal types, and further challenges the evolutionary concept of NBHF signal production. Significance statement: This study confirms the presence of a duel echolocation click (i.e. biosonar) strategy in Commerson’s dolphins, making them the second species of their genus known to produce two types of biosonar. We provide an in-depth quantitative analysis of Commerson’s dolphin acoustic signal types, and include a comparison of signal ... |
format |
Article in Journal/Newspaper |
author |
Martin, Morgan J. Torres Ortiz, Sara Reyes Reyes, M. Vanesa Marino, Alexander Iñíguez Bessega, Miguel Wahlberg, Magnus |
author_facet |
Martin, Morgan J. Torres Ortiz, Sara Reyes Reyes, M. Vanesa Marino, Alexander Iñíguez Bessega, Miguel Wahlberg, Magnus |
author_sort |
Martin, Morgan J. |
title |
Commerson’s dolphins (Cephalorhynchus commersonii) can relax acoustic crypsis |
title_short |
Commerson’s dolphins (Cephalorhynchus commersonii) can relax acoustic crypsis |
title_full |
Commerson’s dolphins (Cephalorhynchus commersonii) can relax acoustic crypsis |
title_fullStr |
Commerson’s dolphins (Cephalorhynchus commersonii) can relax acoustic crypsis |
title_full_unstemmed |
Commerson’s dolphins (Cephalorhynchus commersonii) can relax acoustic crypsis |
title_sort |
commerson’s dolphins (cephalorhynchus commersonii) can relax acoustic crypsis |
publishDate |
2021 |
url |
https://portal.findresearcher.sdu.dk/da/publications/03871512-18b9-4b11-ab7a-f8041bbe581f https://doi.org/10.1007/s00265-021-03035-y |
genre |
toothed whale toothed whales |
genre_facet |
toothed whale toothed whales |
op_source |
Martin , M J , Torres Ortiz , S , Reyes Reyes , M V , Marino , A , Iñíguez Bessega , M & Wahlberg , M 2021 , ' Commerson’s dolphins (Cephalorhynchus commersonii) can relax acoustic crypsis ' , Behavioral Ecology and Sociobiology , vol. 75 , no. 6 , 100 . https://doi.org/10.1007/s00265-021-03035-y |
op_relation |
https://portal.findresearcher.sdu.dk/da/publications/03871512-18b9-4b11-ab7a-f8041bbe581f |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1007/s00265-021-03035-y |
container_title |
Behavioral Ecology and Sociobiology |
container_volume |
75 |
container_issue |
6 |
_version_ |
1799467968014319616 |