Data from: Heaviside's dolphins (Cephalorhynchus heavisidii) relax acoustic crypsis to increase communication range
The costs of predation may exert significant pressure on the mode of communication used by an animal, and many species balance the benefits of communication (e.g. mate attraction) against the potential risk of predation. Four groups of toothed whales have independently evolved narrowband high-freque...
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Online Access: | https://doi.org/10.5061/dryad.64048p0 https://doi.org/10.5061/dryad.64048p0.1 https://doi.org/10.5061/dryad.64048p0.2 |
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fttriple:oai:gotriple.eu:50|dedup_wf_001::3db21c9c676086359d0e1710b34131b0 2023-05-15T18:33:33+02:00 Data from: Heaviside's dolphins (Cephalorhynchus heavisidii) relax acoustic crypsis to increase communication range Martin, Morgan J. Gridley, Tess Elwen, Simon H. Jensen, Frants H. 2018-06-28 https://doi.org/10.5061/dryad.64048p0 https://doi.org/10.5061/dryad.64048p0.1 https://doi.org/10.5061/dryad.64048p0.2 undefined unknown http://dx.doi.org/10.5061/dryad.64048p0 http://dx.doi.org/10.5061/dryad.64048p0.1 https://dx.doi.org/10.5061/dryad.64048p0.1 https://dx.doi.org/10.5061/dryad.64048p0.2 https://dx.doi.org/10.5061/dryad.64048p0 http://dx.doi.org/10.5061/dryad.64048p0.2 lic_creative-commons oai:services.nod.dans.knaw.nl:Products/dans:oai:easy.dans.knaw.nl:easy-dataset:104584 10.5061/dryad.64048p0.1 oai:easy.dans.knaw.nl:easy-dataset:104584 10.5061/dryad.64048p0.2 10.5061/dryad.64048p0 10|eurocrisdris::fe4903425d9040f680d8610d9079ea14 10|openaire____::9e3be59865b2c1c335d32dae2fe7b254 10|re3data_____::94816e6421eeb072e7742ce6a9decc5f re3data_____::r3d100000044 10|re3data_____::84e123776089ce3c7a33db98d9cd15a8 Life sciences medicine and health care acoustic crypsis active space communication echolocation Heaviside's dolphin narrowband high-frequency clicks Namibia Southern Africa Benguela Current Holocene Cephalorhynchus heavisidii present envir geo Dataset https://vocabularies.coar-repositories.org/resource_types/c_ddb1/ 2018 fttriple https://doi.org/10.5061/dryad.64048p0 https://doi.org/10.5061/dryad.64048p0.1 https://doi.org/10.5061/dryad.64048p0.2 2023-01-22T16:53:11Z The costs of predation may exert significant pressure on the mode of communication used by an animal, and many species balance the benefits of communication (e.g. mate attraction) against the potential risk of predation. Four groups of toothed whales have independently evolved narrowband high-frequency (NBHF) echolocation signals. These signals help NBHF species avoid predation through acoustic crypsis by echolocating and communicating at frequencies inaudible to predators such as mammal-eating killer whales. Heaviside’s dolphins (Cephalorhynchus heavisidii) are thought to exclusively produce NBHF echolocation clicks with a centroid frequency around 125 kHz and little to no energy below 100 kHz. To test this, we recorded wild Heaviside’s dolphins in a sheltered bay in Namibia. We demonstrate that Heaviside’s dolphins produce a second type of click with lower frequency and broader bandwidth in a frequency range that is audible to killer whales. These clicks are used in burst-pulses and occasional click series but not foraging buzzes. We evaluate three different hypotheses and conclude that the most likely benefit of these clicks is to decrease transmission directivity and increase conspecific communication range. The expected increase in active space depends on background noise but ranges from 2.5 (Wenz Sea State 6) to 5 times (Wenz Sea State 1) the active space of NBHF signals. This dual click strategy therefore allows these social dolphins to maintain acoustic crypsis during navigation and foraging, and to selectively relax their crypsis to facilitate communication with conspecifics. Martin et al. 2018 Supplementary Data from Heaviside's dolphins (Cephalorhynchus heavisidii) relax acoustic crypsis to increase communication rangeThis .wav file includes an example of each pulsed signal type described for Heaviside's dolphins in Martin et al. 2018. The signal types are in the order: 1) broadband click train, 2) burst-pulse, 3) buzz and 4) NBHF click train.Martin et al. 2018 Supplementary Data.wavMartin et al. 2018 ... Dataset toothed whales Unknown |
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Open Polar |
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topic |
Life sciences medicine and health care acoustic crypsis active space communication echolocation Heaviside's dolphin narrowband high-frequency clicks Namibia Southern Africa Benguela Current Holocene Cephalorhynchus heavisidii present envir geo |
spellingShingle |
Life sciences medicine and health care acoustic crypsis active space communication echolocation Heaviside's dolphin narrowband high-frequency clicks Namibia Southern Africa Benguela Current Holocene Cephalorhynchus heavisidii present envir geo Martin, Morgan J. Gridley, Tess Elwen, Simon H. Jensen, Frants H. Data from: Heaviside's dolphins (Cephalorhynchus heavisidii) relax acoustic crypsis to increase communication range |
topic_facet |
Life sciences medicine and health care acoustic crypsis active space communication echolocation Heaviside's dolphin narrowband high-frequency clicks Namibia Southern Africa Benguela Current Holocene Cephalorhynchus heavisidii present envir geo |
description |
The costs of predation may exert significant pressure on the mode of communication used by an animal, and many species balance the benefits of communication (e.g. mate attraction) against the potential risk of predation. Four groups of toothed whales have independently evolved narrowband high-frequency (NBHF) echolocation signals. These signals help NBHF species avoid predation through acoustic crypsis by echolocating and communicating at frequencies inaudible to predators such as mammal-eating killer whales. Heaviside’s dolphins (Cephalorhynchus heavisidii) are thought to exclusively produce NBHF echolocation clicks with a centroid frequency around 125 kHz and little to no energy below 100 kHz. To test this, we recorded wild Heaviside’s dolphins in a sheltered bay in Namibia. We demonstrate that Heaviside’s dolphins produce a second type of click with lower frequency and broader bandwidth in a frequency range that is audible to killer whales. These clicks are used in burst-pulses and occasional click series but not foraging buzzes. We evaluate three different hypotheses and conclude that the most likely benefit of these clicks is to decrease transmission directivity and increase conspecific communication range. The expected increase in active space depends on background noise but ranges from 2.5 (Wenz Sea State 6) to 5 times (Wenz Sea State 1) the active space of NBHF signals. This dual click strategy therefore allows these social dolphins to maintain acoustic crypsis during navigation and foraging, and to selectively relax their crypsis to facilitate communication with conspecifics. Martin et al. 2018 Supplementary Data from Heaviside's dolphins (Cephalorhynchus heavisidii) relax acoustic crypsis to increase communication rangeThis .wav file includes an example of each pulsed signal type described for Heaviside's dolphins in Martin et al. 2018. The signal types are in the order: 1) broadband click train, 2) burst-pulse, 3) buzz and 4) NBHF click train.Martin et al. 2018 Supplementary Data.wavMartin et al. 2018 ... |
format |
Dataset |
author |
Martin, Morgan J. Gridley, Tess Elwen, Simon H. Jensen, Frants H. |
author_facet |
Martin, Morgan J. Gridley, Tess Elwen, Simon H. Jensen, Frants H. |
author_sort |
Martin, Morgan J. |
title |
Data from: Heaviside's dolphins (Cephalorhynchus heavisidii) relax acoustic crypsis to increase communication range |
title_short |
Data from: Heaviside's dolphins (Cephalorhynchus heavisidii) relax acoustic crypsis to increase communication range |
title_full |
Data from: Heaviside's dolphins (Cephalorhynchus heavisidii) relax acoustic crypsis to increase communication range |
title_fullStr |
Data from: Heaviside's dolphins (Cephalorhynchus heavisidii) relax acoustic crypsis to increase communication range |
title_full_unstemmed |
Data from: Heaviside's dolphins (Cephalorhynchus heavisidii) relax acoustic crypsis to increase communication range |
title_sort |
data from: heaviside's dolphins (cephalorhynchus heavisidii) relax acoustic crypsis to increase communication range |
publishDate |
2018 |
url |
https://doi.org/10.5061/dryad.64048p0 https://doi.org/10.5061/dryad.64048p0.1 https://doi.org/10.5061/dryad.64048p0.2 |
genre |
toothed whales |
genre_facet |
toothed whales |
op_source |
oai:services.nod.dans.knaw.nl:Products/dans:oai:easy.dans.knaw.nl:easy-dataset:104584 10.5061/dryad.64048p0.1 oai:easy.dans.knaw.nl:easy-dataset:104584 10.5061/dryad.64048p0.2 10.5061/dryad.64048p0 10|eurocrisdris::fe4903425d9040f680d8610d9079ea14 10|openaire____::9e3be59865b2c1c335d32dae2fe7b254 10|re3data_____::94816e6421eeb072e7742ce6a9decc5f re3data_____::r3d100000044 10|re3data_____::84e123776089ce3c7a33db98d9cd15a8 |
op_relation |
http://dx.doi.org/10.5061/dryad.64048p0 http://dx.doi.org/10.5061/dryad.64048p0.1 https://dx.doi.org/10.5061/dryad.64048p0.1 https://dx.doi.org/10.5061/dryad.64048p0.2 https://dx.doi.org/10.5061/dryad.64048p0 http://dx.doi.org/10.5061/dryad.64048p0.2 |
op_rights |
lic_creative-commons |
op_doi |
https://doi.org/10.5061/dryad.64048p0 https://doi.org/10.5061/dryad.64048p0.1 https://doi.org/10.5061/dryad.64048p0.2 |
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1766218187660066816 |