Results of low-frequency playback of M-sequence noise to humpback whales, Megaptera novaeangliae , in Hawai′i
The behavior of humpback whales, Megaptera novaeangliae, exposed to playback of low-frequency sounds, was examined to test whether animals would respond to this signal when received sound levels exceeded 120 dB re: 1 µPa. The source signal was an M-sequence (essentially a sine wave with a series of...
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1998
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crcansciencepubl:10.1139/z97-223 2023-12-17T10:31:27+01:00 Results of low-frequency playback of M-sequence noise to humpback whales, Megaptera novaeangliae , in Hawai′i Frankel, A S Clark, C W 1998 http://dx.doi.org/10.1139/z97-223 http://www.nrcresearchpress.com/doi/pdf/10.1139/z97-223 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Zoology volume 76, issue 3, page 521-535 ISSN 0008-4301 1480-3283 Animal Science and Zoology Ecology, Evolution, Behavior and Systematics journal-article 1998 crcansciencepubl https://doi.org/10.1139/z97-223 2023-11-19T13:38:40Z The behavior of humpback whales, Megaptera novaeangliae, exposed to playback of low-frequency sounds, was examined to test whether animals would respond to this signal when received sound levels exceeded 120 dB re: 1 µPa. The source signal was an M-sequence (essentially a sine wave with a series of phase reversals) centered at 75 Hz with a 30-Hz bandwidth. Behavior and movements of whales were described before, during, and after playback. Eighty-five trials were conducted, of which 50 had an experimental condition of M-sequence playback. Thirty-four were no-sound controls and a single trial used a playback of the Alaska humpback whale feeding call. The received playback sound level at the whales ranged from ambient level ( approx 90 dB) to 130 dB re: 1 µPa (60-90 Hz). A comparison revealed no difference in whale tracks and bearings between control and playback conditions. Behavior rates were examined statistically using independent variables describing pod composition, nearby vessels, and playback sound level. Natural variables of pod composition were the most important factors predicting behavior rates. Vessels had a larger impact and affected more behavioral variables than playback. A slight increase in the duration and distance between successive surfacings was found as the received playback sound level increased. Eleven playbacks in which whales passed within the 120-dB isopleth yielded only three potential responses (one movement away and two toward the sound source) and eight nonresponses. Overall, subtle responses to M-sequence playbacks could only be detected statistically, but the biological significance of these responses is uncertain. Article in Journal/Newspaper Humpback Whale Megaptera novaeangliae Alaska Canadian Science Publishing (via Crossref) Canadian Journal of Zoology 76 3 521 535 |
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Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics |
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Animal Science and Zoology Ecology, Evolution, Behavior and Systematics Frankel, A S Clark, C W Results of low-frequency playback of M-sequence noise to humpback whales, Megaptera novaeangliae , in Hawai′i |
topic_facet |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics |
description |
The behavior of humpback whales, Megaptera novaeangliae, exposed to playback of low-frequency sounds, was examined to test whether animals would respond to this signal when received sound levels exceeded 120 dB re: 1 µPa. The source signal was an M-sequence (essentially a sine wave with a series of phase reversals) centered at 75 Hz with a 30-Hz bandwidth. Behavior and movements of whales were described before, during, and after playback. Eighty-five trials were conducted, of which 50 had an experimental condition of M-sequence playback. Thirty-four were no-sound controls and a single trial used a playback of the Alaska humpback whale feeding call. The received playback sound level at the whales ranged from ambient level ( approx 90 dB) to 130 dB re: 1 µPa (60-90 Hz). A comparison revealed no difference in whale tracks and bearings between control and playback conditions. Behavior rates were examined statistically using independent variables describing pod composition, nearby vessels, and playback sound level. Natural variables of pod composition were the most important factors predicting behavior rates. Vessels had a larger impact and affected more behavioral variables than playback. A slight increase in the duration and distance between successive surfacings was found as the received playback sound level increased. Eleven playbacks in which whales passed within the 120-dB isopleth yielded only three potential responses (one movement away and two toward the sound source) and eight nonresponses. Overall, subtle responses to M-sequence playbacks could only be detected statistically, but the biological significance of these responses is uncertain. |
format |
Article in Journal/Newspaper |
author |
Frankel, A S Clark, C W |
author_facet |
Frankel, A S Clark, C W |
author_sort |
Frankel, A S |
title |
Results of low-frequency playback of M-sequence noise to humpback whales, Megaptera novaeangliae , in Hawai′i |
title_short |
Results of low-frequency playback of M-sequence noise to humpback whales, Megaptera novaeangliae , in Hawai′i |
title_full |
Results of low-frequency playback of M-sequence noise to humpback whales, Megaptera novaeangliae , in Hawai′i |
title_fullStr |
Results of low-frequency playback of M-sequence noise to humpback whales, Megaptera novaeangliae , in Hawai′i |
title_full_unstemmed |
Results of low-frequency playback of M-sequence noise to humpback whales, Megaptera novaeangliae , in Hawai′i |
title_sort |
results of low-frequency playback of m-sequence noise to humpback whales, megaptera novaeangliae , in hawai′i |
publisher |
Canadian Science Publishing |
publishDate |
1998 |
url |
http://dx.doi.org/10.1139/z97-223 http://www.nrcresearchpress.com/doi/pdf/10.1139/z97-223 |
genre |
Humpback Whale Megaptera novaeangliae Alaska |
genre_facet |
Humpback Whale Megaptera novaeangliae Alaska |
op_source |
Canadian Journal of Zoology volume 76, issue 3, page 521-535 ISSN 0008-4301 1480-3283 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/z97-223 |
container_title |
Canadian Journal of Zoology |
container_volume |
76 |
container_issue |
3 |
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521 |
op_container_end_page |
535 |
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1785584757661237248 |