Monitoring cetaceans in the North Pacific: analysis of retrospective SOSUS data and acoustic detection on the Northern Edge Range
To comply with environmental laws, the U.S. Navy has increasingly relied on acoustic detection and tracking for marine mammal monitoring/mitigation. In the North Pacific, much of what is known about large whale seasonal occurrence comes from Sound Surveillance System (SOSUS) arrays. SOSUS provides b...
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ftnavalpschool:oai:calhoun.nps.edu:10945/717 2024-06-23T07:51:49+00:00 Monitoring cetaceans in the North Pacific: analysis of retrospective SOSUS data and acoustic detection on the Northern Edge Range Stafford, Kathleen Oceanography (OC) Naval Postgraduate School (U.S.) Graduate School of Engineering and Applied Science (GSEAS) Office of the Chief of Naval Operations (U.S.) Oceanography 2010-12 iii, 31 p.: col. ill.;28 cm. application/pdf https://hdl.handle.net/10945/717 unknown Monterey, California. Naval Postgraduate School NPS-OC-10-006CR ocn706498807 https://hdl.handle.net/10945/717 This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States. SOSUS Blue whale Finback whale Marine mammals Cetacea Toothed whales Technical Report 2010 ftnavalpschool 2024-06-11T14:17:29Z To comply with environmental laws, the U.S. Navy has increasingly relied on acoustic detection and tracking for marine mammal monitoring/mitigation. In the North Pacific, much of what is known about large whale seasonal occurrence comes from Sound Surveillance System (SOSUS) arrays. SOSUS provides broad basin-scale assessments of large whale seasonal occurrence, but cannot provide detail at the regional level, in particular here for the Navy's Northern Edge (Training) Range in the northern Gulf of Alaska. Here, data from long-term acoustic observations of basin-wide data, and from a short-term, nearshore acoustic deployment in the NER, are presented. For the long-term observations, Navy-analyst derived detections of blue and fin whales were compared with spectral data to determine if there is a reliable way to separate the two species in the spectral data. Although the degree to which detections matched the spectra varied with frequency range, generally blue and fin whale detections matched the spectra. However, when only blue, and no fin, whales (or vice versa) were detected by analysts, there were no discernable differences in the spectral levels of different frequency ranges. This suggests that, absent other confirmation of the presence of blue and fin whale vocalizations, these species cannot be reliably discerned from spectra data alone in regions and seasons where the two overlap. Report Blue whale Fin whale Marine Mammal Monitoring toothed whales Alaska Naval Postgraduate School: Calhoun Gulf of Alaska Ner ENVELOPE(6.622,6.622,62.612,62.612) Pacific |
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Open Polar |
collection |
Naval Postgraduate School: Calhoun |
op_collection_id |
ftnavalpschool |
language |
unknown |
topic |
SOSUS Blue whale Finback whale Marine mammals Cetacea Toothed whales |
spellingShingle |
SOSUS Blue whale Finback whale Marine mammals Cetacea Toothed whales Stafford, Kathleen Monitoring cetaceans in the North Pacific: analysis of retrospective SOSUS data and acoustic detection on the Northern Edge Range |
topic_facet |
SOSUS Blue whale Finback whale Marine mammals Cetacea Toothed whales |
description |
To comply with environmental laws, the U.S. Navy has increasingly relied on acoustic detection and tracking for marine mammal monitoring/mitigation. In the North Pacific, much of what is known about large whale seasonal occurrence comes from Sound Surveillance System (SOSUS) arrays. SOSUS provides broad basin-scale assessments of large whale seasonal occurrence, but cannot provide detail at the regional level, in particular here for the Navy's Northern Edge (Training) Range in the northern Gulf of Alaska. Here, data from long-term acoustic observations of basin-wide data, and from a short-term, nearshore acoustic deployment in the NER, are presented. For the long-term observations, Navy-analyst derived detections of blue and fin whales were compared with spectral data to determine if there is a reliable way to separate the two species in the spectral data. Although the degree to which detections matched the spectra varied with frequency range, generally blue and fin whale detections matched the spectra. However, when only blue, and no fin, whales (or vice versa) were detected by analysts, there were no discernable differences in the spectral levels of different frequency ranges. This suggests that, absent other confirmation of the presence of blue and fin whale vocalizations, these species cannot be reliably discerned from spectra data alone in regions and seasons where the two overlap. |
author2 |
Oceanography (OC) Naval Postgraduate School (U.S.) Graduate School of Engineering and Applied Science (GSEAS) Office of the Chief of Naval Operations (U.S.) Oceanography |
format |
Report |
author |
Stafford, Kathleen |
author_facet |
Stafford, Kathleen |
author_sort |
Stafford, Kathleen |
title |
Monitoring cetaceans in the North Pacific: analysis of retrospective SOSUS data and acoustic detection on the Northern Edge Range |
title_short |
Monitoring cetaceans in the North Pacific: analysis of retrospective SOSUS data and acoustic detection on the Northern Edge Range |
title_full |
Monitoring cetaceans in the North Pacific: analysis of retrospective SOSUS data and acoustic detection on the Northern Edge Range |
title_fullStr |
Monitoring cetaceans in the North Pacific: analysis of retrospective SOSUS data and acoustic detection on the Northern Edge Range |
title_full_unstemmed |
Monitoring cetaceans in the North Pacific: analysis of retrospective SOSUS data and acoustic detection on the Northern Edge Range |
title_sort |
monitoring cetaceans in the north pacific: analysis of retrospective sosus data and acoustic detection on the northern edge range |
publisher |
Monterey, California. Naval Postgraduate School |
publishDate |
2010 |
url |
https://hdl.handle.net/10945/717 |
long_lat |
ENVELOPE(6.622,6.622,62.612,62.612) |
geographic |
Gulf of Alaska Ner Pacific |
geographic_facet |
Gulf of Alaska Ner Pacific |
genre |
Blue whale Fin whale Marine Mammal Monitoring toothed whales Alaska |
genre_facet |
Blue whale Fin whale Marine Mammal Monitoring toothed whales Alaska |
op_relation |
NPS-OC-10-006CR ocn706498807 https://hdl.handle.net/10945/717 |
op_rights |
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States. |
_version_ |
1802642957694664704 |