Abundance and densities of beaked and bottlenose whales (family Ziphiidae)
Estimating the abundance and density of beaked whales is more difficult than for most other cetacean species. Consequently few estimates appear in the published literature. Field identification is problematic, especially for the smaller species, and visual detection rates decrease dramatically with...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.172.2041 2023-05-15T15:40:32+02:00 Abundance and densities of beaked and bottlenose whales (family Ziphiidae) Jay Barlow Megan C. Ferguson William F. Perrin Lisa Ballance Tim Gerrodette Gerald Joyce Colin D Keith Mullin Debra L. Palka Gordon Waring The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.172.2041 http://137.110.142.7/uploadedFiles/Divisions/PRD/Programs/Coastal_Marine_Mammal/Barlow%20et%20al.%20JCRM-06%20beakedWabund.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.172.2041 http://137.110.142.7/uploadedFiles/Divisions/PRD/Programs/Coastal_Marine_Mammal/Barlow%20et%20al.%20JCRM-06%20beakedWabund.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://137.110.142.7/uploadedFiles/Divisions/PRD/Programs/Coastal_Marine_Mammal/Barlow%20et%20al.%20JCRM-06%20beakedWabund.pdf ABUNDANCE ESTIMATE g(0 MARK-RECAPTURE SURVEY-VESSEL SURVEY-AERIAL SURVEY text ftciteseerx 2016-01-07T16:03:55Z Estimating the abundance and density of beaked whales is more difficult than for most other cetacean species. Consequently few estimates appear in the published literature. Field identification is problematic, especially for the smaller species, and visual detection rates decrease dramatically with Beaufort sea state; prior experience is very important to an observer’s ability to detect beaked whales. Passive acoustics may hold future promise for detecting beaked whales from their vocalisations, especially for the larger species. Most published estimates of abundance or density are based on visual line-transect studies that found narrower effective strip widths and lower trackline detection probabilities for beaked whales than for most other cetaceans. Published density estimates range from 0.4-44 whales per 1,000km2 for small beaked whales and up to 68 whales per 1,000km2 for large beaked whales. Mark-recapture methods based on photo-identification have been used to estimate abundance in a few cases in limited geographical areas. Focused research is needed to improve beaked whale abundance and density estimates worldwide. Text Beaufort Sea Unknown |
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ABUNDANCE ESTIMATE g(0 MARK-RECAPTURE SURVEY-VESSEL SURVEY-AERIAL SURVEY |
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ABUNDANCE ESTIMATE g(0 MARK-RECAPTURE SURVEY-VESSEL SURVEY-AERIAL SURVEY Jay Barlow Megan C. Ferguson William F. Perrin Lisa Ballance Tim Gerrodette Gerald Joyce Colin D Keith Mullin Debra L. Palka Gordon Waring Abundance and densities of beaked and bottlenose whales (family Ziphiidae) |
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ABUNDANCE ESTIMATE g(0 MARK-RECAPTURE SURVEY-VESSEL SURVEY-AERIAL SURVEY |
description |
Estimating the abundance and density of beaked whales is more difficult than for most other cetacean species. Consequently few estimates appear in the published literature. Field identification is problematic, especially for the smaller species, and visual detection rates decrease dramatically with Beaufort sea state; prior experience is very important to an observer’s ability to detect beaked whales. Passive acoustics may hold future promise for detecting beaked whales from their vocalisations, especially for the larger species. Most published estimates of abundance or density are based on visual line-transect studies that found narrower effective strip widths and lower trackline detection probabilities for beaked whales than for most other cetaceans. Published density estimates range from 0.4-44 whales per 1,000km2 for small beaked whales and up to 68 whales per 1,000km2 for large beaked whales. Mark-recapture methods based on photo-identification have been used to estimate abundance in a few cases in limited geographical areas. Focused research is needed to improve beaked whale abundance and density estimates worldwide. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Jay Barlow Megan C. Ferguson William F. Perrin Lisa Ballance Tim Gerrodette Gerald Joyce Colin D Keith Mullin Debra L. Palka Gordon Waring |
author_facet |
Jay Barlow Megan C. Ferguson William F. Perrin Lisa Ballance Tim Gerrodette Gerald Joyce Colin D Keith Mullin Debra L. Palka Gordon Waring |
author_sort |
Jay Barlow |
title |
Abundance and densities of beaked and bottlenose whales (family Ziphiidae) |
title_short |
Abundance and densities of beaked and bottlenose whales (family Ziphiidae) |
title_full |
Abundance and densities of beaked and bottlenose whales (family Ziphiidae) |
title_fullStr |
Abundance and densities of beaked and bottlenose whales (family Ziphiidae) |
title_full_unstemmed |
Abundance and densities of beaked and bottlenose whales (family Ziphiidae) |
title_sort |
abundance and densities of beaked and bottlenose whales (family ziphiidae) |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.172.2041 http://137.110.142.7/uploadedFiles/Divisions/PRD/Programs/Coastal_Marine_Mammal/Barlow%20et%20al.%20JCRM-06%20beakedWabund.pdf |
genre |
Beaufort Sea |
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Beaufort Sea |
op_source |
http://137.110.142.7/uploadedFiles/Divisions/PRD/Programs/Coastal_Marine_Mammal/Barlow%20et%20al.%20JCRM-06%20beakedWabund.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.172.2041 http://137.110.142.7/uploadedFiles/Divisions/PRD/Programs/Coastal_Marine_Mammal/Barlow%20et%20al.%20JCRM-06%20beakedWabund.pdf |
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Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766372947950305280 |