Temporal and spatial variation of beaked and sperm whales foraging activity in Hawai'i, as determined with passive acoustics
Beaked and sperm whales are top predators living in the waters off the Kona coast of Hawai'i. Temporal and spatial analyses of the foraging activity of these two species were studied with passive acoustics techniques. Three passive acoustics recorders moored to the ocean floor were used to moni...
Published in: | The Journal of the Acoustical Society of America |
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ftuniaarhuspubl:oai:pure.atira.dk:publications/9f745a54-dfe4-4b47-bf94-cd2b1eb5c3c5 2024-09-15T18:18:18+00:00 Temporal and spatial variation of beaked and sperm whales foraging activity in Hawai'i, as determined with passive acoustics Giorli, Giacomo Neuheimer, Anna Copeland, Adrienne Au, Whitlow W.L. 2016-10-01 https://pure.au.dk/portal/en/publications/9f745a54-dfe4-4b47-bf94-cd2b1eb5c3c5 https://doi.org/10.1121/1.4964105 http://www.scopus.com/inward/record.url?scp=84990818391&partnerID=8YFLogxK eng eng https://pure.au.dk/portal/en/publications/9f745a54-dfe4-4b47-bf94-cd2b1eb5c3c5 info:eu-repo/semantics/restrictedAccess Giorli , G , Neuheimer , A , Copeland , A & Au , W W L 2016 , ' Temporal and spatial variation of beaked and sperm whales foraging activity in Hawai'i, as determined with passive acoustics ' , Journal of the Acoustical Society of America , vol. 140 , no. 4 , pp. 2333-2343 . https://doi.org/10.1121/1.4964105 article 2016 ftuniaarhuspubl https://doi.org/10.1121/1.4964105 2024-08-21T23:44:59Z Beaked and sperm whales are top predators living in the waters off the Kona coast of Hawai'i. Temporal and spatial analyses of the foraging activity of these two species were studied with passive acoustics techniques. Three passive acoustics recorders moored to the ocean floor were used to monitor the foraging activity of these whales in three locations along the Kona coast of the island of Hawaii. Data were analyzed using automatic detector/classification systems: M3R (Marine Mammal Monitoring on Navy Ranges), and custom-designed Matlab programs. The temporal variation in foraging activity was species-specific: beaked whales foraged more at night in the north, and more during the day-time off Kailua-Kona. No day-time/night-time preference was found in the southern end of the sampling range. Sperm whales foraged mainly at night in the north, but no day-time/night-time preference was observed off Kailua-Kona and in the south. A Generalized Linear Model was then applied to assess whether location and chlorophyll concentration affected the foraging activity of each species. Chlorophyll concentration and location influenced the foraging activity of both these species of deep-diving odontocetes. Article in Journal/Newspaper Marine Mammal Monitoring Aarhus University: Research The Journal of the Acoustical Society of America 140 4 2333 2343 |
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Open Polar |
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Aarhus University: Research |
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ftuniaarhuspubl |
language |
English |
description |
Beaked and sperm whales are top predators living in the waters off the Kona coast of Hawai'i. Temporal and spatial analyses of the foraging activity of these two species were studied with passive acoustics techniques. Three passive acoustics recorders moored to the ocean floor were used to monitor the foraging activity of these whales in three locations along the Kona coast of the island of Hawaii. Data were analyzed using automatic detector/classification systems: M3R (Marine Mammal Monitoring on Navy Ranges), and custom-designed Matlab programs. The temporal variation in foraging activity was species-specific: beaked whales foraged more at night in the north, and more during the day-time off Kailua-Kona. No day-time/night-time preference was found in the southern end of the sampling range. Sperm whales foraged mainly at night in the north, but no day-time/night-time preference was observed off Kailua-Kona and in the south. A Generalized Linear Model was then applied to assess whether location and chlorophyll concentration affected the foraging activity of each species. Chlorophyll concentration and location influenced the foraging activity of both these species of deep-diving odontocetes. |
format |
Article in Journal/Newspaper |
author |
Giorli, Giacomo Neuheimer, Anna Copeland, Adrienne Au, Whitlow W.L. |
spellingShingle |
Giorli, Giacomo Neuheimer, Anna Copeland, Adrienne Au, Whitlow W.L. Temporal and spatial variation of beaked and sperm whales foraging activity in Hawai'i, as determined with passive acoustics |
author_facet |
Giorli, Giacomo Neuheimer, Anna Copeland, Adrienne Au, Whitlow W.L. |
author_sort |
Giorli, Giacomo |
title |
Temporal and spatial variation of beaked and sperm whales foraging activity in Hawai'i, as determined with passive acoustics |
title_short |
Temporal and spatial variation of beaked and sperm whales foraging activity in Hawai'i, as determined with passive acoustics |
title_full |
Temporal and spatial variation of beaked and sperm whales foraging activity in Hawai'i, as determined with passive acoustics |
title_fullStr |
Temporal and spatial variation of beaked and sperm whales foraging activity in Hawai'i, as determined with passive acoustics |
title_full_unstemmed |
Temporal and spatial variation of beaked and sperm whales foraging activity in Hawai'i, as determined with passive acoustics |
title_sort |
temporal and spatial variation of beaked and sperm whales foraging activity in hawai'i, as determined with passive acoustics |
publishDate |
2016 |
url |
https://pure.au.dk/portal/en/publications/9f745a54-dfe4-4b47-bf94-cd2b1eb5c3c5 https://doi.org/10.1121/1.4964105 http://www.scopus.com/inward/record.url?scp=84990818391&partnerID=8YFLogxK |
genre |
Marine Mammal Monitoring |
genre_facet |
Marine Mammal Monitoring |
op_source |
Giorli , G , Neuheimer , A , Copeland , A & Au , W W L 2016 , ' Temporal and spatial variation of beaked and sperm whales foraging activity in Hawai'i, as determined with passive acoustics ' , Journal of the Acoustical Society of America , vol. 140 , no. 4 , pp. 2333-2343 . https://doi.org/10.1121/1.4964105 |
op_relation |
https://pure.au.dk/portal/en/publications/9f745a54-dfe4-4b47-bf94-cd2b1eb5c3c5 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1121/1.4964105 |
container_title |
The Journal of the Acoustical Society of America |
container_volume |
140 |
container_issue |
4 |
container_start_page |
2333 |
op_container_end_page |
2343 |
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1810456440560680960 |