Fluctuations in distribution and patterns of individual range use of northern bottlenose whales.
This study investigated the pattern and scale of distribution, movements and range use of the northern bottlenose whale Hyperoodon ampullatus above a submarine canyon, the Gully, off eastern Canada between 1988 and 1998. Locations and individual identification photographs were collected during encou...
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ftunstandrewcris:oai:risweb.st-andrews.ac.uk:publications/2b7c321c-2a65-427d-9b48-7b8e4eb3241b 2023-05-15T16:36:26+02:00 Fluctuations in distribution and patterns of individual range use of northern bottlenose whales. Hooker, Sascha Kate Whitehead, H Gowans, S Baird, RW 2002 https://risweb.st-andrews.ac.uk/portal/en/researchoutput/fluctuations-in-distribution-and-patterns-of-individual-range-use-of-northern-bottlenose-whales(2b7c321c-2a65-427d-9b48-7b8e4eb3241b).html http://www.scopus.com/inward/record.url?scp=0037059626&partnerID=8YFLogxK http://www.int-res.com/articles/meps/225/m225p287.pdf eng eng info:eu-repo/semantics/restrictedAccess Hooker , S K , Whitehead , H , Gowans , S & Baird , RW 2002 , ' Fluctuations in distribution and patterns of individual range use of northern bottlenose whales. ' , Marine Ecology Progress Series , vol. 225 , pp. 287-297 . foraging ecology cetacean submarine canyon movements range territoriality HYPEROODON-AMPULLATUS NOSED WHALE NOVA-SCOTIA ECOLOGY BEHAVIOR EVOLUTION MOVEMENT DOLPHINS article 2002 ftunstandrewcris 2021-12-26T14:13:01Z This study investigated the pattern and scale of distribution, movements and range use of the northern bottlenose whale Hyperoodon ampullatus above a submarine canyon, the Gully, off eastern Canada between 1988 and 1998. Locations and individual identification photographs were collected during encounters with whales. Whales showed a discrete distribution within the canyon associated with water depth (500 to 1500 m) and relatively steep topography. Encounter rate and distribution showed some variation between years. Changes in distribution were observed toward the north or south of the canyon, probably a consequence of changes in prey distribution. Individual whales within the canyon displaced 4 to 5 km over 24 h, with negligible further increase in displacement over time scales up to 20 d (their approximate residency period). Short-term VHF radio-tracking of 5 individuals provided an independent source of movement data, showing displacements of approximately 2 km in 1 h and 5 to 10 km in 1 d. The relative lack of movement observed for these whales supports the hypothesis that the canyon contains a profitable and localized food source. Movements of whales best fit a model of short-term residence within ranges of approximately 25 km(2), although the range size of mature males was smaller than that of females and immature males. Photo-resightings were also used to investigate variation in the positions of individual whales within the Gully, Within years, individuals showed some separation of ranges associated with periods of high whale abundance, but there was no separation between different age-sex classes, Between years, mature males showed consistent spatial orientations relative to each other, suggesting preferred locations possibly related to mating opportunities. Article in Journal/Newspaper hyperoodon ampullatus Northern bottlenose whale University of St Andrews: Research Portal Canada The Gully ENVELOPE(-57.731,-57.731,51.567,51.567) |
institution |
Open Polar |
collection |
University of St Andrews: Research Portal |
op_collection_id |
ftunstandrewcris |
language |
English |
topic |
foraging ecology cetacean submarine canyon movements range territoriality HYPEROODON-AMPULLATUS NOSED WHALE NOVA-SCOTIA ECOLOGY BEHAVIOR EVOLUTION MOVEMENT DOLPHINS |
spellingShingle |
foraging ecology cetacean submarine canyon movements range territoriality HYPEROODON-AMPULLATUS NOSED WHALE NOVA-SCOTIA ECOLOGY BEHAVIOR EVOLUTION MOVEMENT DOLPHINS Hooker, Sascha Kate Whitehead, H Gowans, S Baird, RW Fluctuations in distribution and patterns of individual range use of northern bottlenose whales. |
topic_facet |
foraging ecology cetacean submarine canyon movements range territoriality HYPEROODON-AMPULLATUS NOSED WHALE NOVA-SCOTIA ECOLOGY BEHAVIOR EVOLUTION MOVEMENT DOLPHINS |
description |
This study investigated the pattern and scale of distribution, movements and range use of the northern bottlenose whale Hyperoodon ampullatus above a submarine canyon, the Gully, off eastern Canada between 1988 and 1998. Locations and individual identification photographs were collected during encounters with whales. Whales showed a discrete distribution within the canyon associated with water depth (500 to 1500 m) and relatively steep topography. Encounter rate and distribution showed some variation between years. Changes in distribution were observed toward the north or south of the canyon, probably a consequence of changes in prey distribution. Individual whales within the canyon displaced 4 to 5 km over 24 h, with negligible further increase in displacement over time scales up to 20 d (their approximate residency period). Short-term VHF radio-tracking of 5 individuals provided an independent source of movement data, showing displacements of approximately 2 km in 1 h and 5 to 10 km in 1 d. The relative lack of movement observed for these whales supports the hypothesis that the canyon contains a profitable and localized food source. Movements of whales best fit a model of short-term residence within ranges of approximately 25 km(2), although the range size of mature males was smaller than that of females and immature males. Photo-resightings were also used to investigate variation in the positions of individual whales within the Gully, Within years, individuals showed some separation of ranges associated with periods of high whale abundance, but there was no separation between different age-sex classes, Between years, mature males showed consistent spatial orientations relative to each other, suggesting preferred locations possibly related to mating opportunities. |
format |
Article in Journal/Newspaper |
author |
Hooker, Sascha Kate Whitehead, H Gowans, S Baird, RW |
author_facet |
Hooker, Sascha Kate Whitehead, H Gowans, S Baird, RW |
author_sort |
Hooker, Sascha Kate |
title |
Fluctuations in distribution and patterns of individual range use of northern bottlenose whales. |
title_short |
Fluctuations in distribution and patterns of individual range use of northern bottlenose whales. |
title_full |
Fluctuations in distribution and patterns of individual range use of northern bottlenose whales. |
title_fullStr |
Fluctuations in distribution and patterns of individual range use of northern bottlenose whales. |
title_full_unstemmed |
Fluctuations in distribution and patterns of individual range use of northern bottlenose whales. |
title_sort |
fluctuations in distribution and patterns of individual range use of northern bottlenose whales. |
publishDate |
2002 |
url |
https://risweb.st-andrews.ac.uk/portal/en/researchoutput/fluctuations-in-distribution-and-patterns-of-individual-range-use-of-northern-bottlenose-whales(2b7c321c-2a65-427d-9b48-7b8e4eb3241b).html http://www.scopus.com/inward/record.url?scp=0037059626&partnerID=8YFLogxK http://www.int-res.com/articles/meps/225/m225p287.pdf |
long_lat |
ENVELOPE(-57.731,-57.731,51.567,51.567) |
geographic |
Canada The Gully |
geographic_facet |
Canada The Gully |
genre |
hyperoodon ampullatus Northern bottlenose whale |
genre_facet |
hyperoodon ampullatus Northern bottlenose whale |
op_source |
Hooker , S K , Whitehead , H , Gowans , S & Baird , RW 2002 , ' Fluctuations in distribution and patterns of individual range use of northern bottlenose whales. ' , Marine Ecology Progress Series , vol. 225 , pp. 287-297 . |
op_rights |
info:eu-repo/semantics/restrictedAccess |
_version_ |
1766026779501264896 |