Dive behaviour, foraging locations and maternal-attendance patterns in Australian fur seals (Arctocephalus pusillus doriferus)
The dive behaviour, foraging locations, and colony-attendance patterns of female Australian fur seals ( Arctocephalus pusillus doriferus ) from Kanowna Island (39°10'S, 146°18'E) in Bass Strait, southeastern Australia, were determined throughout lactation during 1997–1999. Foraging-trip du...
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ftdeakinunifig:oai:figshare.com:article/20577420 2023-05-15T16:05:45+02:00 Dive behaviour, foraging locations and maternal-attendance patterns in Australian fur seals (Arctocephalus pusillus doriferus) John Arnould M Hindell 2001-01-01T00:00:00Z http://hdl.handle.net/10536/DRO/DU:30015951 https://figshare.com/articles/journal_contribution/Dive_behaviour_foraging_locations_and_maternal-attendance_patterns_in_Australian_fur_seals_Arctocephalus_pusillus_doriferus_/20577420 unknown http://hdl.handle.net/10536/DRO/DU:30015951 https://figshare.com/articles/journal_contribution/Dive_behaviour_foraging_locations_and_maternal-attendance_patterns_in_Australian_fur_seals_Arctocephalus_pusillus_doriferus_/20577420 All Rights Reserved Ecology Zoology Southern fur seals behaviour lactation foraging behaviour Science & Technology Life Sciences & Biomedicine NEW-ZEALAND DIVING BEHAVIOR ELEPHANT SEALS FEMALE LIONS TASMANIA FORSTERI CYCLES DIET Text Journal contribution 2001 ftdeakinunifig 2022-11-17T22:57:09Z The dive behaviour, foraging locations, and colony-attendance patterns of female Australian fur seals ( Arctocephalus pusillus doriferus ) from Kanowna Island (39°10'S, 146°18'E) in Bass Strait, southeastern Australia, were determined throughout lactation during 1997–1999. Foraging-trip durations increased as lactation progressed, being shortest in summer (3.71 ± 0.24 days; mean ± 1 SE) and longest in winter (6.77 ± 0.57 days, P < 0.05), but maternal-attendance periods did not differ in duration (1.70 ± 0.10 days, P > 0.5). Individual mean attendance periods and trip durations were positively correlated ( r 2 = 0.21, P < 0.005). Diving commenced shortly after seals left the colony (2.6 ± 0.4 h), was continuous for long periods (up to 36 h), occurred mostly during daylight hours, and lacked regular diel variation in depth. The majority of dives (78%) were typically U-shaped and reached depths corresponding to the prevailing depths in Bass Strait (65–85 m), indicating that these animals forage mostly on the benthos of the shallow continental shelf in this region. Such behaviour is unusual for fur seals but is reminiscent of that of some sea lion species. Mean dive durations varied between 2.0 and 3.7 min (maximum 8.9 min) and the theoretical aerobic dive limit (3.91–4.26 min) was exceeded on 17.3% of dives. Dive frequency (8.3 ± 0.6/h) and the proportion of time at sea spent diving (40.7 ± 2.1%) were weakly negatively related to the duration of the foraging trip ( r 2 = 0.07, P < 0.004, and r 2 = 0.13, P < 0.0001, respectively). Data from at-sea locations showed that lactating females forage almost exclusively within Bass Strait during all seasons. Other Non-Article Part of Journal/Newspaper Elephant Seals Southern Fur Seals DRO - Deakin Research Online New Zealand |
institution |
Open Polar |
collection |
DRO - Deakin Research Online |
op_collection_id |
ftdeakinunifig |
language |
unknown |
topic |
Ecology Zoology Southern fur seals behaviour lactation foraging behaviour Science & Technology Life Sciences & Biomedicine NEW-ZEALAND DIVING BEHAVIOR ELEPHANT SEALS FEMALE LIONS TASMANIA FORSTERI CYCLES DIET |
spellingShingle |
Ecology Zoology Southern fur seals behaviour lactation foraging behaviour Science & Technology Life Sciences & Biomedicine NEW-ZEALAND DIVING BEHAVIOR ELEPHANT SEALS FEMALE LIONS TASMANIA FORSTERI CYCLES DIET John Arnould M Hindell Dive behaviour, foraging locations and maternal-attendance patterns in Australian fur seals (Arctocephalus pusillus doriferus) |
topic_facet |
Ecology Zoology Southern fur seals behaviour lactation foraging behaviour Science & Technology Life Sciences & Biomedicine NEW-ZEALAND DIVING BEHAVIOR ELEPHANT SEALS FEMALE LIONS TASMANIA FORSTERI CYCLES DIET |
description |
The dive behaviour, foraging locations, and colony-attendance patterns of female Australian fur seals ( Arctocephalus pusillus doriferus ) from Kanowna Island (39°10'S, 146°18'E) in Bass Strait, southeastern Australia, were determined throughout lactation during 1997–1999. Foraging-trip durations increased as lactation progressed, being shortest in summer (3.71 ± 0.24 days; mean ± 1 SE) and longest in winter (6.77 ± 0.57 days, P < 0.05), but maternal-attendance periods did not differ in duration (1.70 ± 0.10 days, P > 0.5). Individual mean attendance periods and trip durations were positively correlated ( r 2 = 0.21, P < 0.005). Diving commenced shortly after seals left the colony (2.6 ± 0.4 h), was continuous for long periods (up to 36 h), occurred mostly during daylight hours, and lacked regular diel variation in depth. The majority of dives (78%) were typically U-shaped and reached depths corresponding to the prevailing depths in Bass Strait (65–85 m), indicating that these animals forage mostly on the benthos of the shallow continental shelf in this region. Such behaviour is unusual for fur seals but is reminiscent of that of some sea lion species. Mean dive durations varied between 2.0 and 3.7 min (maximum 8.9 min) and the theoretical aerobic dive limit (3.91–4.26 min) was exceeded on 17.3% of dives. Dive frequency (8.3 ± 0.6/h) and the proportion of time at sea spent diving (40.7 ± 2.1%) were weakly negatively related to the duration of the foraging trip ( r 2 = 0.07, P < 0.004, and r 2 = 0.13, P < 0.0001, respectively). Data from at-sea locations showed that lactating females forage almost exclusively within Bass Strait during all seasons. |
format |
Other Non-Article Part of Journal/Newspaper |
author |
John Arnould M Hindell |
author_facet |
John Arnould M Hindell |
author_sort |
John Arnould |
title |
Dive behaviour, foraging locations and maternal-attendance patterns in Australian fur seals (Arctocephalus pusillus doriferus) |
title_short |
Dive behaviour, foraging locations and maternal-attendance patterns in Australian fur seals (Arctocephalus pusillus doriferus) |
title_full |
Dive behaviour, foraging locations and maternal-attendance patterns in Australian fur seals (Arctocephalus pusillus doriferus) |
title_fullStr |
Dive behaviour, foraging locations and maternal-attendance patterns in Australian fur seals (Arctocephalus pusillus doriferus) |
title_full_unstemmed |
Dive behaviour, foraging locations and maternal-attendance patterns in Australian fur seals (Arctocephalus pusillus doriferus) |
title_sort |
dive behaviour, foraging locations and maternal-attendance patterns in australian fur seals (arctocephalus pusillus doriferus) |
publishDate |
2001 |
url |
http://hdl.handle.net/10536/DRO/DU:30015951 https://figshare.com/articles/journal_contribution/Dive_behaviour_foraging_locations_and_maternal-attendance_patterns_in_Australian_fur_seals_Arctocephalus_pusillus_doriferus_/20577420 |
geographic |
New Zealand |
geographic_facet |
New Zealand |
genre |
Elephant Seals Southern Fur Seals |
genre_facet |
Elephant Seals Southern Fur Seals |
op_relation |
http://hdl.handle.net/10536/DRO/DU:30015951 https://figshare.com/articles/journal_contribution/Dive_behaviour_foraging_locations_and_maternal-attendance_patterns_in_Australian_fur_seals_Arctocephalus_pusillus_doriferus_/20577420 |
op_rights |
All Rights Reserved |
_version_ |
1766401640239202304 |