dc.contributor.author |
Shabangu, Fannie Welcome
|
|
dc.contributor.author |
Rogers, Tracey L.
|
|
dc.date.accessioned |
2022-10-06T10:26:59Z |
|
dc.date.available |
2022-10-06T10:26:59Z |
|
dc.date.issued |
2021-02 |
|
dc.description |
DATA AVAILABILITY STATEMENT : The full dataset from the Scientific Committee on Antarctic Research cruise is available on the Dryad data repository (https://doi.org/10.5061/dryad.rr4xgxd79). Acoustic data from International Whaling Commission’s Southern Ocean Whale and Ecosystem Research cruises are available upon request from the International Whaling Commission’s offices. |
en_US |
dc.description.abstract |
Two of the Antarctic pack ice seals, Ross, Ommatophoca rossii, and leopard, Hydrurga leptonyx, seals, are extremely difficult
to study via traditional visual survey techniques, yet are ideal for an acoustic survey as they are highly vociferous and
produce an array of underwater sounds during the austral summer. To determine their acoustic occurrence in the Antarctic
pack ice, we use their calls, detected within 680 acoustic recordings made between 1999 and 2009 as part of two multinational
programmes. Siren calls of Ross seals were detected mainly in January, and 9.88 calls per minute from low siren calls was
the highest call rate for this species. High numbers of Ross seal calls were detected close to the ice edge in areas between
0° and 20° E and 60° and 130° E, suggesting these are important summer habitats. Leopard seal calls were detected mainly
in December and January, and December had the highest percentage of calls. Call rate of 11.93 calls per minute from low
double trills was the highest call rate for leopard seals. Leopard seal calls were detected throughout the Southern Ocean with
more calls detected throughout the pack ice. There was little spatio-temporal overlap in call occurrence of Ross and leopard
seals, but both species were more vocally active during the day. Longitude and latitude were the most important predictors
of Ross seal occurrence, and month of the year highly predicted leopard seal occurrence. This is the first study to examine
the circumpolar acoustic occurrence of Ross and leopard seals in the Southern Ocean pack ice. |
en_US |
dc.description.department |
Mammal Research Institute |
en_US |
dc.description.librarian |
am2022 |
en_US |
dc.description.sponsorship |
International Whaling Commission’s Southern Ocean Whale
and Ecosystem Research cruises were conducted by the International
Whaling Commission, and the Scientific Committee on Antarctic
Research cruise was funded by the Antarctic Scientific Advisory Committee
(ASAC 552 and 1140), the Sea World Research and Rescue
Foundation Inc. and the Scott Foundation. |
en_US |
dc.description.uri |
http://link.springer.com/journal/300 |
en_US |
dc.identifier.citation |
Shabangu, F.W., Rogers, T.L. Summer circumpolar acoustic occurrence and call rates of Ross, Ommatophoca rossii, and leopard, Hydrurga leptonyx, seals in the Southern Ocean. Polar Biology 44, 433–450 (2021). https://doi.org/10.1007/s00300-021-02804-9. |
en_US |
dc.identifier.issn |
0722-4060 (print) |
|
dc.identifier.issn |
1432-2056 (online) |
|
dc.identifier.other |
10.1007/s00300-021-02804-9 |
|
dc.identifier.uri |
https://repository.up.ac.za/handle/2263/87566 |
|
dc.language.iso |
en |
en_US |
dc.publisher |
Springer |
en_US |
dc.rights |
© The Author(s) 2021. Open Access. This article is licensed under a Creative Commons Attribution 4.0 International License. |
en_US |
dc.subject |
Antarctic pack ice seals |
en_US |
dc.subject |
Diel calling behaviour |
en_US |
dc.subject |
Animal calls |
en_US |
dc.subject |
Antarctic |
en_US |
dc.subject |
Passive acoustic survey |
en_US |
dc.subject |
Circumpolar occurrence |
en_US |
dc.subject |
Ross seal (Ommatophoca rossii) |
en_US |
dc.subject |
Leopard seal (Hydrurga leptonyx) |
en_US |
dc.title |
Summer circumpolar acoustic occurrence and call rates of Ross, Ommatophoca rossii, and leopard, Hydrurga leptonyx, seals in the Southern Ocean |
en_US |
dc.type |
Article |
en_US |