dc.contributor.upauthor |
Nevoux, Marie
|
|
dc.contributor.upauthor |
De Bruyn, P.J. Nico
|
|
dc.contributor.upauthor |
Wege, Mia
|
|
dc.date.accessioned |
2015-07-17T10:53:03Z |
|
dc.date.available |
2015-07-17T10:53:03Z |
|
dc.date.issued |
2015-06 |
|
dc.description.abstract |
Observer-based studies often underestimate key ecological parameters. Here a fresh approach
was used to analyse six years (2006–11) of attendance cycles to estimate foraging trip lengths of a
lactating flipper-tagged otariid: subantarctic fur seals at Marion Island. Multi-state mark-recapture
models were used to calculate detection failures of females, correct estimates accordingly, and investigate
the effects of year, season, pup sex and the presence of a telemetry device on attendance cycle parameters.
There were no differences between corrected and uncorrected attendance data. This is attributed to the
high capture probability across all seasons (range: 83–98%). This illustrates that observer-based studies
are useful to augment telemetry studies. Only season and pup sex had a significant impact on female
provisioning rates. In winter, foraging trip durations were longer (t-value = 25.22, P <0.0001) and
attendance durations shorter (t-value = -2.15, P = 0.01) than during summer. Females with female pups
spent a higher proportion of their time on land (χ2 = 6.6, P < 0.05). Male pups have higher growth
demands and are larger which suggests they can deplete female milk-stores faster. |
en_ZA |
dc.description.embargo |
2015-12-31 |
en_ZA |
dc.description.librarian |
hb2015 |
en_ZA |
dc.description.sponsorship |
Department of Science and Technology,through the National Research Foundation (NRF),
in support of the Marion Island Marine Mammal Programme (MIMMP) of the MRI. |
en_ZA |
dc.description.uri |
http://journals.cambridge.org/action/displayJournal?jid=ANS |
en_ZA |
dc.identifier.citation |
Wege, M, Nevoux, M, De Bruyn, PJN & Bester, MN 2015, 'Multi-state mark-recapture models as a novel approach to estimate factors affecting attendance patterns of lactating subantarctic fur seals from Marion Island', Antarctic Science, vol. 27, no. 3, pp. 251-261. |
en_ZA |
dc.identifier.issn |
0954-1020 (print) |
|
dc.identifier.issn |
1365-2079 (online) |
|
dc.identifier.other |
10.1017/S0954102014000716 |
|
dc.identifier.uri |
http://hdl.handle.net/2263/49101 |
|
dc.language.iso |
en |
en_ZA |
dc.publisher |
Cambridge University Press |
en_ZA |
dc.rights |
© Antarctic Science Ltd 2014 |
en_ZA |
dc.subject |
Arctocephalus tropicalis |
en_ZA |
dc.subject |
Detection probability |
en_ZA |
dc.subject |
Pup sex |
en_ZA |
dc.subject |
Seasonal effects |
en_ZA |
dc.subject |
Transition probability |
en_ZA |
dc.title |
Multi-state mark-recapture models as a novel approach to estimate factors affecting attendance patterns of lactating subantarctic fur seals from Marion Island |
en_ZA |
dc.type |
Postprint Article |
en_ZA |