Relationship between long-term environmental fluctuations and diving effort of female Australian fur seals

Hoskins,AJ and Arnould,JPY 2014, Relationship between long-term environmental fluctuations and diving effort of female Australian fur seals, Marine Ecology - Progress Series, vol. 511, pp. 285-295, doi: 10.3354/meps10935.

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Title Relationship between long-term environmental fluctuations and diving effort of female Australian fur seals
Author(s) Hoskins,AJ
Arnould,JPYORCID iD for Arnould,JPY
Journal name Marine Ecology - Progress Series
Volume number 511
Start page 285
End page 295
Total pages 11
Publisher Inter-Research
Place of publication Oldendorf, Germany
Publication date 2014-09-24
ISSN 0171-8630
Keyword(s) Arctocephalus pusillus doriferus
Benthic diving
Diving behavior
El Niño Southern oscillation
Sea-surface temperature
Science & Technology
Life Sciences & Biomedicine
Physical Sciences
Marine & Freshwater Biology
Environmental Sciences & Ecology
El Nino Southern Oscillation
Summary For predators foraging within spatially and temporally heterogeneous marine ecosystems, environmental fluctuations can alter prey availability. Using the proportion of time spent diving and foraging trip duration as proxies of foraging effort, a multi-year dataset was used to assess the response of 58 female Australian fur seals Arctocephalus pusillus doriferus to interannual environmental fluctuations. Multiple environmental indices (remotely sensed ocean colour data and numerical weather predictions) were assessed for their influence on inter-annual variations in the proportion of time spent diving and trip duration. Model averaging revealed strong evidence for relationships between 4 indices and the proportion of time spent diving. There was a positive relationship with effort and 2 yr-lagged spring sea-surface temperature, current winter zonal wind and southern oscillation index, while a negative relationship was found with 2 yr-lagged spring zonal wind. Additionally, a positive relationship was found between foraging trip duration and 1 yr-lagged spring surface chlorophyll a. These results suggest that environmental fluctuations may influence prey availability by affecting the survival and recruitment of prey at the larval and post-larval phases while also affecting current distribution of adult prey.
Language eng
DOI 10.3354/meps10935
Field of Research 060201 Behavioural Ecology
060205 Marine and Estuarine Ecology (incl Marine Ichthyology)
060809 Vertebrate Biology
Socio Economic Objective 970105 Expanding Knowledge in the Environmental Sciences
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2014, Inter-Research
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