Influence of environmental variation on spatial distribution and habitat-use in a benthic foraging marine predator
| Autor: | Jason R. Hartog, Cassie N. Speakman, Alistair J. Hobday, Mark A. Hindell, Daniel P. Costa, Andrew J. Hoskins, John P. Y. Arnould |
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| Rok vydání: | 2021 |
| Předmět: |
0106 biological sciences
Science Foraging Ecology Conservation and Global Change Biology Indian Ocean Dipole (IOD) Spatial distribution 010603 evolutionary biology 01 natural sciences Arctocephalus central-place foraging (CPF) marine predator 14. Life underwater Research Articles otariid Multidisciplinary biology Ecology 010604 marine biology & hydrobiology Pelagic zone biology.organism_classification El Niño Southern Oscillation (ENSO) Habitat 13. Climate action Benthic zone Environmental science Indian Ocean Dipole Fur seal |
| Zdroj: | Royal Society Open Science Royal Society Open Science, Vol 8, Iss 10 (2021) |
| ISSN: | 2054-5703 |
| Popis: | The highly dynamic nature of the marine environment can have a substantial influence on the foraging behaviour and spatial distribution of marine predators, particularly in pelagic marine systems. However, knowledge of the susceptibility of benthic marine predators to environmental variability is limited. This study investigated the influence of local-scale environmental conditions and large-scale climate indices on the spatial distribution and habitat use in the benthic foraging Australian fur seal (Arctocephalus pusillus doriferus; AUFS). Female AUFS provisioning pups were instrumented with GPS or ARGOS platform terminal transmitter tags during the austral winters of 2001–2019 at Kanowna Island, south-eastern Australia. Individuals were most susceptible to changes in the Southern Oscillation Index that measures the strength of the El Niño Southern Oscillation, with larger foraging ranges, greater distances travelled and more dispersed movement associated with 1-yr lagged La Niña-like conditions. Additionally, the total distance travelled was negatively correlated with the current year sea surface temperature and 1-yr lagged Indian Ocean Dipole, and positively correlated with 1-yr lagged chlorophyll-aconcentration. These results suggest that environmental variation may influence the spatial distribution and availability of prey, even within benthic marine systems. |
| Databáze: | OpenAIRE |
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