eCite Digital Repository

Environmental influences on foraging effort, success and efficiency in female Australian fur seals

Citation

Speakman, CN and Hoskins, AJ and Hindell, MA and Costa, DP and Hartog, JR and Hobday, AJ and Arnould, JPY, Environmental influences on foraging effort, success and efficiency in female Australian fur seals, Scientific Reports, 10, (1) Article 17710. ISSN 2045-2322 (2020) [Refereed Article]


Preview
PDF
Pending copyright assessment - Request a copy
3Mb
  

DOI: doi:10.1038/s41598-020-73579-y

Abstract

Understanding the factors which influence foraging behaviour and success in marine mammals is crucial to predicting how their populations may respond to environmental change. The Australian fur seal (Arctocephalus pusillus doriferus, AUFS) is a predominantly benthic forager on the shallow continental shelf of Bass Strait, and represents the greatest biomass of marine predators in south-eastern Australia. The south-east Australian region is experiencing rapid oceanic warming, predicted to lead to substantial alterations in prey diversity, distribution and abundance. In the present study, foraging effort and indices of foraging success and efficiency were investigated in 138 adult female AUFS (970 foraging trips) during the winters of 19982019. Large scale climate conditions had a strong influence on foraging effort, foraging success and efficiency. Foraging effort and foraging success were also strongly influenced by winter chlorophyll-a concentrations and sea-surface height anomalies in Bass Strait. The results suggest increasing foraging effort and decreasing foraging success and efficiency under anticipated environmental conditions, which may have population-level impacts.

Item Details

Item Type:Refereed Article
Keywords:fur seal, foraging
Research Division:Biological Sciences
Research Group:Ecology
Research Field:Behavioural ecology
Objective Division:Environmental Management
Objective Group:Coastal and estuarine systems and management
Objective Field:Assessment and management of coastal and estuarine ecosystems
UTAS Author:Hindell, MA (Professor Mark Hindell)
ID Code:142912
Year Published:2020
Deposited By:Ecology and Biodiversity
Deposited On:2021-02-16
Last Modified:2021-02-16
Downloads:0

Repository Staff Only: item control page