eCite Digital Repository

The foraging zones of breeding royal (Eudyptes schlegeli) and rockhopper (E-chrysocome) penguins: an assessment of techniques and species comparison

Citation

Hull, CL, The foraging zones of breeding royal (Eudyptes schlegeli) and rockhopper (E-chrysocome) penguins: an assessment of techniques and species comparison, Wildlife Research, 26, (6) pp. 789-803. ISSN 1035-3712 (1999) [Refereed Article]

DOI: doi:10.1071/WR98028

Abstract

This study used VHF telemetry, time-depth recorders (TDRs) collecting geolocation and sea-surface temperature data, and foraging-trip durations to describe and compare the foraging zones of royal and rockhopper penguins at Macquarie Island. VHF telemetry was unsuccessful, but TDRs were deployed 61 times across the four stages of the breeding season (males during incubation, females during incubation, guard stage and creche stage) during the 1994/95 and 1995/96 austral summers, with 37 providing data for analysis. The errors inherent in geolocation made it impossible to determine precise foraging zones and overlaps between the species. However, sea-surface temperature data and foraging-trip durations provided estimates of foraging zones. Both species foraged in waters of the same temperature (6.8-10.8°C), representing the same regions of the polar frontal zone. It was estimated that rockhopper penguins did not travel as far as royal penguins, providing some degree of segregation in foraging zones. When the data were assessed contemporaneously, to take into account the 3-week asynchrony in the breeding season of the species, the overlap in foraging zones was small.

Item Details

Item Type:Refereed Article
Research Division:Biological Sciences
Research Group:Ecology
Research Field:Marine and Estuarine Ecology (incl. Marine Ichthyology)
Objective Division:Environment
Objective Group:Ecosystem Assessment and Management
Objective Field:Ecosystem Assessment and Management of Antarctic and Sub-Antarctic Environments
Author:Hull, CL (Dr Cindy Hull)
ID Code:16873
Year Published:1999
Web of Science® Times Cited:23
Deposited By:Zoology
Deposited On:1999-08-01
Last Modified:2011-08-05
Downloads:0

Repository Staff Only: item control page