eCite Digital Repository

Diving behaviour of the shy albatross Diomedea cauta in Tasmania: initial findings and dive recorder assessment

Citation

Hedd, A and Gales, RP and Brothers, N and Robertson, N, Diving behaviour of the shy albatross Diomedea cauta in Tasmania: initial findings and dive recorder assessment, Ibis: the international journal of avian science, 139, (3) pp. 452-460. ISSN 0019-1019 (1997) [Refereed Article]

DOI: doi:10.1111/j.1474-919X.1997.tb04658.x

Abstract

The diving behaviour of the Shy Albatross Diomedea cauta was investigated using archival time-depth recorders (TDRs) and maximum depth gauges (MDGs). Data from birds carrying multiple devices and from diving simulations indicated that the degree of correspondence between TDRs and MDGs varied with the dive depth, duration and frequency, as well as with body placement. The MDGs were the most reliable when the diving depth was greater than 0.5 m, when the diving frequency was low and when gauges were placed on the birds' backs. The TDRs were used during late incubation and early chick rearing in 1994. Fifty-two dives (≤0.4 m) were recorded during 20 foraging trips of 15 individuals. The majority of dives were within the upper 3 m of the water column and lasted for less than 6 s. However, dives to 7.4 m and others lasting 19 s were recorded. The albatrosses dived between 07.00 h and 22.00 h, with peaks in their diving activity near midday and twilight. Mean diving depth varied throughout the day, with the deepest dives occurring between 10.00 h and 12.00 h. Two dive types were identified on the basis of the relationship between dive depth and descent rate. Plunge dives were short (≤5 s), and the birds reached a maximum depth of 2.9 m. Swimming dives were both longer and deeper. The characteristics of Shy Albatross plunge dives were similar to those of gannets Morus spp., which are known to be proficient plunge divers. Swimming dives suggest that Shy Albatrosses actively pursue prey underwater.

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 Marine Environments
Author:Hedd, A (Ms April Hedd)
ID Code:11816
Year Published:1997
Web of Science® Times Cited:29
Deposited By:Zoology
Deposited On:1997-08-01
Last Modified:2011-08-12
Downloads:0

Repository Staff Only: item control page