Albatross predation of juvenile southern blue whiting (Micromesistius australis) on the Campbell Plateau
作者:
Yves Cherel,
Sue Waugh,
Stuart Hanchet,
期刊:
New Zealand Journal of Marine and Freshwater Research
(Taylor Available online 1999)
卷期:
Volume 33,
issue 3
页码: 437-441
ISSN:0028-8330
年代: 1999
DOI:10.1080/00288330.1999.9516889
出版商: Taylor & Francis Group
关键词: black‐browed albatross;conservation;feeding ecology;fishery;marine predators;rockhopper penguins;satellite tracking
数据来源: Taylor
摘要:
Dietary samples collected at Campbell Island in summer 1997 indicate that southern blue whiting (Micromesistius australis) formed the bulk of the food of black‐browed albatrosses (Diomedea melanophrys impavida) during the chick‐rearing period. Birds preyed upon a single size class of fish with a mode at 80–90 mm standard length; fish were 4–5 months old and belonged to the 0+ age group. Satellite tracking showed that, when performing trips of short duration, adult albatrosses foraged within the 1000 m depth contour in the subantarctic zone north of Campbell Island. The feeding ecology of albatrosses thus suggests that juvenile (0+) southern blue whiting are pelagic and occur in dense schools in the top 5 m of the water column over the Campbell Plateau during the summer months. The high reliance of birds on juvenile southern blue whiting during the chick‐rearing period has implications for the management of the southern blue whiting fishery and the conservation of black‐browed albatrosses and other marine predators occurring in the New Zealand subantarctic area.
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