Journal
AFRICAN JOURNAL OF MARINE SCIENCE
Volume 30, Issue 1, Pages 185-188Publisher
NATL INQUIRY SERVICES CENTRE PTY LTD
DOI: 10.2989/AJMS.2008.30.1.19.469
Keywords
breeding success; climate change; Eudyptes chrysocome; parental condition; rockhopper penguin; sub-Antarctic
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Funding
- National Research Foundation
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For rockhopper penguins Eudyptes chrysocome at Marion Island, there were significant decreases over time in the numbers breeding and breeding success at three monitored colonies from 1985/1986 to 2006/2007, and in mass on arrival for breeding of both males and females from 1994/1995 to 2007/2008. Breeding success decreased by 0.15 chicks pair(-1) y(-1) over 22 years and was significantly correlated with mass on arrival of males and females. Survival of chicks at the guard stage was low in the late 1990s; hatching success decreased in the early 2000s. It is thought that an increasingly poor parental condition caused birds to abandon breeding at a progressively early stage. Parental condition is influenced by feeding opportunities at overwintering grounds, which have probably been altered by global climate.
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