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Albatross Populations In Peril: A Population Trajectory For Black-Browed Albatrosses At South Georgia

2006; Wiley; Volume: 16; Issue: 1 Linguagem: Inglês

10.1890/03-5340

1939-5582

Jennifer M. Arnold, Solange Brault, John P. Croxall,

Fish Ecology and Management Studies

Ecological ApplicationsVolume 16, Issue 1 p. 419-432 Regular Article Albatross Populations In Peril: A Population Trajectory For Black-Browed Albatrosses At South Georgia Jennifer M. Arnold, Jennifer M. Arnold Department of Biology, University of Massachusetts, 100 Morrissey Boulevard, Boston, Massachusetts 02125 USA Present address: USGS Patuxent Wildlife Research Center, 12100 Beech Forest Road, Laurel, Maryland 20708 USA. E-mail: [email protected]Search for more papers by this authorSolange Brault, Solange Brault Department of Biology, University of Massachusetts, 100 Morrissey Boulevard, Boston, Massachusetts 02125 USASearch for more papers by this authorJohn P. Croxall, John P. Croxall British Antarctic Survey, Natural Environment Research Council, High Cross, Madingley Road, Cambridge CB3 OET UKSearch for more papers by this author Jennifer M. Arnold, Jennifer M. Arnold Department of Biology, University of Massachusetts, 100 Morrissey Boulevard, Boston, Massachusetts 02125 USA Present address: USGS Patuxent Wildlife Research Center, 12100 Beech Forest Road, Laurel, Maryland 20708 USA. E-mail: [email protected]Search for more papers by this authorSolange Brault, Solange Brault Department of Biology, University of Massachusetts, 100 Morrissey Boulevard, Boston, Massachusetts 02125 USASearch for more papers by this authorJohn P. Croxall, John P. Croxall British Antarctic Survey, Natural Environment Research Council, High Cross, Madingley Road, Cambridge CB3 OET UKSearch for more papers by this author First published: 01 February 2006 https://doi.org/10.1890/03-5340Citations: 48 Corresponding Editor: A. B. Hollowed. Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Abstract Simulation modeling was used to reconstruct Black-browed Albatross (Diomedea melanophris) population trends. Close approximations to observed data were accomplished by annually varying survival rates, reproductive success, and probabilities of returning to breed given success in previous years. The temporal shift in annual values coincided with the start of longline fishing at South Georgia and potential changes in krill abundance. We used 23 years of demographic data from long-term studies of a breeding colony of this species at Bird Island, South Georgia, to validate our model. When we used annual parameter estimates for survival, reproductive success, and probabilities of returning to breed given success in previous years, our model trajectory closely followed the observed changes in breeding population size over time. Population growth rate was below replacement (lambda < 1) in most years and was most sensitive to changes in adult survival. This supports the recent IUCN uplisting of this species from “Vulnerable” to “Endangered.” Comparison of pre-1988 and post-1988 demography (before and after the inception of a longline fishery in the breeding area) reveals a decrease in lambda from 0.963 to 0.910. A life table response experiment (LTRE) showed that this decline in lambda was caused mostly by declines in survival of adults. 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