Title Population trends of female elephant seals breeding on the Courbet Peninsula, Iles Kerguelen
Author Authier, M.; Delord, K.; Guinet, C.
Author Affil Authier, M., Centre d'Etudes Biologiques de Chize, Villiers en Bois, France
Source Polar Biology, 34(3), p.319-328. Publisher: Springer-Verlag, Berlin, Germany. ISSN: 0722-4060
Publication Date Mar. 2011
Notes In English. Supplemental information/data is available in the online version of this article; includes appendix. 34 refs. GeoRef Acc. No: 309642
Index Terms Indian Ocean Islands--Kerguelen Islands; biogeography; Carnivora; Chordata; ecology; Eutheria; Indian Ocean Islands; Kerguelen Islands; Mammalia; Pinnipedia; populations; reproduction; subantarctic regions; Tetrapoda; Theria; Vertebrata
Abstract Southern Elephant Seals are upper marine predators of the Southern Ocean. As such, their population dynamics and fluctuations reflect environment conditions. Their worldwide populations crashed during the second half of the twentieth century for reasons not yet completely elucidated. Here, we studied the largest population of Southern Elephant Seals within the South Indian Ocean that are breeding on Iles Kerguelen. In a previous analysis, Guinet et al. in Antarct Sci 11:193-197, 1999) suggested that the decline on Iles Kerguelen might be over, as observed elsewhere. Using 10 years of additional data, we updated this analysis using state-of-the-art statistical methods to account for most uncertainties associated with count data. We showed that the population of female Southern Elephant Seals breeding on Iles Kerguelen has been stable over the past 20 years. Despite concomitant global changes within the Southern Ocean, we did not find any evidence of a phenological shift in peak haul-out date of breeding females between the 1970s and the 2000s.
URL http://hdl.handle.net/10.1007/s00300-010-0881-1
Publication Type journal article
Record ID 91406