Title:

Making sense of censuses and dealing with missing data: trends in pup counts of Cape fur seal Arctocephalus pusillus pusillus for the period 1972–2004

Publication Year:
2007
Abstract:

Trends in the population of Cape fur seals Arctocephalus pusillus pusillus were estimated from counts of pups on aerial photographs of colonies taken between 1972 and 2004 to determine trends in the overall population and subpopulations. Incomplete coverage resulted in missing data in some years. Various methods of determining proxy values for missing data were assessed, and it was concluded that different methods were applicable to Namibian and South African colonies. Keywords: Cape fur seal, census, missing data, Namibia, pup numbers, South Africa, trends.

Publication Title:

African Journal of Marine Science

Volume:
29
Issue:
2
Pages:
161–176
Item Type:
Journal Article
Language:
en
Files:
Attachment Size
Kirkman et al 2007 aerial census seals.pdf 276.92 KB

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