Aquatic Environment and Biodiversity Annual Review 2012

3.5. Indicators and trends
AEBAR 2012: Protected species: Sea lions
Population size • 12 065 animals (including pups < 1 yr old) at the Auckland Islands (90% CI:
11 160–13 061) in 2009 (most recent model estimate) 10
• 1 683 pups at the Auckland Islands (SE = 16) in 2011/12 11
• 681–726 pups at Campbell Island in 2010 12
• 25 pups tagged at Stewart Island during a DOC recreational hut and track
maintance trip in March 2012
• 5 pups at the Otago Peninsula in 2011/12 13
Population trend • Estimated abundance at the Auckland Islands:
• Pup production at the Auckland Islands:
• The population is probably increasing at Campbell Island based on substantial
increases in pup counts (although methodology has changed over time).
• The population is increasing at the Otago Peninsula through a combination of
reproduction and immigration.
10 Breen et al. (2010).
11 Chilvers (2012).
12 Robertson and Chilvers (2011), Maloney et al. (2012).
13 For more information, see: http://www.sealiontrust.org.nz/otago-sea-lion-family-tree/.
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