# Estimates of abundance south of -60° for 6 cetacean species, based on 3 separate circumpolar surveys # Reference: Branch and Butterworth (2001). Estimates of abundance south of 60°S for cetacean species sighted frequently on the 1978/79 to 1997/98 IWC/IDCR-SOWER sighting surveys. Journal of Cetacean Research and Management. 3:251-270. species survey1 survey2 survey3 Blue whale 440 550 1100 Fin whale 2100 2100 5500 Sperm whale 5400 10000 8300 Humpback whale 7100 9200 9300 Killer whale 91000 27000 25000 Southern bottlenose whale NA 72000 54000