Few estimates of abundance have been made. There are estimated to be 520-530 bottlenose dolphins off KwaZulu-Natal, South Africa, most of which are probably T. aduncus (the rest T. truncatus – Cockcroft et al. 1992). Between 136 and 179 (95% Cis = 124-212) are known off Zanzibar, Tanzania (Stensland et al. 2006); at least 1,200 in the Persian Gulf (Preen 2004); at least 400 photo-identified along the rim of the Swatch-of-No-Ground, Bangladesh (Rubaiyat Mansur Mowgli and Brian D. Smith pers. comm.); about 218 off western Kyushu, Japan (Shirakihara et al. 2002); 169 off Mikura Island, Japan (Kogi et al. 2004); low tens at the southern tip of Taiwan and about 50 from the northeastern Philippines (J. Y. Wang pers. comm.); 1,099 off Queensland, eastern Australia (Chilvers and Corkeron 2003) and at least 2,000-3,000 in Shark Bay western Australia (Preen et al. 1997).
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