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Australian Humpback Dolphin (Sousa Sahulensis)

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Australian Humpback Dolphin (Sousa Sahulensis) Australian Humpback Dolphin (Sousa sahulensis) Figure 1. Suggested geographical range of Australian humpback dolphins (Sousa sahulensis) and locations where studies have occurred within their range (see also Table 1). THE IUCN RED LIST OF THREATENED SPECIES™ Figure 2. Major Ports (including ports under expansion) and mines located along Australian humpback dolphins (Sousa sahulensis) range. 2 Table 1. Best available estimates for areas in which Sousa chinensis abundance/population size has been assessed (it should be noted that although each of these is assumed to be separate subpopulation for this assessment, in most cases, this has not been confirmed through empirical studies). Study Site Approximate Number of Mature State Population Estimate (95%CI) Reference (~Area km2) Density Individuals* Cleveland Bay (310 34 (24-49) – 54 (38-77) 0.11–0.17 17 - 27 (Parra et al. 2006a) km2) Capricorn coast (980 104 (88-120) – 115 (100-130) 0.11-0.12 52 – 58 (Cagnazzi 2013) km2) Curtis coast (510 45 (30-61) – 84 (73-95) 0.09 - 0.16 23 – 42 (Cagnazzi 2013) km2) Great Sandy Strait 137 (121-154) – 162 (157-167) 0.13 – 0.17 68 – 81 (Cagnazzi et al. 2011) (1000 km2) Northern Great Sandy Strait (560 59 (48-72) – 79 (74-84) 0.11 - 0.14 30 – 40 (Cagnazzi et al. 2011) km2) Southern Great Sandy strait (440 68 (59-78)- 78 (65-94) 0.15 - 0.18 34 – 39 (Cagnazzi et al. 2011) km2) Moreton Bay (1315 119 (81-166)–163 (108-251) 0.09 – 0.12 60 – 82 (Corkeron et al. 1997) km2) QLD Weipa region (1100 (I. Beasley 2015 pers. UA** -- -- km2) comm., 19 February) Princess Charlotte (I. Beasley 2015 pers. UA -- -- Bay (110 km2) comm., 19 February) Hinchinbrook (450 (I. Beasley 2015 pers. UA -- -- km2) comm., 19 February) (I. Beasley 2015 pers. Whitsundays UA -- -- comm., 19 February) (D. Cagnazzi 2015 Shoalwater Bay UA -- -- pers. comm., 19 Military Training Area February) Moreton Bay (1523 (L. Hawkins 2015 pers. UA -- -- km2) comm., 18 February) Cleveland Bay (310 34 (24-49) – 54 (38-77) 0.11–0.17 17 - 27 (Parra et al. 2006a) km2) Capricorn coast 104 (88-120) – 115 (100-130) 0.11-0.12 52 – 58 (Cagnazzi 2013) (980km2) Curtis coast (510 45 (30-61) – 84 (73-95) 0.09 - 0.16 23 – 42 (Cagnazzi 2013) km2) Great Sandy Strait 137 (121-154) – 162 (157-167) 0.13 – 0.17 68 – 81 (Cagnazzi et al. 2011) (1000 km2) Northern Great Sandy Strait (560 59 (48-72) – 79 (74-84) 0.11 - 0.14 30 – 40 (Cagnazzi et al. 2011) km2) Southern Great Sandy strait (440 68 (59-78)- 78 (65-94) 0.15 - 0.18 34 – 39 (Cagnazzi et al. 2011) km2) Bynoe Harbour (460 (Brooks and Pollock 14 (9-19) – 35 (28-42) 0.03 - 0.08 7 – 18 km2) 2014) Darwin Harbour (471 (Brooks and Pollock 37 (29-46)- 49 (39-59) 0.08 - 0.10 19 – 25 km2) 2014) (Brooks and Pollock NT Shoal Bay (154 km2) 15 (10-20) – 26 (17-35) 0.10- 0.16 8 – 13 2014) Port Essington (325 48 (24-95)– 207 (113-379) 0.15 – 0.64 24 – 104 (Palmer et al. 2014a) km2) Melville Bay (105 (I. Beasley 2015 pers. ongoing -- -- km2) comm., 19 February) Cygnet Bay (130 14 (12-25) - 20 (18-29) 0.11 - 0.15 7 - 10 (Brown et al. 2013) km2) Inner Cambridge Gulf UA (< 15 distinctive individuals (A. Brown 2015 pers. (180 km2) photo-identified) comm., 20 June) UA (< 15 distinctive individuals (A. Brown 2015 pers. Cone Bay (100 km2) photo-identified) comm., 20 June) UA (< 15 distinctive individuals (A. Brown 2015 pers. Beagle Bay (130 km2) -- -- WA photo-identified) comm20 June) Roebuck Bay (100 UA (< 15 distinctive individuals (A. Brown 2015 pers. -- -- km2) photo-identified) comm., 20 June) (H. Raudino; 2015 Onslow and Pilbara UA -- -- pers. comm., 5 region February) North West Cape (T. Hunt 2015 pers. UA -- -- (130 km2) comm., 5 February) *Estimated at 50% of the total population size as estimated for Indo-Pacific Humpback Dolphins (S. chinensis) (Taylor et al. 2007). **At the time of writing, the data is undergoing analysis (UA). 4 Table 2. Conservation status of Australian Humpback Dolphins (Sousa sahulensis) while they were still considered to be Indo-Pacific Humpback Dolphins (Sousa chinensis). Listing Status International International Union for the Conservation of Nature (IUCN) Near Threatened Convention on Migratory Species Appendix II Convention on International Trade in Endangered Species (CITES) Appendix I Australia Australian Mammal Action Plan 2012 Data Deficient Environment Protection and Biodiversity Conservation Act 1999 (EPBC Act) Migratory Marine Bioregional Plan Conservation Value Queensland Government (Nature Conservation Act 1992) Near Threatened Northern Territory Government (Northern Territory Threatened Species Data Deficient List) Western Australian Government (Western Australian Wildlife Conservation Protected, Priority 4 1 Act) Australian Action Plan for Cetaceans (Bannister et al. 1996) Insufficiently known - K Review of Conservation of Australia’s Smaller Whales and Dolphins (Ross 2006) Priority Species (Insufficiently known) High priority for Great Barrier Reef Marine Park Authority management THE IUCN RED LIST OF THREATENED SPECIES™ .
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