Figure 1.
Map of the Capricorn Coast study area.
Capital letters indicate survey sections: A = Shoalwater Bay, B = Northern Regions, C = Nine Miles Beach, D = Keppel Bay inshore, E = Keppel Islands, F = Fitzroy outer estuary, G = Fitzroy inner estuary and river, H = Curtis Island East Coast, I = North Port Curtis, J = South Port Curtis. Shoalwater Bay Military Training Area = A+B¸ Keppel Bay = D+E+F+G, Port Curtis = I+J.
Table 1.
Validation of the assumptions involved in Jolly-Seber capture–recapture models used for the estimation of population sizes of snubfin dolphins in Keppel Bay survey area.
Figure 2.
Discovery curve of marked snubfin dolphins.
Discovery curve showing the cumulative number of snubfin dolphins (grey line) identified in relation to hours of survey effort per month (grey bars) in Keppel Bay between 2006 and 2011.
Figure 3.
Limited protection for snubfin dolphins in an increasingly developed environment.
Map of the Keppel Bay survey area showing snubfin records with red circles (A), of the representative range (yellow line) and core areas (red line) in relation to the habitat type (B), to Great Barrier Reef Marine Park zones (C), and to the proposed development (dredging areas, shipping routes, mooring sites, berth and loading areas) in the Fitzroy River estuary (D). Scale bar is located on the bottom right of the figure unless specified in the map.
Table 2.
Habitat use availability analysis for snubfin dolphins using the Manly’s alpha Electivity Score and corresponding p-values.
Table 3.
List of Jolly-Seber models that reached numerical convergence and associated population estimates per sampling period.
Table 4.
Estimates of the potential biological removal (PBR) of Australian snubfin dolphins for the 2006–2011 abundance estimates obtained in the Keppel Bay region for four distinct recovery factors (Fr = 0.1, 0.3, 0.5, 1).
Table 5.
IUCN Red List criteria met by the Fitzroy River snubfin dolphin population and the resulting threat classifications: vulnerable (VU), endangered (EN) or critically endangered (CR) (IUCN, 2001).