This Marine IBA is identified using both tracking data and seaward extensions around breeding colonies. It falls within the Australia Exclusive Economic Zone (EEZ) and the Indian Ocean, Eastern FAO ocean region. The site covers an area of 953 km2 and is 49 km away from the closet coastline. The depth ranges from 0 to 585 m, mean annual sea surface temperature falls between 13.74 and 14.25 °C and mean annual chlorophyll-a concentrations found to range between 0.44 and 1 mg/m3.
4 species trigger IBA criteria at this Marine IBA. BirdLife analyses of tracking data estimates that 19286-46286 individuals of Short-tailed Shearwater (LC) from are present at the site during the Breeding (Nov-Apr) life-history stage. 45-412 individuals of Shy Albatross (NT) from Pedra Branca are present at the site during the Incubation (Sep-Dec) life-history stage. Seaward extensions around breeding colonies; Hippolyte Rocks, Tasman Island include key near-colony areas for breeding populations of Sooty Shearwater (NT) 3000-3000 individuals and Black-faced Cormorant (LC) 1215-1215 individuals.
BirdLife International (2020) Important Bird Areas factsheet: Tasman Island / Hippolyte Rocks - Marine. Downloaded from http://www.birdlife.org on 29/05/2020.