Document ID: chunk:federal_register_of_legislation:F2022L00775:reg:18:p35
Version: federal_register_of_legislation:F2022L00775
Segment Type: reg
Provision Reference: reg 18 (pt 35/152)
Character Range: 137226–140228

extirpations have occurred following the introduction of other invasive predators to breeding islands, including rats and stoats in Dusky Sound, Fiordland, cats (Felis catus) on Herekopare Island and Weka (Gallirallus australis) on Jacky Lee Island (Miskelly 2013). Severe weather events also pose a threat. A severe storm in 2010 caused considerable mortality on breeding islands around Stewart Island, New Zealand (Miskelly 2013), and predicted increases in the frequency and intensity of storms may impact part of the population sufficiently to impact the global abundance of the species.

  Recommended Management Actions
        Work with range states to control, or eradicate invasive species on breeding islands

64 Wildlife Conservation Plan for Seabirds
Species profiles

 Salvin's Prion (Pachyptila salvini)

 Life History and Distribution
Salvin's Prion (Pachyptila salvini) is a medium sized prion of the Indian Ocean. The species is very similar to Antarctic Prion (P. desolata) in shape, size, appearance and habits making the two species difficult to separate at sea. The species has an extremely large range which extends from South Africa to Australian and New Zealand. This species normally occurs offshore and can be found in areas of upwelling outside the breeding season. The species breeds on the Prince Edwards Islands (South Africa), Crozet Islands, Amsterdam Islands and St Paul Island (French Southern Territories). Breeding starts in October in huge colonies up to and above one million individuals. It nests in burrows, usually on islands, inland on highland plateau or on slopes with grass or shrubs. It can also be found in caves or crevices (del Hoyo et al. 1992). Its diet is comprised mostly of crustaceans, especially krill, but also fish and squid, all of which it catches either by hydroplaning, surface-seizing or filtering.

 Population Estimates and Trends
Brooke (2004) estimated the global population to exceed 12 million individuals. The population is suspected to be stable in the absence of evidence from any decreases or substantial threats.

 Conservation Concerns and Actions
Black Rats (Rattus rattus) have had a considerable impact on colonies in the past, causing them to shift to locations above the tree-line, and are likely to still be causing decreases within the very large breeding colonies. Cats also have some effect and are present on Cochons Island but are too large to enter burrows although it is thought that predation of adults occurs along with that of near-fledged chicks (del Hoyo et al. 2019).

 Recommended Management Actions
          Gain an improved understanding of the at sea distribution in the Southern Ocean

       Work with range states to control, or eradicate invasive species on breeding islands

Wildlife Conservation Plan for Seabirds 65
Species profiles

Antarctic Prion (Pachyptila desolata)

  Life History and Distribution
The Antarctic Prion (Pachyptila desolata) is an