The dispersal of regurgitated pumice gizzard-stones by the southern skua at Macquarie Island. Home> Scientific research> Publications> Biology> The dispersal of regurgitated pumice gizzard-stones by the southern skua at Macquarie Island. Summary Authors:Simpson K.G. Published in: 1965 Category 1: Peer-reviewed literature Program area: Biology Simpson K.G. (1965) The dispersal of regurgitated pumice gizzard-stones by the southern skua at Macquarie Island, The Emu 65(2). 119-124; This content was last updated 8 months ago on 24 February 2026.