A large increase in the number of Silver Gulls around Tasmania in the last thirty years has resulted in problems of motor and air traffic hazards. Discouraging breeding has been inadequate. Removal of eggs has been successful in reducing the problem at one site. Culling using alpha-chloralose baits, has provided an immediate but not long-term […]
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Showing 12 of 1617 documents
Showing 12 of 1617 documents
OBSERVATION OF BURROW COVERING ACTIVITY BY A WEDGE-TAILED SHEARWATER
Posted: 08/09/2021INCREASED NUMBERS OF ADELIE PENGUINS Pygoscelis adeliae BREEDING NEAR CASEY, WILKES LAND, EAST ANTARCTICA
Posted: 08/09/2021Fourteen colonies of Adelie Penguins at Whitney Point, near Casey Station, Wilkes Land, which had been censused between 1959/60 and 1961/62, were censused again during late 1983. Of the 14 colonies, 13 were still recognizable, and all had increased in size. One very small colony, which had originally comprised two pairs, was no longer extant. […]
Read MoreThe Seas Around Us: No. 2 – THE LEEUWIN CURRENT
Posted: 08/09/2021The Leeuwin Current is an unexpected current because it carries water from the tropics to southwestern Australia and then eastward, possibly as far as Tasmania. In some places and at some times it has speeds up to 3.5 knots, thereby rivalling the East Australian Current. This paper outlines some of its features.
Read MoreAustralasian Bird Reviews: No. 2 – THE BREEDING SEABIRDS OF SOUTHWESTERN AUSTRALIA: TRENDS IN SPECIES, POPULATIONS AND COLONIES
Posted: 08/09/2021Australia has the only continental west coast with a poleward flowing warm, low salinity boundary current. This water mass, the Leeuwin Current, masks the deeper, equatorward, cold water, Westralian Current along the continental slope for much of the year, although it flows strongly only from about April to August. In southwestern Australia, apparently as a […]
Read MoreEditorial: Volume 14 – Issue 4
Posted: 08/09/2021THE STATUS OF SOUTHERN GIANT PETRELS Macronectes giganteus AT THE FRAZIER ISLANDS, WILKES LAND, EAST ANTARCTICA
Posted: 08/09/2021Censuses of the Southern Giant Petrel colonies on the Frazier Islands, Wilkes Land, recorded 140 nests on the three islands in November 1983 and an estimated 174 in December 1989. The population declined from approximately 200 nests in the mid 1950s to only 53 chicks in 1982/83, but an increased number of nests and chicks […]
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