scholarly journals Magnetic Bays at Macquarie Island

1960 ◽  
Vol 13 (3) ◽  
pp. 470 ◽  
Author(s):  
CS Robertson
Keyword(s):  
Striking Feature ◽  
Macquarie Island ◽  
Antarctic Research

Polar magnetic bays are the most striking feature of magnetic records obtained by the Australian National Antarctic Research Expeditions at Macquarie Island. Negative bays are more numerous than positive bays and have greater amplitudes and durations. As a rule, negative bays commence about magnetic midnight whereas positive bays commence about 5 hr earlier. A daily reversal in direction of the bayproducing currents is indicated and the time at which this reversal takes place appears to vary with the seasons. During magnetically disturbed periods the ratio H bay amplitude to Z bay amplitude increases, indicating a northward movement of the bay-producing currents. At the same time auroras seen from Macquarie Island lie further north in the sky than usual.

Growth From Birth to 20 Days in the Elephant Seal, Mirounga-Leonina, at Macquarie-Island

1987 ◽  
Vol 35 (4) ◽  
pp. 307 ◽  
Author(s):  
GJ Little ◽  
MM Bryden ◽  
A Barnes
Keyword(s):  
Birth Weight ◽  
Elephant Seal ◽  
Lactation Period ◽  
Mirounga Leonina ◽  
Average Birth Weight ◽  
Macquarie Island ◽  
Seal Population ◽  
Antarctic Research ◽  
Breeding Seasons ◽  
Pup Growth

Recent investigations by members of Australian National Antarctic Research Expeditions to Macquarie I. have revealed a decrease in the elephant seal population there of approximately 50% over the last 36 years. Lower birth weights and/or slower growth during the lactation period might explain this decrease. To test this hypothesis, growth of pups was studied from birth to 20 days during the 1984 and 1985 breeding seasons; these results were compared as far as possible with similar results for the 1956 and 1965 seasons. Average birth weight has not changed significantly over the last 20 years; it is suggested that if food supply were a major factor in the reduction of the elephant seal population, then birth weights in 1985 would have been lower than those in 1956. At birth, male pups were 7% (3 kg) heavier than female pups in 1985. Results from previous years suggest that this is probably normal in this seal. The weight of pups near weaning (20 or 21 days old) is shown to be significantly less in 1984 and 1985 than 1965, but this may be explained by differences in methodology. It is concluded that, on the evidence available, the pattern of pup growth on Macquarie I. has not altered significantly with time, but more work is needed to reach a clear conclusion.

Fur seal skull from sealers' quarters at Sandy Bay, Macquarie Island, Southern Ocean

Polar Record ◽  
1991 ◽  
Vol 27 (162) ◽  
pp. 245-248 ◽  
Author(s):  
K. Townrow ◽  
P. D. Shaughnessy
Keyword(s):  
Southern Ocean ◽  
Arctocephalus Gazella ◽  
Archaeological Excavation ◽  
Antarctic Fur Seal ◽  
Macquarie Island ◽  
Fur Seals ◽  
Fur Seal ◽  
Antarctic Research ◽  
The Antarctic ◽  
Specific Identity

AbstractFur seals were exterminated from Macquarie Island about 20 years after discovery of the island in 1810. Their specific identity is unknown. Few fur seals were reported at the island until it was occupied by the Australian National Antarctic Research Expeditions in 1948. Fur seal numbers are now increasing. An archaeological excavation at a sealers' quarters at Sandy Bay in 1988 revealed the fragmented skull of a young Antarctic fur sealArctocephalus gazella1.1 m below the surface in a layer dated in the 1870s and 1880s. This period coincides with the recovery of fur seal populations in the South Atlantic Ocean following earlier harvesting. Elsewhere it has been argued that the Antarctic fur seal is unlikely to have been the original fur seal at Macquarie Island because few individuals of that species are ashore in winter, which is the season when the island was discovered and fur-seal harvesting began. It is concluded that the Sandy Bay skull is from a vagrant animal.

Branding Elephant Seals for life-history studies

Polar Record ◽  
1967 ◽  
Vol 13 (85) ◽  
pp. 447-449 ◽  
Author(s):  
Susan E. Ingham
Keyword(s):  
Ecological Study ◽  
Individual Recognition ◽  
Elephant Seal ◽  
Southern Elephant Seal ◽  
Mirounga Leonina ◽  
Elephant Seals ◽  
Macquarie Island ◽  
Heard Island ◽  
Antarctic Research

In 1949 the Australian National Antarctic Research Expeditions (ANARE) began a long-term ecological study of the Southern Elephant Seal (Mirounga leonina) at HeardIsland. The biologists devised a method of branding seals for individual recognition (Chittleborough and Ealey, 1953) which has been modified only in detail since then (Carrick and Ingham, 1962a). At Heard Island, pups were branded every year until 1953, but the study here came to an end with the closing of the ANARE station in 1955. At Macquarie Island, pups have been branded every year from 1951 to 1965, giving a sample of individuals of known age and known history.

scholarly journals Magnetic Bays at Macquarie Island

1962 ◽  
Vol 15 (2) ◽  
pp. 277 ◽  
Author(s):  
KD Cole
Keyword(s):  
Magnetic Storm ◽  
Macquarie Island ◽  
Antarctic Research

Robertson (1959) has examined a year's (1954) records of magnetic bays in H, 1J.., Z obtained at the Australian National Antarctic Research Expedition's station at Macquarie I. (54�5� S., 15~ E.). Robertson's Table 1 contains 450 bays in H. Of these 152 are positive bays, and 298 negative. These numbers do not include 38 periods (each of greater than 4 hr duration) of overlapping bay activity or in which bay activity is obliterated by a magnetic storm.

Collembola. Loricata. Brachiopoda. Coleoptera. B.A.N.Z. Antarctic Research Expedition 1929-1931 Under the Command of Sir Douglas Mawson.H. Womersley , B. C. Cotton , H. WomersleyCumacea and Nebaliacea. B.A.N.Z. Antartic Research Expedition 1929-1931 Under the Command of Sir Douglas Mawson.H. M. HaleDiptera. Miscellaneous Insecta. Lepidoptera. B.A.N.Z. Antarctic Research Expedition 1929-1931 Under the Command of Sir Douglas Mawson.H. Womersley , N. B. TindalePolychaeta. B.A.N.Z. Antarctic Research Expedition 1929-1931 Under the Command of Sir Douglas Mawson.C. C. A. MonroOpiliones and Araneae. B.A.N.Z. Antarctic Research Expedition 1929-1931 Under the Command of Douglas Mawson.V. V. HickmanCrinoidea. B.A.N.Z. Antarctic Research Expedition 1929-1931 Under the Command of Douglas Mawson.D. Dilwyn JohnEndoprocta. B.A.N.Z. Antarctic Research Expedition 1929-1931 Under the Command of Douglas Mawson.T. Harvey Johnston , L. Madeline AngelNemerteans of Kerguelen and the Southern Ocean. B.A.N.Z. Antartic Research Expedition 1929-1931 Under the Command of Douglas Mawson.J. F. G. WheelerDecapod Crustacea. B.A.N.Z. Antartic Research Expedition 1929-1931 Under the Command of Douglas Mawson.Herbert M. HalePycnogonida. B.A.N.Z. Antartic Research Expedition 1929-1931 Under the Command of Douglas Mawson.Isabella GordonParasitic Nematodes. B.A.N.Z. Antartic Research Expedition 1929-1931 Under the Command of Douglas Mawson.T. Harvey Johnston , Patricia M. MawsonIsopoda-Valvifera. B.A.N.Z. Antartic Research Expedition 1929-1931 Under the Command of Douglas Mawson.Herbert M. HaleSipunculids. The Mollusca of Macquarie Island (Gastropods and Bivalves). B.A.N.Z. Antartic Research Expedition 1929-1931 Under the Command of Douglas Mawson.A. C. Stephen , J. R. Le B. TomlinPlankton of the Australian-Antartic Quadrant. Part I. Net-Plankton Volume Determination. B.A.N.Z. Antartic Research Expedition 1929-1931 Under the Command of Sir Douglas Mawson.Keith Sheard

1951 ◽  
Vol 26 (1) ◽  
pp. 71-72
Author(s):  
L. H. Hyman
Keyword(s):  
Southern Ocean ◽  
Volume Determination ◽  
Macquarie Island ◽  
Antarctic Research

Parasitic Nematoda collected by the Australian National Antarctic Research Expedition: Heard Island and Macquarie Island, 1948–1951

Parasitology ◽  
1953 ◽  
Vol 43 (3-4) ◽  
pp. 291-297 ◽  
Author(s):  
Patricia M. Mawson
Keyword(s):  
Macquarie Island ◽  
Heard Island ◽  
Antarctic Research

The nematodes described here were collected by biologists of the Australian National Antarctic Research Expedition based at the subantarctic stations at Macquarie Island and Heard Island, over the years 1948–51.

scholarly journals Keith David Cole 1929–2010

2014 ◽  
Vol 25 (1) ◽  
pp. 71 ◽  
Author(s):  
Peter L. Dyson ◽  
David J. Cole
Keyword(s):  
High School ◽  
Space Physics ◽  
Space Environment ◽  
Limited Data ◽  
Physical Processes ◽  
Leadership Positions ◽  
Macquarie Island ◽  
The Earth ◽  
Antarctic Research ◽  
And Mathematics

Keith Cole grew up in Cairns, attended the local high school, and became the first in his family to attend university. Trained in physics and mathematics, he taught in secondary schools before joining the 1956 Australian National Antarctic Research Expedition to Macquarie Island as Auroral Physicist. This was the start of his lifelong career in space physics, exploring primarily the space environment of the Earth. He had a remarkable ability to identify the important physical processes underlying many phenomena, often when only limited data or observations were available. Thus early in his career he correctly explained several puzzling phenomena, particularly in the ionosphere and thermosphere, and quickly established himself as a leader in space physics, a position he maintained throughout his career. He also made very significant contributions as an educator (he was a Foundation Professor of Physics at La Trobe University) and through leadership positions in national and international science organizations.

Australian National Antarctic Research Expedition, 1948–50

Polar Record ◽  
1951 ◽  
Vol 6 (41) ◽  
pp. 80-84 ◽  
Author(s):  
Phillip G. Law
Keyword(s):  
Continuous Operation ◽  
Recent Issue ◽  
Macquarie Island ◽  
Heard Island ◽  
Antarctic Research

In a recent issue of the Polar Record an account was given of the establishment by the Australian National Antarctic Research Expedition of research stations at Heard Island and Macquarie Island. These stations have now been in continuous operation for nearly three years, and the purpose of the following account is to summarize the progress made during this period.

Sign in / Sign up

Export Citation Format

Share Document