Records of subantarctic fur seals Arctocephalus tropicalis in Australia.

1992 ◽  
Vol 15 (1) ◽  
pp. 135
Author(s):  
N.J. Gales ◽  
D.K. Coughran ◽  
L.F. Queale
Keyword(s):  
Fur Seals ◽  
Subantarctic Fur Seals ◽  
Arctocephalus Tropicalis

NA

Age structure, growth, and demographic parameters in breeding-age female subantarctic fur seals, Arctocephalus tropicalis

2004 ◽  
Vol 82 (7) ◽  
pp. 1043-1050 ◽  
Author(s):  
Willy Dabin ◽  
Gwénaël Beauplet ◽  
Enrique A Crespo ◽  
Christophe Guinet
Keyword(s):  
Age Distribution ◽  
Reproductive Rate ◽  
Reproductive Period ◽  
Demographic Parameters ◽  
Island Population ◽  
Female Population ◽  
Regulatory Processes ◽  
Fur Seals ◽  
Subantarctic Fur Seals ◽  
Arctocephalus Tropicalis

Age distribution was estimated for 108 breeding-age female subantarctic fur seals, Arctocephalus tropicalis (Gray, 1872), sampled during the 1999–2000 breeding season on Amsterdam Island, southern Indian Ocean. The growth features were described and demographic parameters assessed from transversal life tables constructed for this female population. The breeding females had a longer mean body length than was observed for other breeding populations of the same species. These females also showed a later start to reproduction (6 years old), a lower overall age-specific reproductive rate (R6–16 = 48.0%), and a lower survival in older age classes (>13 years). Females reproduced up to a maximum age of 16 years, with none older than 19 years observed in the colony, suggesting an apparent senescence in the population. This consequently reduced the theoretical reproductive period of the females, which has led to a lower number of reproductive outputs per individual (i.e., 3.65 weaned pups per female throughout its reproductive life). Although such differences between islands may be related to genotypic traits, these results are consistent with low food availability and suggest that density-dependent regulatory processes operate on the Amsterdam Island population.

Milking Strategy in Subantarctic Fur Seals Arctocephalus tropicalis Breeding on Amsterdam Island: Evidence from Changes in Milk Composition

2001 ◽  
Vol 74 (4) ◽  
pp. 548-559 ◽  
Author(s):  
Jean‐Yves Georges ◽  
René Groscolas ◽  
Christophe Guinet ◽  
Jean‐Patrice Robin
Keyword(s):  
Milk Composition ◽  
Fur Seals ◽  
Subantarctic Fur Seals ◽  
Arctocephalus Tropicalis

Subantarctic fur seals Arctocephalus tropicalis at Heard Island

Polar Biology ◽  
1989 ◽  
Vol 9 (5) ◽  
pp. 337-339 ◽  
Author(s):  
S. D. Goldsworthy ◽  
P. D. Shaughnessy
Keyword(s):  
Fur Seals ◽  
Heard Island ◽  
Subantarctic Fur Seals ◽  
Arctocephalus Tropicalis

Myeloid and histiocytic sarcomas in subantarctic fur seals Arctocephalus tropicalis, Brazil

2021 ◽  
Author(s):  
L Reisfeld ◽  
NCCA Fernandes ◽  
A Sarmiento ◽  
P Canedo ◽  
F Salvagni ◽  
...  
Keyword(s):  
Fur Seals ◽  
Subantarctic Fur Seals ◽  
Arctocephalus Tropicalis

scholarly journals Characterization of the faecal bacterial community of wild young South American (Arctocephalus australis) and Subantarctic fur seals (Arctocephalus tropicalis)

2016 ◽  
Vol 92 (3) ◽  
pp. fiw029 ◽  
Author(s):  
Aline Weber Medeiros ◽  
Adriana Giongo ◽  
Fernanda P. Valdez ◽  
Derek Blaese de Amorin ◽  
Maurício Tavares ◽  
...  
Keyword(s):  
Bacterial Community ◽  
South American ◽  
Fur Seals ◽  
Subantarctic Fur Seals ◽  
Arctocephalus Tropicalis

Long-term evaluation of pup growth and preweaning survival rates in subantarctic fur seals, Arctocephalus tropicalis, on Amsterdam Island

2003 ◽  
Vol 81 (7) ◽  
pp. 1222-1232 ◽  
Author(s):  
Magaly Chambellant ◽  
Gwénaël Beauplet ◽  
Christophe Guinet ◽  
Jean-Yves Georges
Keyword(s):  
Growth Rate ◽  
Food Availability ◽  
Survival Rates ◽  
Birth Date ◽  
Growth And Survival ◽  
Fur Seals ◽  
Pup Growth ◽  
Sst Gradient ◽  
Subantarctic Fur Seals ◽  
Arctocephalus Tropicalis

This study is the first to investigate pup preweaning growth and survival rates over seven consecutive breeding seasons in subantarctic fur seals, Arctocephalus tropicalis, on Amsterdam Island, southern Indian Ocean. Growth and survival were studied in relation to year and pup sex, birth date, birth mass, and growth rate at 60 days of age. The pup growth rate decreased over the 7-year study period and was the lowest ever found in otariids, which suggests that lactating females experience constant low food availability. Male and female pups grew and survived at similar rates. Pups that were heavier at birth grew faster and exhibited better early survival (i.e., the first 2 months of life) than pups that were lighter at birth. However, no such relationship was detected for late survival (i.e., from 2 months to weaning) in this long-lactating species. No relationship was found between pup growth rate, pup survival rate, and sea-surface temperature (SST) gradient during the study period, especially during the later years of good trophic conditions (i.e., a high SST gradient). Such dissociations suggest that variation in food availability may not be the only factor influencing pup performance until weaning. We therefore propose that the subantarctic fur seal population is reaching its carrying capacity and that a density-dependent effect is occurring on Amsterdam Island.

Skull morphometrics of male Subantarctic fur seals (Arctocephalus tropicalis) from Marion and Gough Islands

2000 ◽  
Vol 35 (2) ◽  
pp. 165-171 ◽  
Author(s):  
Graham I.H. Kerley ◽  
Bryce R. Allen ◽  
Marthán N. Bester
Keyword(s):  
Fur Seals ◽  
Subantarctic Fur Seals ◽  
Arctocephalus Tropicalis

Vagrant Subantarctic fur seals at Bouvetøya

2006 ◽  
Vol 41 (1) ◽  
pp. 145-146 ◽  
Author(s):  
G. J. G. Hofmeyr ◽  
M. N. Bester ◽  
S. P. Kirkman
Keyword(s):  
Fur Seals ◽  
Subantarctic Fur Seals
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