scholarly journals Antarctic fur seals foraging in the Polar Frontal Zone: inter-annual shifts in diet as shown from fecal and fatty acid analyses

2002 ◽  
Vol 245 ◽  
pp. 281-297 ◽  
Author(s):  
MA Lea ◽  
Y Cherel ◽  
C Guinet ◽  
PD Nichols
Keyword(s):  
Fatty Acid ◽  
Frontal Zone ◽  
Polar Frontal Zone ◽  
Fur Seals ◽  
Antarctic Fur Seals

Milk fatty acid signatures indicate both major and minor shifts in the diet of lactating Antarctic fur seals

1997 ◽  
Vol 75 (2) ◽  
pp. 188-197 ◽  
Author(s):  
S. J. Iverson ◽  
J. P. Y. Arnould ◽  
I. L. Boyd
Keyword(s):  
Fatty Acids ◽  
Fatty Acid ◽  
Foraging Ecology ◽  
Perinatal Period ◽  
Signature Analysis ◽  
Milk Fatty Acids ◽  
Fatty Acid Signature ◽  
Dietary History ◽  
Fur Seals ◽  
Antarctic Fur Seals

Fatty acid signature analysis is based on the principle that unique arrays of fatty acids within groups of organisms can be transferred, largely unaltered, up the marine food chain and thus may be an indicator of diet composition. We applied fatty acid signature analysis to milks collected from Antarctic fur seals (Arctocephalus gazella) at South Georgia in 1990–1991, during the perinatal period (N = 19) and subsequently during early (N = 11), mid (N = 11), and late (N = 8) foraging trips. In lactating otariid females, milk fatty acids secreted during the perinatal fast are derived largely from blubber mobilization and thus are influenced by dietary history prior to parturition. Conversely, milk fatty acids secreted during foraging trips are derived primarily from immediate dietary intake. The fatty acid signature of perinatal milks was significantly different from that of all other milks, suggesting differences in the prepartum diet when females are away from the breeding grounds. At the onset of foraging periods, the fatty acid composition of milks' changed dramatically to reflect a diet composed mainly of krill. However, during late foraging periods, milk fatty acids again changed from those of early and mid foraging, and suggested a predominance of teleost fish in the diet. These findings were consistent with independent assessments of diet by faecal analysis and indicate the potential value of fatty acid signature analysis in studying foraging ecology in free-ranging pinnipeds.

Fur seals, whales and tourists: a commercial history of Deception Island, Antarctica

Polar Record ◽  
2009 ◽  
Vol 46 (3) ◽  
pp. 210-221 ◽  
Author(s):  
J. Stephen Dibbern
Keyword(s):  
South Shetland Islands ◽  
Deception Island ◽  
Commercial Activity ◽  
Early 19Th Century ◽  
Cruise Industry ◽  
Shetland Islands ◽  
Fur Seals ◽  
History Of ◽  
The Antarctic ◽  
Antarctic Fur Seals

ABSTRACTDeception Island in the South Shetland Islands was the site of some of the earliest commercial activity to be carried out in the Antarctic with the early 19th century hunting of Antarctic fur seals. Nearly a century later it was the site of the most extensive anchorage for the reconstructed ships and ocean liners used as non-pelagic whale processing factories. Deception was also the site of what is the only successful land based commercial activity in Antarctic history. The Hektor whaling station operated in Whalers Bay from 1912 until 1931. Most of the remains of the station have now been obliterated by the volcanic activity that occurred in the late 1960s and 1970. By the later part of the twentieth century Deception Island had become a regular stop for the growing Antarctic tourist cruise industry. No other place in Antarctica has been so thoroughly identified with commercial activity.

The influence of diet on foraging habitat models: a case study using nursing Antarctic fur seals

Ecography ◽  
2010 ◽  
Vol 33 (4) ◽  
pp. 748-759 ◽  
Author(s):  
Ruth M. Casper ◽  
Michael D. Sumner ◽  
Mark A. Hindell ◽  
Nicholas J. Gales ◽  
Iain J. Staniland ◽  
...  
Keyword(s):  
Foraging Habitat ◽  
Habitat Models ◽  
Fur Seals ◽  
Antarctic Fur Seals

Spatial structure of the southern polar frontal zone of the Atlantic Ocean

2000 ◽  
Vol 11 (1) ◽  
pp. 65-78
Author(s):  
N. P. Bulgakov ◽  
R. A. Yaroshenya ◽  
E. A. Skripaleva ◽  
L. A. Voskresenskaya
Keyword(s):  
Atlantic Ocean ◽  
Spatial Structure ◽  
Frontal Zone ◽  
Polar Frontal Zone
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