scholarly journals Foraging behaviour of South American fur seals Arctocephalus australis: extracting fine scale foraging behaviour from satellite tracks

2003 ◽  
Vol 260 ◽  
pp. 285-296 ◽  
Author(s):  
D Thompson ◽  
SEW Moss ◽  
P Lovell
Keyword(s):  
Foraging Behaviour ◽  
South American ◽  
Fine Scale ◽  
Fur Seals

Geographic variation in the foraging behaviour of South American fur seals

2018 ◽  
Vol 596 ◽  
pp. 233-245 ◽  
Author(s):  
AMM Baylis ◽  
M Tierney ◽  
RA Orben ◽  
IJ Staniland ◽  
P Brickle
Keyword(s):  
Geographic Variation ◽  
Foraging Behaviour ◽  
South American ◽  
Fur Seals

Influence of intrinsic variation on foraging behaviour of adult female Australian fur seals

2015 ◽  
Vol 526 ◽  
pp. 227-239 ◽  
Author(s):  
AJ Hoskins ◽  
DP Costa ◽  
KE Wheatley ◽  
JR Gibbens ◽  
JPY Arnould
Keyword(s):  
Adult Female ◽  
Foraging Behaviour ◽  
Fur Seals

Otolith chemistry is more accurate than otolith shape in identifying cod species (genus Pseudophycis) in the diet of Australian fur seals (Arctocephalus pusillus doriferus)

2011 ◽  
Vol 68 (10) ◽  
pp. 1732-1743 ◽  
Author(s):  
Jodie Kemp ◽  
Stephen E. Swearer ◽  
Gregory P. Jenkins ◽  
Simon Robertson
Keyword(s):  
Fourier Analysis ◽  
Significant Variation ◽  
Prey Species ◽  
Fine Scale ◽  
Accurate Identification ◽  
Fish Prey ◽  
Otolith Shape ◽  
Discriminant Model ◽  
Fur Seals ◽  
Otolith Core

Fine-scale shape variation and the added effect of partial digestion often limits accurate identification of different teleost prey species in marine diet studies using otoliths. We evaluated the use of fine-scale shape and trace element variation in digested otoliths to identify fish prey species from the diet of predators. Fourier analysis of otolith shape revealed significant variation between red cod ( Pseudophycis bachus ) and bearded rock cod ( Pseudophycis barbata ) otoliths. Incorporating otoliths that had been consumed by Australian fur seals ( Arctocephalus pusillus doriferus ) into a Fourier analysis discriminant model identified 73% of otoliths as those of red cod and 27% as those of bearded rock cod. However, in vitro digestion of red cod and bearded rock cod otoliths resulted in incorrect classification of both cod species otoliths to varying degrees when using Fourier analysis shape descriptors. There was significant variation between red cod and bearded rock cod otolith core chemistry. Incorporating otoliths consumed by the seals into an otolith core chemistry discriminant model identified all otoliths as those of red cod. Using otolith core chemistry to identify prey species was found to be successful, and there is great potential for this technique to have wider applications in investigating ecosystem trophic interactions.

scholarly journals Variation in fine-scale genetic structure and local dispersal patterns between peripheral populations of a South American passerine bird

2017 ◽  
Vol 7 (20) ◽  
pp. 8363-8378 ◽  
Author(s):  
Esteban Botero-Delgadillo ◽  
Verónica Quirici ◽  
Yanina Poblete ◽  
Élfego Cuevas ◽  
Sylvia Kuhn ◽  
...  
Keyword(s):  
Genetic Structure ◽  
Passerine Bird ◽  
Peripheral Populations ◽  
South American ◽  
Fine Scale ◽  
Dispersal Patterns ◽  
Local Dispersal

Segregation of diets by sex and individual in South American fur seals

2021 ◽  
Author(s):  
Renan C. de Lima ◽  
Valentina Franco-Trecu ◽  
Thayara S. Carrasco ◽  
Pablo Inchausti ◽  
Eduardo R. Secchi ◽  
...  
Keyword(s):  
South American ◽  
Fur Seals

Oceanographic factors influencing the distribution of South American fur seal, Arctocephalus australis around the Falkland Islands before the breeding season

2009 ◽  
Vol 89 (8) ◽  
pp. 1597-1600 ◽  
Author(s):  
Vladimir Laptikhovsky
Keyword(s):  
Prey Species ◽  
Falkland Islands ◽  
South American ◽  
Important Food ◽  
Factors Influencing ◽  
South West ◽  
Fur Seals ◽  
Fur Seal ◽  
Important Food Source ◽  
Productive Zone

Distribution of fur seals Arctocephalus australis has been studied in October 2007 on the western, southern and eastern Falkland shelves during the survey of spawning grounds of the red cod, Salilota australis. Fur seals presence/absence, numbers and sex were recorded at every oceanographic station. Animals were found foraging on the shelf edge south-west of the islands, in a productive zone with quasi-stationary eddies at a periphery of upwelling. It was also the zone of maximum abundance of lobster-krill, Munida spp.—an important food source of fur seals and aggregations of both red cod and blue whiting, Micromesistius australis. No fur seals were found in waters of the relative cold and saline Falkland Current as well as in the relatively warm, fresh and oxygen-rich waters of Argentine Drift. It allows supposing that position and extension of the foraging grounds are caused by oceanographic features determining distribution of prey species.

Parasitism Elicits a Stress Response That Allocates Resources for Immune Function in South American Fur Seals (Arctocephalus australis)

2019 ◽  
Vol 92 (3) ◽  
pp. 326-338 ◽  
Author(s):  
Mauricio Seguel ◽  
Diego Perez-Venegas ◽  
Josefina Gutierrez ◽  
Daniel E. Crocker ◽  
Eugene J. DeRango
Keyword(s):  
Stress Response ◽  
Immune Function ◽  
South American ◽  
Fur Seals
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