Prey of the Antarctic fur seal Arctocephalus gazella at Marion Island
The prey of Antarctic fur seals, Arctocephalus gazella, was investigated through scat analysis at Marion Island from 1996 until 2000. A total of 25 different prey species were identified from scats, of which 21 were fish, 1 crustacean and 3 cephalopods. Fish were by far the main prey item, occurring...
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ftunivpretoria:oai:repository.up.ac.za:2263/9654 2023-05-15T13:48:21+02:00 Prey of the Antarctic fur seal Arctocephalus gazella at Marion Island Makhado, Azwianewi Benedict Bester, Marthan Nieuwoudt Kirkman, Steve P. (Stephen Patrick) Pistorius, Pierre Anton Ferguson, Jan Willem Helenus Klages, N.T.W. 2008 http://hdl.handle.net/2263/9654 https://doi.org/10.1007/s00300-007-0391-y en eng Springer http://hdl.handle.net/2263/9654 Makhado, AB, Bester, MN, Kirkman, SP, Pistorius, PA, Ferguson, JWH & Klages, NTW 2008, ‘Prey of the Antarctic fur seal Arctocephalus gezella at Marion Island’, Polar Biology, vol. 31, no. 5, pp. 575-581. [http://www.springer.com/life+sci/ecology/journal/300] 0722-4060 doi:10.1007/s00300-007-0391-y Springer. The original publication is available at www.springerlink.com Arctocephalus gazella Otoliths Prey species Frequency of occurrence Numerical abundance Postprint Article 2008 ftunivpretoria https://doi.org/10.1007/s00300-007-0391-y 2022-05-31T13:36:04Z The prey of Antarctic fur seals, Arctocephalus gazella, was investigated through scat analysis at Marion Island from 1996 until 2000. A total of 25 different prey species were identified from scats, of which 21 were fish, 1 crustacean and 3 cephalopods. Fish were by far the main prey item, occurring in 96.1% of samples, followed by crustaceans (2.7%) and cephalopods (1.2%). Fishes from the family Myctophidae (Gymnoscopelus piabilis, Electrona carlsbergi, G. fraseri and E. subaspera) were the most abundant prey (97.2%) every year, while those from the families Notothenididae, Paralepididae, Notosudidae, Microstomatidae and Gempylidae were present in small numbers. G. piabilis, E. carlsbergi, E. subaspera and G. nicholsi contributed the most in terms of biomass to the diet. Significant seasonal differences existed in the diet when comparing summer and winter. G. piabilis, K. anderssoni, P. bolini and P. choriodon dominated in summer as opposed to E. carlsbergi, E. subaspera, G. fraseri and G. nicholsi that dominated in winter. The fish varied in size and mass, from the small K. anderssoni to the large Paranotothenia magellanica. Cephalopods and the crustacean Nauticaris marionis, in very low numbers and in winter, appeared in the scats, but not in all years of study. Unidentified penguin remains rarely turned up in scats. Article in Journal/Newspaper Antarc* Antarctic Antarctic Fur Seal Antarctic Fur Seals Arctocephalus gazella Marion Island Polar Biology University of Pretoria: UPSpace Antarctic The Antarctic Polar Biology 31 5 575 581 |
institution |
Open Polar |
collection |
University of Pretoria: UPSpace |
op_collection_id |
ftunivpretoria |
language |
English |
topic |
Arctocephalus gazella Otoliths Prey species Frequency of occurrence Numerical abundance |
spellingShingle |
Arctocephalus gazella Otoliths Prey species Frequency of occurrence Numerical abundance Makhado, Azwianewi Benedict Bester, Marthan Nieuwoudt Kirkman, Steve P. (Stephen Patrick) Pistorius, Pierre Anton Ferguson, Jan Willem Helenus Klages, N.T.W. Prey of the Antarctic fur seal Arctocephalus gazella at Marion Island |
topic_facet |
Arctocephalus gazella Otoliths Prey species Frequency of occurrence Numerical abundance |
description |
The prey of Antarctic fur seals, Arctocephalus gazella, was investigated through scat analysis at Marion Island from 1996 until 2000. A total of 25 different prey species were identified from scats, of which 21 were fish, 1 crustacean and 3 cephalopods. Fish were by far the main prey item, occurring in 96.1% of samples, followed by crustaceans (2.7%) and cephalopods (1.2%). Fishes from the family Myctophidae (Gymnoscopelus piabilis, Electrona carlsbergi, G. fraseri and E. subaspera) were the most abundant prey (97.2%) every year, while those from the families Notothenididae, Paralepididae, Notosudidae, Microstomatidae and Gempylidae were present in small numbers. G. piabilis, E. carlsbergi, E. subaspera and G. nicholsi contributed the most in terms of biomass to the diet. Significant seasonal differences existed in the diet when comparing summer and winter. G. piabilis, K. anderssoni, P. bolini and P. choriodon dominated in summer as opposed to E. carlsbergi, E. subaspera, G. fraseri and G. nicholsi that dominated in winter. The fish varied in size and mass, from the small K. anderssoni to the large Paranotothenia magellanica. Cephalopods and the crustacean Nauticaris marionis, in very low numbers and in winter, appeared in the scats, but not in all years of study. Unidentified penguin remains rarely turned up in scats. |
format |
Article in Journal/Newspaper |
author |
Makhado, Azwianewi Benedict Bester, Marthan Nieuwoudt Kirkman, Steve P. (Stephen Patrick) Pistorius, Pierre Anton Ferguson, Jan Willem Helenus Klages, N.T.W. |
author_facet |
Makhado, Azwianewi Benedict Bester, Marthan Nieuwoudt Kirkman, Steve P. (Stephen Patrick) Pistorius, Pierre Anton Ferguson, Jan Willem Helenus Klages, N.T.W. |
author_sort |
Makhado, Azwianewi Benedict |
title |
Prey of the Antarctic fur seal Arctocephalus gazella at Marion Island |
title_short |
Prey of the Antarctic fur seal Arctocephalus gazella at Marion Island |
title_full |
Prey of the Antarctic fur seal Arctocephalus gazella at Marion Island |
title_fullStr |
Prey of the Antarctic fur seal Arctocephalus gazella at Marion Island |
title_full_unstemmed |
Prey of the Antarctic fur seal Arctocephalus gazella at Marion Island |
title_sort |
prey of the antarctic fur seal arctocephalus gazella at marion island |
publisher |
Springer |
publishDate |
2008 |
url |
http://hdl.handle.net/2263/9654 https://doi.org/10.1007/s00300-007-0391-y |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Antarctic Fur Seal Antarctic Fur Seals Arctocephalus gazella Marion Island Polar Biology |
genre_facet |
Antarc* Antarctic Antarctic Fur Seal Antarctic Fur Seals Arctocephalus gazella Marion Island Polar Biology |
op_relation |
http://hdl.handle.net/2263/9654 Makhado, AB, Bester, MN, Kirkman, SP, Pistorius, PA, Ferguson, JWH & Klages, NTW 2008, ‘Prey of the Antarctic fur seal Arctocephalus gezella at Marion Island’, Polar Biology, vol. 31, no. 5, pp. 575-581. [http://www.springer.com/life+sci/ecology/journal/300] 0722-4060 doi:10.1007/s00300-007-0391-y |
op_rights |
Springer. The original publication is available at www.springerlink.com |
op_doi |
https://doi.org/10.1007/s00300-007-0391-y |
container_title |
Polar Biology |
container_volume |
31 |
container_issue |
5 |
container_start_page |
575 |
op_container_end_page |
581 |
_version_ |
1766249169970790400 |