The diet of itinerant male Hooker's sea lions, Phocarctos hookeri, at sub-Antarctic Macquarie Island
Scats were collected from itinerant male Hooker's sea lions, Phocarctos hookeri, at Macquarie Island and the uneroded faunal remains used to assess the diet. Uneroded sagittal otoliths were used to identify teleost fish and to calculate fish size. Prey items included 14 taxa of teleost fish, ce...
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1999
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Online Access: | https://doi.org/10.1071/WR98079 http://ecite.utas.edu.au/16827 |
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ftunivtasecite:oai:ecite.utas.edu.au:16827 2023-05-15T13:59:07+02:00 The diet of itinerant male Hooker's sea lions, Phocarctos hookeri, at sub-Antarctic Macquarie Island McMahon, CR Hooley, D Robinson, S 1999 https://doi.org/10.1071/WR98079 http://ecite.utas.edu.au/16827 en eng CSIRO Publishing http://dx.doi.org/10.1071/WR98079 McMahon, CR and Hooley, D and Robinson, S, The diet of itinerant male Hooker's sea lions, Phocarctos hookeri, at sub-Antarctic Macquarie Island, Wildlife Research, 26, (6) pp. 839-846. ISSN 1035-3712 (1999) [Refereed Article] http://ecite.utas.edu.au/16827 Biological Sciences Ecology Marine and Estuarine Ecology (incl. Marine Ichthyology) Refereed Article PeerReviewed 1999 ftunivtasecite https://doi.org/10.1071/WR98079 2019-12-13T21:00:12Z Scats were collected from itinerant male Hooker's sea lions, Phocarctos hookeri, at Macquarie Island and the uneroded faunal remains used to assess the diet. Uneroded sagittal otoliths were used to identify teleost fish and to calculate fish size. Prey items included 14 taxa of teleost fish, cephalopods, gastropods, crustaceans and fur seals. Fish constituted the primary component of the diet. Prey species previously uncommon in the diet of seals and penguins around Macquarie Island were commonly eaten by Hooker's sea lions. The sub-Antarctic horse fish (Zanclorhynchus spinifer) and the Patagonian tooth fish (Dissostichus eleginoides) were the two most abundant species and occurred in 62.5% and 41.7% of all scats respectively. There were no age-specific and individual differences in the diet of sea lions. Seasonal variances in diet were absent. Small plastic fragments (diameter ~1 mm) were found only in association with otoliths of Electrona subaspera. Some overlap was seen between the diet of itinerant male Hooker's sea lions and the commercial fisheries that currently operate around Macquarie Island. Article in Journal/Newspaper Antarc* Antarctic Macquarie Island eCite UTAS (University of Tasmania) Antarctic Wildlife Research 26 6 839 |
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Open Polar |
collection |
eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Biological Sciences Ecology Marine and Estuarine Ecology (incl. Marine Ichthyology) |
spellingShingle |
Biological Sciences Ecology Marine and Estuarine Ecology (incl. Marine Ichthyology) McMahon, CR Hooley, D Robinson, S The diet of itinerant male Hooker's sea lions, Phocarctos hookeri, at sub-Antarctic Macquarie Island |
topic_facet |
Biological Sciences Ecology Marine and Estuarine Ecology (incl. Marine Ichthyology) |
description |
Scats were collected from itinerant male Hooker's sea lions, Phocarctos hookeri, at Macquarie Island and the uneroded faunal remains used to assess the diet. Uneroded sagittal otoliths were used to identify teleost fish and to calculate fish size. Prey items included 14 taxa of teleost fish, cephalopods, gastropods, crustaceans and fur seals. Fish constituted the primary component of the diet. Prey species previously uncommon in the diet of seals and penguins around Macquarie Island were commonly eaten by Hooker's sea lions. The sub-Antarctic horse fish (Zanclorhynchus spinifer) and the Patagonian tooth fish (Dissostichus eleginoides) were the two most abundant species and occurred in 62.5% and 41.7% of all scats respectively. There were no age-specific and individual differences in the diet of sea lions. Seasonal variances in diet were absent. Small plastic fragments (diameter ~1 mm) were found only in association with otoliths of Electrona subaspera. Some overlap was seen between the diet of itinerant male Hooker's sea lions and the commercial fisheries that currently operate around Macquarie Island. |
format |
Article in Journal/Newspaper |
author |
McMahon, CR Hooley, D Robinson, S |
author_facet |
McMahon, CR Hooley, D Robinson, S |
author_sort |
McMahon, CR |
title |
The diet of itinerant male Hooker's sea lions, Phocarctos hookeri, at sub-Antarctic Macquarie Island |
title_short |
The diet of itinerant male Hooker's sea lions, Phocarctos hookeri, at sub-Antarctic Macquarie Island |
title_full |
The diet of itinerant male Hooker's sea lions, Phocarctos hookeri, at sub-Antarctic Macquarie Island |
title_fullStr |
The diet of itinerant male Hooker's sea lions, Phocarctos hookeri, at sub-Antarctic Macquarie Island |
title_full_unstemmed |
The diet of itinerant male Hooker's sea lions, Phocarctos hookeri, at sub-Antarctic Macquarie Island |
title_sort |
diet of itinerant male hooker's sea lions, phocarctos hookeri, at sub-antarctic macquarie island |
publisher |
CSIRO Publishing |
publishDate |
1999 |
url |
https://doi.org/10.1071/WR98079 http://ecite.utas.edu.au/16827 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Macquarie Island |
genre_facet |
Antarc* Antarctic Macquarie Island |
op_relation |
http://dx.doi.org/10.1071/WR98079 McMahon, CR and Hooley, D and Robinson, S, The diet of itinerant male Hooker's sea lions, Phocarctos hookeri, at sub-Antarctic Macquarie Island, Wildlife Research, 26, (6) pp. 839-846. ISSN 1035-3712 (1999) [Refereed Article] http://ecite.utas.edu.au/16827 |
op_doi |
https://doi.org/10.1071/WR98079 |
container_title |
Wildlife Research |
container_volume |
26 |
container_issue |
6 |
container_start_page |
839 |
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1766267498390355968 |