Dietary variation of the squid Moroteuthis ingens at four sites in the Southern Ocean: stomach contents, lipid and fatty acid profiles
Specimens of the onychoteuthid squid Moroteuthis ingens were collected from four sites in the Southern Ocean: Macquarie Island, the Falkland Islands, the Chatham Rise (New Zealand) and the Campbell Plateau (New Zealand). Spatial variations in diet among these areas were investigated using stomach co...
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ftunivtasecite:oai:ecite.utas.edu.au:29133 2023-05-15T14:03:54+02:00 Dietary variation of the squid Moroteuthis ingens at four sites in the Southern Ocean: stomach contents, lipid and fatty acid profiles Phillips, K Nichols, PD Jackson, GD 2003 https://doi.org/10.1017/S0025315403007446h http://ecite.utas.edu.au/29133 en eng Cambridge Univ Press http://dx.doi.org/10.1017/S0025315403007446h Phillips, K and Nichols, PD and Jackson, GD, Dietary variation of the squid Moroteuthis ingens at four sites in the Southern Ocean: stomach contents, lipid and fatty acid profiles, Journal of the Marine Biological Association of the United Kingdom, 83, (3) pp. 523-534. ISSN 0025-3154 (2003) [Refereed Article] http://ecite.utas.edu.au/29133 Biological Sciences Ecology Marine and Estuarine Ecology (incl. Marine Ichthyology) Refereed Article PeerReviewed 2003 ftunivtasecite https://doi.org/10.1017/S0025315403007446h 2019-12-13T21:09:21Z Specimens of the onychoteuthid squid Moroteuthis ingens were collected from four sites in the Southern Ocean: Macquarie Island, the Falkland Islands, the Chatham Rise (New Zealand) and the Campbell Plateau (New Zealand). Spatial variations in diet among these areas were investigated using stomach contents and lipid and fatty acid profiles. Myctophid fish were prominent prey items at all sites, and the diet at New Zealand sites contained temperate myctophid species that were not identified at other sites. The diet at the Falkland Islands differed considerably from other sites due to the large proportion of cephalopod prey that had been consumed by M. ingens. This is likely to be due to the absence of key myctophids, such as Electrona carlsbergi, and the abundance of smaller squid such as Loligo gahi and juvenile M. ingens over the Patagonian Shelf. Stomach contents data could not be used effectively to determine dietary differences between the Chatham Rise and Campbell Plateau, largely due to differences in sample sizes between these sites. Lipid class and fatty acid profiles of the digestive gland indicated that the diet of M. ingens differed significantly between the Chatham Rise and Campbell Plateau, despite the relative proximity of these sites. We conclude from total lipid content that this was due to a reduction in food availability to M. ingens at the Campbell Plateau. The highly productive waters of the Subtropical Front pass over the Chatham Rise, whereas the Campbell Plateau is situated in less productive sub-Antarctic water. Differences in oceanographic conditions are likely to have driven dietary variations between these two sites. Article in Journal/Newspaper Antarc* Antarctic Macquarie Island Southern Ocean eCite UTAS (University of Tasmania) Antarctic Campbell Plateau ENVELOPE(171.000,171.000,-50.667,-50.667) New Zealand Southern Ocean Journal of the Marine Biological Association of the United Kingdom 83 3 523 534 |
institution |
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) Phillips, K Nichols, PD Jackson, GD Dietary variation of the squid Moroteuthis ingens at four sites in the Southern Ocean: stomach contents, lipid and fatty acid profiles |
topic_facet |
Biological Sciences Ecology Marine and Estuarine Ecology (incl. Marine Ichthyology) |
description |
Specimens of the onychoteuthid squid Moroteuthis ingens were collected from four sites in the Southern Ocean: Macquarie Island, the Falkland Islands, the Chatham Rise (New Zealand) and the Campbell Plateau (New Zealand). Spatial variations in diet among these areas were investigated using stomach contents and lipid and fatty acid profiles. Myctophid fish were prominent prey items at all sites, and the diet at New Zealand sites contained temperate myctophid species that were not identified at other sites. The diet at the Falkland Islands differed considerably from other sites due to the large proportion of cephalopod prey that had been consumed by M. ingens. This is likely to be due to the absence of key myctophids, such as Electrona carlsbergi, and the abundance of smaller squid such as Loligo gahi and juvenile M. ingens over the Patagonian Shelf. Stomach contents data could not be used effectively to determine dietary differences between the Chatham Rise and Campbell Plateau, largely due to differences in sample sizes between these sites. Lipid class and fatty acid profiles of the digestive gland indicated that the diet of M. ingens differed significantly between the Chatham Rise and Campbell Plateau, despite the relative proximity of these sites. We conclude from total lipid content that this was due to a reduction in food availability to M. ingens at the Campbell Plateau. The highly productive waters of the Subtropical Front pass over the Chatham Rise, whereas the Campbell Plateau is situated in less productive sub-Antarctic water. Differences in oceanographic conditions are likely to have driven dietary variations between these two sites. |
format |
Article in Journal/Newspaper |
author |
Phillips, K Nichols, PD Jackson, GD |
author_facet |
Phillips, K Nichols, PD Jackson, GD |
author_sort |
Phillips, K |
title |
Dietary variation of the squid Moroteuthis ingens at four sites in the Southern Ocean: stomach contents, lipid and fatty acid profiles |
title_short |
Dietary variation of the squid Moroteuthis ingens at four sites in the Southern Ocean: stomach contents, lipid and fatty acid profiles |
title_full |
Dietary variation of the squid Moroteuthis ingens at four sites in the Southern Ocean: stomach contents, lipid and fatty acid profiles |
title_fullStr |
Dietary variation of the squid Moroteuthis ingens at four sites in the Southern Ocean: stomach contents, lipid and fatty acid profiles |
title_full_unstemmed |
Dietary variation of the squid Moroteuthis ingens at four sites in the Southern Ocean: stomach contents, lipid and fatty acid profiles |
title_sort |
dietary variation of the squid moroteuthis ingens at four sites in the southern ocean: stomach contents, lipid and fatty acid profiles |
publisher |
Cambridge Univ Press |
publishDate |
2003 |
url |
https://doi.org/10.1017/S0025315403007446h http://ecite.utas.edu.au/29133 |
long_lat |
ENVELOPE(171.000,171.000,-50.667,-50.667) |
geographic |
Antarctic Campbell Plateau New Zealand Southern Ocean |
geographic_facet |
Antarctic Campbell Plateau New Zealand Southern Ocean |
genre |
Antarc* Antarctic Macquarie Island Southern Ocean |
genre_facet |
Antarc* Antarctic Macquarie Island Southern Ocean |
op_relation |
http://dx.doi.org/10.1017/S0025315403007446h Phillips, K and Nichols, PD and Jackson, GD, Dietary variation of the squid Moroteuthis ingens at four sites in the Southern Ocean: stomach contents, lipid and fatty acid profiles, Journal of the Marine Biological Association of the United Kingdom, 83, (3) pp. 523-534. ISSN 0025-3154 (2003) [Refereed Article] http://ecite.utas.edu.au/29133 |
op_doi |
https://doi.org/10.1017/S0025315403007446h |
container_title |
Journal of the Marine Biological Association of the United Kingdom |
container_volume |
83 |
container_issue |
3 |
container_start_page |
523 |
op_container_end_page |
534 |
_version_ |
1766274768436199424 |