Ecology of Moroteuthopsis longimana at the sub-Antarctic Prince Edward Islands, revealed through stable isotope analysis of squid beaks.
Understanding the underlying ecological factors that affect the distribution patterns of organisms is vital for their conservation. Cephalopods such as giant warty squids Moroteuthopsis longimana are important in the diets of marine predators, including grey-headed albatrosses Thalassarche chrysosto...
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2021
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Online Access: | http://nora.nerc.ac.uk/id/eprint/529486/ https://www.int-res.com/abstracts/meps/v658/p105-115/ |
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ftnerc:oai:nora.nerc.ac.uk:529486 2023-05-15T13:41:45+02:00 Ecology of Moroteuthopsis longimana at the sub-Antarctic Prince Edward Islands, revealed through stable isotope analysis of squid beaks. van Tonder, A. Lübcker, N. Guerreiro, M. Xavier, J.C. Cherel, Y. de Bruyn, P.J.N. 2021-01-21 http://nora.nerc.ac.uk/id/eprint/529486/ https://www.int-res.com/abstracts/meps/v658/p105-115/ unknown Inter-Research van Tonder, A.; Lübcker, N.; Guerreiro, M.; Xavier, J.C. orcid:0000-0002-9621-6660 Cherel, Y.; de Bruyn, P.J.N. 2021 Ecology of Moroteuthopsis longimana at the sub-Antarctic Prince Edward Islands, revealed through stable isotope analysis of squid beaks. Marine Ecology Progress Series, 658. 105-115. https://doi.org/10.3354/meps13556 <https://doi.org/10.3354/meps13556> Publication - Article PeerReviewed 2021 ftnerc https://doi.org/10.3354/meps13556 2023-02-04T19:51:38Z Understanding the underlying ecological factors that affect the distribution patterns of organisms is vital for their conservation. Cephalopods such as giant warty squids Moroteuthopsis longimana are important in the diets of marine predators, including grey-headed albatrosses Thalassarche chrysostoma, yet our understanding of their habitat and trophic ecology remains limited. We investigated the habitat and trophic niche utilised by M. longimana through the δ13C and δ15N profiles captured in their beaks. M. longimana beaks were collected around grey-headed albatross nests at the Prince Edward Islands during 2004 and 2013 (n = 40 beaks). The results showed distinctly Antarctic distributions (δ13C = -24.0 ± 1.0‰, mean ± SD) for M. longimana, consistent with albatrosses foraging at the Southwest Indian Ridge, as opposed to broader foraging zones utilised by albatrosses from Îles Crozet and Îles Kerguelen. Slightly lower δ15N values (5.4 ± 0.7‰) were found compared to other islands in the Indian Sector of the Southern Ocean, which may indicate more crustaceans in the squid diets. Sequential sampling along the lateral walls of individual beaks (n = 4) revealed ontogenetic shifts in δ13C and δ15N values, but individual variation in these shifts requires further investigation. Article in Journal/Newspaper Antarc* Antarctic Îles Crozet Prince Edward Islands Southern Ocean Natural Environment Research Council: NERC Open Research Archive Antarctic Southern Ocean Kerguelen Indian Îles Kerguelen ENVELOPE(69.167,69.167,-49.250,-49.250) Marine Ecology Progress Series 658 105 115 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
unknown |
description |
Understanding the underlying ecological factors that affect the distribution patterns of organisms is vital for their conservation. Cephalopods such as giant warty squids Moroteuthopsis longimana are important in the diets of marine predators, including grey-headed albatrosses Thalassarche chrysostoma, yet our understanding of their habitat and trophic ecology remains limited. We investigated the habitat and trophic niche utilised by M. longimana through the δ13C and δ15N profiles captured in their beaks. M. longimana beaks were collected around grey-headed albatross nests at the Prince Edward Islands during 2004 and 2013 (n = 40 beaks). The results showed distinctly Antarctic distributions (δ13C = -24.0 ± 1.0‰, mean ± SD) for M. longimana, consistent with albatrosses foraging at the Southwest Indian Ridge, as opposed to broader foraging zones utilised by albatrosses from Îles Crozet and Îles Kerguelen. Slightly lower δ15N values (5.4 ± 0.7‰) were found compared to other islands in the Indian Sector of the Southern Ocean, which may indicate more crustaceans in the squid diets. Sequential sampling along the lateral walls of individual beaks (n = 4) revealed ontogenetic shifts in δ13C and δ15N values, but individual variation in these shifts requires further investigation. |
format |
Article in Journal/Newspaper |
author |
van Tonder, A. Lübcker, N. Guerreiro, M. Xavier, J.C. Cherel, Y. de Bruyn, P.J.N. |
spellingShingle |
van Tonder, A. Lübcker, N. Guerreiro, M. Xavier, J.C. Cherel, Y. de Bruyn, P.J.N. Ecology of Moroteuthopsis longimana at the sub-Antarctic Prince Edward Islands, revealed through stable isotope analysis of squid beaks. |
author_facet |
van Tonder, A. Lübcker, N. Guerreiro, M. Xavier, J.C. Cherel, Y. de Bruyn, P.J.N. |
author_sort |
van Tonder, A. |
title |
Ecology of Moroteuthopsis longimana at the sub-Antarctic Prince Edward Islands, revealed through stable isotope analysis of squid beaks. |
title_short |
Ecology of Moroteuthopsis longimana at the sub-Antarctic Prince Edward Islands, revealed through stable isotope analysis of squid beaks. |
title_full |
Ecology of Moroteuthopsis longimana at the sub-Antarctic Prince Edward Islands, revealed through stable isotope analysis of squid beaks. |
title_fullStr |
Ecology of Moroteuthopsis longimana at the sub-Antarctic Prince Edward Islands, revealed through stable isotope analysis of squid beaks. |
title_full_unstemmed |
Ecology of Moroteuthopsis longimana at the sub-Antarctic Prince Edward Islands, revealed through stable isotope analysis of squid beaks. |
title_sort |
ecology of moroteuthopsis longimana at the sub-antarctic prince edward islands, revealed through stable isotope analysis of squid beaks. |
publisher |
Inter-Research |
publishDate |
2021 |
url |
http://nora.nerc.ac.uk/id/eprint/529486/ https://www.int-res.com/abstracts/meps/v658/p105-115/ |
long_lat |
ENVELOPE(69.167,69.167,-49.250,-49.250) |
geographic |
Antarctic Southern Ocean Kerguelen Indian Îles Kerguelen |
geographic_facet |
Antarctic Southern Ocean Kerguelen Indian Îles Kerguelen |
genre |
Antarc* Antarctic Îles Crozet Prince Edward Islands Southern Ocean |
genre_facet |
Antarc* Antarctic Îles Crozet Prince Edward Islands Southern Ocean |
op_relation |
van Tonder, A.; Lübcker, N.; Guerreiro, M.; Xavier, J.C. orcid:0000-0002-9621-6660 Cherel, Y.; de Bruyn, P.J.N. 2021 Ecology of Moroteuthopsis longimana at the sub-Antarctic Prince Edward Islands, revealed through stable isotope analysis of squid beaks. Marine Ecology Progress Series, 658. 105-115. https://doi.org/10.3354/meps13556 <https://doi.org/10.3354/meps13556> |
op_doi |
https://doi.org/10.3354/meps13556 |
container_title |
Marine Ecology Progress Series |
container_volume |
658 |
container_start_page |
105 |
op_container_end_page |
115 |
_version_ |
1766157253848596480 |