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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Language: | English |
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Inter Research
2021
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Online Access: | https://oceanrep.geomar.de/id/eprint/52173/ https://oceanrep.geomar.de/id/eprint/52173/1/m658p105.pdf https://oceanrep.geomar.de/id/eprint/52173/2/m658p105_supp.xlsx https://doi.org/10.3354/meps13556 |
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ftoceanrep:oai:oceanrep.geomar.de:52173 2024-02-11T09:58:48+01:00 Ecology of Moroteuthopsis longimana at the sub-Antarctic Prince Edward Islands, revealed through stable isotope analysis of squid beaks van Tonder, Andre Lübcker, Nico Guerreiro, Miguel Xavier, Jose C. Cherel, Yves de Bruyn, P. J. Nico 2021-01-21 text other https://oceanrep.geomar.de/id/eprint/52173/ https://oceanrep.geomar.de/id/eprint/52173/1/m658p105.pdf https://oceanrep.geomar.de/id/eprint/52173/2/m658p105_supp.xlsx https://doi.org/10.3354/meps13556 en eng Inter Research https://oceanrep.geomar.de/id/eprint/52173/1/m658p105.pdf https://oceanrep.geomar.de/id/eprint/52173/2/m658p105_supp.xlsx van Tonder, A., Lübcker, N., Guerreiro, M., Xavier, J. C., Cherel, Y. and 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 . pp. 105-115. DOI 10.3354/meps13556 <https://doi.org/10.3354/meps13556>. doi:10.3354/meps13556 info:eu-repo/semantics/embargoedAccess Article PeerReviewed 2021 ftoceanrep https://doi.org/10.3354/meps13556 2024-01-15T00:23:13Z 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 delta C-13 and delta N-15 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 (delta C-13 = -24.0 +/- 1.0 parts per thousand, mean +/- SD) for M. longimana, consistent with albatrosses foraging at the Southwest Indian Ridge, as opposed to broader foraging zones utilised by albatrosses from Iles Crozet and Iles Kerguelen. Slightly lower delta N-15 values (5.4 +/- 0.7 parts per thousand) 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 delta C-13 and delta N-15 values, but individual variation in these shifts requires further investigation. Article in Journal/Newspaper Antarc* Antarctic Prince Edward Islands Southern Ocean OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Antarctic Southern Ocean Kerguelen Indian Marine Ecology Progress Series 658 105 115 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
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ftoceanrep |
language |
English |
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 delta C-13 and delta N-15 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 (delta C-13 = -24.0 +/- 1.0 parts per thousand, mean +/- SD) for M. longimana, consistent with albatrosses foraging at the Southwest Indian Ridge, as opposed to broader foraging zones utilised by albatrosses from Iles Crozet and Iles Kerguelen. Slightly lower delta N-15 values (5.4 +/- 0.7 parts per thousand) 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 delta C-13 and delta N-15 values, but individual variation in these shifts requires further investigation. |
format |
Article in Journal/Newspaper |
author |
van Tonder, Andre Lübcker, Nico Guerreiro, Miguel Xavier, Jose C. Cherel, Yves de Bruyn, P. J. Nico |
spellingShingle |
van Tonder, Andre Lübcker, Nico Guerreiro, Miguel Xavier, Jose C. Cherel, Yves de Bruyn, P. J. Nico Ecology of Moroteuthopsis longimana at the sub-Antarctic Prince Edward Islands, revealed through stable isotope analysis of squid beaks |
author_facet |
van Tonder, Andre Lübcker, Nico Guerreiro, Miguel Xavier, Jose C. Cherel, Yves de Bruyn, P. J. Nico |
author_sort |
van Tonder, Andre |
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 |
https://oceanrep.geomar.de/id/eprint/52173/ https://oceanrep.geomar.de/id/eprint/52173/1/m658p105.pdf https://oceanrep.geomar.de/id/eprint/52173/2/m658p105_supp.xlsx https://doi.org/10.3354/meps13556 |
geographic |
Antarctic Southern Ocean Kerguelen Indian |
geographic_facet |
Antarctic Southern Ocean Kerguelen Indian |
genre |
Antarc* Antarctic Prince Edward Islands Southern Ocean |
genre_facet |
Antarc* Antarctic Prince Edward Islands Southern Ocean |
op_relation |
https://oceanrep.geomar.de/id/eprint/52173/1/m658p105.pdf https://oceanrep.geomar.de/id/eprint/52173/2/m658p105_supp.xlsx van Tonder, A., Lübcker, N., Guerreiro, M., Xavier, J. C., Cherel, Y. and 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 . pp. 105-115. DOI 10.3354/meps13556 <https://doi.org/10.3354/meps13556>. doi:10.3354/meps13556 |
op_rights |
info:eu-repo/semantics/embargoedAccess |
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_ |
1790594560065273856 |