Supplementary tables and figures from Population-specific sex and size variation in long-term foraging ecology of belugas and narwhals
Intraspecific variation in resource use by individuals of different age, sex or size may reflect differing energetic requirements and physiological constraints. Males and females often show differences in diet due to sexual size dimorphism, different life histories and/or habitat use. Here, we inves...
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ftroysocietyfig:oai:figshare.com:article/13637504 2023-05-15T15:07:03+02:00 Supplementary tables and figures from Population-specific sex and size variation in long-term foraging ecology of belugas and narwhals Marie Louis Mikkel Skovrind Eva Garde Mads Peter Heide-Jørgensen Paul Szpak Eline D. Lorenzen 2021-01-25T15:01:31Z https://doi.org/10.6084/m9.figshare.13637504.v1 https://figshare.com/articles/journal_contribution/Supplementary_tables_and_figures_from_Population-specific_sex_and_size_variation_in_long-term_foraging_ecology_of_belugas_and_narwhals/13637504 unknown doi:10.6084/m9.figshare.13637504.v1 https://figshare.com/articles/journal_contribution/Supplementary_tables_and_figures_from_Population-specific_sex_and_size_variation_in_long-term_foraging_ecology_of_belugas_and_narwhals/13637504 CC BY 4.0 CC-BY Ecology stable isotopes Arctic cetaceans carbon nitrogen Text Journal contribution 2021 ftroysocietyfig https://doi.org/10.6084/m9.figshare.13637504.v1 2022-01-01T19:15:26Z Intraspecific variation in resource use by individuals of different age, sex or size may reflect differing energetic requirements and physiological constraints. Males and females often show differences in diet due to sexual size dimorphism, different life histories and/or habitat use. Here, we investigate how sex and size influence the long-term foraging ecology of belugas and narwhals in Greenland, using stable isotopes of carbon and nitrogen from bone collagen. We show that males have a higher trophic level and a larger ecological niche than females in West Greenland belugas and in East Greenland narwhals. In addition, for these two populations, we find that δ 15 N increases with size, particularly in males. We hypothesize that sexual size dimorphism together with strong maternal investment drive these differences. By contrast, we find no differences in foraging ecology between sexes in West Greenland narwhals and observe no influence of size on the trophic level. This may reflect the influence of interspecific competition in West Greenland, where the distributions of belugas and narwhals overlap, and/or geographic resource partitioning among different summer aggregations of narwhals. Our results suggest that sex and size variations in the diet are population dependent, and likely the result of varying ecological interactions. Other Non-Article Part of Journal/Newspaper Arctic Beluga* East Greenland Greenland narwhal* The Royal Society: Figshare Arctic Greenland |
institution |
Open Polar |
collection |
The Royal Society: Figshare |
op_collection_id |
ftroysocietyfig |
language |
unknown |
topic |
Ecology stable isotopes Arctic cetaceans carbon nitrogen |
spellingShingle |
Ecology stable isotopes Arctic cetaceans carbon nitrogen Marie Louis Mikkel Skovrind Eva Garde Mads Peter Heide-Jørgensen Paul Szpak Eline D. Lorenzen Supplementary tables and figures from Population-specific sex and size variation in long-term foraging ecology of belugas and narwhals |
topic_facet |
Ecology stable isotopes Arctic cetaceans carbon nitrogen |
description |
Intraspecific variation in resource use by individuals of different age, sex or size may reflect differing energetic requirements and physiological constraints. Males and females often show differences in diet due to sexual size dimorphism, different life histories and/or habitat use. Here, we investigate how sex and size influence the long-term foraging ecology of belugas and narwhals in Greenland, using stable isotopes of carbon and nitrogen from bone collagen. We show that males have a higher trophic level and a larger ecological niche than females in West Greenland belugas and in East Greenland narwhals. In addition, for these two populations, we find that δ 15 N increases with size, particularly in males. We hypothesize that sexual size dimorphism together with strong maternal investment drive these differences. By contrast, we find no differences in foraging ecology between sexes in West Greenland narwhals and observe no influence of size on the trophic level. This may reflect the influence of interspecific competition in West Greenland, where the distributions of belugas and narwhals overlap, and/or geographic resource partitioning among different summer aggregations of narwhals. Our results suggest that sex and size variations in the diet are population dependent, and likely the result of varying ecological interactions. |
format |
Other Non-Article Part of Journal/Newspaper |
author |
Marie Louis Mikkel Skovrind Eva Garde Mads Peter Heide-Jørgensen Paul Szpak Eline D. Lorenzen |
author_facet |
Marie Louis Mikkel Skovrind Eva Garde Mads Peter Heide-Jørgensen Paul Szpak Eline D. Lorenzen |
author_sort |
Marie Louis |
title |
Supplementary tables and figures from Population-specific sex and size variation in long-term foraging ecology of belugas and narwhals |
title_short |
Supplementary tables and figures from Population-specific sex and size variation in long-term foraging ecology of belugas and narwhals |
title_full |
Supplementary tables and figures from Population-specific sex and size variation in long-term foraging ecology of belugas and narwhals |
title_fullStr |
Supplementary tables and figures from Population-specific sex and size variation in long-term foraging ecology of belugas and narwhals |
title_full_unstemmed |
Supplementary tables and figures from Population-specific sex and size variation in long-term foraging ecology of belugas and narwhals |
title_sort |
supplementary tables and figures from population-specific sex and size variation in long-term foraging ecology of belugas and narwhals |
publishDate |
2021 |
url |
https://doi.org/10.6084/m9.figshare.13637504.v1 https://figshare.com/articles/journal_contribution/Supplementary_tables_and_figures_from_Population-specific_sex_and_size_variation_in_long-term_foraging_ecology_of_belugas_and_narwhals/13637504 |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic Beluga* East Greenland Greenland narwhal* |
genre_facet |
Arctic Beluga* East Greenland Greenland narwhal* |
op_relation |
doi:10.6084/m9.figshare.13637504.v1 https://figshare.com/articles/journal_contribution/Supplementary_tables_and_figures_from_Population-specific_sex_and_size_variation_in_long-term_foraging_ecology_of_belugas_and_narwhals/13637504 |
op_rights |
CC BY 4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.6084/m9.figshare.13637504.v1 |
_version_ |
1766338614442065920 |