Do ingredient and nutrient intake reveal individual dietary specialization in an omnivorous carnivore, the brown bear?
Generalist populations often harbor individual dietary specialists. Whether using a narrower set of resources than the population (= specialization) affects specialists' nutrient intake remains underexplored. We evaluated variation in ingredient and nutrient specialization in a European brown b...
Published in: | Wildlife Biology |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Wiley
2024
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Online Access: | https://biblio.ugent.be/publication/01J4VGH1DXX9AG3TKK3VBR25ZB http://hdl.handle.net/1854/LU-01J4VGH1DXX9AG3TKK3VBR25ZB https://doi.org/10.1002/wlb3.01305 https://biblio.ugent.be/publication/01J4VGH1DXX9AG3TKK3VBR25ZB/file/01J6F3KQ6706EFG1YBRJ391E7G |
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ftunivgent:oai:archive.ugent.be:01J4VGH1DXX9AG3TKK3VBR25ZB 2024-10-06T13:53:18+00:00 Do ingredient and nutrient intake reveal individual dietary specialization in an omnivorous carnivore, the brown bear? De Cuyper, Annelies Strubbe, Diederik Clauss, Marcus Lens, Luc Zedrosser, Andreas Steyaert, Sam M. J. G. Kopatz, Alexander Janssens, Geert Storch, Ilse 2024 application/pdf https://biblio.ugent.be/publication/01J4VGH1DXX9AG3TKK3VBR25ZB http://hdl.handle.net/1854/LU-01J4VGH1DXX9AG3TKK3VBR25ZB https://doi.org/10.1002/wlb3.01305 https://biblio.ugent.be/publication/01J4VGH1DXX9AG3TKK3VBR25ZB/file/01J6F3KQ6706EFG1YBRJ391E7G eng eng Wiley https://biblio.ugent.be/publication/01J4VGH1DXX9AG3TKK3VBR25ZB http://hdl.handle.net/1854/LU-01J4VGH1DXX9AG3TKK3VBR25ZB http://doi.org/10.1002/wlb3.01305 https://biblio.ugent.be/publication/01J4VGH1DXX9AG3TKK3VBR25ZB/file/01J6F3KQ6706EFG1YBRJ391E7G A specific license has been chosen by the rights holder. Get in touch with the rights holder for reuse rights. info:eu-repo/semantics/openAccess WILDLIFE BIOLOGY ISSN: 0909-6396 ISSN: 1903-220X Veterinary Sciences brown bear dietary specialization nutrient URSUS-ARCTOS SALMON PREY CONSUMPTION POPULATION PATTERNS STRATEGY ECOLOGY MASS journalArticle info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion 2024 ftunivgent https://doi.org/10.1002/wlb3.01305 2024-09-11T14:19:03Z Generalist populations often harbor individual dietary specialists. Whether using a narrower set of resources than the population (= specialization) affects specialists' nutrient intake remains underexplored. We evaluated variation in ingredient and nutrient specialization in a European brown bear Ursus arctos population via the Proportional Similarity Index (PSi, from 0 = highly specialized to 1 = not specialized) and assessed associations of specialization with year, season and reproductive class. Different methodologies concerning the organization of raw data for PSi calculations were evaluated (i.e. the resolution of diet compositional data (feces vs the average of all feces per individual) and temporal restrictions for the population (year-round vs within-season). Overall, a tendency for ingredient specialization (PSi 0.37 +/- 0.14) and absence of nutrient specialization (PSi 0.79 +/- 0.10) was observed. Ingredient specialization was mainly influenced by the proportion of berries, graminoids, oats and moose in the diet. Annual, seasonal and reproductive class effects were moderate and did not strongly affect PSi for both ingredients and nutrients. Organizing diet compositional data from a 'feces resolution' to 'individual resolution' decreased specialization. Changing the comparative population in PSi calculations from 'all-year-round' to 'within year and season' also resulted in less pronounced specialization. The degree of specialization was not caused by individuals exhibiting consistent ingredient preferences over the years (low repeatability of PSi) except in spring. Our results suggested absence of nutrient specialization and mild ingredient specialization, which appeared to be an outcome of the ecological circumstances rather than specific individual traits. Additionally, we demonstrated that the methods applied can have substantial influence for the calculation of specialization indices. Article in Journal/Newspaper Ursus arctos Ghent University Academic Bibliography Psi ENVELOPE(-63.000,-63.000,-64.300,-64.300) Wildlife Biology |
institution |
Open Polar |
collection |
Ghent University Academic Bibliography |
op_collection_id |
ftunivgent |
language |
English |
topic |
Veterinary Sciences brown bear dietary specialization nutrient URSUS-ARCTOS SALMON PREY CONSUMPTION POPULATION PATTERNS STRATEGY ECOLOGY MASS |
spellingShingle |
Veterinary Sciences brown bear dietary specialization nutrient URSUS-ARCTOS SALMON PREY CONSUMPTION POPULATION PATTERNS STRATEGY ECOLOGY MASS De Cuyper, Annelies Strubbe, Diederik Clauss, Marcus Lens, Luc Zedrosser, Andreas Steyaert, Sam M. J. G. Kopatz, Alexander Janssens, Geert Do ingredient and nutrient intake reveal individual dietary specialization in an omnivorous carnivore, the brown bear? |
topic_facet |
Veterinary Sciences brown bear dietary specialization nutrient URSUS-ARCTOS SALMON PREY CONSUMPTION POPULATION PATTERNS STRATEGY ECOLOGY MASS |
description |
Generalist populations often harbor individual dietary specialists. Whether using a narrower set of resources than the population (= specialization) affects specialists' nutrient intake remains underexplored. We evaluated variation in ingredient and nutrient specialization in a European brown bear Ursus arctos population via the Proportional Similarity Index (PSi, from 0 = highly specialized to 1 = not specialized) and assessed associations of specialization with year, season and reproductive class. Different methodologies concerning the organization of raw data for PSi calculations were evaluated (i.e. the resolution of diet compositional data (feces vs the average of all feces per individual) and temporal restrictions for the population (year-round vs within-season). Overall, a tendency for ingredient specialization (PSi 0.37 +/- 0.14) and absence of nutrient specialization (PSi 0.79 +/- 0.10) was observed. Ingredient specialization was mainly influenced by the proportion of berries, graminoids, oats and moose in the diet. Annual, seasonal and reproductive class effects were moderate and did not strongly affect PSi for both ingredients and nutrients. Organizing diet compositional data from a 'feces resolution' to 'individual resolution' decreased specialization. Changing the comparative population in PSi calculations from 'all-year-round' to 'within year and season' also resulted in less pronounced specialization. The degree of specialization was not caused by individuals exhibiting consistent ingredient preferences over the years (low repeatability of PSi) except in spring. Our results suggested absence of nutrient specialization and mild ingredient specialization, which appeared to be an outcome of the ecological circumstances rather than specific individual traits. Additionally, we demonstrated that the methods applied can have substantial influence for the calculation of specialization indices. |
author2 |
Storch, Ilse |
format |
Article in Journal/Newspaper |
author |
De Cuyper, Annelies Strubbe, Diederik Clauss, Marcus Lens, Luc Zedrosser, Andreas Steyaert, Sam M. J. G. Kopatz, Alexander Janssens, Geert |
author_facet |
De Cuyper, Annelies Strubbe, Diederik Clauss, Marcus Lens, Luc Zedrosser, Andreas Steyaert, Sam M. J. G. Kopatz, Alexander Janssens, Geert |
author_sort |
De Cuyper, Annelies |
title |
Do ingredient and nutrient intake reveal individual dietary specialization in an omnivorous carnivore, the brown bear? |
title_short |
Do ingredient and nutrient intake reveal individual dietary specialization in an omnivorous carnivore, the brown bear? |
title_full |
Do ingredient and nutrient intake reveal individual dietary specialization in an omnivorous carnivore, the brown bear? |
title_fullStr |
Do ingredient and nutrient intake reveal individual dietary specialization in an omnivorous carnivore, the brown bear? |
title_full_unstemmed |
Do ingredient and nutrient intake reveal individual dietary specialization in an omnivorous carnivore, the brown bear? |
title_sort |
do ingredient and nutrient intake reveal individual dietary specialization in an omnivorous carnivore, the brown bear? |
publisher |
Wiley |
publishDate |
2024 |
url |
https://biblio.ugent.be/publication/01J4VGH1DXX9AG3TKK3VBR25ZB http://hdl.handle.net/1854/LU-01J4VGH1DXX9AG3TKK3VBR25ZB https://doi.org/10.1002/wlb3.01305 https://biblio.ugent.be/publication/01J4VGH1DXX9AG3TKK3VBR25ZB/file/01J6F3KQ6706EFG1YBRJ391E7G |
long_lat |
ENVELOPE(-63.000,-63.000,-64.300,-64.300) |
geographic |
Psi |
geographic_facet |
Psi |
genre |
Ursus arctos |
genre_facet |
Ursus arctos |
op_source |
WILDLIFE BIOLOGY ISSN: 0909-6396 ISSN: 1903-220X |
op_relation |
https://biblio.ugent.be/publication/01J4VGH1DXX9AG3TKK3VBR25ZB http://hdl.handle.net/1854/LU-01J4VGH1DXX9AG3TKK3VBR25ZB http://doi.org/10.1002/wlb3.01305 https://biblio.ugent.be/publication/01J4VGH1DXX9AG3TKK3VBR25ZB/file/01J6F3KQ6706EFG1YBRJ391E7G |
op_rights |
A specific license has been chosen by the rights holder. Get in touch with the rights holder for reuse rights. info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1002/wlb3.01305 |
container_title |
Wildlife Biology |
_version_ |
1812181989234573312 |