Shifting seasonality of annual growth through ontogeny for red deer at northern latitudes
Abstract Large mammals at northern latitudes show annual cycles of body mass gain in summer and body mass loss in winter. The amplitude and seasonal timing of these cycles may vary through ontogeny depending on trade‐offs toward investments in structural growth versus fat storage, reproduction, and...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Wiley
2023-08-01
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| Series: | Ecosphere |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/ecs2.4639 |
| _version_ | 1797733131244011520 |
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| author | Yngvild Vindenes Rolf Langvatn Atle Mysterud |
| author_facet | Yngvild Vindenes Rolf Langvatn Atle Mysterud |
| author_sort | Yngvild Vindenes |
| collection | DOAJ |
| description | Abstract Large mammals at northern latitudes show annual cycles of body mass gain in summer and body mass loss in winter. The amplitude and seasonal timing of these cycles may vary through ontogeny depending on trade‐offs toward investments in structural growth versus fat storage, reproduction, and future survival. Despite this knowledge, there is no detailed model of how the seasonality of body mass develops through ontogeny. Here, we define a new seasonal growth model that accounts for shifting seasonality through two sine components: one included in the growth coefficient and the other on the asymptotic size. We fitted 12 candidate models to longitudinal data on body mass of captive male and female red deer (Cervus elaphus) in Norway, with different baseline growth structures (von Bertalanffy, Gompertz, and Brody) and including zero, one, or both of the seasonal components. The best fitting model was the Brody model with both seasonal components included, allowing the annual peak to shift through ontogeny: The annual peak occurred in December for calves, shifting to November in yearlings, and October in 2‐ and 3‐year‐olds, ending with September for adults. All age classes showed an annual minimum at the end of winter around March. Males and females showed similar seasonal peaks through ontogeny, although males grow bigger and have larger seasonal amplitudes. Our new growth model provides a flexible framework to model seasonal growth changing through ontogeny, applicable to different species. |
| first_indexed | 2024-03-12T12:24:42Z |
| format | Article |
| id | doaj.art-71aff0a5aad247699997d3c97c83ecad |
| institution | Directory Open Access Journal |
| issn | 2150-8925 |
| language | English |
| last_indexed | 2024-03-12T12:24:42Z |
| publishDate | 2023-08-01 |
| publisher | Wiley |
| record_format | Article |
| series | Ecosphere |
| spelling | doaj.art-71aff0a5aad247699997d3c97c83ecad2023-08-30T00:36:33ZengWileyEcosphere2150-89252023-08-01148n/an/a10.1002/ecs2.4639Shifting seasonality of annual growth through ontogeny for red deer at northern latitudesYngvild Vindenes0Rolf Langvatn1Atle Mysterud2Centre for Ecological and Evolutionary Synthesis (CEES), Department of Biosciences University of Oslo Oslo NorwayIndependent Researcher Trondheim NorwayCentre for Ecological and Evolutionary Synthesis (CEES), Department of Biosciences University of Oslo Oslo NorwayAbstract Large mammals at northern latitudes show annual cycles of body mass gain in summer and body mass loss in winter. The amplitude and seasonal timing of these cycles may vary through ontogeny depending on trade‐offs toward investments in structural growth versus fat storage, reproduction, and future survival. Despite this knowledge, there is no detailed model of how the seasonality of body mass develops through ontogeny. Here, we define a new seasonal growth model that accounts for shifting seasonality through two sine components: one included in the growth coefficient and the other on the asymptotic size. We fitted 12 candidate models to longitudinal data on body mass of captive male and female red deer (Cervus elaphus) in Norway, with different baseline growth structures (von Bertalanffy, Gompertz, and Brody) and including zero, one, or both of the seasonal components. The best fitting model was the Brody model with both seasonal components included, allowing the annual peak to shift through ontogeny: The annual peak occurred in December for calves, shifting to November in yearlings, and October in 2‐ and 3‐year‐olds, ending with September for adults. All age classes showed an annual minimum at the end of winter around March. Males and females showed similar seasonal peaks through ontogeny, although males grow bigger and have larger seasonal amplitudes. Our new growth model provides a flexible framework to model seasonal growth changing through ontogeny, applicable to different species.https://doi.org/10.1002/ecs2.4639BrodyGompertzgrowth modelontogenetic shiftred deerseasonal growth |
| spellingShingle | Yngvild Vindenes Rolf Langvatn Atle Mysterud Shifting seasonality of annual growth through ontogeny for red deer at northern latitudes Ecosphere Brody Gompertz growth model ontogenetic shift red deer seasonal growth |
| title | Shifting seasonality of annual growth through ontogeny for red deer at northern latitudes |
| title_full | Shifting seasonality of annual growth through ontogeny for red deer at northern latitudes |
| title_fullStr | Shifting seasonality of annual growth through ontogeny for red deer at northern latitudes |
| title_full_unstemmed | Shifting seasonality of annual growth through ontogeny for red deer at northern latitudes |
| title_short | Shifting seasonality of annual growth through ontogeny for red deer at northern latitudes |
| title_sort | shifting seasonality of annual growth through ontogeny for red deer at northern latitudes |
| topic | Brody Gompertz growth model ontogenetic shift red deer seasonal growth |
| url | https://doi.org/10.1002/ecs2.4639 |
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