Patterns of age-related change in reproductive effort differ in the pre-natal and post-natal periods in a long-lived mammal.
Age-related changes in maternal reproductive allocation for long-lived species are a key prediction from life-history theory. Theoretical and empirical work suggests that allocation may increase with age due to constraint (increases with experience) or restraint (increases with age in the face of de...
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ftmontanastateu:oai:scholarworks.montana.edu:1/12823 2023-05-15T18:43:22+02:00 Patterns of age-related change in reproductive effort differ in the pre-natal and post-natal periods in a long-lived mammal. Paterson, J. Terrill Rotella, Jay J. Mannas, Jennifer M. Garrott, Robert A. 2016-09 application/pdf https://scholarworks.montana.edu/xmlui/handle/1/12823 en_US eng Paterson, John T, Jay J Rotella, Jennifer M Mannas, and Robert A Garrott. "Patterns of age-related change in reproductive effort differ in the pre-natal and post-natal periods in a long-lived mammal." Journal of Animal Ecology 85, no. 6 (September 2016): 1540-1551. DOI:https://dx.doi.org/10.1111/1365-2656.12577. 0021-8790 https://scholarworks.montana.edu/xmlui/handle/1/12823 This is the peer reviewed version of the following article: Paterson, John T, Jay J Rotella, Jennifer M Mannas, and Robert A Garrott. "Patterns of age-related change in reproductive effort differ in the pre-natal and post-natal periods in a long-lived mammal." Journal of Animal Ecology 85, no. 6 (September 2016): 1540-1551. DOI:https://dx.doi.org/10.1111/1365-2656.12577, which has been published in final form at https://dx.doi.org/10.1111/1365-2656.12577. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving. Article 2016 ftmontanastateu https://doi.org/10.1111/1365-2656.12577 2022-06-06T07:29:18Z Age-related changes in maternal reproductive allocation for long-lived species are a key prediction from life-history theory. Theoretical and empirical work suggests that allocation may increase with age due to constraint (increases with experience) or restraint (increases with age in the face of declining residual reproductive value), and may decrease among the oldest aged animals due to senescence in reproductive function. Here, we use a hierarchical modelling approach to investigate the age-related patterns of change in maternal reproductive effort in the Weddell seal, a long-lived marine mammal with a protracted period of maternal care during which mothers allocate a large proportion of body mass while feeding little. We find that maternal allocation increases with age for young mothers during both the pre-natal and post-natal periods. In contrast, older mothers demonstrate a senescent decline in pre-natal allocation but allocate more of their declining resources to their offspring during the post-natal period. We also find strong evidence for the importance of individual effects in reproductive allocation among mothers: some mothers consistently produce heavier (or lighter) pups than expected. Our results indicate that maternal allocation changes over a mother\'s reproductive life span and that age-specific differences differ in notable ways in pre-natal and post-natal periods. National Science Foundation (ANT-1141326) Article in Journal/Newspaper Weddell Seal Montana State University (MSU): ScholarWorks Weddell Journal of Animal Ecology 85 6 1540 1551 |
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Open Polar |
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Montana State University (MSU): ScholarWorks |
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ftmontanastateu |
language |
English |
description |
Age-related changes in maternal reproductive allocation for long-lived species are a key prediction from life-history theory. Theoretical and empirical work suggests that allocation may increase with age due to constraint (increases with experience) or restraint (increases with age in the face of declining residual reproductive value), and may decrease among the oldest aged animals due to senescence in reproductive function. Here, we use a hierarchical modelling approach to investigate the age-related patterns of change in maternal reproductive effort in the Weddell seal, a long-lived marine mammal with a protracted period of maternal care during which mothers allocate a large proportion of body mass while feeding little. We find that maternal allocation increases with age for young mothers during both the pre-natal and post-natal periods. In contrast, older mothers demonstrate a senescent decline in pre-natal allocation but allocate more of their declining resources to their offspring during the post-natal period. We also find strong evidence for the importance of individual effects in reproductive allocation among mothers: some mothers consistently produce heavier (or lighter) pups than expected. Our results indicate that maternal allocation changes over a mother\'s reproductive life span and that age-specific differences differ in notable ways in pre-natal and post-natal periods. National Science Foundation (ANT-1141326) |
format |
Article in Journal/Newspaper |
author |
Paterson, J. Terrill Rotella, Jay J. Mannas, Jennifer M. Garrott, Robert A. |
spellingShingle |
Paterson, J. Terrill Rotella, Jay J. Mannas, Jennifer M. Garrott, Robert A. Patterns of age-related change in reproductive effort differ in the pre-natal and post-natal periods in a long-lived mammal. |
author_facet |
Paterson, J. Terrill Rotella, Jay J. Mannas, Jennifer M. Garrott, Robert A. |
author_sort |
Paterson, J. Terrill |
title |
Patterns of age-related change in reproductive effort differ in the pre-natal and post-natal periods in a long-lived mammal. |
title_short |
Patterns of age-related change in reproductive effort differ in the pre-natal and post-natal periods in a long-lived mammal. |
title_full |
Patterns of age-related change in reproductive effort differ in the pre-natal and post-natal periods in a long-lived mammal. |
title_fullStr |
Patterns of age-related change in reproductive effort differ in the pre-natal and post-natal periods in a long-lived mammal. |
title_full_unstemmed |
Patterns of age-related change in reproductive effort differ in the pre-natal and post-natal periods in a long-lived mammal. |
title_sort |
patterns of age-related change in reproductive effort differ in the pre-natal and post-natal periods in a long-lived mammal. |
publishDate |
2016 |
url |
https://scholarworks.montana.edu/xmlui/handle/1/12823 |
geographic |
Weddell |
geographic_facet |
Weddell |
genre |
Weddell Seal |
genre_facet |
Weddell Seal |
op_relation |
Paterson, John T, Jay J Rotella, Jennifer M Mannas, and Robert A Garrott. "Patterns of age-related change in reproductive effort differ in the pre-natal and post-natal periods in a long-lived mammal." Journal of Animal Ecology 85, no. 6 (September 2016): 1540-1551. DOI:https://dx.doi.org/10.1111/1365-2656.12577. 0021-8790 https://scholarworks.montana.edu/xmlui/handle/1/12823 |
op_rights |
This is the peer reviewed version of the following article: Paterson, John T, Jay J Rotella, Jennifer M Mannas, and Robert A Garrott. "Patterns of age-related change in reproductive effort differ in the pre-natal and post-natal periods in a long-lived mammal." Journal of Animal Ecology 85, no. 6 (September 2016): 1540-1551. DOI:https://dx.doi.org/10.1111/1365-2656.12577, which has been published in final form at https://dx.doi.org/10.1111/1365-2656.12577. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving. |
op_doi |
https://doi.org/10.1111/1365-2656.12577 |
container_title |
Journal of Animal Ecology |
container_volume |
85 |
container_issue |
6 |
container_start_page |
1540 |
op_container_end_page |
1551 |
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