Data from: 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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ftdryad:oai:v1.datadryad.org:10255/dryad.121522 2023-05-15T13:31:23+02:00 Data from: Patterns of age-related change in reproductive effort differ in the pre-natal and post-natal periods in a long-lived mammal Paterson, John T. Rotella, Jay J. Mannas, Jennifer M. Garrott, Robert A. Antarctica Ross Sea Holocene 2016-07-26T16:58:53Z http://hdl.handle.net/10255/dryad.121522 https://doi.org/10.5061/dryad.tk5ph unknown doi:10.5061/dryad.tk5ph/1 doi:10.5061/dryad.tk5ph/2 doi:10.1111/1365-2656.12577 PMID:27448960 doi:10.5061/dryad.tk5ph Paterson JT, Rotella JJ, Mannas JM, Garrott RA (2016) 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(6): 1540–1551. 0021-8790 http://hdl.handle.net/10255/dryad.121522 senescence terminal allocation reproductive allocation Weddell seal Article 2016 ftdryad https://doi.org/10.5061/dryad.tk5ph https://doi.org/10.5061/dryad.tk5ph/1 https://doi.org/10.5061/dryad.tk5ph/2 https://doi.org/10.1111/1365-2656.12577 2020-01-01T15:37:54Z 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. Article in Journal/Newspaper Antarc* Antarctica Ross Sea Weddell Seal Dryad Digital Repository (Duke University) Ross Sea Weddell |
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Open Polar |
collection |
Dryad Digital Repository (Duke University) |
op_collection_id |
ftdryad |
language |
unknown |
topic |
senescence terminal allocation reproductive allocation Weddell seal |
spellingShingle |
senescence terminal allocation reproductive allocation Weddell seal Paterson, John T. Rotella, Jay J. Mannas, Jennifer M. Garrott, Robert A. Data from: Patterns of age-related change in reproductive effort differ in the pre-natal and post-natal periods in a long-lived mammal |
topic_facet |
senescence terminal allocation reproductive allocation Weddell seal |
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. |
format |
Article in Journal/Newspaper |
author |
Paterson, John T. Rotella, Jay J. Mannas, Jennifer M. Garrott, Robert A. |
author_facet |
Paterson, John T. Rotella, Jay J. Mannas, Jennifer M. Garrott, Robert A. |
author_sort |
Paterson, John T. |
title |
Data from: Patterns of age-related change in reproductive effort differ in the pre-natal and post-natal periods in a long-lived mammal |
title_short |
Data from: Patterns of age-related change in reproductive effort differ in the pre-natal and post-natal periods in a long-lived mammal |
title_full |
Data from: Patterns of age-related change in reproductive effort differ in the pre-natal and post-natal periods in a long-lived mammal |
title_fullStr |
Data from: 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 |
Data from: Patterns of age-related change in reproductive effort differ in the pre-natal and post-natal periods in a long-lived mammal |
title_sort |
data from: 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 |
http://hdl.handle.net/10255/dryad.121522 https://doi.org/10.5061/dryad.tk5ph |
op_coverage |
Antarctica Ross Sea Holocene |
geographic |
Ross Sea Weddell |
geographic_facet |
Ross Sea Weddell |
genre |
Antarc* Antarctica Ross Sea Weddell Seal |
genre_facet |
Antarc* Antarctica Ross Sea Weddell Seal |
op_relation |
doi:10.5061/dryad.tk5ph/1 doi:10.5061/dryad.tk5ph/2 doi:10.1111/1365-2656.12577 PMID:27448960 doi:10.5061/dryad.tk5ph Paterson JT, Rotella JJ, Mannas JM, Garrott RA (2016) 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(6): 1540–1551. 0021-8790 http://hdl.handle.net/10255/dryad.121522 |
op_doi |
https://doi.org/10.5061/dryad.tk5ph https://doi.org/10.5061/dryad.tk5ph/1 https://doi.org/10.5061/dryad.tk5ph/2 https://doi.org/10.1111/1365-2656.12577 |
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