The demographic consequences of growing older and bigger in oyster populations
Structured population models, particularly size-or age-structured, have a long history of informing conservation and natural resource management. While size is often easier to measure than age and is the focus of many management strategies, age-structure can have important effects on population dyna...
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ftwilliammarycol:oai:scholarworks.wm.edu:vimsarticles-2745 2023-06-11T04:11:11+02:00 The demographic consequences of growing older and bigger in oyster populations Moore, JL Lipcius, Rom Puckettt, B Schrieber, SJ 2016-08-01T07:00:00Z application/pdf https://scholarworks.wm.edu/vimsarticles/1746 doi: 10.1002/eap.1374 https://scholarworks.wm.edu/context/vimsarticles/article/2745/viewcontent/Moore2016.pdf unknown W&M ScholarWorks https://scholarworks.wm.edu/vimsarticles/1746 doi: 10.1002/eap.1374 https://scholarworks.wm.edu/context/vimsarticles/article/2745/viewcontent/Moore2016.pdf VIMS Articles Fisheries Science Peer-Reviewed Articles Ecology and Evolutionary Biology Marine Biology text 2016 ftwilliammarycol https://doi.org/10.1002/eap.1374 2023-05-04T17:49:02Z Structured population models, particularly size-or age-structured, have a long history of informing conservation and natural resource management. While size is often easier to measure than age and is the focus of many management strategies, age-structure can have important effects on population dynamics that are not captured in size-only models. However, relatively few studies have included the simultaneous effects of both age-and size-structure. To better understand how population structure, particularly that of age and size, impacts restoration and management decisions, we developed and compared a size-structured integral projection model (IPM) and an age-and size-structured IPM, using a population of Crassostrea gigas oysters in the northeastern Pacific Ocean. We analyzed sensitivity of model results across values of local retention that give populations decreasing in size to populations increasing in size. We found that age-and size-structured models yielded the best fit to the demographic data and provided more reliable results about long-term demography. Elasticity analysis showed that population growth rate was most sensitive to changes in the survival of both large (>175 mm shell length) and small (length) oysters, indicating that a maximum size limit, in addition to a minimum size limit, could be an effective strategy for maintaining a sustainable population. In contrast, the purely size-structured model did not detect the importance of large individuals. Finally, patterns in stable age and stable size distributions differed between populations decreasing in size due to limited local retention and populations increasing in size due to high local retention. These patterns can be used to determine population status and restoration success. The methodology described here provides general insight into the necessity of including both age-and size-structure into modeling frameworks when using population models to inform restoration and management decisions. Text Crassostrea gigas W&M ScholarWorks Pacific Ecological Applications 26 7 2206 2217 |
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Open Polar |
collection |
W&M ScholarWorks |
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ftwilliammarycol |
language |
unknown |
topic |
Fisheries Science Peer-Reviewed Articles Ecology and Evolutionary Biology Marine Biology |
spellingShingle |
Fisheries Science Peer-Reviewed Articles Ecology and Evolutionary Biology Marine Biology Moore, JL Lipcius, Rom Puckettt, B Schrieber, SJ The demographic consequences of growing older and bigger in oyster populations |
topic_facet |
Fisheries Science Peer-Reviewed Articles Ecology and Evolutionary Biology Marine Biology |
description |
Structured population models, particularly size-or age-structured, have a long history of informing conservation and natural resource management. While size is often easier to measure than age and is the focus of many management strategies, age-structure can have important effects on population dynamics that are not captured in size-only models. However, relatively few studies have included the simultaneous effects of both age-and size-structure. To better understand how population structure, particularly that of age and size, impacts restoration and management decisions, we developed and compared a size-structured integral projection model (IPM) and an age-and size-structured IPM, using a population of Crassostrea gigas oysters in the northeastern Pacific Ocean. We analyzed sensitivity of model results across values of local retention that give populations decreasing in size to populations increasing in size. We found that age-and size-structured models yielded the best fit to the demographic data and provided more reliable results about long-term demography. Elasticity analysis showed that population growth rate was most sensitive to changes in the survival of both large (>175 mm shell length) and small (length) oysters, indicating that a maximum size limit, in addition to a minimum size limit, could be an effective strategy for maintaining a sustainable population. In contrast, the purely size-structured model did not detect the importance of large individuals. Finally, patterns in stable age and stable size distributions differed between populations decreasing in size due to limited local retention and populations increasing in size due to high local retention. These patterns can be used to determine population status and restoration success. The methodology described here provides general insight into the necessity of including both age-and size-structure into modeling frameworks when using population models to inform restoration and management decisions. |
format |
Text |
author |
Moore, JL Lipcius, Rom Puckettt, B Schrieber, SJ |
author_facet |
Moore, JL Lipcius, Rom Puckettt, B Schrieber, SJ |
author_sort |
Moore, JL |
title |
The demographic consequences of growing older and bigger in oyster populations |
title_short |
The demographic consequences of growing older and bigger in oyster populations |
title_full |
The demographic consequences of growing older and bigger in oyster populations |
title_fullStr |
The demographic consequences of growing older and bigger in oyster populations |
title_full_unstemmed |
The demographic consequences of growing older and bigger in oyster populations |
title_sort |
demographic consequences of growing older and bigger in oyster populations |
publisher |
W&M ScholarWorks |
publishDate |
2016 |
url |
https://scholarworks.wm.edu/vimsarticles/1746 https://scholarworks.wm.edu/context/vimsarticles/article/2745/viewcontent/Moore2016.pdf |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Crassostrea gigas |
genre_facet |
Crassostrea gigas |
op_source |
VIMS Articles |
op_relation |
https://scholarworks.wm.edu/vimsarticles/1746 doi: 10.1002/eap.1374 https://scholarworks.wm.edu/context/vimsarticles/article/2745/viewcontent/Moore2016.pdf |
op_doi |
https://doi.org/10.1002/eap.1374 |
container_title |
Ecological Applications |
container_volume |
26 |
container_issue |
7 |
container_start_page |
2206 |
op_container_end_page |
2217 |
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1768386089989439488 |