Density-dependent habitat use and growth of an estuarine fish
Density dependence can stabilize or destabilize population size through negative or positive feedback controls operating over different spatial and temporal scales. While many species have been shown to exhibit density dependence, the topic has received little attention in estuaries where environmen...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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Canadian Science Publishing
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crcansciencepubl:10.1139/f2012-098 2024-09-09T20:05:08+00:00 Density-dependent habitat use and growth of an estuarine fish Bacheler, Nathan M. Buckel, Jeffrey A. Paramore, Lee M. Rochet, Marie-Joëlle 2012 http://dx.doi.org/10.1139/f2012-098 http://www.nrcresearchpress.com/doi/full-xml/10.1139/f2012-098 http://www.nrcresearchpress.com/doi/pdf/10.1139/f2012-098 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 69, issue 11, page 1734-1747 ISSN 0706-652X 1205-7533 journal-article 2012 crcansciencepubl https://doi.org/10.1139/f2012-098 2024-08-01T04:10:04Z Density dependence can stabilize or destabilize population size through negative or positive feedback controls operating over different spatial and temporal scales. While many species have been shown to exhibit density dependence, the topic has received little attention in estuaries where environmental variability and larval supply are often considered to be the primary drivers of population dynamics. We used multiple long-term, fishery-independent data sets and a unique modeling approach to test the hypothesis that juvenile red drum ( Sciaenops ocellatus ) exhibit density-dependent habitat use and growth rates in estuaries in North Carolina, USA. Age-1 red drum exhibited density-dependent habitat use after accounting for environmental and landscape variables, disproportionately increasing northward and coastward in the study area at high abundance. Apparent individual growth rates of age-0 and age-1 red drum were generally negatively related to the abundance of their own age classes, but evidence of density-dependent growth rates for age-2 red drum was weak to nonexistent. Changes in spatial distribution of red drum when overall abundance was high did not overcome density-dependent effects on individual growth rates. Thus, density-dependent effects have potential negative feedbacks on population growth in estuaries and should not be ignored in future theoretical or empirical estuarine studies. Article in Journal/Newspaper Red drum Sciaenops ocellatus Canadian Science Publishing Canadian Journal of Fisheries and Aquatic Sciences 69 11 1734 1747 |
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Open Polar |
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Canadian Science Publishing |
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crcansciencepubl |
language |
English |
description |
Density dependence can stabilize or destabilize population size through negative or positive feedback controls operating over different spatial and temporal scales. While many species have been shown to exhibit density dependence, the topic has received little attention in estuaries where environmental variability and larval supply are often considered to be the primary drivers of population dynamics. We used multiple long-term, fishery-independent data sets and a unique modeling approach to test the hypothesis that juvenile red drum ( Sciaenops ocellatus ) exhibit density-dependent habitat use and growth rates in estuaries in North Carolina, USA. Age-1 red drum exhibited density-dependent habitat use after accounting for environmental and landscape variables, disproportionately increasing northward and coastward in the study area at high abundance. Apparent individual growth rates of age-0 and age-1 red drum were generally negatively related to the abundance of their own age classes, but evidence of density-dependent growth rates for age-2 red drum was weak to nonexistent. Changes in spatial distribution of red drum when overall abundance was high did not overcome density-dependent effects on individual growth rates. Thus, density-dependent effects have potential negative feedbacks on population growth in estuaries and should not be ignored in future theoretical or empirical estuarine studies. |
author2 |
Rochet, Marie-Joëlle |
format |
Article in Journal/Newspaper |
author |
Bacheler, Nathan M. Buckel, Jeffrey A. Paramore, Lee M. |
spellingShingle |
Bacheler, Nathan M. Buckel, Jeffrey A. Paramore, Lee M. Density-dependent habitat use and growth of an estuarine fish |
author_facet |
Bacheler, Nathan M. Buckel, Jeffrey A. Paramore, Lee M. |
author_sort |
Bacheler, Nathan M. |
title |
Density-dependent habitat use and growth of an estuarine fish |
title_short |
Density-dependent habitat use and growth of an estuarine fish |
title_full |
Density-dependent habitat use and growth of an estuarine fish |
title_fullStr |
Density-dependent habitat use and growth of an estuarine fish |
title_full_unstemmed |
Density-dependent habitat use and growth of an estuarine fish |
title_sort |
density-dependent habitat use and growth of an estuarine fish |
publisher |
Canadian Science Publishing |
publishDate |
2012 |
url |
http://dx.doi.org/10.1139/f2012-098 http://www.nrcresearchpress.com/doi/full-xml/10.1139/f2012-098 http://www.nrcresearchpress.com/doi/pdf/10.1139/f2012-098 |
genre |
Red drum Sciaenops ocellatus |
genre_facet |
Red drum Sciaenops ocellatus |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 69, issue 11, page 1734-1747 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f2012-098 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
69 |
container_issue |
11 |
container_start_page |
1734 |
op_container_end_page |
1747 |
_version_ |
1809937453734166528 |