Salinity regulation of copepod egg production in a large microtidal estuary
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Brazilian Journal of Oceanography |
Texto Completo: | https://www.revistas.usp.br/bjoce/article/view/164250 |
Resumo: | Salinity is a key variable for ecological processes in estuaries. Acartia tonsa is a typical estuarine copepod whose responses to salinity have been thoroughly studied in the laboratory. However, results cannot be extrapolated to the field, and formal comparisons between lab and field responses to salinity were not attempted. Here we compare lab-based with field copepod egg production rates (EPR) from the Río de la Plata estuary (RPE), with focus on A. tonsa. Field work was conducted between 2009 and 2011 in the mixing zone of the RPE. Water temperature, salinity and chlorophyll-a varied over ample ranges (temperature: 10.54 - 24.56ºC, salinity: 2.83 - 32.99, chlorophyll-a: 0.62 - 7.27 mg m-3). A. tonsa was the strongly dominant species. EPR ranged between 6.7 and 95.7 eggs female-1 day-1, and correlated to salinity, temperature (weakly), but not to chlorophyll. The relationship between A. tonsa’s EPR (EPRAT) and salinity was consistent with that obtained under laboratory conditions: a humped pattern with a maximum at intermediate salinities. However, differences were also evident, e.g., higher EPRAT was measured in the field. We speculate that discrepancies derive from nutritional differences between field and reference (laboratory) data sets. Besides salinity, food quality and quantity may be first order drivers of A. tonsa’s productivity in the RPE. |
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Brazilian Journal of Oceanography |
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Salinity regulation of copepod egg production in a large microtidal estuaryCopepodsEstuaryAcartia tonsaEgg production rateRío de la PlataSalinity is a key variable for ecological processes in estuaries. Acartia tonsa is a typical estuarine copepod whose responses to salinity have been thoroughly studied in the laboratory. However, results cannot be extrapolated to the field, and formal comparisons between lab and field responses to salinity were not attempted. Here we compare lab-based with field copepod egg production rates (EPR) from the Río de la Plata estuary (RPE), with focus on A. tonsa. Field work was conducted between 2009 and 2011 in the mixing zone of the RPE. Water temperature, salinity and chlorophyll-a varied over ample ranges (temperature: 10.54 - 24.56ºC, salinity: 2.83 - 32.99, chlorophyll-a: 0.62 - 7.27 mg m-3). A. tonsa was the strongly dominant species. EPR ranged between 6.7 and 95.7 eggs female-1 day-1, and correlated to salinity, temperature (weakly), but not to chlorophyll. The relationship between A. tonsa’s EPR (EPRAT) and salinity was consistent with that obtained under laboratory conditions: a humped pattern with a maximum at intermediate salinities. However, differences were also evident, e.g., higher EPRAT was measured in the field. We speculate that discrepancies derive from nutritional differences between field and reference (laboratory) data sets. Besides salinity, food quality and quantity may be first order drivers of A. tonsa’s productivity in the RPE.Universidade de São Paulo. Instituto Oceanográfico2019-11-19info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://www.revistas.usp.br/bjoce/article/view/16425010.1590/s1679-87592019026706708Brazilian Journal of Oceanography; Vol. 67 (2019); e19267Brazilian Journal of Oceanography; v. 67 (2019); e19267Brazilian Journal of Oceanography; Vol. 67 (2019); e192671982-436X1679-8759reponame:Brazilian Journal of Oceanographyinstname:Universidade de São Paulo (USP)instacron:USPenghttps://www.revistas.usp.br/bjoce/article/view/164250/157612Copyright (c) 2019 Brazilian Journal of Oceanographyinfo:eu-repo/semantics/openAccessCalliari, Danilo LuisEspinosa, NoéMartínez, MarianoRodríguez-Graña, Laura M.2020-12-04T18:11:28Zoai:revistas.usp.br:article/164250Revistahttps://www.revistas.usp.br/bjoce/indexPUBhttps://www.revistas.usp.br/bjoce/oaiio@usp.br||io@usp.br1982-436X1679-8759opendoar:2020-12-04T18:11:28Brazilian Journal of Oceanography - Universidade de São Paulo (USP)false |
dc.title.none.fl_str_mv |
Salinity regulation of copepod egg production in a large microtidal estuary |
title |
Salinity regulation of copepod egg production in a large microtidal estuary |
spellingShingle |
Salinity regulation of copepod egg production in a large microtidal estuary Calliari, Danilo Luis Copepods Estuary Acartia tonsa Egg production rate Río de la Plata |
title_short |
Salinity regulation of copepod egg production in a large microtidal estuary |
title_full |
Salinity regulation of copepod egg production in a large microtidal estuary |
title_fullStr |
Salinity regulation of copepod egg production in a large microtidal estuary |
title_full_unstemmed |
Salinity regulation of copepod egg production in a large microtidal estuary |
title_sort |
Salinity regulation of copepod egg production in a large microtidal estuary |
author |
Calliari, Danilo Luis |
author_facet |
Calliari, Danilo Luis Espinosa, Noé Martínez, Mariano Rodríguez-Graña, Laura M. |
author_role |
author |
author2 |
Espinosa, Noé Martínez, Mariano Rodríguez-Graña, Laura M. |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Calliari, Danilo Luis Espinosa, Noé Martínez, Mariano Rodríguez-Graña, Laura M. |
dc.subject.por.fl_str_mv |
Copepods Estuary Acartia tonsa Egg production rate Río de la Plata |
topic |
Copepods Estuary Acartia tonsa Egg production rate Río de la Plata |
description |
Salinity is a key variable for ecological processes in estuaries. Acartia tonsa is a typical estuarine copepod whose responses to salinity have been thoroughly studied in the laboratory. However, results cannot be extrapolated to the field, and formal comparisons between lab and field responses to salinity were not attempted. Here we compare lab-based with field copepod egg production rates (EPR) from the Río de la Plata estuary (RPE), with focus on A. tonsa. Field work was conducted between 2009 and 2011 in the mixing zone of the RPE. Water temperature, salinity and chlorophyll-a varied over ample ranges (temperature: 10.54 - 24.56ºC, salinity: 2.83 - 32.99, chlorophyll-a: 0.62 - 7.27 mg m-3). A. tonsa was the strongly dominant species. EPR ranged between 6.7 and 95.7 eggs female-1 day-1, and correlated to salinity, temperature (weakly), but not to chlorophyll. The relationship between A. tonsa’s EPR (EPRAT) and salinity was consistent with that obtained under laboratory conditions: a humped pattern with a maximum at intermediate salinities. However, differences were also evident, e.g., higher EPRAT was measured in the field. We speculate that discrepancies derive from nutritional differences between field and reference (laboratory) data sets. Besides salinity, food quality and quantity may be first order drivers of A. tonsa’s productivity in the RPE. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019-11-19 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://www.revistas.usp.br/bjoce/article/view/164250 10.1590/s1679-87592019026706708 |
url |
https://www.revistas.usp.br/bjoce/article/view/164250 |
identifier_str_mv |
10.1590/s1679-87592019026706708 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
https://www.revistas.usp.br/bjoce/article/view/164250/157612 |
dc.rights.driver.fl_str_mv |
Copyright (c) 2019 Brazilian Journal of Oceanography info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Copyright (c) 2019 Brazilian Journal of Oceanography |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Universidade de São Paulo. Instituto Oceanográfico |
publisher.none.fl_str_mv |
Universidade de São Paulo. Instituto Oceanográfico |
dc.source.none.fl_str_mv |
Brazilian Journal of Oceanography; Vol. 67 (2019); e19267 Brazilian Journal of Oceanography; v. 67 (2019); e19267 Brazilian Journal of Oceanography; Vol. 67 (2019); e19267 1982-436X 1679-8759 reponame:Brazilian Journal of Oceanography instname:Universidade de São Paulo (USP) instacron:USP |
instname_str |
Universidade de São Paulo (USP) |
instacron_str |
USP |
institution |
USP |
reponame_str |
Brazilian Journal of Oceanography |
collection |
Brazilian Journal of Oceanography |
repository.name.fl_str_mv |
Brazilian Journal of Oceanography - Universidade de São Paulo (USP) |
repository.mail.fl_str_mv |
io@usp.br||io@usp.br |
_version_ |
1800223771858042880 |