Carbon and oxygen stable isotopes of freshwater fish otoliths from the São Francisco River, northeastern Brazil
Autor(a) principal: | |
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Data de Publicação: | 2021 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Anais da Academia Brasileira de Ciências (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652021000101215 |
Resumo: | Abstract Fish otoliths store geochemical and isotopic signatures that can be used as proxies for environmental conditions in ecological investigations. We investigated the δ13C and δ18O of otoliths of four freshwater fish species (Astronotus ocellatus, Serrasalmus brandtii, Plagioscion squamosissimus, and Cichla ocellaris) from the Moxotó Reservoir in the São Francisco River, Brazil. The enriched δ13C signatures that distinguish A. ocellatus from other species could be caused by dissolved inorganic carbon (δ13CDIC) in reservoir waters. Macrophytes growing along the reservoir margins would favor photosynthetic uptake of 12C, leading to enriched δ13CDIC incorporated into the otoliths of those fish. Otolith δ18O signatures appear to reflect water column preferences, in which species preferentially inhabiting surface waters (such as S. Brandtii) show more enriched values (due to high surface evaporation ratios), while bottom water species show depleted δ18O values. Our results represent the first investigation of the isotopic compositions of fish otoliths in freshwater environments in the São Francisco River, and shed light on the interpretation of isotopic information stored in otoliths and how they can be used to infer the ecological strategies of freshwater fish. |
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Carbon and oxygen stable isotopes of freshwater fish otoliths from the São Francisco River, northeastern BrazilBiogeochemistryfreshwater ecologyisotopic ecologyotolith chemistryAbstract Fish otoliths store geochemical and isotopic signatures that can be used as proxies for environmental conditions in ecological investigations. We investigated the δ13C and δ18O of otoliths of four freshwater fish species (Astronotus ocellatus, Serrasalmus brandtii, Plagioscion squamosissimus, and Cichla ocellaris) from the Moxotó Reservoir in the São Francisco River, Brazil. The enriched δ13C signatures that distinguish A. ocellatus from other species could be caused by dissolved inorganic carbon (δ13CDIC) in reservoir waters. Macrophytes growing along the reservoir margins would favor photosynthetic uptake of 12C, leading to enriched δ13CDIC incorporated into the otoliths of those fish. Otolith δ18O signatures appear to reflect water column preferences, in which species preferentially inhabiting surface waters (such as S. Brandtii) show more enriched values (due to high surface evaporation ratios), while bottom water species show depleted δ18O values. Our results represent the first investigation of the isotopic compositions of fish otoliths in freshwater environments in the São Francisco River, and shed light on the interpretation of isotopic information stored in otoliths and how they can be used to infer the ecological strategies of freshwater fish.Academia Brasileira de Ciências2021-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652021000101215Anais da Academia Brasileira de Ciências v.93 n.1 2021reponame:Anais da Academia Brasileira de Ciências (Online)instname:Academia Brasileira de Ciências (ABC)instacron:ABC10.1590/0001-3765202120191050info:eu-repo/semantics/openAccessPEREIRA,NATAN S.SIAL,ALCIDES N.PINHEIRO,PATRÍCIA B.FREITAS,FABRÍCIO L.SILVA,ADRIANA M.C.eng2021-03-16T00:00:00Zoai:scielo:S0001-37652021000101215Revistahttp://www.scielo.br/aabchttps://old.scielo.br/oai/scielo-oai.php||aabc@abc.org.br1678-26900001-3765opendoar:2021-03-16T00:00Anais da Academia Brasileira de Ciências (Online) - Academia Brasileira de Ciências (ABC)false |
dc.title.none.fl_str_mv |
Carbon and oxygen stable isotopes of freshwater fish otoliths from the São Francisco River, northeastern Brazil |
title |
Carbon and oxygen stable isotopes of freshwater fish otoliths from the São Francisco River, northeastern Brazil |
spellingShingle |
Carbon and oxygen stable isotopes of freshwater fish otoliths from the São Francisco River, northeastern Brazil PEREIRA,NATAN S. Biogeochemistry freshwater ecology isotopic ecology otolith chemistry |
title_short |
Carbon and oxygen stable isotopes of freshwater fish otoliths from the São Francisco River, northeastern Brazil |
title_full |
Carbon and oxygen stable isotopes of freshwater fish otoliths from the São Francisco River, northeastern Brazil |
title_fullStr |
Carbon and oxygen stable isotopes of freshwater fish otoliths from the São Francisco River, northeastern Brazil |
title_full_unstemmed |
Carbon and oxygen stable isotopes of freshwater fish otoliths from the São Francisco River, northeastern Brazil |
title_sort |
Carbon and oxygen stable isotopes of freshwater fish otoliths from the São Francisco River, northeastern Brazil |
author |
PEREIRA,NATAN S. |
author_facet |
PEREIRA,NATAN S. SIAL,ALCIDES N. PINHEIRO,PATRÍCIA B. FREITAS,FABRÍCIO L. SILVA,ADRIANA M.C. |
author_role |
author |
author2 |
SIAL,ALCIDES N. PINHEIRO,PATRÍCIA B. FREITAS,FABRÍCIO L. SILVA,ADRIANA M.C. |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
PEREIRA,NATAN S. SIAL,ALCIDES N. PINHEIRO,PATRÍCIA B. FREITAS,FABRÍCIO L. SILVA,ADRIANA M.C. |
dc.subject.por.fl_str_mv |
Biogeochemistry freshwater ecology isotopic ecology otolith chemistry |
topic |
Biogeochemistry freshwater ecology isotopic ecology otolith chemistry |
description |
Abstract Fish otoliths store geochemical and isotopic signatures that can be used as proxies for environmental conditions in ecological investigations. We investigated the δ13C and δ18O of otoliths of four freshwater fish species (Astronotus ocellatus, Serrasalmus brandtii, Plagioscion squamosissimus, and Cichla ocellaris) from the Moxotó Reservoir in the São Francisco River, Brazil. The enriched δ13C signatures that distinguish A. ocellatus from other species could be caused by dissolved inorganic carbon (δ13CDIC) in reservoir waters. Macrophytes growing along the reservoir margins would favor photosynthetic uptake of 12C, leading to enriched δ13CDIC incorporated into the otoliths of those fish. Otolith δ18O signatures appear to reflect water column preferences, in which species preferentially inhabiting surface waters (such as S. Brandtii) show more enriched values (due to high surface evaporation ratios), while bottom water species show depleted δ18O values. Our results represent the first investigation of the isotopic compositions of fish otoliths in freshwater environments in the São Francisco River, and shed light on the interpretation of isotopic information stored in otoliths and how they can be used to infer the ecological strategies of freshwater fish. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-01-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652021000101215 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652021000101215 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/0001-3765202120191050 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Academia Brasileira de Ciências |
publisher.none.fl_str_mv |
Academia Brasileira de Ciências |
dc.source.none.fl_str_mv |
Anais da Academia Brasileira de Ciências v.93 n.1 2021 reponame:Anais da Academia Brasileira de Ciências (Online) instname:Academia Brasileira de Ciências (ABC) instacron:ABC |
instname_str |
Academia Brasileira de Ciências (ABC) |
instacron_str |
ABC |
institution |
ABC |
reponame_str |
Anais da Academia Brasileira de Ciências (Online) |
collection |
Anais da Academia Brasileira de Ciências (Online) |
repository.name.fl_str_mv |
Anais da Academia Brasileira de Ciências (Online) - Academia Brasileira de Ciências (ABC) |
repository.mail.fl_str_mv |
||aabc@abc.org.br |
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1754302869718171648 |