Temperature affects the hypoxia tolerance of neotropical Cichlid Geophagus brasiliensis
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Neotropical ichthyology (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252018000100202 |
Resumo: | ABSTRACT Oxygen and temperature are the most limiting factors in aquatic environments. Several species are exposed to variations of these factors in water because of physical, chemical and biological processes. The objective of this study was to evaluate the metabolic profile and the tolerance to the hypoxia of Geophagus brasiliensis exposed to changes in temperature and oxygen availability. The fish were exposed to 20 and 90% of oxygen saturation combined with different temperatures (20°, 24° and 28° C) for 8 h. Hepatic and muscular glycogen, as well as the activities of lactate dehydrogenase (LDH), malate dehydrogenase (MDH), citrate synthase (CS) and their ratios were evaluated. Both glycogen and MDH activity showed a significant difference in the liver. While CS showed increased activity only in the heart. The increase in LDH activity in the white muscle shows the importance of the anaerobic pathway as energy source in this tissue. The MDH / LDH ratio increased in all tissues, while CS / LDH increased in the liver and decreased in the heart. Based on the results of the present study it may be concluded that this species used the anaerobic metabolism as the main strategy for hypoxia tolerance. |
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Neotropical ichthyology (Online) |
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Temperature affects the hypoxia tolerance of neotropical Cichlid Geophagus brasiliensisAerobic and anaerobic pathwaysBehaviorMetabolismOxygenABSTRACT Oxygen and temperature are the most limiting factors in aquatic environments. Several species are exposed to variations of these factors in water because of physical, chemical and biological processes. The objective of this study was to evaluate the metabolic profile and the tolerance to the hypoxia of Geophagus brasiliensis exposed to changes in temperature and oxygen availability. The fish were exposed to 20 and 90% of oxygen saturation combined with different temperatures (20°, 24° and 28° C) for 8 h. Hepatic and muscular glycogen, as well as the activities of lactate dehydrogenase (LDH), malate dehydrogenase (MDH), citrate synthase (CS) and their ratios were evaluated. Both glycogen and MDH activity showed a significant difference in the liver. While CS showed increased activity only in the heart. The increase in LDH activity in the white muscle shows the importance of the anaerobic pathway as energy source in this tissue. The MDH / LDH ratio increased in all tissues, while CS / LDH increased in the liver and decreased in the heart. Based on the results of the present study it may be concluded that this species used the anaerobic metabolism as the main strategy for hypoxia tolerance.Sociedade Brasileira de Ictiologia2018-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252018000100202Neotropical Ichthyology v.16 n.1 2018reponame:Neotropical ichthyology (Online)instname:Sociedade Brasileira de Ictiologia (SBI)instacron:SBI10.1590/1982-0224-20170063info:eu-repo/semantics/openAccessPereira,Jéssica A.Veronez,Alexandra C.S.Coppo,Gabriel C.Duca,CharlesChippari-Gomes,Adriana R.Gomes,Levy C.eng2018-03-28T00:00:00Zoai:scielo:S1679-62252018000100202Revistahttp://www.ufrgs.br/ni/https://old.scielo.br/oai/scielo-oai.php||neoichth@nupelia.uem.br1982-02241679-6225opendoar:2018-03-28T00:00Neotropical ichthyology (Online) - Sociedade Brasileira de Ictiologia (SBI)false |
dc.title.none.fl_str_mv |
Temperature affects the hypoxia tolerance of neotropical Cichlid Geophagus brasiliensis |
title |
Temperature affects the hypoxia tolerance of neotropical Cichlid Geophagus brasiliensis |
spellingShingle |
Temperature affects the hypoxia tolerance of neotropical Cichlid Geophagus brasiliensis Pereira,Jéssica A. Aerobic and anaerobic pathways Behavior Metabolism Oxygen |
title_short |
Temperature affects the hypoxia tolerance of neotropical Cichlid Geophagus brasiliensis |
title_full |
Temperature affects the hypoxia tolerance of neotropical Cichlid Geophagus brasiliensis |
title_fullStr |
Temperature affects the hypoxia tolerance of neotropical Cichlid Geophagus brasiliensis |
title_full_unstemmed |
Temperature affects the hypoxia tolerance of neotropical Cichlid Geophagus brasiliensis |
title_sort |
Temperature affects the hypoxia tolerance of neotropical Cichlid Geophagus brasiliensis |
author |
Pereira,Jéssica A. |
author_facet |
Pereira,Jéssica A. Veronez,Alexandra C.S. Coppo,Gabriel C. Duca,Charles Chippari-Gomes,Adriana R. Gomes,Levy C. |
author_role |
author |
author2 |
Veronez,Alexandra C.S. Coppo,Gabriel C. Duca,Charles Chippari-Gomes,Adriana R. Gomes,Levy C. |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
Pereira,Jéssica A. Veronez,Alexandra C.S. Coppo,Gabriel C. Duca,Charles Chippari-Gomes,Adriana R. Gomes,Levy C. |
dc.subject.por.fl_str_mv |
Aerobic and anaerobic pathways Behavior Metabolism Oxygen |
topic |
Aerobic and anaerobic pathways Behavior Metabolism Oxygen |
description |
ABSTRACT Oxygen and temperature are the most limiting factors in aquatic environments. Several species are exposed to variations of these factors in water because of physical, chemical and biological processes. The objective of this study was to evaluate the metabolic profile and the tolerance to the hypoxia of Geophagus brasiliensis exposed to changes in temperature and oxygen availability. The fish were exposed to 20 and 90% of oxygen saturation combined with different temperatures (20°, 24° and 28° C) for 8 h. Hepatic and muscular glycogen, as well as the activities of lactate dehydrogenase (LDH), malate dehydrogenase (MDH), citrate synthase (CS) and their ratios were evaluated. Both glycogen and MDH activity showed a significant difference in the liver. While CS showed increased activity only in the heart. The increase in LDH activity in the white muscle shows the importance of the anaerobic pathway as energy source in this tissue. The MDH / LDH ratio increased in all tissues, while CS / LDH increased in the liver and decreased in the heart. Based on the results of the present study it may be concluded that this species used the anaerobic metabolism as the main strategy for hypoxia tolerance. |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018-01-01 |
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=S1679-62252018000100202 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252018000100202 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/1982-0224-20170063 |
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 |
Sociedade Brasileira de Ictiologia |
publisher.none.fl_str_mv |
Sociedade Brasileira de Ictiologia |
dc.source.none.fl_str_mv |
Neotropical Ichthyology v.16 n.1 2018 reponame:Neotropical ichthyology (Online) instname:Sociedade Brasileira de Ictiologia (SBI) instacron:SBI |
instname_str |
Sociedade Brasileira de Ictiologia (SBI) |
instacron_str |
SBI |
institution |
SBI |
reponame_str |
Neotropical ichthyology (Online) |
collection |
Neotropical ichthyology (Online) |
repository.name.fl_str_mv |
Neotropical ichthyology (Online) - Sociedade Brasileira de Ictiologia (SBI) |
repository.mail.fl_str_mv |
||neoichth@nupelia.uem.br |
_version_ |
1752122182664716288 |