Ion fluxes and hematological parameters of two teleosts from the Rio Negro, Amazon, exposed to hypoxia
The aim of this study was to describe the effect of hypoxia on whole body ion fluxes and hematological parameters in two Amazonian teleosts: Serrasalmus eigenmanni and Metynnis hypsauchen. The increase of Na+ and Cl- effluxes on M. hypsauchen exposed to hypoxia may be related to an increase of gill...
| Autor principal: | Baldisserotto, Bernardo |
|---|---|
| Outros Autores: | Chippari-Gomes, Adriana Regina, Lopes, Nilva Pereira, Bicudo, José Eduardo Pereira Wilken, Paula-Silva, Maria Nazaré N., Almeida-Val, Vera Maria Fonseca, Val, Adalberto Luis |
| Grau: | Artigo |
| Idioma: | English |
| Publicado em: |
Revista Brasileira de Biologia
2020
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| Assuntos: | |
| Acesso em linha: |
https://repositorio.inpa.gov.br/handle/1/14826 |
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oai:repositorio:1-14826 |
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oai:repositorio:1-14826 Ion fluxes and hematological parameters of two teleosts from the Rio Negro, Amazon, exposed to hypoxia Baldisserotto, Bernardo Chippari-Gomes, Adriana Regina Lopes, Nilva Pereira Bicudo, José Eduardo Pereira Wilken Paula-Silva, Maria Nazaré N. Almeida-Val, Vera Maria Fonseca Val, Adalberto Luis Potassium Channel Sodium Channel Adaptation Animals Anoxia Blood Fish Metabolism River Adaptation, Physiological Animal Anoxia Fishes Potassium Channels Rivers Sodium Channels Metynnis Hypsauchen Pisces Serrasalmus Eigenmanni Teleostei The aim of this study was to describe the effect of hypoxia on whole body ion fluxes and hematological parameters in two Amazonian teleosts: Serrasalmus eigenmanni and Metynnis hypsauchen. The increase of Na+ and Cl- effluxes on M. hypsauchen exposed to hypoxia may be related to an increase of gill ventilation and effective respiratory surface area, to avoid a reduction in the oxygen uptake, and/or with the decrease of pHe, that could inhibit Na + and Cl- transporters and, therefore, reduce influx of these ions. Effluxes of Na+ and Cl- were lower in hypoxia than in normoxia for S. eigenmanni, possibly because in hypoxia this species would reduce gill ventilation and oxygen uptake, which would lead to a decrease of gill ion efflux and, consequently, reducing ion loss. The increase on hematocrit (Ht) during hypoxia in M. hypsauchen probably was caused by an increase of the red blood cell volume (MCV). For S. eigenmanni the increase on glucose possibly results from the usage of glucose reserve mobilization. Metynnis hypsauchen showed to be more sensitive to hypoxia than Serrasalmus eigenmanni, since the first presented more significant alterations on these osmoregulatory and hematological parameters. Nevertheless, the alterations observed for both species are strategies adopted by fishes to preserve oxygen supply to metabolizing tissues during exposure to hypoxia. 2020-04-24T17:09:51Z 2020-04-24T17:09:51Z 2008 Artigo https://repositorio.inpa.gov.br/handle/1/14826 10.1590/S1519-69842008000300015 en Volume 68, Número 3, Pags. 571-575 Attribution-NonCommercial-NoDerivs 3.0 Brazil http://creativecommons.org/licenses/by-nc-nd/3.0/br/ application/pdf Revista Brasileira de Biologia |
| institution |
Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional |
| collection |
INPA-RI |
| language |
English |
| topic |
Potassium Channel Sodium Channel Adaptation Animals Anoxia Blood Fish Metabolism River Adaptation, Physiological Animal Anoxia Fishes Potassium Channels Rivers Sodium Channels Metynnis Hypsauchen Pisces Serrasalmus Eigenmanni Teleostei |
| spellingShingle |
Potassium Channel Sodium Channel Adaptation Animals Anoxia Blood Fish Metabolism River Adaptation, Physiological Animal Anoxia Fishes Potassium Channels Rivers Sodium Channels Metynnis Hypsauchen Pisces Serrasalmus Eigenmanni Teleostei Baldisserotto, Bernardo Ion fluxes and hematological parameters of two teleosts from the Rio Negro, Amazon, exposed to hypoxia |
| topic_facet |
Potassium Channel Sodium Channel Adaptation Animals Anoxia Blood Fish Metabolism River Adaptation, Physiological Animal Anoxia Fishes Potassium Channels Rivers Sodium Channels Metynnis Hypsauchen Pisces Serrasalmus Eigenmanni Teleostei |
| description |
The aim of this study was to describe the effect of hypoxia on whole body ion fluxes and hematological parameters in two Amazonian teleosts: Serrasalmus eigenmanni and Metynnis hypsauchen. The increase of Na+ and Cl- effluxes on M. hypsauchen exposed to hypoxia may be related to an increase of gill ventilation and effective respiratory surface area, to avoid a reduction in the oxygen uptake, and/or with the decrease of pHe, that could inhibit Na + and Cl- transporters and, therefore, reduce influx of these ions. Effluxes of Na+ and Cl- were lower in hypoxia than in normoxia for S. eigenmanni, possibly because in hypoxia this species would reduce gill ventilation and oxygen uptake, which would lead to a decrease of gill ion efflux and, consequently, reducing ion loss. The increase on hematocrit (Ht) during hypoxia in M. hypsauchen probably was caused by an increase of the red blood cell volume (MCV). For S. eigenmanni the increase on glucose possibly results from the usage of glucose reserve mobilization. Metynnis hypsauchen showed to be more sensitive to hypoxia than Serrasalmus eigenmanni, since the first presented more significant alterations on these osmoregulatory and hematological parameters. Nevertheless, the alterations observed for both species are strategies adopted by fishes to preserve oxygen supply to metabolizing tissues during exposure to hypoxia. |
| format |
Artigo |
| author |
Baldisserotto, Bernardo |
| author2 |
Chippari-Gomes, Adriana Regina Lopes, Nilva Pereira Bicudo, José Eduardo Pereira Wilken Paula-Silva, Maria Nazaré N. Almeida-Val, Vera Maria Fonseca Val, Adalberto Luis |
| author2Str |
Chippari-Gomes, Adriana Regina Lopes, Nilva Pereira Bicudo, José Eduardo Pereira Wilken Paula-Silva, Maria Nazaré N. Almeida-Val, Vera Maria Fonseca Val, Adalberto Luis |
| title |
Ion fluxes and hematological parameters of two teleosts from the Rio Negro, Amazon, exposed to hypoxia |
| title_short |
Ion fluxes and hematological parameters of two teleosts from the Rio Negro, Amazon, exposed to hypoxia |
| title_full |
Ion fluxes and hematological parameters of two teleosts from the Rio Negro, Amazon, exposed to hypoxia |
| title_fullStr |
Ion fluxes and hematological parameters of two teleosts from the Rio Negro, Amazon, exposed to hypoxia |
| title_full_unstemmed |
Ion fluxes and hematological parameters of two teleosts from the Rio Negro, Amazon, exposed to hypoxia |
| title_sort |
ion fluxes and hematological parameters of two teleosts from the rio negro, amazon, exposed to hypoxia |
| publisher |
Revista Brasileira de Biologia |
| publishDate |
2020 |
| url |
https://repositorio.inpa.gov.br/handle/1/14826 |
| _version_ |
1787141470394777600 |
| score |
11.755432 |