Respiratory responses of the air-breathing fish Hoplosternum littorale to hypoxia and hydrogen sulfide
The present study analyzes the respiratory responses of the neotropical air-breathing fish Hoplosternum littorale to graded hypoxia and increased sulfide concentrations. The oxygen uptake (V̇O2), critical O 2 tension (PcO2), respiratory (fR) and air-breathing (fRA) frequencies in response to graded...
| Autor principal: | Affonso, Elizabeth Gusmão |
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| Outros Autores: | Rantin, Francisco Tadeu |
| Grau: | Artigo |
| Idioma: | English |
| Publicado em: |
Comparative Biochemistry and Physiology - C Toxicology and Pharmacology
2020
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https://repositorio.inpa.gov.br/handle/1/18861 |
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oai:repositorio:1-18861 |
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oai:repositorio:1-18861 Respiratory responses of the air-breathing fish Hoplosternum littorale to hypoxia and hydrogen sulfide Affonso, Elizabeth Gusmão Rantin, Francisco Tadeu Hydrogen Sulfide Breathing Breathing Rate Concentration (parameters) Fish Hypoxia Lethality Nonhuman Oxygen Consumption Oxygen Tension Priority Journal Hoplosternum Littorale The present study analyzes the respiratory responses of the neotropical air-breathing fish Hoplosternum littorale to graded hypoxia and increased sulfide concentrations. The oxygen uptake (V̇O2), critical O 2 tension (PcO2), respiratory (fR) and air-breathing (fRA) frequencies in response to graded hypoxia were determined for fish acclimated to 28°C. H. littorale was able to maintain a constant V̇O2 down to a PcO2 of 50 mm Hg, below which fish became dependent on the environmental O2 even with significant increases in fR. The fRA was kept constant around 1 breath h- 1 above 50 mm Hg and increased significantly below 40 mm Hg, reaching maximum values (about 4.5 breaths h- 1) at 10 mm Hg. The lethality to sulfide concentrations under normoxic and hypoxic conditions were also determined along with the fRA. For the normoxic fish the sulfide lethal limit was about 70 μM, while in the hypoxic ones this limit increased to 87 μM. The high sulfide tolerance of H. littorale may be attributed to the air-breathing capability, which is stimulated by this compound. © 2005 Elsevier Inc. All rights reserved. 2020-06-15T22:03:32Z 2020-06-15T22:03:32Z 2005 Artigo https://repositorio.inpa.gov.br/handle/1/18861 10.1016/j.cca.2005.07.003 en Volume 141, Número 3, Pags. 275-280 Restrito Comparative Biochemistry and Physiology - C Toxicology and Pharmacology |
| institution |
Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional |
| collection |
INPA-RI |
| language |
English |
| topic |
Hydrogen Sulfide Breathing Breathing Rate Concentration (parameters) Fish Hypoxia Lethality Nonhuman Oxygen Consumption Oxygen Tension Priority Journal Hoplosternum Littorale |
| spellingShingle |
Hydrogen Sulfide Breathing Breathing Rate Concentration (parameters) Fish Hypoxia Lethality Nonhuman Oxygen Consumption Oxygen Tension Priority Journal Hoplosternum Littorale Affonso, Elizabeth Gusmão Respiratory responses of the air-breathing fish Hoplosternum littorale to hypoxia and hydrogen sulfide |
| topic_facet |
Hydrogen Sulfide Breathing Breathing Rate Concentration (parameters) Fish Hypoxia Lethality Nonhuman Oxygen Consumption Oxygen Tension Priority Journal Hoplosternum Littorale |
| description |
The present study analyzes the respiratory responses of the neotropical air-breathing fish Hoplosternum littorale to graded hypoxia and increased sulfide concentrations. The oxygen uptake (V̇O2), critical O 2 tension (PcO2), respiratory (fR) and air-breathing (fRA) frequencies in response to graded hypoxia were determined for fish acclimated to 28°C. H. littorale was able to maintain a constant V̇O2 down to a PcO2 of 50 mm Hg, below which fish became dependent on the environmental O2 even with significant increases in fR. The fRA was kept constant around 1 breath h- 1 above 50 mm Hg and increased significantly below 40 mm Hg, reaching maximum values (about 4.5 breaths h- 1) at 10 mm Hg. The lethality to sulfide concentrations under normoxic and hypoxic conditions were also determined along with the fRA. For the normoxic fish the sulfide lethal limit was about 70 μM, while in the hypoxic ones this limit increased to 87 μM. The high sulfide tolerance of H. littorale may be attributed to the air-breathing capability, which is stimulated by this compound. © 2005 Elsevier Inc. All rights reserved. |
| format |
Artigo |
| author |
Affonso, Elizabeth Gusmão |
| author2 |
Rantin, Francisco Tadeu |
| author2Str |
Rantin, Francisco Tadeu |
| title |
Respiratory responses of the air-breathing fish Hoplosternum littorale to hypoxia and hydrogen sulfide |
| title_short |
Respiratory responses of the air-breathing fish Hoplosternum littorale to hypoxia and hydrogen sulfide |
| title_full |
Respiratory responses of the air-breathing fish Hoplosternum littorale to hypoxia and hydrogen sulfide |
| title_fullStr |
Respiratory responses of the air-breathing fish Hoplosternum littorale to hypoxia and hydrogen sulfide |
| title_full_unstemmed |
Respiratory responses of the air-breathing fish Hoplosternum littorale to hypoxia and hydrogen sulfide |
| title_sort |
respiratory responses of the air-breathing fish hoplosternum littorale to hypoxia and hydrogen sulfide |
| publisher |
Comparative Biochemistry and Physiology - C Toxicology and Pharmacology |
| publishDate |
2020 |
| url |
https://repositorio.inpa.gov.br/handle/1/18861 |
| _version_ |
1787143940385800192 |
| score |
11.755432 |