Oxygen transfer in fish: morphological and molecular adjustments.
A wide range of organismic, physiological and biochemical adjustments to improve oxygen transfer is observed in fish exposed to environmental hypoxia and during anemia. Many fish species of the Amazon obtain oxygen directly from air when water oxygen is low. The accessory air-breathing organs includ...
| Autor principal: | Val, Adalberto Luis |
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| Grau: | Artigo |
| Idioma: | English |
| Publicado em: |
Brazilian journal of medical and biological research = Revista brasileira de pesquisas médicas e biológicas / Sociedade Brasileira de Biofísica ... [et al.]
2020
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| Acesso em linha: |
https://repositorio.inpa.gov.br/handle/1/19431 |
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oai:repositorio:1-19431 |
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oai:repositorio:1-19431 Oxygen transfer in fish: morphological and molecular adjustments. Val, Adalberto Luis Adenosine Triphosphate Guanosine Triphosphate Anemia Animals Anoxia Erythrocyte Fish Hematocrit Metabolism Oxygen Consumption Physiology Review Adenosine Triphosphate Anemia Animal Anoxia Erythrocytes Fishes Guanosine Triphosphate Hematocrit Oxygen Consumption A wide range of organismic, physiological and biochemical adjustments to improve oxygen transfer is observed in fish exposed to environmental hypoxia and during anemia. Many fish species of the Amazon obtain oxygen directly from air when water oxygen is low. The accessory air-breathing organs include modifications of the gills, mouth, stomach and intestine, and swimbladder vascularization. Other species extend the lower lip and skim to improve oxygen uptake from the oxygen-rich surface layer of the water. The amount of oxygen uptake from air was estimated for Hoplosternum littorale and Lipossarcus pardalis. In addition, the oxygen uptake from the water surface was estimated for Colossoma macropomum. Blood oxygen content was reduced by 30% in Hoplosternum littorale and Colossoma macropomum and 70% in Lipossarcus pardalis if they were denied access to air. Adjustments of intraerythrocytic levels of ATP and GTP significantly improve oxygen transfer in fish during environmental hypoxia and anemia. In contrast to environmental hypoxia, intraerythrocytic levels of ATP and GTP increase during anemia in fish facilitating oxygen unloading to the tissues. It is suggested that the increase in ATP and GTP levels during anemia occurs because the conditions required to increase the activity of adenylate and guanylate phosphate synthetic pathways are similar. 2020-06-15T22:08:35Z 2020-06-15T22:08:35Z 1995 Artigo https://repositorio.inpa.gov.br/handle/1/19431 en Volume 28, Número 11-12, Pags. 1119-1127 Restrito Brazilian journal of medical and biological research = Revista brasileira de pesquisas médicas e biológicas / Sociedade Brasileira de Biofísica ... [et al.] |
| institution |
Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional |
| collection |
INPA-RI |
| language |
English |
| topic |
Adenosine Triphosphate Guanosine Triphosphate Anemia Animals Anoxia Erythrocyte Fish Hematocrit Metabolism Oxygen Consumption Physiology Review Adenosine Triphosphate Anemia Animal Anoxia Erythrocytes Fishes Guanosine Triphosphate Hematocrit Oxygen Consumption |
| spellingShingle |
Adenosine Triphosphate Guanosine Triphosphate Anemia Animals Anoxia Erythrocyte Fish Hematocrit Metabolism Oxygen Consumption Physiology Review Adenosine Triphosphate Anemia Animal Anoxia Erythrocytes Fishes Guanosine Triphosphate Hematocrit Oxygen Consumption Val, Adalberto Luis Oxygen transfer in fish: morphological and molecular adjustments. |
| topic_facet |
Adenosine Triphosphate Guanosine Triphosphate Anemia Animals Anoxia Erythrocyte Fish Hematocrit Metabolism Oxygen Consumption Physiology Review Adenosine Triphosphate Anemia Animal Anoxia Erythrocytes Fishes Guanosine Triphosphate Hematocrit Oxygen Consumption |
| description |
A wide range of organismic, physiological and biochemical adjustments to improve oxygen transfer is observed in fish exposed to environmental hypoxia and during anemia. Many fish species of the Amazon obtain oxygen directly from air when water oxygen is low. The accessory air-breathing organs include modifications of the gills, mouth, stomach and intestine, and swimbladder vascularization. Other species extend the lower lip and skim to improve oxygen uptake from the oxygen-rich surface layer of the water. The amount of oxygen uptake from air was estimated for Hoplosternum littorale and Lipossarcus pardalis. In addition, the oxygen uptake from the water surface was estimated for Colossoma macropomum. Blood oxygen content was reduced by 30% in Hoplosternum littorale and Colossoma macropomum and 70% in Lipossarcus pardalis if they were denied access to air. Adjustments of intraerythrocytic levels of ATP and GTP significantly improve oxygen transfer in fish during environmental hypoxia and anemia. In contrast to environmental hypoxia, intraerythrocytic levels of ATP and GTP increase during anemia in fish facilitating oxygen unloading to the tissues. It is suggested that the increase in ATP and GTP levels during anemia occurs because the conditions required to increase the activity of adenylate and guanylate phosphate synthetic pathways are similar. |
| format |
Artigo |
| author |
Val, Adalberto Luis |
| title |
Oxygen transfer in fish: morphological and molecular adjustments. |
| title_short |
Oxygen transfer in fish: morphological and molecular adjustments. |
| title_full |
Oxygen transfer in fish: morphological and molecular adjustments. |
| title_fullStr |
Oxygen transfer in fish: morphological and molecular adjustments. |
| title_full_unstemmed |
Oxygen transfer in fish: morphological and molecular adjustments. |
| title_sort |
oxygen transfer in fish: morphological and molecular adjustments. |
| publisher |
Brazilian journal of medical and biological research = Revista brasileira de pesquisas médicas e biológicas / Sociedade Brasileira de Biofísica ... [et al.] |
| publishDate |
2020 |
| url |
https://repositorio.inpa.gov.br/handle/1/19431 |
| _version_ |
1787144361526427648 |
| score |
11.755432 |