Effects on acid‐base balance, methaemoglobinemia and nitrogen excretion of European eel after exposure to elevated ambient nitrite
Haemoglobin, methaemoglobin, blood nitrite concentration and acid‐base balance were measured in European eel Anguilla anguilla following exposure to 0 (control), 0·142, 0·356, 0·751 and l·549 mM nitrite in fresh water for 24 h. Blood GOT (glutamate oxaloacetate transaminase) and GPT (glutamate pyruv...
| Published in: | Journal of Fish Biology |
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| Main Authors: | , |
| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
Wiley
2002
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| Subjects: | |
| Online Access: | http://dx.doi.org/10.1111/j.1095-8649.2002.tb00906.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1095-8649.2002.tb00906.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1095-8649.2002.tb00906.x |
| Summary: | Haemoglobin, methaemoglobin, blood nitrite concentration and acid‐base balance were measured in European eel Anguilla anguilla following exposure to 0 (control), 0·142, 0·356, 0·751 and l·549 mM nitrite in fresh water for 24 h. Blood GOT (glutamate oxaloacetate transaminase) and GPT (glutamate pyruvate transaminase) activities and whole animal ammonia‐N and urea‐N excretions were also measured. Blood nitrite, methaemoglobin, PO 2 (oxygen partial pressure), GOT, and whole animal ammonia‐N excretion and urea‐N excretion increased directly with increasing ambient nitrite concentrations, whereas blood pH, PCO 2 , and HCO − 3 were inversely related to ambient nitrite concentration. An accumulation of nitrite in the blood of A. anguilla following 24 h exposure to elevated ambient nitrite as low as 0·751 mM increased its blood methaemoglobin, PO 2 , GOT and nitrogen excretion, but decreased its PCO 2 (carbon dioxide partial pressure), HCO − 3 and functional haemoglobin. |
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