http://scholars.ntou.edu.tw/handle/123456789/12726
Title: | Study on the oxyhemocyanin, deoxyhemocyanin, oxygen affinity and acid-base balance of Marsupenaeus japonicus following exposure to combined elevated nitrite and nitrate | Authors: | Sha-Yen Cheng Jiann-Chu Chen |
Keywords: | FRESH-WATER CRAYFISH;PENAEUS-MONODON;AMBIENT NITRITE;HEMOCYANIN CONCENTRATION;AMMONIA EXCRETION;ASTACUS-ASTACUS;PROTEIN-LEVELS;MOLTING CYCLE;HEMOLYMPH;METHEMOGLOBINEMIA | Issue Date: | Dec-2002 | Journal Volume: | 61 | Journal Issue: | 3-4 | Source: | Aquatic Toxicology | Abstract: | Marsupenaeus japonicus (11.47 +/- 0.71 g) exposed individually to six different nitrite and nitrate regimes {(0.002 (control), 0.359 and 1.456 mM nitrite combined with 0.005 (control) and 7.458 mM nitrate)} in salinity of 30 ppt (parts per thousand) were examined for hemocyanin oxygen affinity, the fractionation of oxyhemocyanin and deoxyhemocyanin, and the acid-base balance after 24 h. Ambient nitrite at concentration of 0.359 mM caused reduction of oxyhemocyanin and protein by 27 and 11%, respectively, whereas ambient nitrate as high as 7.458 mM caused reduction of oxyhemocyanin and protein by 10 and 7%. Ambient nitrite at concentration of 1.456 mM caused increases of P-50 (indicating reduced oxygen affinity) and pO(2,) but caused reduction in hemolymph pCO(2), pH, HCO3- and TCO2. Following exposure to combined solutions of 1.456 mM nitrite and 7.458 mM nitrate there were no further changes in oxyhemocyanin, protein, hemolymph P-50, pO(2), pCO(2), HCO3- and TCO2, but there was a significant reduction of pH. (C) 2002 Elsevier Science B.V. All rights reserved. |
URI: | http://scholars.ntou.edu.tw/handle/123456789/12726 | ISSN: | 0166-445X | DOI: | 10.1016/s0166-445x(02)00053-x |
Appears in Collections: | 環境生物與漁業科學學系 |
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