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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/39636

Title: Changes in hemolymph oxyhemocyanin, acid–base balance, and electrolytes in Marsupenaeus japonicus under combined ammonia and nitrite stress
Authors: Sha-Yen Cheng;Li-Wei Shieh;Jiann-Chu Chen
Contributors: 國立臺灣海洋大學:環境生物與漁業科學學系
Keywords: Marsupenaeus japonicus;Ammonia;Nitrite;Joint action;Acid–base balance;Osmolality
Date: 2013-04
Issue Date: 2016-12-26T01:57:17Z
Publisher: Aquatic Toxicology
Abstract: Abstract:Ammonia and nitrite are the most common toxic nitrogenous compounds in aquaculture ponds. We evaluated the effects of a combined treatment with these two compounds on the hemolymph acid–base balance, electrolytes and oxyhemocyanin content in kuruma shrimp, (Marsupenaeus japonicus). The shrimp (6.37 ± 1.29 g) were individually exposed to 9 different ammonia and nitrite regimes {ammonia at 0 (control), 0.39, and 1.49 mM combined with nitrite at 0 (control), 0.38, and 1.49 mM} in a 30‰ saline solution at 22 °C. Hemolymph oxyhemocyanin (OxyHc), protein content, acid–base balance, osmolality, and electrolyte levels were measured in treated shrimp after 48 h of treatment. Hemolymph OxyHc, protein content, the OxyHc/protein ratio, pH, pCO2, HCO3−, TCO2, OH−/H+, osmolality, and Cl−, Na+, K+, Ca2+, and Mg2+ levels were inversely related to the dose of ammonia and nitrite. However, hemolymph pO2 levels directly increased with the ammonia and nitrite concentrations. Following exposure to 1.49 mM ammonia + 1.49 mM nitrite, the hemolymph pO2 increased by 89.5%, whereas the hemolymph OxyHc, protein content, OxyHc/protein ratio, pH, pCO2, HCO3−, TCO2, OH−/H+, osmolality, Cl−, and Na+ decreased by 51.2, 28.2, 34.9, 2.9, 51.1, 71.5, 70.8, 42.8, 4.9, 32.1, and 38.6%, respectively, compared with control shrimp. Combined ammonia and nitrite stress may therefore exert a synergistic effect on shrimp relative to the stress induced by ammonia or nitrite alone.
Relation: 130-131(15), pp.132-138
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/39636
Appears in Collections:[環境生物與漁業科學學系] 期刊論文

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