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Title: Effects of nitrite exposure on the hemolymph electrolyte, respiratory protein and free amino acid levels and water content of Penaeus japonicus
Authors: Sha-Yen Cheng
Jiann-Chu Chen
Contributors: 國立臺灣海洋大學:環境生物與漁業科學學系
Keywords: Penaeus japonicus;Nitrite;Hemolymph electrolyte;Free amino acid;Urea;Water content
Date: 1998-12
Issue Date: 2016-12-26T06:45:50Z
Publisher: Aquatic Toxicology
Abstract: Abstract:Penaeus japonicus which had been exposed individually for 3, 6, 12, 24 and 48 h to 0.001 (control), 0.07, 0.36, 0.72 and 1.43 mM nitrite at 30 ppt of salinity were examined for hemolymph electrolyte, oxyhemocyanin, protein, free amino acid (FAA) and urea levels and whole shrimp's nitrite uptake and ammonia excretion. Hemolymph oxyhemocyanin, protein, FAA, osmolality, Cl− and Na+ levels were inversely related to ambient nitrite and exposure time. However, hemolymph urea level, osmotic differential (medium osmolality−hemolymph osmolality), nitrite uptake, ammonia excretion and water content increased directly with ambient nitrite and exposure time. It is suggested that when P. japonicus are exposed to nitrite, water uptake and nitrite uptake result in reductions of hemolymph Cl−, Na+ and protein levels leading to a decrease of hemolymph osmolality. An increase of hemolymph urea and a decrease of arginine may indicate an occurrence of ureogenesis for the intracellular osmoregulation of P. japonicus under nitrite stress.
Relation: 44(1-2), pp.129-139
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/39646
Appears in Collections:[環境生物與漁業科學學系] 期刊論文

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