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This study was an attempt to realize the effects of antimony on freshwater swamp shrimp (Macrobrachium nipponense). An experiment of this nature, which have not previously been carried out in this species. First, median lethal concentrations were determined in acute toxicity tests. The 96-h LC50 value was 6.748 (5.728-7.950) mg Sb/l for adult M. nipponense and 1.635 (1.271-2.103) mg Sb/l for juvenile M. nipponense. Juvenile M. nipponense were exposed to 4 different sublethal levels of antimony (0.1, 0.4, 0.8, and 1.2 mg Sb/l) over a 7-d test period and a 7-d recovery period. After 30 min (acute), there was an increase in the amount of oxygen consumed in all exposed groups. On days 3, 7, and 14, decreases in oxygen consumption were significant (p < 0.05) for the higher-exposure level groups (0.8 and 1.2 mg/l). Light microscopy investigations showed histopathological alterations in the hepatopancreas which correlated with exposure concentrations. The alterations included degenerative changes in the lumen, a reduction in the lumen volume, and injury to epithelial cells in the histoarchitecture of hepatopancreas

Sublethal Antimony (III) Exposure of Freshwater Swamp Shrimp (Macrobrachium Nipponense): Effects on Oxygen Consumption and Hepatopancreatic Histology