Histopathological changes in gills of the estuarine crab Chasmagnathus granulata (Crustacea-Decapoda) following acute exposure to ammonia |
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| Institution: | 1. Shrimp Research Center, Iranian Fisheries Sciences Research Institute, Agricultural Research, Education and Extension Organization (AREEO), Bushehr, Iran.;2. Department of Fisheries and Natural Resources, Bushehr Branch, Islamic Azad University, Bushehr, Iran.;1. College of Food Science, Shenyang Agricultural University, Shenyang, Liaoning 110866, China;2. Institute of Plant Nutrition and Environmental Resources, Liaoning Academy of Agricultural Sciences, Shenyang, Liaoning 110661, China |
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| Abstract: | Histopathological effects of ammonia on the gills of the estuarine crab Chasmagnathus granulata (Dana, 1851) were evaluated after acute exposure to ammonia concentrations around LC50 value (17.85 Mm). Disruption of pilaster cells and a subsequent collapse of gill lamellae were the main effects observed. Ephitelial necrosis and hyperplasia were also detected. Significant (P<0.05) increases in pCO2 and lactate, and significant decreases of pO2 were detected in the haemolymph of ammonia-exposed crabs. These changes suggest that the observed histopathological damage affected gas exchange, possibly leading to death. |
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