Histopathological changes in gills of the estuarine crab Chasmagnathus granulata (Crustacea-Decapoda) following acute exposure to ammonia

Mauro de Freitas Rebelo , Enrique M. Rodriguez , Euclydes A. Santos , Martı́n Ansaldo
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引用次数: 57

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.

河口蟹(甲壳纲-十足纲)急性氨暴露后鳃的组织病理学变化
研究了氨对河口蟹(Chasmagnathus granulata, Dana, 1851)急性暴露于LC50 (17.85 Mm)左右的氨浓度后鳃的组织病理学影响。所观察到的主要影响是壁柱细胞的破坏和随后的鳃片的塌陷。上皮坏死和增生也可见。氨暴露蟹血淋巴中pCO2和乳酸显著升高(p < 0.05), pO2显著降低(p < 0.05)。这些变化提示观察到的组织病理学损伤影响了气体交换,可能导致死亡。
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