Mauro de Freitas Rebelo , Enrique M. Rodriguez , Euclydes A. Santos , Martı́n Ansaldo
{"title":"河口蟹(甲壳纲-十足纲)急性氨暴露后鳃的组织病理学变化","authors":"Mauro de Freitas Rebelo , Enrique M. Rodriguez , Euclydes A. Santos , Martı́n Ansaldo","doi":"10.1016/S0742-8413(99)00093-6","DOIUrl":null,"url":null,"abstract":"<div><p>Histopathological effects of ammonia on the gills of the estuarine crab <em>Chasmagnathus granulata</em> (Dana, 1851) were evaluated after acute exposure to ammonia concentrations around LC<sub>50</sub> 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 (<em>P</em><0.05) increases in pCO<sub>2</sub> and lactate, and significant decreases of pO<sub>2</sub> were detected in the haemolymph of ammonia-exposed crabs. These changes suggest that the observed histopathological damage affected gas exchange, possibly leading to death.</p></div>","PeriodicalId":10586,"journal":{"name":"Comparative Biochemistry and Physiology Part C: Pharmacology, Toxicology and Endocrinology","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2000-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0742-8413(99)00093-6","citationCount":"57","resultStr":"{\"title\":\"Histopathological changes in gills of the estuarine crab Chasmagnathus granulata (Crustacea-Decapoda) following acute exposure to ammonia\",\"authors\":\"Mauro de Freitas Rebelo , Enrique M. Rodriguez , Euclydes A. Santos , Martı́n Ansaldo\",\"doi\":\"10.1016/S0742-8413(99)00093-6\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Histopathological effects of ammonia on the gills of the estuarine crab <em>Chasmagnathus granulata</em> (Dana, 1851) were evaluated after acute exposure to ammonia concentrations around LC<sub>50</sub> 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 (<em>P</em><0.05) increases in pCO<sub>2</sub> and lactate, and significant decreases of pO<sub>2</sub> were detected in the haemolymph of ammonia-exposed crabs. These changes suggest that the observed histopathological damage affected gas exchange, possibly leading to death.</p></div>\",\"PeriodicalId\":10586,\"journal\":{\"name\":\"Comparative Biochemistry and Physiology Part C: Pharmacology, Toxicology and Endocrinology\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2000-02-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1016/S0742-8413(99)00093-6\",\"citationCount\":\"57\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Comparative Biochemistry and Physiology Part C: Pharmacology, Toxicology and Endocrinology\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0742841399000936\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Comparative Biochemistry and Physiology Part C: Pharmacology, Toxicology and Endocrinology","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0742841399000936","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Histopathological changes in gills of the estuarine crab Chasmagnathus granulata (Crustacea-Decapoda) following acute exposure to ammonia
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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