Correlations between pathological changes and chemical contamination in American eels, Anguilla rostrata, from the St. Lawrence River
Correlations between pathological changes and chemical contamination in American eels, Anguilla rostrata, from the St. Lawrence River
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DOI：
10.1139/cjfas-54-8-1916
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发表时间：
1997-08-01
影响因子：
2.4
通讯作者：
Castonguay, M
中科院分区：
文献类型：
--
作者：
Couillard, CM;Hodson, PV;Castonguay, M
来自圣劳伦斯河的美洲鳗（安圭拉鳗）受到化学物质的严重污染，这些化学物质可能与疾病发病率增加和生殖障碍有关。利用组织微生物浓度与体重之间的关系将鳗鱼分为两组：随着迁移季节的进展，从受污染地区（安大略湖和上圣劳伦斯河）迁移的鳗鱼比例增加。椎体畸形和肝脏嗜碱性灶（肿瘤前病变）在洄游季节结束时更为常见，此时鳗鱼受到有机氯化合物的污染更为严重。相比之下，肠系膜线虫在季节的第一周更为常见，当时鳗鱼受到的污染较少。不同时期卵母细胞的直径和百分比，以及脾脏中色素巨噬细胞聚集体的密度和表面积，在不同周之间没有变化。虽然嗜碱性酸是暴露于环境污染物的特定生物标志物，但椎体畸形可能由各种其他人为或自然因素引起。需要进一步的研究来证实所观察到的化学污染与病理变化之间的联系。
American eel (Anguilla rostrata) from the St. Lawrence River are heavily contaminated with chemicals that mag. be associated with increased incidence of diseases and reproductive impairment. The relationship between tissue mirex concentration and body mass was used to separate eels into two groups: the proportion of eels migrating from contaminated areas (Lake Ontario and upper St. Lawrence River) increased as the migration season progressed. Vertebral malformations and basophilic foci in the liver (preneoplastic lesions) were more frequent at the end of the migratory season, when the eels were more heavily contaminated with organochlorine compounds. in contrast, mesenteric nematodes were more common in the first week of the season, when eels were less contaminated. Diameters and percentages of different stages of oocytes, and density and surface area of pigmented macrophage aggregates in the spleen, did not vary among weeks. While basophilic aci are specific biomarkers of exposure to environmental contaminants, vertebral malformations may be caused by a variety of other anthropogenic or natural factors. Further studies are needed to confirm the observed associations between chemical contamination and pathological changes.