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首页> 外文期刊>Environmental toxicology and chemistry >FURTHER INVESTIGATIONS OF THE ETIOLOGY OF SUBCUTANEOUS NEOPLASMS IN NATIVE GIZZARD SHAD (DOROSOMA CEPEDIANUM)
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FURTHER INVESTIGATIONS OF THE ETIOLOGY OF SUBCUTANEOUS NEOPLASMS IN NATIVE GIZZARD SHAD (DOROSOMA CEPEDIANUM)

机译：天然蜥蜴皮（DOROSOMA CEPEDIANUM）皮下肿瘤的病因的进一步调查

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摘要

Aspects of the etiology of subcutaneous spindle-cell neoplasms in feral gizzard shad (Dorosoma cepedianum) collected from Lake of the Arbuckles, Oklahoma, were investigated. Field collections of adult and juvenile gizzard shad were conducted to determine the prevalence and seasonality of neoplasms and site specificity of neoplasm-bearing fish. Overall neoplasm prevalence for adult gizzard shad was 22.1%; no juveniles exhibited neoplasms. Neoplasm occurrence did not appear seasonal. Neoplasm-bearing gizzard shad were found at all three sampling sites within Lake of the Arbuckles with similar neoplasm prevalence rates (Guy Sandy Creek 22.1%, Rock Creek, 17.9%, and Buckhorn Creek 22.4%). No gizzard shad (juvenile or adult) collected from Lake Carl Blackwell, Oklahoma, the reference site, exhibited neoplasms. Water, sediment, and shad liver tissue from Lake of the Arbuckles and the reference site were analyzed for total recoverable metals (cadmium, chromium, copper, nickel, and lead, by graphite furnace atomic absorption). Chromium, copper, and nickel were found in the water samples at concentrations of >1 to 8.6 μg/L. Low concentrations (>1 to 13.6 μg/g wet weight) of all the metals were found in the sediment and liver tissue from both sites. Heavy metal contamination does not appear linked to neoplasm occurrence. To determine if a nonbacterial infectious agent was responsible for tumor formation, cell-free neoplasm homogenates were injected into healthy rainbow trout. Neoplasms were not transmitted into rainbow trout. The etiology of these neoplasms remains unknown.
机译：调查了从俄克拉荷马州阿巴克尔斯湖采集的野生g皮（Dorosoma cepedianum）的皮下梭形细胞瘤的病因学方面。进行了成年和幼年g的田野采集，以确定肿瘤的流行率和季节性以及荷瘤鱼的部位特异性。成年izz的整体肿瘤患病率为22.1％；没有少年表现出肿瘤。肿瘤的发生没有季节性出现。在阿尔巴克斯湖的所有三个采样点都发现了带有肿瘤的g鱼，其肿瘤的患病率相似（盖伊·桑迪克里克22.1％，罗克克里克17.9％和巴克霍恩克里克22.4％）。从参考地点俄克拉何马州的卡尔·布莱克威尔湖收集的g（幼年或成年）未出现肿瘤。分析了来自Arbuckles湖和参考地点的水，沉积物和sha鱼肝组织的总可回收金属（镉，铬，铜，镍和铅，通过石墨炉原子吸收法）。在水样中发现的铬，铜和镍的浓度> 1至8.6μg/ L。在两个位置的沉积物和肝组织中发现所有金属的浓度低（> 1至13.6μg/ g湿重）。重金属污染似乎与肿瘤的发生无关。为了确定是否由非细菌性传染因子引起肿瘤形成，将无细胞的肿瘤匀浆注射到健康的虹鳟鱼中。肿瘤没有传播到虹鳟鱼中。这些肿瘤的病因仍然未知。

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