摘要:
电离辐射对海洋生物的影响日益受到人们关注。为探讨电离辐射对沿海重要水产经济物种大黄鱼(Pseudosciaena crocea)幼鱼生长的影响,通过不同剂量(0, 4, 8, 16, 32 Gy)的60Co γ射线外照射,分别从存活、体重体长、抗氧化能力和消化能力等几方面,观察分析了大黄鱼幼鱼生长的辐射响应情况。结果表明,不同剂量的γ射线照射对养殖期间的大黄鱼幼鱼体重、体长和器官指数的影响均不显著;对大黄鱼幼鱼抗氧化能力及消化能力的刺激/抑制表现状况差异明显,其中,低剂量组在照射后前期有显著促进作用,但随养殖时间增加趋于正常,中、高剂量组在养殖周期内均呈抑制状态,并造成鱼体不可逆的损伤。该实验结果为海洋生物的辐射效应研究提供数据支撑,为滨海核电周边海域环境放射性安全评估提供科学依据。
关键词:
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电离辐射
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大黄鱼
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生物效应
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生长
Abstract:
The effects of ionizing radiation on marine creatures have received increasing attention. In order to investigate the effects of ionizing radiation on the growth of juvenile Pseudosciaena crocea, an important aquatic commercial species in China, 60Co gamma-ray external irradiation with different doses (0, 4, 8, 16, 32 Gy) was employed in this study. Then the survival, body weight, body length, antioxidant capacity and digestive capacity of this species were observed and analyzed in this study. The results showed that different doses of γ-ray irradiation had no significant effect on body weight, body length and organ index of juvenile Pseudosciaena crocea. The stimulation/inhibition performance of other growth features was present to be significantly different during the whole incubation. The significant promotion effect was present in the early stage of the low dose group of irradiation and tended to be normal following the incubation, and inhibition effects and irreversible body damage was observed in the medium and high dose groups. The results can shed light on the future study of the radiation effects on marine organisms and the development of environmental radioactivity safety assessment in the coastal waters surrounding the nuclear power.