Beijing Advanced Innovation Center for Food Nutrition and Human Health, Department of Applied Chemistry, China Agricultural University, Beijing, 100193, PR China.
Department of Industrial Development, China Crop Protection Industry Association, Rm.918,Building 16, An Hui Li Forth Section, Chaoyang, Beijing, 100723, China.
Environ Pollut. 2020 Jul;262:114341. doi: 10.1016/j.envpol.2020.114341. Epub 2020 Mar 9.
The trade-off between self-maintenance and reproduction has been explored wildly in reptiles. However, the effects of exogenous pollutants on the life history traits of reptiles have not been paid attention to. In the current study, lizards (Eremias argus), living in the soil polluted by perfluorooctanoic acid (PFOA) were selected as the main focus. Bodyweight, survival rate, clutch characteristics and biochemical analysis (immune response, lipid accumulation, sex steroid secretion, antioxidant level, and metabolomics) were investigated and the results revealed that lizards' life-history trade-offs are gender-dependent: females were more inclined to choose a "Conservative" life-history strategy. After 60 days of exposure to PFOA, larger body weight, higher survival rate, stronger immune response, and lighter egg mass in females suggested that their trade-offs are more biased towards self-maintenance. Whereas, the "Risk" strategy would more popular among males: reduced body weight and survival rate, and suffering from oxidative damage indicated that males made little investment in self-maintenance.
在爬行动物中，自我维持和繁殖之间的权衡一直被广泛探讨。然而，外源污染物对爬行动物生活史特征的影响尚未得到关注。在本研究中，选择生活在全氟辛酸 (PFOA) 污染土壤中的蜥蜴 (Eremias argus) 作为主要研究对象。研究了体重、存活率、卵囊特征和生化分析（免疫反应、脂质积累、性类固醇分泌、抗氧化水平和代谢组学），结果表明，蜥蜴的生活史权衡是性别依赖的：雌性更倾向于选择“保守”的生活史策略。在暴露于 PFOA 60 天后，雌性的体重更大、存活率更高、免疫反应更强、卵质量更轻，这表明它们的权衡更偏向于自我维持。相比之下，雄性则更倾向于“冒险”策略：体重和存活率降低，并且遭受氧化损伤表明雄性在自我维持方面的投资很少。
