ICBAS e Institute of Biomedical Sciences of Abel Salazar, University of Porto, Department of Population Studies, Laboratory of Ecotoxicology, Rua de Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal.
Environ Pollut. 2015 Jan;196:359-62. doi: 10.1016/j.envpol.2014.10.026.
Microplastics (MP) are ubiquitous contaminants able to cause adverse effects on organisms. Three hypotheses were tested here: early Pomatoschistus microps juveniles can ingest MP; the presence of MP may reduce fish predatory performance and efficiency; developmental conditions may influence the preyselection capability of fish. Predatory bioassays were carried out with juveniles from two estuaries with differences in environmental conditions: Minho (M-est) and Lima (L-est) Rivers (NW Iberian coast). Polyethylene MP spheres (3 types) alone and in combination with Artemia nauplii were offered as prey.All the MP types were ingested, suggesting confusion with food. Under simultaneous exposure to MP and Artemia, L-est fish showed a significant reduction of the predatory performance (65%) and efficiency (upto 50%), while M-est fish did not, suggesting that developmental conditions may influence the preyselection capability of fish. The MP-induced reduction of food intake may decrease individual and population fitness.
微塑料（MP）是普遍存在的污染物，能够对生物造成不良影响。这里测试了三个假设：早期的毛足燕鳚幼鱼能够摄入 MP；MP 的存在可能会降低鱼类的捕食表现和效率；发育条件可能会影响鱼类的捕食选择能力。使用来自两个具有不同环境条件的河口的幼鱼进行了捕食生物测定：米尼奥河（M-est）和利马河（L-est）（西北伊比利亚海岸）。单独和与卤虫无节幼体结合提供聚乙烯 MP 球体（3 种）作为猎物。所有类型的 MP 都被摄入，表明与食物混淆。在同时暴露于 MP 和卤虫的情况下，L-est 鱼类的捕食表现（65%）和效率（高达 50%）显著降低，而 M-est 鱼类则没有，这表明发育条件可能会影响鱼类的捕食选择能力。MP 引起的食物摄入量减少可能会降低个体和种群的适应性。
