Leibniz Centre for Tropical Marine Research (ZMT), Fahrenheitstraße 6, 28359 Bremen, Germany.
Centro de Ciências do Mar (CCMAR), Universidade do Algarve, Campus de Gambelas, 8005-139 Faro, Portugal.
Mar Pollut Bull. 2020 Aug;157:111162. doi: 10.1016/j.marpolbul.2020.111162. Epub 2020 Jun 10.
Previous laboratory feeding experiments, representing the state-of-the-art methodology to investigate microplastic (MP) ingestion and its impact for fish, tend to disregard both the significance of applying realistic MP densities and the potential relevance of biofilm-coating for ingestion probability. This experiment assessed the uptake of either pristine or biofilm-coated MP particles and the physiological impacts for juvenile white seabream for MP concentrations consistent with those found in the field along with natural prey over a course of 3.5 weeks. Results indicate the ability of juvenile D. sargus to discriminate between edible and non-edible prey. A distinct preference for biofilm-coated over pristine particles could not be verified. No significant impact on growth and condition was found except for high levels of MP ingestion. The outcomes highlight the importance of performing MP feeding experiments mimicking natural conditions to reliably assess the impact of MP on early life stages of fish.
先前的实验室喂养实验代表了研究微塑料（MP）摄入及其对鱼类影响的最先进方法，但往往忽略了应用实际 MP 密度的重要性和生物膜涂层对摄入概率的潜在相关性。本实验评估了幼白鲷对原始或生物膜涂层 MP 颗粒的吸收及其在 3.5 周内与自然猎物一致的 MP 浓度下的生理影响。结果表明，幼鱼 D. sargus 有能力区分可食用和不可食用的猎物。不能证实对生物膜涂层颗粒有明显的偏好，除了高水平的 MP 摄入外，没有发现对生长和状况有显著影响。研究结果强调了进行模拟自然条件的 MP 喂养实验的重要性，以便可靠地评估 MP 对鱼类早期生活阶段的影响。
