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Impacts of polystyrene microplastics on the behavior and metabolism in a marine demersal teleost, black rockfish (Sebastes schlegelii)

发布时间：2019-09-05

LiyunYin,  Haiyan Liu ,Hongwu Cui , BijuanChen , Lingli Lia, Fan Wua

Journal of Hazardous Materials

Abstract:After nano- (0.5 μm) or micro- (15 μm) polystyrene(PS) microplastics exposure, the behavior, metabolism and energy reserve inmarine demersal fish (Sebastesschlegelii) were evaluated. The behavior of fish wasaccurately recorded by videobehavior tracking technology.Results showed that changes in behavior (e.g. cluster, thereduction of swimming speed and range of movement) were significantly greaterin 15-μm PS-exposed fish, whichmay affect hunting behavior and explorationcompetence. Oxygen consumption and ammonia excretion of fish wassignificantly greater in 15-μm PS treatment than in 0.5-μm PS treatment, suggesting respiration and metabolism stress. Moreover, the abnormal behavior, respiration and ammonia excretion of PS-exposedfish had recovered modestly. In addition, abnormal symptoms ofbile, liver and lumen ofintestine were detected in 15-μm PS exposure. Importantly, the growth and gross energy of fish werereduced in 15-μm PS exposure than 0.5-μm PS exposure. Both 0.5-μm and 15-μm PS exposures led tosignificantly lower protein and lipid contents, suggesting energy reserve and nutrition quality reduction of fish. Overall, microplastics had the negative impact at greater levels than nanoplastics. Alteredbehavior, energy reserve and nutritional quality of fish indicated thepotential risk on biological functions, the development of fishery and foodsafety.

Keywords: microplastics; particle size; fish; behavior; metabolism;food safety

https://doi.org/10.1016/j.jhazmat.2019.120861