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Abstract：
Microplastics (<5 mm) are present in marine ecosystems worldwide where they can be ingested by a wide range of organisms from different trophic levels. In this study we analyzed the gastrointestinal tract of 443 specimens of Stellifer brasiliensis (124 juveniles, 254 subadults, and 65 adults) sampled in tropical beaches adjacent to the Paraíba River estuary. We found 1-3 microplastics in 42 fishes (9.48%), averaging 1.31 ± 0.52 microplastics per fish. The number of ingested microplastics by the different ontogenetic stages was statistically similar, but the adults had a higher ingestion frequency (13.8%). Among subadults, the condition factor of fishes that ingested microplastics was significantly smaller (p < 0.05) than those that had not ingested them. The ingestion of microplastics by the different ontogenetic stages of S. brasiliensis reflects the availability of this pollutant in the studied environment and highlights the vulnerability of fishes and other organisms through food webs.
摘要：
微塑料（<5毫米）存在于世界各地的海洋生态系统中，它们可以被来自不同营养水平的各种生物摄取。在这项研究中，我们分析了443个Stelliferbrasiliensis标本的胃肠道（124个少年，254个亚成人，和65名成年人）在帕拉伊巴河河口附近的热带海滩采样。我们在42条鱼中发现了1-3种微塑料（9.48％），平均每条鱼1.31±0.52微塑料。不同个体发育阶段摄入的微塑料数量在统计学上相似，但成年人的摄入频率较高(13.8%)。在亚成年人中，摄入微塑料的鱼类的条件因子明显小于未摄入微塑料的鱼类（p<0.05）。巴西链球菌不同个体发育阶段对微塑料的摄取反映了该污染物在所研究环境中的可用性，并强调了鱼类和其他生物通过食物网的脆弱性。
