The impacts of microplastics on filter feeders megafauna have recently received increased attention. These organisms are potentially exposed to plastic ingestion and the release of added/sorbed contaminants during feeding activities. An assessment of microplastic abundance and the chemical impact of Phthalates esters (PAEs) were performed in neustonic samples and skin biopsies of Balaenoptera physalus and Rhincodon typus inhabiting the Gulf of California (Mexico). Sixty-eight percent of the net tows contained plastics with a maximum of 0.24 items/m³ mainly composed of polyethylene fragments. PAE levels were detected both in environmental and skin biopsy samples, with the highest values in the fin whale specimens (5291 ng/g d.w). Plasticizer fingerprint showed a similar distribution pattern between neustonic samples and filter-feeding species, with DEHP and MBP having the highest concentrations. The detection of PAE levels confirmed their potential role as plastic tracers and give preliminary information about the toxicological status of these species feeding in La Paz Bay.

微塑料对滤食性巨型动物的影响最近受到越来越多的关注。这些生物体在进食活动中可能会摄入塑料并释放添加/吸附的污染物。对居住在加利福尼亚湾（墨西哥）的Balaenoptera physalus和Rhincodon typus的非硬质样品和皮肤活检进行了微塑料丰度和邻苯二甲酸酯 (PAE) 的化学影响评估。68% 的网状丝束含有最多 0.24 件/m ^3的塑料主要由聚乙烯碎片组成。在环境和皮肤活检样本中均检测到了 PAE 水平，其中长须鲸标本中的 PAE 水平最高 (5291 ng/g dw)。增塑剂指纹在正性样品和滤食性样品之间显示出相似的分布模式，其中 DEHP 和 MBP 的浓度最高。PAE 水平的检测证实了它们作为塑料示踪剂的潜在作用，并提供了有关这些在拉巴斯湾觅食的物种的毒理学状况的初步信息。