Associação de Pesquisa e Preservação de Ecossistemas Aquáticos - Aquasis, Programa de Mamíferos Marinhos, Rua Pintor João Figueiredo, s/n, Iparana, Caucaia, CE 61627-250, Brazil; Programa de Pós-Graduação em Biodiversidade - Universidade Federal Rural de Pernambuco, Brazil.
Universidade Federal Rural de Pernambuco (UFRPE), Departamento de Pesca e Aquicultura (DEPAQ), Rua Dom Manuel de Medeiros, s/n, Recife, PE 52171-900, Brazil.
Mar Pollut Bull. 2023 Sep;194(Pt A):115407. doi: 10.1016/j.marpolbul.2023.115407. Epub 2023 Aug 21.
Marine mammals are considered sentinel species and may act as indicators of ocean health. Plastic residues are widely distributed in the oceans and are recognised as hazardous contaminants, and once ingested can cause several adverse effects on wildlife. This study aimed to identify and characterise plastic ingestion in the Guiana dolphins (Sotalia guianensis) from the Southwestern Tropical Atlantic by evaluating the stomach contents of stranded individuals through KOH digestion and identification of subsample of particles by LDIR Chemical Imaging System. Most of the individuals were contaminated, and the most common polymers identified were PU, PET and EVA. Microplastics were more prevalent than larger plastic particles (meso- and macroplastics). Smaller particles were detected during the rainy seasons. Moreover, there was a positive correlation between the stomach content mass and the number of microplastics, suggesting contamination through trophic transfer.
海洋哺乳动物被认为是哨兵物种，可能是海洋健康的指标。塑料残留物广泛分布在海洋中，被认为是有害污染物，一旦被摄入，会对野生动物造成多种不良影响。本研究旨在通过评估西南大西洋热带地区搁浅个体的胃内容物，通过 KOH 消化和 LDIR 化学成像系统对颗粒的亚样本进行识别，来确定和描述瓜纳亚海豚（Sotalia guianensis）的塑料摄入情况。大多数个体都受到了污染，最常见的聚合物是 PU、PET 和 EVA。微塑料比较大的塑料颗粒（中塑料和大塑料）更为普遍。在雨季检测到了更小的颗粒。此外，胃内容物质量与微塑料数量之间存在正相关关系，表明通过营养转移造成了污染。
