据报道,海洋环境中存在微塑料,这些污染物也存在于食物网中。关于哈勒圆形射线(Urobatishalleri)和加利福尼亚湾东海岸底部沉积物中存在微塑料的信息是不存在的。在该地区检查了该物种个体的消化道和沉积物样品的塑料颗粒。总的来说,在沉积物中发现了107个塑料颗粒。都是纤维,94.4%是微塑料,其余的是介体。分析了142条射线的胃肠道,确定这是底栖动物。从46个人(32.4%)中总共回收了386个塑料颗粒。每个样品平均发现10.2(±7.4)个塑料颗粒,塑料长度范围从0.00821毫米到0.953毫米。FTIR-ATR分析显示存在六种类型的聚合物:聚酰胺或尼龙聚乙烯,聚丙烯,在哈勒圆射线的沉积物和胃肠道中都发现了聚丙烯酸。聚对苯二甲酸乙二醇酯和聚丙烯酰胺仅在射线的胃肠道中发现。这些聚合物与该地区的人类活动一致,特别是集约化小规模和工业渔业,因为它们被用来制作渔网,塑料袋,储存容器,服装,渔船维护。我们的结果表明,底栖饲养器暴露于塑料碎片,它的存在是另一个潜在的威胁,已经受到副渔获物的威胁,过度捕捞,和其他污染物。然而,在该地区,关于塑料碎片在电池中的摄取及其在沉积物中的存在的研究仍然很少或根本不存在。因此,这些研究对于保护这些物种是必要的。
The presence of microplastics has been reported in the marine environment and these pollutants have also been reported in food webs. Information about the presence of microplastics in the Haller\'s Round Ray (Urobatis halleri) and bottom sediments off the east coast of the Gulf of California is non-existent. The digestive tracts of individuals of this species and sediment samples were examined for plastic particles in this region. In total, 107 plastic particles were found in the sediment. All were fibers and 94.4% were microplastics, the rest were mesoplastics. The gastrointestinal tracts of 142 rays were analysed, and it was determined that this is a benthic feeder. A total of 386 plastic particles were recovered from 46 individuals (32.4%). On average 10.2 (±7.4) plastic particles were found per specimen, with plastic lengths ranging from 0.00821 mm to 0.953 mm. The FTIR-ATR analysis revealed the presence of six types of polymers: polyamide or nylon polyethylene, polypropylene, and polyacrylic were found in both sediments and gastrointestinal tracts of Haller\'s Round Ray. Polyethylene terephthalate and polyacrylamide were only found in the gastrointestinal tracts of the ray. These polymers are consistent with the human activities undertaken in this area, specifically intensive small-scale and industrial fisheries, as they are used for the elaboration of fishing nets, plastic bags, storage containers, clothing, and fishing boats maintenance. Our results show that benthic feeders are exposed to plastic debris, and its presence is another potential threat to batoids, which are already threatened by bycatch, overfishing, and other pollutants. However, studies on the ingestion of plastic debris in batoids and its presence in the sediment are still scarce or non-existent for this region. As such, these studies are necessary to help in the preservation of these species.