College of Marine Living Resource Sciences and Management, Shanghai Ocean University, Shanghai, China.
College of Marine Living Resource Sciences and Management, Shanghai Ocean University, Shanghai, China; Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources, Ministry of Education, Shanghai, China; National Engineering Research Centre for Oceanic Fisheries, Shanghai Ocean University, Shanghai, China; Key Laboratory of Oceanic Fisheries Exploration, Ministry of Agriculture and Rural Affairs, Shanghai, China.
Mar Pollut Bull. 2024 Nov;208:116910. doi: 10.1016/j.marpolbul.2024.116910. Epub 2024 Sep 9.
We employed Fourier infrared spectroscopy, laser infrared technology, and stable isotope analysis to investigate the relationships between characteristics of ingested plastics and size-related feeding ecology of a mesopelagic predator, longnose lancetfish Alepisaurus ferox. Plastics were detected in 81.48 % of specimens, up to 8.81 ± 8.29 items/individual and 0.59 ± 0.66 items/g wet weight of intestine, and were sized 20.00 μm to 6.50 cm. The majority were granules and fragments in shape, and polystyrene and acrylate copolymer in polymer type. The diversity indices exhibited a correlation with trophic position and body size groups, emphasizing that the ontogenetic dietary shift of A. ferox may influence the diversity of plastics ingested. This study provides new insights into the plastic pathways linking epipelagic and mesopelagic food webs and demonstrates that biochemical ecological tracers can effectively indicate the bioavailability of plastic correlated with growth in mesopelagic predator.
我们采用傅里叶变换红外光谱、激光红外技术和稳定同位素分析方法，研究了摄入塑料的特征与中上层掠食者长鼻剑鱼（Alepisaurus ferox）体型相关摄食生态之间的关系。在 81.48%的样本中检测到了塑料，每个个体的摄入量高达 8.81±8.29 个，肠道湿重的摄入量为 0.59±0.66 个/g，尺寸范围为 20.00μm 至 6.50cm。大多数塑料呈颗粒状和碎片状，聚合物类型为聚苯乙烯和丙烯酸盐共聚物。多样性指数与营养位置和体型组呈相关关系，这强调了长鼻剑鱼的个体发育性食性转变可能会影响其摄入塑料的多样性。本研究为连接表水层和中层水食物网的塑料途径提供了新的见解，并表明生物化学生态示踪剂可以有效地指示与中层掠食者生长相关的塑料生物利用度。
