Vásquez-Domínguez Eunice, Lozano-Bilbao Enrique, Pascual Alayón Pedro J, Hardisson Arturo, Casañas Machin Iván, Paz Soraya, Gonález-Weller Dailos, Rubio Carmen, Gutiérrez Ángel J
Grupo interuniversitario de Toxicología Alimentaria y Ambiental, Facultad de Medicina, Universidad de La Laguna (ULL), Campus de Ofra, San Cristóbal de La Laguna, 38071, Tenerife, Spain.
Centro Oceanográfico de Canarias, Instituto Español de Oceanografía. IEO-CSIC, Pesquera de San Andrés.S/C de Tenerife, Calle Farola del Mar 22, Dársena, 38180, España.
Sci Rep. 2025 Feb 1;15(1):3961. doi: 10.1038/s41598-025-87116-2.
Tuna, due to their position in the food web, serve as excellent biomonitors for assessing the health of marine ecosystems. Analyzing their organs and tissues provides valuable insight into element concentrations, as tuna possess the capacity to bioaccumulate pollutants. In the present study, 12 trace elements and metals (Al, B, Cd, Co, Cr, Cu, Fe, Li, Mo, Ni, Pb, Zn) were analyzed in dorsal fin spines samples of four tuna species: Katsuwonus pelamis, Thunnus albacares, Thunnus obesus and Thunnus thynnus from individuals captured in the surrounding waters of the Canary Islands, between 1990 and 2007. To analyze the data, descriptive statistics and one-way and two-way PERMANOVAs were carried out, with species factor and decade-species as factors, respectively. The highest concentrations were recorded for the elements: Al, Fe, B and Zn, with greater significant differences between species in the concentrations of Cu, and in both decades, in Fe, Pb and Zn. The comparison of the concentrations of elements between decades showed a decrease in them, from the 90s to the 2000s. There is no similar information on the metal content in spines for these species, providing relevant information, which may be of interest to future studies.
金枪鱼因其在食物网中的位置，是评估海洋生态系统健康状况的优秀生物监测指标。分析它们的器官和组织能为元素浓度提供有价值的见解，因为金枪鱼具有生物累积污染物的能力。在本研究中，对1990年至2007年期间在加那利群岛周边海域捕获的四种金枪鱼（鲣、黄鳍金枪鱼、大眼金枪鱼和蓝鳍金枪鱼）背鳍棘样本中的12种微量元素和金属（铝、硼、镉、钴、铬、铜、铁、锂、钼、镍、铅、锌）进行了分析。为分析数据，分别进行了描述性统计以及以物种和年代 - 物种为因素的单向和双向多变量方差分析（PERMANOVA）。记录到元素铝、铁、硼和锌的浓度最高，铜浓度在物种间差异更大，在两个年代中，铁、铅和锌的浓度差异也更大。不同年代元素浓度的比较显示，从20世纪90年代到21世纪初，它们的浓度有所下降。关于这些物种背鳍棘中金属含量没有类似信息，本研究提供了相关信息，可能对未来研究有参考价值。
