Fundación Malpelo y Otros Ecosistemas Marinos, Parques Nacionales Naturales de Colombia, Carrera 11 # 87-51, Bogotá, Colombia; Departamento de Ecología y Territorio, Facultad de Estudios Ambientales y Rurales, Pontificia Universidad Javeriana, Transversal 4 # 42-00, Bogotá, Colombia.
Fundación Malpelo y Otros Ecosistemas Marinos, Parques Nacionales Naturales de Colombia, Carrera 11 # 87-51, Bogotá, Colombia.
Mar Pollut Bull. 2021 Dec;173(Pt B):113109. doi: 10.1016/j.marpolbul.2021.113109. Epub 2021 Nov 5.
Sharks are fished for human consumption in Colombia, and fins are exported illegally to international markets. The goal was to identify differences in total mercury (THg) concentrations in fins and muscles of shark species seized in the Buenaventura port (Colombian Pacific), and to assess potential human health risks related to shark consumption. Seven species were considered in this study: Pelagic Thresher (Alopias pelagicus), Pacific Smalltail Shark (Carcharhinus cerdale), Brown Smoothhound (Mustelus henlei), Sicklefin Smoothhound (Mustelus lunulatus), Scalloped Bonnethead (Sphyrna corona), Scalloped Hammerhead (Sphyrna lewini), and Bonnethead Shark (Sphyrna tiburo), and THg was analyzed in shark tissues. 24% muscle samples concentrations were above international recommended limits for human consumption, especially for A. pelagicus and S. lewini. Stable isotopes (δC and δN) analysis showed a foraging overlapping in coastal habitats, where overfishing usually occurs. This study provides useful scientific information to develop management plans for sharks in Colombia and neighboring countries.
在哥伦比亚，人们捕捞鲨鱼供人类食用，鱼鳍被非法出口到国际市场。本研究的目的是确定在布埃纳文图拉港（哥伦比亚太平洋）缴获的鲨鱼物种的鳍和肌肉中的总汞（THg）浓度差异，并评估与鲨鱼消费相关的潜在人类健康风险。本研究考虑了七种物种：远洋长尾鲨（Alopias pelagicus）、太平洋小尾鲨（Carcharhinus cerdale）、布朗光滑鲨（Mustelus henlei）、镰刀鳍光滑鲨（Mustelus lunulatus）、斜纹斑纹鲨（Sphyrna corona）、斜纹锤头鲨（Sphyrna lewini）和宽纹虎鲨（Sphyrna tiburo），并分析了鲨鱼组织中的 THg。24%的肌肉样本浓度高于国际推荐的人类食用限量，尤其是 A. pelagicus 和 S. lewini。稳定同位素（δC 和 δN）分析表明，在沿海栖息地存在觅食重叠，过度捕捞通常发生在这些栖息地。本研究为哥伦比亚和邻国制定鲨鱼管理计划提供了有用的科学信息。
