Programa Doctorado en Ciencias Biológicas, Facultad de Biología, Universidad Autónoma de Sinaloa, Culiacán, Sinaloa, Mexico.
Instituto Politécnico Nacional, CIIDIR-SINALOA, Guasave, Sinaloa, Mexico.
Environ Sci Pollut Res Int. 2021 Jun;28(23):29998-30006. doi: 10.1007/s11356-021-12819-8. Epub 2021 Feb 12.
Trace metals have been found in sea turtle blood and tissues and may represent a threat to these endangered species. Essential trace metal (Cu, Zn Cd, Pb, As, and Hg) concentrations were determined in blood of adult female, post-nesting olive ridley turtles Lepidochelys olivacea (n = 35) on Ceuta beach, Sinaloa, Mexico. Essential metals (Zn and Cu) analyzed were found in higher concentrations than toxic metals (Cd and Pb), while As and Hg concentrations were below the limits of detection (0.01 μg g). Low Pb concentrations (0.09 μg g) were previously observed in sea turtles in the Gulf of California. There were no significant correlations found between curved carapace length (61.00-71.00 ± 2.29) vs metal concentrations (p > 0.05). Cd levels were relatively high when compared to other species and populations of sea turtles worldwide and Cd may represent the greatest risk for sea turtles in the Mexican Pacific. Such concentrations of Cd may pose a further risk to sea turtles through bioaccumulation from the nesting female to offspring which may affect embryo development.
痕量金属已在海龟血液和组织中被发现，这可能对这些濒危物种构成威胁。在墨西哥锡那罗亚州塞图拉海滩，对成年雌性、产卵后的橄榄绿海龟（Lepidochelys olivacea）（n = 35）的血液中进行了必需痕量金属（Cu、Zn、Cd、Pb、As 和 Hg）浓度的测定。分析的必需金属（Zn 和 Cu）浓度高于有毒金属（Cd 和 Pb），而 As 和 Hg 浓度低于检测限（0.01 μg g）。此前在加利福尼亚湾的海龟中也观察到低浓度的 Pb（0.09 μg g）。弯曲的甲壳长度（61.00-71.00 ± 2.29）与金属浓度之间未发现显著相关性（p > 0.05）。与世界其他海龟物种和种群相比，Cd 水平相对较高，Cd 可能对墨西哥太平洋的海龟构成最大风险。这种 Cd 浓度可能通过从产卵的雌性到后代的生物累积对海龟构成进一步的风险，这可能影响胚胎发育。
