Laboratório de Ecotoxicologia e Microbiologia Ambiental, Campus Cabo Frio/Instituto Federal Fluminense, Cabo Frio, RJ, Brazil.
Departamento de Bioquímica - Instituto de Química, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil.
Environ Monit Assess. 2018 Aug 31;190(9):564. doi: 10.1007/s10661-018-6910-1.
Tropical coastal lagoons are highly productive environments exhibiting high biodiversity. However, the use of these ecosystems by local communities is of concern, since this generally leads to environmental degradation. The Imboassica coastal lagoon, located in Macaé city, in Northern Rio de Janeiro, is an important ecosystem in the state, however, already displaying signs of anthropogenic impacts. Carnivorous fish Hoplias malabaricus specimens were sampled from this impacted site, as well as from a reference area. Fish from Imboassica Lagoon presented lower condition factor, lower cholinesterase activity, and higher percentage of erythrocyte micronuclei when compared to fish from the reference site. Metals in fish from Imboassica Lagoon were always higher than Encantada Lagoon, with some seasonal differences, where some metals were higher in the rainy season compared to the dry season in muscle tissue, with the exception of Cu, Fe, Sr, and Zn; and in the liver, except for Ba, Cd, Cr, Ni, and Sr. Cr and Mn in the edible muscle portion of the fish were higher than the limits established by Brazilian and International legislations as permissible for human consumption, thus leading to concerns regarding public health risks for the local population that use fish as their main protein source.
热带沿海泻湖是高生物多样性的高生产力环境。然而，当地社区对这些生态系统的利用令人担忧，因为这通常会导致环境恶化。伊姆博阿西卡沿海泻湖位于里约热内卢州北部的马卡埃市，是该州的一个重要生态系统，但已经显示出人为影响的迹象。从受影响的地点和参考区域采集了肉食性鱼类巨脂鲤的样本。与来自参考区域的鱼类相比，来自伊姆博阿西卡泻湖的鱼类的身体状况系数较低，胆碱酯酶活性较低，红细胞微核率较高。伊姆博阿西卡泻湖鱼类中的金属含量总是高于恩坎塔达泻湖，存在一些季节性差异，在肌肉组织中，某些金属在雨季比旱季更高，除了铜、铁、锶和锌；而在肝脏中，除了钡、镉、铬、镍和锶。鱼类可食用肌肉部分的铬和锰含量高于巴西和国际法规规定的可接受人类食用的限量，因此对当地以鱼类为主要蛋白质来源的居民的公共健康风险表示担忧。
