Morrison R John, Peshut Peter J, West Ronald J, Lasorsa Brenda K
School of Earth and Environmental Sciences, University of Wollongong, Australia.
School of Earth and Environmental Sciences, University of Wollongong, Australia; Nimbus Environmental Services, PO Box 72, Hilo, HI 96721, USA.
Mar Pollut Bull. 2015 Jul 15;96(1-2):41-56. doi: 10.1016/j.marpolbul.2015.05.049. Epub 2015 May 28.
We investigated Hg in muscle tissue of fish species from three trophic levels on fringing reefs of Tutuila (14°S, 171°W), plus water, sediment and turf alga. Accumulation of total Hg in the herbivore Acanthurus lineatus (Acanthuridae, lined surgeonfish, (n=40)) was negligible at 1.05 (±0.04) ng g(-1) wet-weight, (∼65% occurring as methyl Hg). The mid-level carnivore Parupeneus spp. (Mullidae, goatfishes (n=10)) had total Hg 29.8 (±4.5) ng g(-1) wet-weight (∼99% as methyl Hg). Neither A. lineatus or Parupeneus spp. showed a propensity to accumulate Hg based on body size. Both groups were assigned a status of "un-restricted" for monthly consumption limits for non-carcinogenic health endpoints for methyl Hg. The top-level carnivore Sphyraena qenie (Sphyraenidae, blackfin barracuda, n=3) had muscle tissue residues of 105, 650 and 741 ng g(-1) wet-weight (100% methyl Hg, with increasing concentration with body mass, suggesting that S. qenie >15 kg would have a recommendation of "no consumption".
我们研究了图土伊拉岛（南纬14°，西经171°）边缘礁三个营养级的鱼类肌肉组织中的汞，以及水、沉积物和草皮藻中的汞。食草性的条纹刺尾鱼（刺尾鱼科，条纹刺尾鱼，n = 40）肌肉组织中的总汞含量极低，为1.05（±0.04）纳克/克湿重（约65%为甲基汞）。中级食肉性的副绯鲤属鱼类（羊鱼科，羊鱼，n = 10）的总汞含量为29.8（±4.5）纳克/克湿重（约99%为甲基汞）。条纹刺尾鱼和副绯鲤属鱼类均未表现出根据体型积累汞的倾向。对于甲基汞非致癌健康终点的每月消费限量，这两组鱼均被判定为“不受限制”。顶级食肉性的黑鳍魣（魣科，黑鳍魣，n = 3）的肌肉组织残留量分别为105、650和741纳克/克湿重（100%为甲基汞），且随着体重增加浓度上升，这表明体重超过15千克的黑鳍魣建议“禁止食用”。
