这项实验研究确定了无线电元素阵列的内部分布(54Mn,60Co,65Zn,134Cs,241Am,109Cd,110mAg,75Se和51Cr)由三种软岩鱼类(Scyliorhinuscanicula(狗鱼)从海水中积累,Rajaundulata(波状射线)和鱼雷(斑点鱼雷)和三种硬骨鱼(大菱螺(大菱螺),Sparusaurata(seabream)和Dicentrarchuslabrax(seabass))。该研究检验了以下假设:软骨鱼(软骨)鱼类分类群和硬骨鱼(骨)鱼类分类群在六个身体成分(头,消化道,肝脏,肾脏,皮肤和肌肉),与他们长期的进化分歧相一致。每个放射性元素的两个分类单元与整个放射性元素之间的身体成分CFs的比较显示,每个身体成分中的软骨和骨鱼之间存在高度显着差异(p≤0.001),证实了强烈而普遍的系统发育信号的存在;然而,这些差异的最决定性因素的放射性元素子集对于每个身体成分都是唯一的.三个单独的骨物种和三个单独的软骨物种之间的分配也在它们的身体成分中反复发生,特别是对于骨鱼。对于两种鱼类分类群,这些放射性元素在身体成分之间的分布通常是高度异质的。
This experimental study determined internal distributions of an array of radio-elements (54Mn, 60Co, 65Zn, 134Cs, 241Am, 109Cd, 110mAg, 75Se and 51Cr) accumulated from seawater by three chondrichthyan fish species (Scyliorhinus canicula (dogfish), Raja undulata (undulate ray) and Torpedo marmorata (spotted torpedo)) and three teleost species (Scophthalmus maximus (turbot), Sparus aurata (seabream) and Dicentrarchus labrax (seabass)). The study tested the hypothesis that the chondrichthyan (
cartilaginous) fish taxon and teleost (bony) fish taxon have different patterns of bioaccumulation of these radio-elements in six body components (head, digestive tract, liver, kidneys, skin and muscle), consistent with their long period of evolutionary divergence. Comparisons of body component CFs between the two taxa for each radio-element and the full array of radio-elements showed highly significant differences (p ≤ 0.001) between
cartilaginous and bony fishes in each body component, confirming the existence of a strong and pervasive phylogenetic signal; however, the subset of radio-elements most determinant of these differences were unique for each body component. Partitioning between the three individual bony species and the three individual
cartilaginous species also occurred repeatedly among their body components, particularly for bony fishes. Distributions of these radio-elements among body components were typically highly heterogeneous for both fish taxa.