Department of Fisheries and Wildlife, College of Agriculture and Natural Resources, Michigan State University, East Lansing, Michigan, USA.
Hammond Bay Biological Station, Great Lakes Science Center, U.S. Geological Survey, Millersburg, Michigan, USA.
J Fish Biol. 2020 Apr;96(4):1024-1033. doi: 10.1111/jfb.14295. Epub 2020 Mar 4.
The American eel (Anguilla rostrata) is an imperilled fish hypothesized to use conspecific cues, in part, to coordinate long-distance migration during their multistage life history. Here, holding water and tissue from multiple American eel life stages was collected and analysed for the presence, profile and concentration of bile acids. Distinct bile acid profiles were identified in glass, elver, yellow eel and silver eel holding waters using ultraperformance liquid chromatography high-resolution mass spectrometry and principal component analysis. Taurochenodeoxycholic acid, taurodeoxycholic acid, cholic acid, deoxycholic acid, taurolithocholic acid and taurocholic acid were detected in whole tissue of American glass eels and elvers, and in liver, intestine and gallbladder samples of late-stage yellow eels. Bile acids were not a major component of silver eel washings or tissue. This study is novel because little was previously known about bile acids produced and emitted into the environment by American eels. Future behavioural studies could evaluate whether any bile acids produced by American eels influence conspecific migratory behaviour.
美洲鳗（Anguilla rostrata）是一种濒危鱼类，据推测，它们在多阶段的生活史中，部分依靠同种鱼类的线索来协调长距离迁徙。在这里，收集了多个美洲鳗生活阶段的水和组织样本，并分析了胆汁酸的存在、特征和浓度。使用超高效液相色谱-高分辨率质谱和主成分分析，在玻璃鳗、幼鳗、黄鳗和银鳗的养殖水中确定了不同的胆汁酸特征。牛磺鹅脱氧胆酸、胆脱氧胆酸、胆酸、脱氧胆酸、石胆酸和胆酸在美洲玻璃鳗和幼鳗的整个组织中，以及晚期黄鳗的肝、肠和胆囊样本中均有检测到。胆汁酸不是银鳗冲洗液或组织的主要成分。本研究具有创新性，因为此前人们对美洲鳗产生并排放到环境中的胆汁酸知之甚少。未来的行为研究可以评估美洲鳗产生的任何胆汁酸是否会影响同种鱼类的迁徙行为。
