Fisheries and Illinois Aquaculture Center, Southern Illinois University, Carbondale, IL 62901-6511, USA.
J Fish Biol. 2009 Dec;75(10):2606-14. doi: 10.1111/j.1095-8649.2009.02454.x.
The effect of digestion by a predatory fish (largemouth bass Micropterus salmoides) on stable isotopic (delta(13)C and delta(18)O) and trace elemental (Sr:Ca and Ba:Ca) compositions of prey fish (bluegill Lepomis macrochirus) otoliths was investigated in a laboratory experiment. Trace element and stable-isotopic signatures of L. macrochirus otoliths were not significantly altered for up to 16 h after L. macrochirus were consumed by M. salmoides. Prey fish otoliths recovered from predator digesta can retain environmental stable isotopic and trace elemental signatures, suggesting that determination of environmental history for prey fishes by stable-isotope and trace-element analysis of otoliths recovered from stomachs of piscivorous fishes will be feasible.
实验室实验研究了掠食性鱼类（大口黑鲈 Micropterus salmoides）对猎物鱼类（蓝鳃太阳鱼 Lepomis macrochirus）耳石的稳定同位素（δ¹³C 和 δ¹⁸O）和痕量元素（Sr:Ca 和 Ba:Ca）组成的消化作用的影响。在大口黑鲈捕食蓝鳃太阳鱼后长达 16 小时内，蓝鳃太阳鱼耳石的痕量元素和稳定同位素特征没有明显改变。从掠食性鱼类的消化道中回收的猎物鱼类耳石可以保留环境的稳定同位素和痕量元素特征，这表明通过从肉食性鱼类胃中回收的耳石进行稳定同位素和痕量元素分析，来确定猎物鱼类的环境历史是可行的。
