Abstract：
Rainbow smelt (Osmerus mordax) have been introduced widely but are associated with declines in walleye (Sander vitreus) recruitment. A primary hypothesis for these declines is that O. mordax consume larval S. vitreus. We confirmed overlapping spatial-temporal distributions of larval S. vitreus and O. mordax in our study system and used mtDNA analyses to determine if O. mordax stomach contents contained S. vitreus. Approximately 20% of O. mordax composite stomach samples were considered positive for S. vitreus consumption. These findings support the predation hypothesis and have S. vitreus management/stocking implications.
摘要：
彩虹冶炼(Osmerusmordax)已经被广泛引入，但与角膜白斑(Sandervitreus)招募的减少有关。这些下降的主要假设是O.mordax消耗幼虫。在我们的研究系统中，我们证实了幼虫玻璃体链球菌和O.mordax的重叠空间/时间分布，并使用线粒体DNA分析来确定O.mordax胃内容物是否含有玻璃体链球菌。大约20%的O.mordax复合胃样品被认为对玻璃体链球菌消耗呈阳性。这些发现支持捕食假说,并具有S.vitreus管理/库存影响。本文受版权保护。保留所有权利。
