Thermal and hydrologic suitability of Lake Erie and its major tributaries for spawning of Asian carps
Thermal and hydrologic suitability of Lake Erie and its major tributaries for spawning of Asian carps
复制标题
DOI：
10.1016/j.jglr.2011.11.015
复制
发表时间：
2012-03-01
影响因子：
2.2
通讯作者：
McKenna, James E.
中科院分区：
文献类型：
--
作者：
Kocovsky, Patrick M.;Chapman, Duane C.;McKenna, James E.
鳙鱼、银、鲢鱼、鲢鱼等。鲢鱼和草鱼Ctenopharyngodonidella（以下简称亚洲鲤鱼）已经扩展到整个密西西比河流域，并威胁要入侵密歇根湖和伊利湖。在伊利湖已经捕获了成年的鳙鱼和草鱼，但自我维持的种群可能不存在。我们研究了伊利湖内的热条件，以确定亚洲鲤鱼是否会成熟，并估计一年中鱼类达到产卵条件的时间。我们还研究了最大的支流西部和中央湖伊利的热量和水文条件是否适合亚洲鲤鱼产卵。我们使用的长度无坝河流，预测夏季温度，并预测洪水事件期间的水流速度，以确定是否有足够的长度的河流可用于亚洲鲤鱼产卵。我们检查的大多数河流至少有100公里的可通行河流和夏季温度适合（>21 C）亚洲鲤鱼卵的快速孵化。预测的水流速度和温度足以确保在水柱中漂流的孵化卵在到达伊利湖之前孵化，如果在上游足够远的地方产卵，大多数河流中的大多数洪水事件都会发生。莫米河、桑达斯基河和格兰德里弗斯被预测为最有可能支持亚洲鲤鱼产卵的河流。布莱克河、休伦河、波蒂奇河和朱红河预计不太适合。证据的重量表明，最大的西部和中央湖伊利支流的热量和水文适合支持亚洲鲤鱼产卵。Elsevier B.V.代表国际五大湖研究协会出版。
Bighead carp Hypophthalmichthys nobilis, silver carp H. molitrix, and grass carp Ctenopharyngodon idella (hereafter Asian carps) have expanded throughout the Mississippi River basin and threaten to invade Lakes Michigan and Erie. Adult bighead carp and grass carp have been captured in Lake Erie, but self-sustaining populations probably do not exist. We examined thermal conditions within Lake Erie to determine if Asian carps would mature, and to estimate time of year when fish would reach spawning condition. We also examined whether thermal and hydrologic conditions in the largest tributaries to western and central Lake Erie were suitable for spawning of Asian carps. We used length of undammed river, predicted summer temperatures, and predicted water velocity during flood events to determine whether sufficient lengths of river are available for spawning of Asian carps. Most rivers we examined have at least 100 km of passable river and summer temperatures suitable (>21 C) for rapid incubation of eggs of Asian carps. Predicted water velocity and temperature were sufficient to ensure that incubating eggs, which drift in the water column, would hatch before reaching Lake Erie for most flood events in most rivers if spawned far enough upstream. The Maumee, Sandusky, and Grand Rivers were predicted to be the most likely to support spawning of Asian carps. The Black, Huron, Portage, and Vermilion Rivers were predicted to be less suitable. The weight of the evidence suggests that the largest western and central Lake Erie tributaries are thermally and hydro-logically suitable to support spawning of Asian carps. Published by Elsevier B.V. on behalf of International Association for Great Lakes Research.