Recruitment sources of invasive Bighead carp (Hypopthalmichthys nobilis) and Silver carp (H. molitrix) inhabiting the Illinois River
Recruitment sources of invasive Bighead carp (Hypopthalmichthys nobilis) and Silver carp (H. molitrix) inhabiting the Illinois River
复制标题
栖息在伊利诺伊河的入侵性鳙鱼 (Hypopthalmichthys nobilis) 和鲢鱼 (H. molitrix) 的补充来源
DOI：
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发表时间：
2015
影响因子：
2.9
通讯作者：
G. Whitledge
中科院分区：
文献类型：
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作者：
Jacob D. Norman;G. Whitledge
摘要了解栖息在伊利诺伊河的入侵鲤鱼(Hypopthalmichthys Nobilis)和鲟鱼(H.molitrix)的出生环境和扩散情况，将有助于指导旨在补充芝加哥卫生和航运运河电气屏障的种群减少工作，并限制这些物种入侵五大湖的可能性。然而，在多大程度上，伊利诺伊河中的大鲤鱼和鲟鱼(统称为大头鱼)种群是从来自伊利诺伊河本身的新成员而不是来自密西西比河和密苏里河的移民获得的。众所周知，大头鱼在早期生活中也会利用连通的泛滥平原湖泊，但这些栖息地对伊利诺伊河中的大头鱼和银鱼的补充作用也是未知的。本研究的目的是利用耳石岩芯的稳定同位素和微量元素分析来鉴定2010-2011年间从伊利诺伊河采集的成鱼的出生环境。水和耳石锶钙比值(锶：钙)和水和耳石氧同位素比值(以δ18O表示)与已知来源的鲟鱼有很强的相关性，这与其他鱼类的情况一致。
大多数从伊利诺伊河采集的鲤鱼在早期生活时使用河道，而不是泛滥平原湖的栖息地。大多数成鱼起源于伊利诺伊河，尽管11%-39%是来自密苏里河或密西西比河中部的移民。相比之下，97%的鲤鱼起源于伊利诺伊河。我们的结果表明，大幅减少伊利诺伊河流域鲤鱼丰度的努力应该继续集中在伊利诺伊河本身，但很可能需要扩大到包括密西西比河中部和密苏里河，以可持续地控制鲟鱼。
AbstractKnowledge of natal environments and dispersal of invasive Bighead carp (Hypopthalmichthys nobilis) and Silver carp (H. molitrix) inhabiting the Illinois River would be valuable for directing population reduction efforts intended to supplement electrical barriers in the Chicago Sanitary and Ship Canal and limit the probability of these species invading the Great Lakes. However, the extent to which Bighead carp and Silver carp (collectively referred to as bigheaded carps) stocks in the Illinois River are derived from recruits that originate within the Illinois River itself versus immigrants from the Mississippi and Missouri rivers is unknown. Bigheaded carps are also known to use connected floodplain lakes during early life, but the contribution of these habitats to recruitment of Bighead and Silver carps in the Illinois River is also unknown. The aim of this study was to identify natal environment of adult bigheaded carps collected from the Illinois River during 2010–2011 using stable isotope and trace element analyses of otolith cores. Both water and otolith strontium:calcium ratios (Sr:Ca) and water and otolith oxygen isotope ratios (expressed as δ18O) were strongly correlated for known-origin bigheaded carps, consistent with other fish species.
Most Bighead and Silver carps collected from the Illinois River used river channel rather than floodplain lake habitats during early life. The majority of adult Silver carp originated in the Illinois River, although 11–39 % were immigrants from the Missouri or middle Mississippi Rivers. In contrast, 97 % of the Bighead carp originated in the Illinois River. Our results indicate that efforts to substantially reduce abundance of bigheaded carps in the Illinois River drainage should continue to focus on the Illinois River itself, but will likely need to be expanded to include the middle Mississippi and Missouri Rivers for sustainable control of Silver carp.