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Tuesday, January 30 • 6:00pm - 9:00pm
Poster Display. Daily Growth of Young-of-year Silver Carp (Hypophthalmichthys molitrix) in the Wabash River, Indiana

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AUTHORS: Joshua Heishman, Purdue University Department of Biological Sciences; Brandon Peoples, Clemson University Department of Forestry & Environmental Conservation; Reuben R. Goforth, Purdue University Department of Forestry & Natural Resources

ABSTRACT: Understanding the factors that contribute to organismal invasiveness is crucial for curbing the spread of invasive species. Silver Carp Hypophthalmichthys molitrix are a prominent invasive fish in Mississippi River basin (USA). Rapid growth rates of adult Silver Carp are believed to contribute to their prolific success. However, growth rates of young-of-year (YOY) Silver Carp remain unquantified. In this study, we used posteriolateral scales to estimate daily growth rates of YOY Silver Carp in the Wabash River, a major tributary to the Ohio River in Indiana. Although useful for ageing Hypophthalmichthys spp. in other studies, we found postcleithra and sagittal otoliths lack proper resolution for daily age estimation of YOY Silver Carp. Scale-based analysis suggested that YOY Silver Carp exhibited rapid daily growth rates, which averaged 3.6±0.07 mm per day. Linear mixed models (accounting for variation among individuals) revealed that daily growth rates were more closely related to maximum daily temperature (pp=0.1743). This study fills a key gap in the knowledge of Hypophthalmichthys daily growth rates. Future studies relating body depth-at-length of YOY Silver Carp to length-based gape limits of native predatory fishes will add mechanism to role played by rapid growth rates in this highly invasive species. 

Tuesday January 30, 2018 6:00pm - 9:00pm CST
Ballroom C & Foyer

Attendees (3)