Silver Carp are a non-native fish species that have deleterious effects on the ecosystems they invade. Because of their destructive nature, fisheries managers devote substantial time and effort to limit the spread of these fishes. Better understanding patterns of Silver Carp reproduction and dispersal can help to better manage this invader. To determine spawning locations, we used drift nets and larval push nets in three tributaries the Wabash River to capture larval Hypophthalmichthys (Silver and Bighead Carp) in 2016 and 2017. Further, we used microsatellite loci to determine if genetic differences existed between larval Hypophthalmichthys in our three study tributaries. In total, 1,246 Hypophthalmichthys were collected from three tributaries, with the Little Wabash River and Embarras River producing roughly 83% and 16% of larvae. Having large enough sample sizes at two sites on the Little Wabash River and one site on the Embarras River, we performed genetic analyses and found all three sites had high levels of genetic diversity. Additionally, we found minimal inbreeding or outbreeding present. The middle Little Wabash and lower Embarras River samples were found to be genetically different. We expect this research to improve our understanding of Asian carp reproduction and help fisheries professionals to better mediate their spread.
|Original language||English (US)|
|Title of host publication||Midwest Fish and Wildlife Conference 2019|
|State||Published - 2019|