Empirical assessments of the influence of invasive species on native species are infrequent because the required long-term data are rarely available. The invasion of silver carp in the Upper Mississippi River System UMRS provides a unique opportunity to assess the influence of this invasive species on native fishes because a highly standardized, long-term monitoring program has been sampling the fish communities in six reaches of the UMRS for over 20 years. We analyzed fish abundance catch per unit effort from electrofishing and water-quality data collected from to from three reaches where silver carp populations have been established since , and three reaches where they are not established. Our results provide empirical evidence of a negative effect of invasive silver carp on native sport fish in the UMRS.
Bureaucratic Impediments to Collaboration: A Case Study of the Asian Carp and the Great Lakes Basin
An important method in the management of Asian carps is research. Research is on-going in this field to find more ways to prevent the arrival of, control, and eradicate these species. Scientists are focusing on a few key areas:. To understand the impacts of Asian carps, it is important to understand their biology and behaviour. Currently, there are no established populations in Canadian waters of the Great Lakes. To get a better understanding of the reproductive dynamics of Grass Carp, some were captured from western Lake Erie over a three-year period. Of the 60 captured,