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Asian carp case study data

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    Empirical assessments of the influence of invasive species on native species are infrequent because the required long-term data are rarely available. 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. Although water temperature, suspended solid concentration, and flooding also differed substantially between control and invaded reaches, only silver carp abundance had a direct negative relationship with the abundance of adult sport fish. In reaches where silver carp is established, recruitment of juvenile sport fish appears to be constrained relative to reaches where silver carp is not established. Although invasive species are an increasing global threat to ecosystems and the subject of much scientific inquiry, actual empirical assessments of the effects of invasive species on native species are relatively scarce because of the rarity of the long-term data needed to examine these effects while accounting for other drivers and anthropogenic stressors Capinha et al.
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    An Assessment of the Invasive Asian carp Threat on The Great Lakes – Environmental ScienceBites

    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,
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    2.1 An Assessment of the Invasive Asian carp Threat on The Great Lakes

    Over time, the Great Lakes have accumulated over aquatic non-native species. However, many species were introduced unintentionally through the transfer of live food fish, bait release, or the release of ballast water. Some species are disruptive because on their eating habits, rate of reproduction, and adaptability among other factors. These invasive species pose a threat to existing ecosystems and also to the economies of the region. The Great Lakes Basin is the largest source of freshwater in the world.
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