When an object rests on a surface, such as a table, for example, the downward force it applies to the surface is counteracted by an equal but upwards force, or reaction, applied by the surface. See more at Newton's laws of motion. A response to a stimulus, such as a reflex.
State. Aquatic Invasive Species: Snakehead (PDF | 201 KB). Indiana Department of Natural Resources. Northern Snakehead. Maryland Department of Natural Resources. Northern Snakehead Fish (Channa argus). New York Department of Environmental Conservation.
Summary. Northern snakeheads (Channa argus) are a fish native to eastern Asia (Courtenay and Williams, 2004), and were recently introduced to North America. The first reproducing population was found in Crofton Pond, MD, in 2002 and was eradicated that year when Maryland DNR poisoned the pond with Rotenone.ummary. Northern snakeheads (Channa argus) are a fish native to eastern Asia (Courtenay and Williams, 2004), and were recently introduced to North America. The first reproducing population was found in Crofton Pond, MD, in 2002 and was eradicated that year when Maryland DNR poisoned the pond with Rotenone.