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Eurasian Ruffe

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by

Ponnila Sampath Kumar

on 2 October 2012

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Transcript of Eurasian Ruffe

Eurasian Ruffe Origin and Arrival How did the invasive species of Eurasian Ruffe end up in Michigan? Distinguishing Features and Behavior What does Eurasian Ruffe look like? Eating Habits What do they eat? Adaptation Why is the Eurasian Ruffe well adapted and thriving in Michigan? Harmful Effects What Harmful effects do they have on Michigan's ecosystem? Map of Eurasian Ruffe in Michigan and in United States. What is currently being done to control population? Control on Population By: Logan Knight and Ponnila Sampath-Kumar Eurasian Ruffe Originally found in fresh waters from parts of Eurasia then transported to the Great Lakes. Origin and Arrival Very slimy (when touched)
Grows quickly
No scales on head
Slightly Downturned Mouth
Many Sharp Spines
olive-brown to golden-brown on back, paler on the sides with yellowish white undersides Distinguishing Features and Behavior Crayfish
Small aquatic bugs and larvae
Dragonfly and Caddisfly larvae
Zooplankton
Water mites What do they eat? Map of Eurasian Ruffe in Michigan. Through ballast water:
For buoyancy, ships carry excess water at the bottom, but they also carry fish and plants which is one of the major ways species travel to different parts of the Earth. The Eurasian Ruffe are very versatile, so they easily adapt to any habitat.
They thrive well in Michigan because they prefer fresh bodies of water like rivers or lakes. Why are they well adapted in Michigan Because the ruffe have the ability to reproduce quickly, grow rapidly and survive in a wide range of environments, they can swiftly and effortlessly dominate an area. Harmful effects on michigan’s ecosystem Scientists think that increasing populations of Walleye and Northern Pike, fish that feed on ruffe, would be an easy way of eliminating their growing numbers.
But this method could also affect other ecosystems and species. Increased Predation What can you do? To prevent this, states are coming up with laws about using ballast water and scientists are trying to come up with other ways for ships to get more buoyancy. Ballast Water Management It is illegal to keep live ruffe.
If you’re fishing and you find a ruffe, you must not release it back into the water! WHAT CAN YOU DO?
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