Beat the Barrier

Beat the Barrier
Level: Super Sleuth

A good detective remembers the little details. As a Super Sleuth detective, use your memory to help Detective Barrier stop the Sea Lamprey from spreading to new water bodies. Read the "Sea Lamprey Barriers, New Technology Help Solve an Old Problem" fact sheet from the Great Lakes Fishery Commission and then close the window. Answer the following questions from memory.

1. Which barrier has a lip used to keep lampreys from using their suction-cup mouths to climb over the barrier?
A. Low-head Barrier
B. Adjustable-Crest Barrier
C. Velocity Barrier
D. Electrical Barrier

2. Which barrier has DC current running through it at places where lampreys attempt to pass?
A. Low-head Barrier
B. Adjustable-Crest Barrier
C. Velocity Barrier
D. Electrical Barrier

3. Which barrier creates areas of rapidly moving water, with surfaces that make it impossible for lampreys to attach?
A. Low-head Barrier
B. Adjustable-Crest Barrier
C. Velocity Barrier
D. Electrical Barrier

4. Which barrier has adjustable, inflatable crests that are raised only during sea lamprey spawning season?
A. Low-head Barrier
B. Adjustable-Crest Barrier
C. Velocity Barrier
D. Electrical Barrier

5. Which barrier has a jumping pool near to allow other fish to easily jump over the barrier?
A. Low-head Barrier
B. Adjustable-Crest Barrier
C. Velocity Barrier
D. Electrical Barrier

6. Which barrier remains lowered on the river bottom except during lamprey spawning season, as as result most fish can easily swim over the barrier?
A. Low-head Barrier
B. Adjustable-Crest Barrier
C. Velocity Barrier
D. Electrical Barrier

7. Which barrier doesn't prevent fish from swimming through it. Sea lampreys are poor swimmers who tire easily and cannot go through this barrier?
A. Low-head Barrier
B. Adjustable-Crest Barrier
C. Velocity Barrier
D. Electrical Barrier

8. Which barrier is computer-controlled and adjusts to the water level of the stream?
A. Low-head Barrier
B. Adjustable-Crest Barrier
C. Velocity Barrier
D. Electrical Barrier

9. Which barrier is the most common type of barrier used in the Great Lakes to prevent sea lamprey spawning?
A. Low-head Barrier
B. Adjustable-Crest Barrier
C. Velocity Barrier
D. Electrical Barrier

10. Which barrier is built in the stream bed and does not block the flow of water?
A. Low-head Barrier
B. Adjustable-Crest Barrier
C. Velocity Barrier
D. Electrical Barrier

This activity was adapted from "Beat the Barriers" created by Rosemary Nowak, Eden Elementary School as part of the Exotic Species Compendium of Activities to protect the Ecosystem (ESCAPE) project funded by National Sea Grant College Program.

Detective ID | Detective Thumb-a-Ride | Detective EcoFriend | Detective Dollars and Sense | Detective Barrier

1. Which barrier has a lip used to keep lampreys from using their suction-cup mouths to climb over the barrier?
A. Low-head Barrier
B. Adjustable-Crest Barrier
C. Velocity Barrier
D. Electrical Barrier

2. Which barrier has DC current running through it at places where lampreys attempt to pass?
A. Low-head Barrier
B. Adjustable-Crest Barrier
C. Velocity Barrier
D. Electrical Barrier

3. Which barrier creates areas of rapidly moving water, with surfaces that make it impossible for lampreys to attach?
A. Low-head Barrier
B. Adjustable-Crest Barrier
C. Velocity Barrier
D. Electrical Barrier

4. Which barrier has adjustable, inflatable crests that are raised only during sea lamprey spawning season?
A. Low-head Barrier
B. Adjustable-Crest Barrier
C. Velocity Barrier
D. Electrical Barrier

5. Which barrier has a jumping pool near to allow other fish to easily jump over the barrier?
A. Low-head Barrier
B. Adjustable-Crest Barrier
C. Velocity Barrier
D. Electrical Barrier

6. Which barrier remains lowered on the river bottom except during lamprey spawning season, as as result most fish can easily swim over the barrier?
A. Low-head Barrier
B. Adjustable-Crest Barrier
C. Velocity Barrier
D. Electrical Barrier

7. Which barrier doesn't prevent fish from swimming through it. Sea lampreys are poor swimmers who tire easily and cannot go through this barrier?
A. Low-head Barrier
B. Adjustable-Crest Barrier
C. Velocity Barrier
D. Electrical Barrier

8. Which barrier is computer-controlled and adjusts to the water level of the stream?
A. Low-head Barrier
B. Adjustable-Crest Barrier
C. Velocity Barrier
D. Electrical Barrier

9. Which barrier is the most common type of barrier used in the Great Lakes to prevent sea lamprey spawning?
A. Low-head Barrier
B. Adjustable-Crest Barrier
C. Velocity Barrier
D. Electrical Barrier

10. Which barrier is built in the stream bed and does not block the flow of water?
A. Low-head Barrier
B. Adjustable-Crest Barrier
C. Velocity Barrier
D. Electrical Barrier

This activity was adapted from "Beat the Barriers" created by Rosemary Nowak, Eden Elementary School as part of the Exotic Species Compendium of Activities to protect the Ecosystem (ESCAPE) project funded by National Sea Grant College Program.

1. Which barrier has a lip used to keep lampreys from using their suction-cup mouths to climb over the barrier? A. Low-head Barrier B. Adjustable-Crest Barrier C. Velocity Barrier D. Electrical Barrier

2. Which barrier has DC current running through it at places where lampreys attempt to pass? A. Low-head Barrier B. Adjustable-Crest Barrier C. Velocity Barrier D. Electrical Barrier

3. Which barrier creates areas of rapidly moving water, with surfaces that make it impossible for lampreys to attach? A. Low-head Barrier B. Adjustable-Crest Barrier C. Velocity Barrier D. Electrical Barrier

4. Which barrier has adjustable, inflatable crests that are raised only during sea lamprey spawning season? A. Low-head Barrier B. Adjustable-Crest Barrier C. Velocity Barrier D. Electrical Barrier

5. Which barrier has a jumping pool near to allow other fish to easily jump over the barrier? A. Low-head Barrier B. Adjustable-Crest Barrier C. Velocity Barrier D. Electrical Barrier

6. Which barrier remains lowered on the river bottom except during lamprey spawning season, as as result most fish can easily swim over the barrier? A. Low-head Barrier B. Adjustable-Crest Barrier C. Velocity Barrier D. Electrical Barrier

7. Which barrier doesn't prevent fish from swimming through it. Sea lampreys are poor swimmers who tire easily and cannot go through this barrier? A. Low-head Barrier B. Adjustable-Crest Barrier C. Velocity Barrier D. Electrical Barrier

8. Which barrier is computer-controlled and adjusts to the water level of the stream? A. Low-head Barrier B. Adjustable-Crest Barrier C. Velocity Barrier D. Electrical Barrier

9. Which barrier is the most common type of barrier used in the Great Lakes to prevent sea lamprey spawning? A. Low-head Barrier B. Adjustable-Crest Barrier C. Velocity Barrier D. Electrical Barrier

10. Which barrier is built in the stream bed and does not block the flow of water? A. Low-head Barrier B. Adjustable-Crest Barrier C. Velocity Barrier D. Electrical Barrier

This activity was adapted from "Beat the Barriers" created by Rosemary Nowak, Eden Elementary School as part of the Exotic Species Compendium of Activities to protect the Ecosystem (ESCAPE) project funded by National Sea Grant College Program.

1. Which barrier has a lip used to keep lampreys from using their suction-cup mouths to climb over the barrier?
A. Low-head Barrier
B. Adjustable-Crest Barrier
C. Velocity Barrier
D. Electrical Barrier

2. Which barrier has DC current running through it at places where lampreys attempt to pass?
A. Low-head Barrier
B. Adjustable-Crest Barrier
C. Velocity Barrier
D. Electrical Barrier

3. Which barrier creates areas of rapidly moving water, with surfaces that make it impossible for lampreys to attach?
A. Low-head Barrier
B. Adjustable-Crest Barrier
C. Velocity Barrier
D. Electrical Barrier

4. Which barrier has adjustable, inflatable crests that are raised only during sea lamprey spawning season?
A. Low-head Barrier
B. Adjustable-Crest Barrier
C. Velocity Barrier
D. Electrical Barrier

5. Which barrier has a jumping pool near to allow other fish to easily jump over the barrier?
A. Low-head Barrier
B. Adjustable-Crest Barrier
C. Velocity Barrier
D. Electrical Barrier

6. Which barrier remains lowered on the river bottom except during lamprey spawning season, as as result most fish can easily swim over the barrier?
A. Low-head Barrier
B. Adjustable-Crest Barrier
C. Velocity Barrier
D. Electrical Barrier

7. Which barrier doesn't prevent fish from swimming through it. Sea lampreys are poor swimmers who tire easily and cannot go through this barrier?
A. Low-head Barrier
B. Adjustable-Crest Barrier
C. Velocity Barrier
D. Electrical Barrier

8. Which barrier is computer-controlled and adjusts to the water level of the stream?
A. Low-head Barrier
B. Adjustable-Crest Barrier
C. Velocity Barrier
D. Electrical Barrier

9. Which barrier is the most common type of barrier used in the Great Lakes to prevent sea lamprey spawning?
A. Low-head Barrier
B. Adjustable-Crest Barrier
C. Velocity Barrier
D. Electrical Barrier

10. Which barrier is built in the stream bed and does not block the flow of water?
A. Low-head Barrier
B. Adjustable-Crest Barrier
C. Velocity Barrier
D. Electrical Barrier