Name_____________________________________________ Per_______ Date______________Perch Dissection

Pre-lab:1. Perch belong to which phylum?

2. Perch belong to what class of bony fish?

3. Are perch ray-finned or lobe-finned fish? Explain.

4. Name the fins found on a perch. What function(s) to the fins serve?

5. Give the function for the swim bladder.

6. Describe the external appearance of a yellow perch.

7. What is the scientific name for the yellow perch?

8. Name several organs that belong to the digestive system of the perch.

9. Where do perch live?

10. Where is the lateral line found & what is its job?

A. External Anatomy:1. Are there any eyelids present? _______. 2. Label the eye 3. What is the name of these flaps?

________________________ 4. What is their function?

__________________________ 5. Label the flaps 6. Label each fin 7. How many fins?

Caudal ____ Dorsal _____ Anal _____ Pelvic _____ Pectoral ____

8. Label the lateral line

B. Internal Anatomy: 1. Number of layers of gills ________2. Describe the feathery layers

3.

Questions and discussion:10. Are both jaws of the fish equally movable? Explain your answer.

11. How many gills are located on each side of the perch? What covering protects them?

12. What is the function of the gill rakers?

13. Explain how gas exchange occurs at the gills.

14. Which fin was the largest?

15. What other difference do you notice in this fin when it was compared to the others?

16. What was the sex of your fish?

17. Describe how the scales are arranged on the trunk & tail of your fish.