The life of a perch
perch dissection-PAPBio-3rd per
represented by: MOJDE YADOLLAHIKHALES
Adult yellow perch inhabit slow-moving, near-shore areas where moderate amounts of vegetation provide cover, food and protection.
yellow perch eggs hatch in about two weeks and it reach maturity in one to three years.
Yellow perch are widespread and good to eat. They provide forage for many other species of fish such as black crappie, channel cat fish or birds such as hawks and kingfishers.
Taxonomy & Evolutionary relation ships of perch
Fins- 2 dorsal fins, 2 pectoral fins, 2 pelvic fin, an anal fin, and a caudal fin
Gill Opening- where the water goes so that the fish can get its oxygen
Operculum- cover and protect the gills
Lateral Line- a sensory organ that has sacs filled with fluid with hair-like sensors that are open to the water through pores, it senses pressure, currents, and movement in the water
To expose internal organs, you should cut away part of its muscular wall.
Gills are behind the flap of skin, above heart. A perch has 3 layers of gills per side.
As with most fish, perch do not have eyelids. They are, however, covered by a layer of transparent integument or coating to keep the eye protected.
Dilated section of the digestive tract preceding the intestine; it receives food to be digested.
Air bladder contains gas and help the fish to maintain its depth without floating upward or sinking.
The heart consists of one atrium and one ventricle. Oxygen poor blood is pumped through the heart and into the lungs. Once the blood has been oxygenated it then goes directly to the tissues and back to the heart.
- Have a unique spawning method, the females release their eggs in long gelatinous strands that usually hang from vegetation
- Swim Bladder: the bladder can fill with air to help the fish float to the surface without swimming, and can deflate with air to help the fish float down without swimming