Questions and Answers
Perch belong to what class of bony fish?
Osteichthyes
Are perch ray-finned or lobe-finned fish?
ray-finned
Name the fins found on a perch.
pectoral fins, pelvic fin, anal fin, caudal fin, dorsal fins
What is the function of the pectoral fins?
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What is the function of the caudal fin?
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What is the function of the dorsal fins?
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What is the function of the pelvic fin?
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What is the function of the anal fin?
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Do the pectoral fins have spines?
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Location of the pectoral fins?
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Does the caudal fin have spines?
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Where is the caudal fin located?
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Do the dorsal fins have spines?
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Where are the dorsal fins located?
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Does the pelvic fin have spines?
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Where is the pelvic fin located?
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Does the anal fin have spines?
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Where is the anal fin located?
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Give the function of the swim bladder.
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Describe the external appearance of a yellow perch.
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What is the scientific name for the yellow perch?
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Describe spawning of yellow perch.
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Name several organs that belong to the digestive system.
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Describe the heart of a perch & explain blood flow through this organ.
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Are both jaws of the fish equally movable?
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Does the perch have eyelids?
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How many gills are located on each side of the perch?
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What covering protects the gills?
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What is the function of the gill rakers?
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Which fin is the largest?
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What is the function of the lateral line?
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Describe how the scales are arranged on the trunk & tail of the perch.
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Explain how the swim bladder controls buoyancy.
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Study Notes
Perch Classification
- Perch are classified under Osteichthyes, the class of bony fish.
- They are categorized as ray-finned fish.
Fins of Perch
- Fins present on a perch include pectoral fins, pelvic fin, anal fin, caudal fin, and dorsal fins.
- Pectoral fins control vertical movement.
- The caudal fin propels the fish through water.
- Dorsal fins stabilize the fish during swimming.
- Pelvic fins direct movement, while anal fins stabilize movement.
- Pectoral, caudal, and anal fins do not have spines; dorsal and pelvic fins possess spines.
- Pectoral and pelvic fins are located ventrally (on the underside), while the caudal fin is located posteriorly (at the back) and dorsal fins are found dorsally (on the back).
Buoyancy and Swim Bladder
- The swim bladder provides buoyancy, allowing the fish to control its depth in water.
- Changes in gas volume in the swim bladder adjust the fish's density, impacting buoyancy.
External Appearance
- Yellow perch exhibit golden yellow to brassy green coloration on their sides with 6 to 8 dark vertical saddles, and have a white to yellow belly.
Reproduction
- Spawning occurs from mid-April to early May, where eggs are released over vegetation or the water bottom without parental care.
Digestive System
- Key digestive organs include swim bladder, intestines, anus, stomach, pyloric caeca, pancreas, and urinary bladder.
Circulatory System
- The perch has a two-chambered heart, comprising an auricle and a ventricle, circulating blood through a closed system.
Jaws and Gills
- Only the lower jaw is movable, while the perch lacks eyelids.
- Each side of the perch has two gills, protected by opercula.
- Gill rakers help filter food particles, preventing debris from escaping through the gills.
Other Features
- The largest fin on a perch is the dorsal fin.
- The lateral line system detects water movement direction and rate.
- Scales on the trunk and tail overlap with the posterior end covering the anterior end of the next scale.
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Description
Test your knowledge on perch anatomy and classification with these flashcards. Learn about their fins, movement functions, and place in the bony fish class. Ideal for students studying marine biology or fish anatomy.
