Perch Physiology

Clarise Trinh, Guzman - PAP Bio - P4

Big Catch

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Objectives

The objective of this perch dissection is to observe the placement of organs and their relationships with one another, learn in depth about the circulatory system of the perch, and examine the internal and external anatomy of the perch.
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Background Information

Scientific Name: Perca

Phylum: Chordata

Class: Osteichthyes

Perch are carnivorous fish found in ponds, lakes, streams, and rivers. They feed on smaller fish, shellfish, and insect larvae. Humans eat perch. Perch can be found all over the world, esp. in the Great Lakes. Their stripes are an adaptation for camouflage and help the perch hide in aquatic vegetation. Perch breed in the late spring, laying their eggs on soft vegetation. Perch have two dorsal fins, one spiny and the other soft-rayed.

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External Anatomy

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Bony Fish (Perch) Anatomy

Internal Anatomy

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Circulatory System

The circulatory system of a perch contains a heart that has one atrium and one ventricle (a 2 chambered heart). Deoxygenated blood is pumped through the heart to the gills, is oxygenated, and is sent back through the body to return back to the heart. Perch have a low pressure, single loop, closed circulatory system.
2012 Jumbo Perch Ice Fishing - Lake Simcoe

Fish Facts

Perch fish has a very long and strong spine

Perch also have spines over their gill covers that act as defensive mechanism.

Perch are very yummy

Perch are attracted to light

Males reach maturity at about 1-3 years of age, females at 2-3 years of age.

Perch are easy to catch and good to eat

Perch adult females can lay over 10,000 eggs during reproduction

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