Fishy Tales

Perch dissection Pre-AP Biology March 13, 2014- Guzman

Objectives

The objective of this dissection is to learn more about the perch and it's internal organs.

Perca flavescens

The Perch (or the Yellow Perch in particular) is a freshwater, jawed fish. They belong to the kingdom Animalia under the phylum Chordata and the subphylum Vertebrata. The Perch mainly feeds on invertebrate, sometimes eating other perch and smaller fish. They are also hunted by large fish, like the trout and the bass. Since they are hunted, they need their mocous, which help them swim faster, but it can also help them catch their prey. Their gills is an adaptation that helps them breathe underwater, and their fins help them move forward.

Circulatory System

The circulatory system of a perch is a low pressure single type system that consists of a heart that has one atrium and ventricle. The deoxygenated blood is pumped through the heart and then to the gills. After this process, it is then oxygenated and sent back through the body of the perch. When the perch breathes, you may see lines at where the blood goes through. This shows that they need their blood to breathe.

The liver is also part of the circulatory system. After the small intestines pass on nutrients to the liver, the liver than sends nutrients throughout the body. The digestive and circulatory systems work together to distribute nutrients throughout the body.

Bony Fish (Perch) Anatomy

Know a lot about Perches? Try this quiz!