by Edward Cen Period 4 Mrs. Guzman
Students will be learning about the external and internal anatomy and structure of the perch through a dissection lab. Students will focus on the organs, structures, and functions of the circulatory system through diagrams. Students will also understand the ecological role of the perch in its environment.
Perches are a genus group Percha and contain many different specific types of perches such as white perch and yellow perch. Almost all perch are freshwater living and their habitat is generally either a lake or a river. Perches are vertebrates and are a member of the chordata phylum. Perch generally eat insects and mainly other fish, such as trouts, bass, sunfish, etc. Their main predators are also larger fish, birds, and mainly human fishing. A curious evolution of perch and fish in general is a "lateris" system of tiny hairs along the sides of the perch that allows it to feel water movement around it. This allows it to form an "image" of what its surroundings are like and it uses it to avoid bumping into terrain, even without direct vision.
Perch Food Web
The circulatory system of a perch consists of a relatively low pressure system with a 2-chamber heart: 1 ventricle and 1 atrium compared to 2 ventricles and 2 atrium for humans. The deoxygenated blood is pumped from the heart to the gills where it, along with the respiratory system and the gills, pump oxygen into the blood and the oxygenated blood circulates throughout the body before returning to the heart, deoxygenated again. The circulatory system includes arteries, veins, and capillaries; it is a closed system meaning the blood doesn't leave the circulatory system.
Perch are an important fishing supply for humans, there are multiple type of perch, white, yellow, etc and most live in lakes and freshwater locations. These perch are an important source of subsistence for many. Above, I have included a perch recipe in case you wish to try out a perch for yourself.
How to Catch Huge Lake Perch