Perch Dissection: Circulatory

Nelson Ly, Period 4, Guzman

Objective

By dissecting the perch, we are expected to learn the placement of the organs and their relationships to each other.

Background Information

  • Scientific Name: Perca
  • Habitat: Freshwater ponds, lakes, rivers (etc.)
  • Predators: Larger fish, other perch, birds, and reptiles.
  • Prey: Worms, small fish, nymphs and larvae, as well as many of their own small perch
  • Ecological Niche: Carnivorous and prey
  • Ecological Adaptations: Large sharp spines, powerful jaws and strong teeth, and rough scales

Pictures/ Videos

Bony Fish (Perch) Anatomy

Interesting Facts

  • Their anal, pelvic, and pectoral fins are red to orange, and are brightest in males during the mating season.
  • Their anal fin features two long and slender spines.
  • There are many different types and varieties of perches.
  • Perch have many small teeth.
  • The sides of the yellow perch are golden yellow to brassy green with six to eight dark vertical saddles and a white to yellow belly.

Circulatory System Focus

The circulatory system of a perch is a low pressure single type system that has a heart that has one atrium and ventricle. The deoxygenated blood is pumped through the heart and into the gills. After this, it is then oxygenated and sent back through the body of the perch. When the perch breathes, you could see lines at where the blood goes through which 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 then sends nutrients throughout the body. The digestive and circulatory systems work together to distribute nutrients throughout the body.

Cross Unit Content

Evolution

A few adaptations of a perch would be the mucous, fins, gills, and so on. Mocous helps the perch escape faster, fins help the perch swim, and the gills help the perch breathe underwater.

Taxonomy

Kingdom: Animalia

Phylum: Chordata

Class: Actinopterygii

Order: Perciformes

Family: Percidae

Genus: Perca

Species: Perca Flavescens (Yellow Perch)

Human Impact

Perch has no impact on humans so far, other than being a meal.