Perch Perch! Oh wait it's a fish.

Courtney Murphy; Mitcham; Pre-AP Bio; 2nd period

At a glance...

Perch (or Perca flavescens) are a member of the kingdom anamalia, the phylum Chordata, the class Actinopterygii, the order Perciformes, the family Percidae, and the genus Perca. They are a freshwater fish and their trophic level is primary consumer.
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Backround info

Yellow Perch Dissection
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Circulatory System Close-up

The circulatory system of a Perch is a low pressure, single loop system. This means that there is one direction of blood flow from the heart, which acts as a pump. Deoxygenated blood is pumped throughout the heart and goes onward to the gills. This is where the blood becomes oxygenated (the gills), getting rid of carbon dioxide. From here the blood goes straight to the body. Blood pumped from the heart in this type of circulation is purely deoxygenated.

There are five main components to the Perch’s circulatory system. The first is the two chambered heart which consists of four parts: sinus venosus, the atrium, the ventricle, and the bulbus arteriosus. The heart keeps the blood flowing and pumping through the fish keeping the blood circulating in a single loop. Fish are constantly moving or swimming to maintain blood pressure. There are only one ventricle and atrium in the Yellow Perch, creating two chambers. There are many arteries with in the Perch, these include: efferent branchial arteries, afferent branchial arteries, the ventral aorta, intestinal artery, gonadal artery, pneumatic artery, dorsal aorta, and the celiac artery. Blood enters the gills of the fish from the afferent branches of the ventral aorta. The aorta (ventral and dorsal) are the largest arteries in the fish, and distribute oxygenated blood. The veins inside the Yellow Perch consist of: the hepatic portal vein, intestinal vein, left posterior cardinal vein, and right posterior cardinal vein. Veins deliver deoxygenated blood to the heart. There are very many different nutrient rich capillaires branching off of the arteries and veins in the Yellow Perch. Capillaries are in charge of distributing oxygenated blood from arteries to the tissues of the body and to send deoxygenated blood from these tissues back into the veins. They are the smallest of these three types of blood vessels (arteries, veins, capillaries). The gills of the fish are extremely important to its circulation because this is where the blood becomes oxygenated.

Human Impact/Influences

Perch are one of the most commonly caught fish. And they are exceptional to eat too!

Perch are sought-after by fishermen both for sport and for food.

Perch also help people by controlling populations of other fish and aquatic animals.


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Cool facts!

  • The natural habitat of this fish ranges from Thailand, Sri Lanka, Indonesia, Malaysia, Vietnam, Southern China, Taiwan, Philippines and Cambodia. It is also found in Europe, Nigeria, Mississippi, South Carolina, Hudson Bay, Chesapeake Bay, Nova Scotia, and Atlantic coast.
  • Their lifestyle is known as semi-anadromous. They can be seen migrating to tidal water and brackish water
  • The female is of larger size while the male is distinguished as darker in color with edgy anal fin. They spawn in shallow water.
  • They often swim in schools.
  • They come into shallow water to feed at dawn and dusk.