A Day in the Life of a Perch

How Does a Perch's Blood Circulate?

Objectives

Examine the internal structure of a perch whilst learning and understanding its' circulatory system.

All About the Perch

The perch or perca is known to live in freshwater areas with moderate amounts of vegetation for food and protection. They are found nearshore and in many lakes and rivers. They live on the Atlantic Coast stretching from South Carolina all the way to Nova Scotia. Young perch and larva will stay along tributaries but will eventually migrate offshore because of predators. Perch fish feed on insect larvae, curstaceans, and small fish. Young perch feed on zooplankton and algae. Perch aren't only predators, but also prey to many larger fish like Bass, Black Crappie, Channel Catfish, and Bluegills. Many birds also prey on perch. Birds like herons, gulls, and eagles. Perch may have many predators, but they are master adapters. Perch are very tolerant fish that adjust easily to low oxygen levels as well as low temperatures. This allows them to live in deep water where there are less predators. When it is dark, perch swim to the bottom and remain still. Perch have adapted to cold temperatures and are able to withstand winterkill conditions. This may be a blessing and a curse because perch have become very popular with fisherman in the wintertime. The perch serves as both predator and prey and aids in population control for insects as well as crustaceans and small fish.

The Journey of Blood Through a Perch

The circulatory system of a perch varies from our own in two ways. One perch have a two-chambered heart while humans have a four-chambered heart. Perch also have a one-way street when it comes to blood circulation so to speak. They don't have separate paths for deoxygenated and oxygenated oxygen. The journey begins with deoxygenated blood getting oumoed into the sinus venosus. The blood then enters the atrium, then the ventricle. From the ventricle, the blood is pumped into a tube called the

bulbus arteriosus. From there is reaches the aorta and passes through the gills which will oxygenate the blood. The oxygenated blood is then transported throughout the body via blood vessels.

Works Cited

"Action Items." Fish Facts. N.p., n.d. Web. 07 Apr. 2014. <http://www.dnr.state.md.us/fisheries/fishfacts/yellowperch.asp>.

Bora, Chandramita. Buzzle.com. Buzzle.com, 01 Oct. 2011. Web. 08 Apr. 2014. <http://www.buzzle.com/articles/circulatory-system-of-a-fish.html>.

N.d. Http://www.savalli.us/BIO370/Anatomy/3.PerchDissectionLabel.html. Web.

Perch Dissection