Lake Us Swim

By: Susan Yu Mitcham-PAP Bio-6

Objectives - Perch Dissection

In this lab, students will learn about the placements of the organs in relationship to the whole organ system. The system that the students will focus on is the circulatory system of the perch. There will also be many other information about the perch that the students will be about to learn by reading till the end of this poster.

About the Perch

The perch are carnivorous fish that are most commonly found in small ponds, lakes, streams, or rivers. These fish feed on smaller fish, shellfish, or insect larvae. Perch also has many predators such as the Largemouth Bass, Smallmouth Bass, Black Crappie, Channel Catfish, Chain Pickerel, Walleye, and Bluegill.Since perches can adapt to their environments so quickly and successfully, the perch basically takes over any rivers or lakes once they are introduced. Perch is a common name for all the different kinds of diverse perches. And each of these Perches have their own scientific names. These fishes has caudal fins that aid in forward movement, dorsal fins that orotect against rolling, pectoral fin that help swimming, anal that helps stabilizes the fish, and lastly pelvic that helps the fish with up down movement.

The KING Perch Fish Species

Anabas testudineus - Climbing perch
Perca fluviatilis - European perch
Perca schrenkii - Balkhash perch
Perca flavescens - Yellow perch
Macquaria ambigua - Golden perch
Bidyanus bidyanus - Silver perch
Leiopotherapon unicolor - Spangled perch
Morone americana - White perch
Diving Stoney Cove part 11 Swimming with Perch GoPro HD2
swimming perch

Circulatory System

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The circulatory system is consisted of a low pressure, single loop system. This means that the blood flows in only one direction, which is from the heart. Deoxygenated blood is pumped throughout the heart and to the gills. This is where blood becomes oxygenated, getting rid of carbon dioxide. From here, the blood goes straight to the rest of the body systems.

Dissection Pictures

Functions of the Organs


muscular organ helping blood to circulate


upper chambers of the heart that receives blood and turns it into the ventricles

ventral aorta

circulates the blood from the heart to the gills then on through the head + body


organ that extracts oxygen from the water

dorsal aorta

carries blood from the heart to the organs

jugular vein

carries blood from head to face


maintains the pressure of internal fluids


reproductive system; an egg-producing organ


breaks down food by enzymes and makes it into a liquid mixture which empties into the small intestine.


all the blood goes through it it is always processing food

External Anatomy

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Internal Anatomy

Perch Dissection
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Cladogram of Perch History

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Taxonomy of the Perch

Kingdom: Animalia

Phylum: Chordata

Superclass: Osteichthyes

Class: Actinopterygii

Subclass: Neopterygii

Infraclass: Teleosei

Order: Perciformes

Family: Percidae

Genus: Perca

Human Impact

Fisherman in Africa introduce the Nile perch, also known as Lates niloticus. to the fishing industry when they economy started to fail due to the small bony fishes that that they have in the area. So they decided to start a fish farm of the Nile perch because the Nile perch was one the larger fishes. The Nile perch was perfect for commercial fishing purposes. Nile perch adapted to its new home extremely successfully. Even though its population grew slowly at first. The population of the Nile perch soon boom during the 1960's and 1970's.Being a carnivorous fish, the Nile perch was proved to be devastating on the varied fish population. The Nile perch preyed on all the smaller fish in the area. And as the population of the Nile perch grew, the populations of the other species plummeted. Many of the endemic species went extinct entirely. Only the local people support the Nile perch farms, other see it as a threat because the ecosystem cannot remain stable with the overpowering amount of Nile perches.


Fred Kelly, the Severn Riverkeeper, began every spring fishing for Yellow Perch with his father. He continued the tradition with his son. Tragically, because of poor reproduction in recent years, it is now illegal for him to fish for Yellow Perch with his grandson.

Back in the 1930s Severn Run (the freshwater stream entering the head of the Severn) was the site of a DNR yellow perch hatchery, and the tidal Severn was known for its great yellow perch fishing up through the 1950s. After years of decline and unsuccessful attempts to restore the fishery by stocking, the DNR closed the Severn and neighboring rivers to yellow perch fishing. In May of 2005, the Maryland Department of Natural Resources released the Interim.A recent Yellow Perch Study implicates poor water quality as the cause of it decline in the Severn. Read more at:

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The BIG Perch Story

FLY TV - Fly fishing for big Perch

Perching for Interesting Facts

  • one of the MOST abundant fish species
  • OVER 6,000 species and 150 families
  • female are LARGER while males are DARKER
  • Shed their eggs in long gelatinous rows and wove UNDER tree roots or aquatic plants
  • Young fishes require GREEN water and egg yolk paste as first food

Work Cited

"Classification." BioScholars2nd -. N.p., n.d. Web. 09 Apr. 2014.

"Diving Stoney Cove Part 11 Swimming with Perch GoPro HD2." YouTube. YouTube, 02 July 2012. Web. 09 Apr. 2014.

"Perch Dissection." YouTube. YouTube, 17 Mar. 2013. Web. 08 Apr. 2014.

"Human Impacts on the Nile River: Foreign Species and Biodiversity." Human Impacts on the Nile River: Foreign Species and Biodiversity. N.p., n.d. Web. 10 Apr. 2014.

Sengupta, Saptakee., 19 May 2010. Web. 10 Apr. 2014.

"Yellow Perch." Yellow Perch. N.p., n.d. Web. 09 Apr. 2014.

"Swimming Perch." YouTube. YouTube, 19 Oct. 2008. Web. 09 Apr. 2014.

"Quizlet." Perch Circulatory System Flashcards. N.p., n.d. Web. 09 Apr. 2014.

"Scuba Diving - New Jersey & Long Island New York." - Dive Wreck Valley. N.p., n.d. Web. 09 Apr. 2014.