Perks of Being a Perch

By Jennifer Lang Vu-Pap Bio-3

Objective

Today, students will learn about the structures of the perch and their functions. We will view the internal and external structures of the perch while we are dissecting. Remember to carefully observe the body parts of the perch and know how to name them.

Background Information-Perca flavescens

Species Perca flavescens

Genus Perca

Family Percidae

Order Perciformes

Class Actinopyerygil

Phylum Chordata

Kingdom Animalia


Perches live in freshwater areas. A Perch has a slender body shape, two dorsal fins, and one anal fin characterised by a greenish-yellow colour. It is a predator that hides in reeds and rushes to attack smaller fish as prey. The Perch is a long fish for its size, and can grow up to 15 inches long. A large one can weigh over four pounds, but they are usually much smaller.

Ecological Niche

Perch average adult length is 4-10 inches, with a weight of 4-10 ounces, although adult size is quite variable. Perch are prolific breeders, but growth and ultimate size depend on population density and habitat productivity. Male perch become mature at about three years of age, females at four. Perches can easily adapt to environments.

Body System- Circulatory

The Perch circulatory system has:

The Heart

The Afferent/Efferent/Renal/ Hepatic Branchial Artery

The Atrium

The Anterior/Posterior cardinal vein

The Hepativ portal vein

The Hepatic/Renal vein

The Ventricle



The circulatory system of a perch contains a heart that has one atrium and one ventricle. Deoxygenated blood is pumped through the heart to the gills. Then, it is being changed to oxygen and sent back through the body of the fish.This system is also known as the transport system. It is responsible for transporting oxygen and nutrients throughout the body. The perch has a single looped circulatory system and low blood pressure. The pressure is maintained by the swimming its constant moving habits. The blood of the perch moves from the heart to the lungs to the body and back to the heart, and to prevent the backflow of blood from occurring there are valves that keep the blood flow moving in one direction.

Perch Dissection.wmv

Human Impact

Perches are really delicious so a lot of people are eating them, but the perches are also eating away all the other small fishes. This makes it hard for people to gather a variety of food to eat.

FUN FACTS

-Perches are carnivorous. You wouldn't imagine such small and delicate fishes to eat meat!

-They use their fins as a defense when threatened. If there is an animal that they find dangerous, they would use their fins to protect themselves.

-The female perches release their eggs in long gelatinous strands that usually hang from vegetation.

Website for Images and Informations

http://quizlet.com/16683714/perch-circulatory-system-flash-cards/

https://www.google.com/search?q=circulatory+system+perch&espv=210&es_sm=122&source=lnms&tbm=isch&sa=X&ei=XdtEU_nmM4iA2gWU7IGYCA&ved=0CAgQ_AUoAQ&biw=911&bih=400#facrc=_&imgdii=_&imgrc=tCzQkqiOL7zijM%253A%3BCO6oL1cTstdEBM%3Bhttp%253A%252F%252Fmcgbiology.wikispaces.com%252Ffile%252Fview%252Ffishinnner.jpg%252F226053770%252F560x349%252Ffishinnner.jpg%3Bhttp%253A%252F%252Fmcgbiology.wikispaces.com%252FPerch%252BGreen%3B560%3B349

http://kiya-lily-biology11.blogspot.com/2011/01/perch-dissection.html

https://www.google.com/search?q=circulatory+system+perch&espv=210&es_sm=122&source=lnms&tbm=isch&sa=X&ei=XdtEU_nmM4iA2gWU7IGYCA&ved=0CAgQ_AUoAQ&biw=911&bih=400#facrc=_&imgdii=_&imgrc=nOWAe_i4cXmUXM%253A%3BY3FhRJlEcxjpaM%3Bhttp%253A%252F%252Fvisual.merriam-webster.com%252Fimages%252Fanimal-kingdom%252Ffishes%252Fbony-fish%252Fanatomy-perch.jpg%3Bhttp%253A%252F%252Fvisual.merriam-webster.com%252Fanimal-kingdom%252Ffishes%252Fbony-fish%252Fanatomy-perch.php%3B550%3B384

https://www.google.com/search?q=circulatory+system+perch&espv=210&es_sm=122&source=lnms&tbm=isch&sa=X&ei=XdtEU_nmM4iA2gWU7IGYCA&ved=0CAgQ_AUoAQ&biw=911&bih=400#facrc=_&imgdii=_&imgrc=nOWAe_i4cXmUXM%253A%3BY3FhRJlEcxjpaM%3Bhttp%253A%252F%252Fvisual.merriam-webster.com%252Fimages%252Fanimal-kingdom%252Ffishes%252Fbony-fish%252Fanatomy-perch.jpg%3Bhttp%253A%252F%252Fvisual.merriam-webster.com%252Fanimal-kingdom%252Ffishes%252Fbony-fish%252Fanatomy-perch.php%3B550%3B384