Lake Us Swim
By: Susan Yu Mitcham-PAP Bio-6
Objectives - Perch Dissection
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
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
Functions of the Organs
muscular organ helping blood to circulate
upper chambers of the heart that receives blood and turns it into the ventricles
circulates the blood from the heart to the gills then on through the head + body
organ that extracts oxygen from the water
carries blood from the heart to the organs
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
Cladogram of Perch History
Taxonomy of the Perch
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: http://severnriverkeeper.org/yellow-perch/
The BIG Perch Story
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
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