By Leighanne Masri
Vu - PAP Bio - Per.4
LAB DISSECTION PICTURES!
In this presentation you will learn:
- All about perch fish
- External and internal anatomy
- Interesting facts
- Body systems
- Key information
BACKGROUND INFORMATION/ ECOLOGY
Perca flavescens (Yellow perch)
Perca schrenkii (Balkhash perch)
Perca fluviatilis (European perch)
- Adapt to warmer/cooler water temperatures and habitats
- Survive with low dissolved oxygen levels
- Tolerate low pH ranges, used to grow properly
- Palatines (special teeth), eat other fish
- Gill rakers, filters zooplankton
Niche [Human Relations]
- Control populations of other fish through predation
- Provide business for fishermen
- Provide food for other animals and humans
BODY SYSTEM FOCUS
The perch has a closed circulatory system. The circulatory system is composed of only one circuit, with blood being pumped through the capillaries of the gills and on to the capillaries of the body tissues (single cycle circulation). The heart of a perch is a single pump (consisting of two chambers).
- Heart (4 parts): The heart pumps blood in a single loop throughout the body.
b. Atrium: A large muscular chamber that serves as a one-way antechamber and send blood to the ventricle.
c. Ventricle: A muscular chamber which pumps blood to the bulbus arterious (large tube), and then out of the heart.
d. Bulbus arteriosus: Connects to the aorta which blood flows to the gills for oxygenation.
- Yellow perch do not care for their eggs or young
- After females lay eggs in a given area, male then come fertilize them
- Yellow perch spend most of their time in shallow water during the summer
- Go to shallow water during dawn/dusk to feed
- More than 6000 species!