Percidae Family
Phylum: Chordates
•Most chordates have a notochord – rod of cartilage that in found inside the
body which turns into the spine
•Dorsal neural tube which creates the spinal chord
•Pharyngeal slits or the pharynx found behind the mouth with the throat
•A tail that extends from the anus
•Endostyle – a groove in the ventral wall of the pharynx
Habitat
Perch live in a wide variety
of habitats.
- Mainly found
throughout Canada
and North Eastern
United States
- Prefer fresh
waters with lots
of vegetation
- Generally live
in warm or cool
waters
- Shallow waters
 Large eyes
 Spines
 Thin, shorter disc shapes
 Striped colouration
 Light coloured bellies
 Food ingested in mouth
•most fish excrete
nitrogenous
waste such as
Digested
in stomach
ammonia
Processed
in pouches called pyloric
caecum
•Other waste diffuse
Pyloric
caecum
within
the excrete
gills ofdigestive
the fish
enzymes and absorbs nutrients
and blood waste is filtered
The liver and pancreas adds more
by the to
kidney
chemicals
the food as they move
 Broken down in esophagus




through the digestive tract
 Finally the food reaches the
intestines to finish the digestive
system
 Saltwater fish tend to
lose to the outside due
to osmosis but the
kidney returns the lost
water
 The reverse is done for
the freshwater fish
 The Brain is divided into mainly






three parts
Forebrain, Midbrain, and Hindbrain
Forebrain – controls and processes
signals that come from the nostrils
Midbrain – associated with signals
that are involved with sight
Hindbrain – largest part of the brain;
involved in balance and swimming
Chemoreceptors – create the sense
of taste and smell
They also have sensitive receptors
outside their bodies to detect
vibrations and currents to notice
other fish nearby
 Fish have a closed loop circulatory
system
 Heart pumps blood in a single
loop throughout the body
 The heart is made up of four parts
 Sinus venous, atrium, ventricle
and the bulbous arteriosus
 Sinus venous – a sac that collects
blood from the veins before
moving it to the atrium
 Atrium – muscular chamber that
sends blood to the ventricle
 Ventricle – another muscular
chamber that pumps blood to the
bulbous arteriosus and then out
of the heart
 Bulbous arteriosus – large tube
that connects to the aorta and
allows blood to flow to the gills
Respiratory System
Fertilization and Reproduction
- External sexual fertilization
- Spawn in the spring time
- Generally at night time
- Do not care for their young
-Eggs are laid in aquatic vegetation
PREPARE FOR DISSECTION