percidae family
DESCRIPTION
Percidae Family. Phylum: Chordates. Unique, Shared Characteristics of the 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 - PowerPoint PPT PresentationTRANSCRIPT
Percidae Family
Phylum: Chordates
Unique, Shared Characteristics of the 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
Adaptations of the PerchLarge eyesSpines Thin, shorter disc shapesStriped colourationLight coloured bellies
Food Processing and Excretion Food ingested in mouth Broken down in esophagus Digested in stomach Processed in pouches called
pyloric caecum Pyloric caecum excrete
digestive enzymes and absorbs nutrients
The liver and pancreas adds more chemicals to the food as they move through the digestive tract
Finally the food reaches the intestines to finish the digestive system
•most fish excrete nitrogenous waste such as ammonia•Other waste diffuse within the gills of the fish and blood waste is filtered by the kidney
OsmoregulationSaltwater 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
Sensory systemThe Brain is divided into mainly
three partsForebrain, Midbrain, and HindbrainForebrain – controls and processes
signals that come from the nostrilsMidbrain – associated with signals
that are involved with sightHindbrain – largest part of the brain;
involved in balance and swimmingChemoreceptors – create the sense
of taste and smellThey also have sensitive receptors
outside their bodies to detect vibrations and currents to notice other fish nearby
Circulatory System 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
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