AIM: What are the main characteristics of fishes and how do jawless fishes,cartilaginous fishes and bony fishes differ ? OBJ: Given notes and activity.
Post on 13-Jan-2016
220 Views
Preview:
Transcript
AIM: What are the main characteristics of fishes and how do jawless fishes,cartilaginous fishes and bony fishes differ ?
OBJ: Given notes and activity sheet SWBAT describe the main characteristics of fishes and how jawless fishes, cartilaginous fishes and bony fishes differ with 70% accuracy.
DN: Introduction to Fish (notes)
ACT: Text, read p. 86 – 92, Work on Fishes Act. Sheetipad – eSpark Assignment
HW: Complete Fishes Act. Sheet; Work on Vertebrate Review Sheets and Animal Activity Sheet. Vertebrate Exam, Dec. 3
Fish Characteristicsectotherms (cold-blooded)
fins (movement)
scales
gills (respiration)
water lifestyle
mostly external fertilization
closed circulatory system
2-chamber heart
oldest & largest vertebrate group
Jawless Fish CharacteristicsNo jaws
No scales
cartilage skeleton
Example: hagfish, lampreys
A Face Only A Mother Could Love
FossilRecord
Cartilaginous Fish Characteristics
jaws
scales
cartilage skeleton
carnivores
Example: sharks, rays, skates
Sharks, Skates, Rays
Bony Fish Characteristicsjaws
scales
bone skeleton
gill pocket with flap
swim bladder (internal gas-filled sac)
most fish (95%) are bony fish.
Example: trout, tuna, goldfish
Deep Marine Anglerfish
More Deep Ocean Anglerfish
Coelacanths are one of the most primitive types of bony fish. Their fossils range from 400 to 60 million years ago.
top related