Upload
madaline-berger
View
37
Download
0
Tags:
Embed Size (px)
DESCRIPTION
Fish. Classification. Kingdom- Animalia Phylum- Chordata Sub Phylum- Vertebrata Classes- Agnatha, Chondrichthyes, Osteichthyes. Agnatha. Jawless fish: Lampreys, Hagfish. Types of Agnathans. Hagfish - Ocean scavengers, not much is known about them. - PowerPoint PPT Presentation
Citation preview
Classification
•Kingdom- Animalia•Phylum- Chordata•Sub Phylum- Vertebrata•Classes- Agnatha, Chondrichthyes, Osteichthyes
Types of Agnathans•Hagfish- Ocean
scavengers, not much is known about them.
•Lamprey- fresh and salt water, they are parasitic and prey on other fish.
* Both have cartilagenous skeletons and sucker-like mouths.
Chondrichthyes• Sharks are adapted for a predatory
lifestyle.• Cartilage skeletons, stiff pectoral fins
(speed).• No operculum, must keep moving to
breathe.• Have live births.• Special scales feel like sandpaper.• Manta, and Sting Rays- live in
shallow water, have mouths located on the underside, are fairly docile, wide flat bodies and wing-like fins that are flexible.
Types of Chondrichthyes• Sharks and Rays-
have no operculum and must keep moving to breathe.
• Have different kinds of scales that feel and look more like sandpaper.
• Have skeletons made of cartilage not bones.
Types of OsteichthyesRay Finned:
– Most fish are this type– Fins are supported by bony
structures called Rays.– Teleosts are the most advanced
form of ray finned fish (symmetrical tails and mobile fins).
Lobe Finned:– Fins are long, fleshy, muscular,
supported by central core of bones.
– Thought to be ancestors of amphibians.
– Examples are: Coelacanth, Lungfish
Fish Characteristics•Gills•Backbone (vertebrae)•Paired Fins•Single Loop Circulation•Two chambered heart
Fish Respiration• Water flows over Gills as fish
opens mouth and swims.• Water flows opposite
direction of blood flow.
• O2 diffuses from the water into the blood.
• Gills are made of thousands of gill filaments.
• Gills are covered by the Operculum.
Fish Circulation• Fish heart has 2 chambers• Single loop circulation
• Blood flows into gills, picks up O2, goes to the body, returns to the heart.
Fish Reproduction• Most Fish reproduce sexually, and
fertilize their eggs externally (Sharks-internally).
• Spawning is the process of fertilizing eggs.
• Baby fish are called FRY.
Fish Adaptations• Lateral Line System- used to detect
vibrations, orient the fish in water, it is a line of cells running down the side of the fish.
• Operculum- gill cover, movement of operculum allows more water to be drawn in.
• Swim Bladder- a gas filled sac that helps the fish maintain buoyancy. Sharks don’t have a swim bladder!
• Fins- Dorsal, Caudal, Pectoral, Pelvic, Anal.