Fish.

Slides:



Advertisements
Similar presentations
10. PHYLUM CHORDATA Dorsal Notochord-long rod that supports the body-becomes the vertebrae in most. Dorsal Nerve cord-becomes the central nervous system.
Advertisements

Fishes.
Phylum Chordata. What Is A Chordate? 4 characteristics present at some stage of life 1.A dorsal, hollow nerve cord (called spinal cord in vertebrates)
Unit 11 Marine Vertebrates
Dogfish Dissection Squalus acanthias.
Fish Live in salt, brackish and freshwater Cold Blooded – body temp matches surroundings.
Section 2 Jawless and Cartilaginous Fish
Phylum Chordata Chapter The Fishes. Vertebrata– The Backboned Animals Characteristics Characteristics Most numerous & complex of Chordates Most.
Phylum Chordata, subphylum Vertebrata Share the 4 chordate characters with lancelets and sea squirts Backbone, vertebral column, spine –Series of hollow.
FISH (and chordates).
Fish.
Chordates and Vertebrates. Chordates  The notochord is an elongate, rod- like, skeletal structure dorsal to the gut tube and ventral to the nerve cord.
Marine Fishes Chapter 8. Vertebrates Share characteristics with protochordates (invert chordates) –Single, hollow nerve cord –Pharyngeal slits –Notochord.
Marine Fishes Read Chapter 9 Pages Chordates  All chordates have (at least during some period of their life) –Dorsal nerve cord –Gill slits.
FISH FACTS. PHYLUM CHORDATA Dorsal Notochord-long rod that supports the body- becomes the vertebrae in most. Dorsal Notochord-long rod that supports the.
Chapter 12 Marine Fishes.
Marine Biology Discuss: What is the Kingdom, Phylum, and Class for the following: Hagfishes: Shark: Salmon: Kingdom Animalia Phylum Chordata Class Agnatha.
Marine Fishes Phylum Chordata Subphylum Vertebrata.
VERTEBRATE ANIMALS VERTEBRATES ARE ANIMALS WITH ENDOSKELETONS VERTEBRATE ANIMALS HAVE BACKBONES MOST VERTEBRATES ARE FISH FISH CAN BE CLASSIFIED INTO 3.
Figure Characteristics of Subphylum Vertebrata A notochord that has developed into a spinal cord protected by vertebrae. Also contain a head with.
What Makes a Fish a Fish? Chapter 8: Marine Fishes.
30-2 Fishes BIO 1004 Flora. What is a Fish? Aquatic vertebrate Paired fins, scales and gills Function of parts – Gills – respiration – Scales – protection.
FISH. I. Characteristics of Fish A. Fish are over 1/2 the vertebrates on Earth.
Invertebrates Octopus Video. Phylum Chordata C. Vertebrata Share four chordate characteristics + vertebral column (spine, backbone) Spine encloses and.
Fig I. I.Fishes – Overview Oldest group of vertebrates (530 mya) 27,000+ species (15,600+ marine spp.) Four major groups Agnatha (Jawless fishes)
Marine Fishes Marine Fishes Marine Biology Unit #4.
Phylum: Chordata Super class: Pisces (Fishes)
Phylum Chordata Subphylum Vertebrata Classes of FISH.
The Chordates Phylum Chordata – The Chordates at some point in their life have a notochord, a nerve cord, and slits in their throat area.
Fishes and Amphibians.  Classified in the phylum Chordata  Subphylum vertebrata ◦ Have a back bone ◦ Bilateral symmetry ◦ Coelomate ◦ Have endoskeleton.
Please take notes!. Phylum Chordata Contains ALL fishes, amphibians, reptiles, birds, and mammals Contains ALL fishes, amphibians, reptiles, birds, and.
Fishes Ch  More than 2/3 of the Earth’s surface is water  No matter where there is water, there is some sort of fish living in the water.
6/2/15 Mr. Faia 6 th Grade Science. Before you Start… List the different types of vertebrates How long have they been on Earth? What are the advantages.
MARINE VERTEBRATES. Fish Classification Kingdom- Animalia Phylum- Chordata Sub Phylum- Vertebrata Classes- Agnatha, Chondrichthyes, Osteichthyes.
Fishes.
Phylum- Chordate (Notocord- at some point can turn into a backbone)
Marine Biology Outcome: Explain the complexities of cartilaginous fishes anatomical advancements that allow them to efficiently hunt, detect prey and avoid.
Class: Chondrichthyes - Sharks and Rays
Marine Bio Fish Unit Notes.
Chondrichthyes Cartilaginous Fish.
Fish, amphibians, reptiles, birds and mammals
Fish.
Fish.
CLASS CHONDRICHTHYES.
Phylum Chordata Vertebrates:
Marine Fish Kingdom Animalia Phylum Chordata Subphylum Vertebrata
Fish.
Fishes Phylum Chordata.
12:46 Class: Chondrichthyes
Fish.
VERTEBRATE ANIMALS VERTEBRATES ARE ANIMALS WITH ENDOSKELETONS VERTEBRATE ANIMALS HAVE BACKBONES MOST VERTEBRATES ARE FISH FISH CAN BE CLASSIFIED INTO 3.
Phylum Chordata Fish.
Chordates and Vertebrates
Animals with Backbones
Class Agnatha 80 species of hagfishes and lampreys
Fish.
Superclass Agnatha "Jawless Fish".
Section 1 Fishes: The First Vertebrates
Chordates and Vertebrates
CH 8 Marine Fishes.
General Vertebrates and Fish
Vertebrate.
Phylum Chordata A.K.A. Chordates.
Chondrichthyes.
Phylum Chordata Includes the well known vertebrates:
Class Chondrichthyes “Cartilage Fish”.
Chapter 7 Marine Fish.
Agnatha Chondrichthyes Osteichthyes
Biology.
Phylum Chordata.
Presentation transcript:

Fish

Fish Vertebrates- Have a backbone that encloses and protects a nerve cord. Estimated 22,000 species of fish Fish make up half of all vertebrate species on Earth. 58% of fishes are marine fish

Classification Phylum Chordata Subphylum Vertebrata Class Agnatha Class Chondrichthyes Class Osteichthyes

Agnatha Jawless Fish Most primitive of all living fish Skeleton made of cartilage Feed by suction; round, muscular mouth with rows of teeth Eel-like shaped body Lack paired fins and scales Examples: Hagfish and Lamprey

Hagfish About 20 species Live in tunnels dug in muddy bottoms Cold water at moderate depths Maximum length of 2.5 feet long Eat dead dying fish

Hagfish

Lamprey About 30 species Usually Freshwater Some breed in rivers and move to the ocean as adults Parasitic- Attach to other fish using sharp teeth and suck their blood

Lamprey

Chondrichthyes Cartilaginous Fish Skeleton made of cartilage, lighter and more flexible than bone Teeth, vertebrae, and jaw may become calcified, but are not true bone Mouth located on ventral side Movable jaws with well developed teeth Paired lateral fins Rough skin of scales called denticles, come from same tissue layer as teeth Examples: Sharks, skates, and rays

Denticles

Sharks About 350 species 25 species found in Gulf of Mexico Found in all depths and temperatures, but most found in tropical, coastal waters Some sharks like the bull shark can travel up rivers.

Shark structure Fins 1-2 dorsal fins on top Paired pectoral fins for lift as it swims Paired pelvic fins used to stabilize Single anal fin for extra stability Caudal fin with 2 lobes, used to propel shark Lack swim bladders; Buoyancy provided by oil filled liver (up to 25% of body wt.)

Fins

Shark structure Streamlined shape reduces drag and lowers energy output during swimming. Fusiform shape- round in middle and tapered at both ends Coloration- most use countershading Dorsal side is darker than ventral side Harder to see when looking down (dark) or when looking up toward light.

Respiration Most swim continuously to get oxygen Exception: Nurse shark “Resting” uses 9% more energy to move water over gills 5-7 gill slits, no operculum Some sharks have spiracles located behind eye, takes oxygen directly to eye and brain, or for breathing at rest

Diet Sharks known as “trash eaters” Feed on fish, crustaceans, marine mammals, mollusks, and turtles Take advantage of slow, injured, or sick prey Filter Feed, Ex: whale shark Obtain water through osmosis

Whale Shark

Senses Good vision, deeper dwellers have larger eyes for low light level Some species have nictitating membrane that protects eyes when hunting Taste buds in mouth, no tongue Smell- can detect a drop of blood 0.25 miles away Lateral Line- detect movement up to 3000 ft. away

Ampulla of Lorenzini Sense organ located in the pits of the shark’s snout Can detect electrical activity given off by muscles and nerves of other organisms Can also detect creatures buried in the sand

Reproduction Internal Fertilization Clasper- male copulatory organ Oviparous- lay eggs Viviparous- live birth Ovoviviparous- eggs hatch inside mother No parental care given

Info Most active at twilight and dark hours 32 species of shark known to attack humans Mostly Asocial (hammerheads can be found in schools) Symbiotic Relationships Pilotfish-swim w/ shark and eat food scraps Cleaner Wrasse- picks off parasites Remora fish- attach to sharks and eat parasites

Rays and Skates About 500 species Flattened bodies, hide on bottom Found in Temperate and Tropical seas Few Freshwater species in Amazon 5 pairs of gill slits located on ventral side (underneath), spiracles also Mouth on ventral side

Rays and Skates continued Pectoral fins greatly expanded; fused to head Eyes located on top of head Live birth Feed mainly at night Strong sense of smell, lateral lines detect vibrations, and electro-receptors that detect impulses of prey