'Paired fins' diaporamas de présentation

Week Two

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Chapter 8

Chapter 8. Marine Fishes. Phylum Chordata. Subphylum Vertebrata. Classification of Fishes. Marine Fish. First vertebrates - 500 million years ago Oldest and largest group of vertebrates 24,000 known species of fish, 15,000 marine Bilateral symmetry Endoskeleton.

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How to Use This Presentation

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Osteichthyes

Osteichthyes. Osteichthyes. Means fish with bony skeletons There are over 20,000 species of bony fish. Where Do Most Fish Live?. Most fish live in the epipelagic zone. Types of Fins. Tail Fin (CAUDAL FIN) Paired Fins (PECTORAL and PELVIC FINS) Medial Fins (DORSAL and ANAL FINS).

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Nonvertebrate Chordates, Fishes, and Amphibians

Biology I: Chapter 30. Nonvertebrate Chordates, Fishes, and Amphibians. CHORDATES. Chordates. Phylum Chordata Fishes, amphibians, reptiles, birds and mammals Four key characteristics: 1. Dorsal, hollow nerve cord 2. A notochord 3. Pharyngeal pouches

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Lecture #2 - August 27, 2008 Reading for Today: pgs. 10-14, 151-157,197-204

Lecture #2 - August 27, 2008 Reading for Today: pgs. 10-14, 151-157,197-204 1. A few more phylogenetic terms. 2. Building a tree a. synapomorphies & homologies b. swapping branches 3. Defining Characters of Cepahlochordates, Myxiniformes, Petromyzontiformes, & Gnathostomata

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Directional Terms You Must Know

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Compare and Contrast Why did scientist classify Pikaia as a chordate instead of as a worm

Compare and Contrast Why did scientist classify Pikaia as a chordate instead of as a worm Review What two aspects of evolutionary history does the cladogram of chordates show

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FISHES

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2.3.1 Taxonomy and Classification

2.3.1 Taxonomy and Classification. Classification. The science of grouping organisms based on their similarities. Why we classify?. To help identify organisms To draw parallels and distinctions between organisms To identify relationships between organisms

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Evolution and Classification of Fishes

Evolution and Classification of Fishes. Morphology of the Bony Fish. Classification. Subphylum: Vertebrata (45,000 species) -Class: Agnatha~jawless fishes (hagfish, lampreys) *May also be divided into: -- Class: Myxini (hagfish)

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Lesson Overview

Lesson Overview. 26.2 Chordate Evolution and Diversity. The Earliest Chordates. The Cambrian fossil deposits include some early chordate fossils, such as Pikaia, which is shown in the figure.

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Evolution and Classification of Fishes

Evolution and Classification of Fishes. Morphology of the Bony Fish. Classification. Subphylum: Vertebrata (45,000 species) -Class: Agnatha~jawless fishes (hagfish, lampreys) *May also be divided into: -- Class: Myxini (hagfish)

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Scientific classification Kingdom: Animalia Phylum: Chordata Subphylum: Vertebrata Class:Agnatha

Scientific classification Kingdom: Animalia Phylum: Chordata Subphylum: Vertebrata Class:Agnatha. INTRODUCTION. Agnatha - ( Greek , "no jaws")

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Ichthyes: The Fish

Ichthyes: The Fish. What is a Fish? Aquatic vertebrate, usually with paired fins, scales and gills. -fins for movement -scales for protection -gills for respiration -Very diverse group composed of many classes of fish. -. Evolution of Fish -Fish were the first vertebrates

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Jawless and Cartilaginous Fishes

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Fish Biology

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Vertebrate that lives in water Most have swim bladder to adjust the buoyancy

Characteristics of Fish. Vertebrate that lives in water Most have swim bladder to adjust the buoyancy Paired fins for movement Sc ales for a protective body covering (except the catfish does not have scales). Respiratory System Gills to filter oxygen from the water

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OSTEICHTHYES BONY FISH

OSTEICHTHYES BONY FISH. FINS. CAUDAL ? FORWARD MOVEMENT. PAIRED FINS. PECTORAL ? TURNING AND STOPPING PELVIC ? TURNING AND STOPPING. MEDIAL FINS. DORSAL ? BALANCE ANAL ? BALANCE. CAUDAL. HOMOCERCAL SAME / SYMMETRICAL HETEROCERCAL NOT SAME / ASYMMETRICAL. ASPECT RATIO.

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