PPT-Bioelectric Sensing in Sharks and Rays

ENGNBIOL 267 Behavior and Electrosensory Capability httpwwwyoutubecomwatchvBPDu0TvUtAU httpdscdiscoverycomvideosperfectpredatorsshortswhitetipblindkillerhtml httpwwwyoutubecomwatchv5JWvTFZZsAc. Marcelo Carvalho Here we have our dogfish laid on its back Male dogfishes just like all sharks and rays have one clasper associated with each pelvic fin The clasper is the male intromittent organ organ of insertion The pleuroperitoneal cavity is no Marine Fishes. Section 12.1. . Protochordates. and. Jawless Fishes. Objectives. List. the distinguishing features of the . protochordates. . and the jawless fishes. Explain. the importance of studying . . By. : . Wajeha. . khan. Table of contents . Chapter 1 :Environment , Chapter 2 :Survival , Chapter 3 : Characteristics , Chapter 4 : Development , Chapter 5 : Breeds , Chapter 6 : Fun Fact. . Kingdom: . Animalia. . Phylum: . Chordata. . Subphylum: . Craniata. . . Infraphylum. : . Vertebrata. Classification. Largest and most successful group of chordates. Notochord: replaced by bony or cartilaginous vertebrae (the backbone). white . sharks?. Dr Alison Kock. Photo: Jean Tresfon. Populations of large predatory sharks are in decline. Shark populations. Slow growth, late maturity and low reproductive output = vulnerable to human threats . Genevieve Rogan, Austin Marrs, Janet Kim, Joe Liverman. What’s a . shark. ?. There are many different types of sharks, however experts agree that all sharks share a few common characteristics:. -They are all predators. Phylum . Chordata. Class . Chondrichthyes. Subclass . Elasmobranchii. Superorder. . Selachimorpha. Known as “sea dogs” until the 16. th. century. Name “shark” may have come from the . Yucatec. The Amazing History Of The Frilled Shark. Scientist believe that frilled sharks have been around just as long or even longer than the dinosaurs!. Even longer than jellyfish! . That is millions of years and that is a very long time .. By Sharon . Guynup. Summary. The article presents facts about the importance of sharks to the environment, their size, the threat they pose to people, the way they hunt and eat, their physiology, and their relationship to other aquatic creatures.. FeatureIncreasingly, the message of conservation societies that sharks are more threatened by humans than Image problem: Ever since the release of Steven Spielberg’s summer blockbuster 39 years . khan. Table of contents . Chapter 1 :Environment , Chapter 2 :Survival , Chapter 3 : Characteristics , Chapter 4 : Development , Chapter 5 : Breeds , Chapter 6 : Fun Fact. . Presented By. Dr. . Banashree. . Saikia. Assistant Professor. Department of Geography. JN . College, . Boko. Electro Magnetic Radiation . is one of the important component Remote Sensing . Technique.. A shark is a fish – what is a fish?. Three types of ‘fin’ fish or ‘true fish’:. Jawless fish. : ~ 100 species. Primitive. Lack a jaw, cylindrical and elongated bodies, no scales or paired fins. Few commercial uses. e.g. Eels or snakes. CITES Secretariat. Geneva. CITES Appendices and . Sharks. CITES Appendices. Species* regulated under CITES are divided amongst 3 Appendices. I. II. III. * ". Species" means any species, subspecies, or geographically separate population .