PPT-  Marine mammals Introduction

One type of animal that made a successful and complete transition from land to water in the course of its evolution is the whale The According to the fossil record about 50 million years ago some terrestrial mammals began to make the transition from a life on land to a life in the sea . Monotremes. Luo. et al. (2002).. Node labeled 1 indicates our (stable) . clade. -based definition of . Mammalia. .. This is the commonly used crown-. clade. definition.. Luo. et al. (2002).. We’ll look first at the . Vertebrates. 350 m.y.a. vertebrates invaded land. Decendents of bony fish . Land vertebrates had to adapt to harsher conditions on shore. Tetrapods had to develop lungs that allowed for absorption of oxygen directly from air. . The CaseAgainstMarine Mammals in Captivity Class Mammalia . Phylum . Chordata. . 1. . Hair or fur. :. a. keratinized derivative of the skin. b. uniquely mammalian. c. hair coat also called a . pelage.. kinds . of hair: . guard hairs. . ,function. Unit 3. Mammal classification. Mammals are one of the classes of vertebrates. All mammals share a series of common characteristics. Internal body temperature control. Mammary glands. Live birth (few exceptions). Kingdom. Animalia. Phylum. Chordata. Class. Mammalia. Order. Characteristics of ALL mammals:. Hair. Young develop in uterus (except . . monotremes. )viviparous. 3. Young . nourished by milk . from. . Chapter 16. Birds. Birds belong to the class Aves.. Aves comes from the Latin word for bird. .. First appeared on Earth 150 million years . ago. Section 1. Bird Characteristics. S. hare some characteristics with reptiles. Marine Vertebrates:. Mammals. Marine Mammals. Carnivora. Sea otters, polar bears. Pinnipeds. Seals, sea lions, walruses. Sirenians. Manatees, . dugongs (sea cows). Cetaceans. Porpoises, dolphins, whales. Introduction. I´m. . going. . to. . talk. . about. :. Mammals. .. What. . they. . eat. .. Their. . body. . covering. .. What. are . they. .. How. . they. reproduce. . AND. HUMAN BEINGS. Birds. Birds belong to the class Aves.. Aves comes from the Latin word for bird. .. First appeared on Earth 150 million years . ago. Section 1. Bird Characteristics. S. hare some characteristics with reptiles. Jackie Rainer. The Issue. SONAR is dangerous to the health and well-being of marine mammals. The Navy should refrain from using it where mammals are known to congregate.. Marine Mammals. 128 species. Eduardo Infante, AOBAC, Chile. History of the Fishery. The Chilean toothfish fishery goes back to the late 80´s, but it was on the 90´s that a commercial fishery was developed. . The decrease on the quotas of Austral Hake make the longliner fleet to look for alternative species.. After you begin your search for Marine safety equipment supplier you need to be able to recognize the type of equipment you will need to buy. This can be very simple once you have become acquaint with your states rules and system and have also determined. Ancestors that dominated the Permian And Early Triassic. “Triassic Takeover”. . - Dominance of dinosaurs may have driven some . therapsids. to a nocturnal, insectivorous lifestyle.. . - this may have selected for hair and .