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 . PROTOCOLS AND TECHNIQUES FOR RESPONDING TO STRANDINGS January 2007 I. Background 1. This document was produced in response to recommendation III, Article IV, of the III Meeting of the Scientific and Know the defining characteristics of mammals.. Classify different types of marine mammals. Relate physiological adaptation of marine mammals to their environment. Marine Mammals. vocabulary. Mammary glands. What is a Mammal?. Mammals have a 4 chambered heart.. Mammals are warm-blooded.. They have hair/fur.. Have mammary glands.. Give birth to live young.. Pinnepeds. Pinnepeds are. . marine mammals that have flippers and blubber, that need to breed on land. . 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. . Chapter 4, Module 3. 1. Marine Mammal Protection Act of 1972. Learning Objective: The student will become familiar with marine mammals, USFWS and NOAA jurisdiction and compliance options for the Marine Mammal Protection Act.. The CaseAgainstMarine Mammals in Captivity What does good note taking and rewriting look like?. Dugongs,. or sea cows as they are sometimes called, are marine mammals. . They can grow to about three metres in length and weigh as much as 400 kilograms. They are the only marine mammals in Australia that live mainly on plants. The name sea cow refers to the fact that they graze on the seagrasses, which form meadows in sheltered coastal waters.. Marine Vertebrates:. Mammals. Marine Mammals. Carnivora. Sea otters, polar bears. Pinnipeds. Seals, sea lions, walruses. Sirenians. Manatees, . dugongs (sea cows). Cetaceans. Porpoises, dolphins, whales. Integument & Derivatives. Skin is thicker than other vertebrates. Epidermis – thinner, protected by hair. Dermis – thicker. Glands. Sweat Glands. Eccrine glands. Secrete a watery fluid, draws heat away when evaporated . 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.. 2IntroductionOur World is facing the strongest environmental crisis ever and its e31ects are causing the sixth major extinction of the planet Earth More than 7700000000 human beings are exhausting the Gregg Thomas. Indiana University. SMBE 2014. Convergent evolution is observed at the phenotypic level. Porcupine. (. Rodentia. ). Echidna. (. Monotremata. ). Hedgehog. (. Erinaceomorpha. ). 2. Predictable Evolution. Vertebrates. Warm blooded. Breath through lungs. Live birth. Mammary glands. Intelligent (Large brains). Hair & Different shapes and sizes of teeth. Marine mammals.  are aquatic mammals that rely on the ocean and other marine ecosystems for their existence. They include animals such as .