Free Marine mammal Essays and Papers

are mammals like monkeys living on land and whales living in sea. Whales are not the only mammals living in the sea, there are dolphins, walruses, seals etc. Though above mentioned beings don’t fall under a single biological group, they are categorized as marine mammals due to their dependence on the sea for existence. Whales and dolphins completely depend on the sea for feeding and breeding whereas seals and walruses feed in the sea and breed on the land. The distribution of the marine mammal species

Animal Rights for Marine Mammals Written By: Bottlenose dolphins became part of a United States Navy program in 1959 for the purpose of conducting scientific research into their sonar and hydrodynamics in hopes of getting design ideas for submarines, ship hulls and weapons. It was discovered dolphins hear and navigate in the water by using their natural sonar, which happened to be more precise than most fabricated sonar systems. In the mid-sixties, Navy dolphins were used as mail carriers to underwater

Injuries to acoustic organs in several species of whale results in their death (Wright et al, 2007) Acoustically-induced stranding may also be observed in other cetacean species and the probability that noise can result in strandings and/or death in marine mammals occurs beyond naval sonar. For instance, seismic noise has been implicated in a stranding of beaked whales (Hildebrand, 2005) Hearing Damage Temporary hearing loss is induced by the exposure to anthropogenic noise. This is referred to as temporary

Beginning from the 17th century until the early 20th century, humpback whales were commercially hunted for meat, oil, and clothing decreasing their population substantially to the point of near extinction. These mammals were exploited greatly in the North Pacific region but have shown a substantial increase in population size. This increase in population size is a direct result from The International Whaling Commission banning commercial hunting of humpback whales in the North Pacific starting in

Marine Mammals 1. Introduction Humpback whales (Megaptera novaeangliae) annually migrate from their summer feeding grounds off southeast Alaska to winter in waters off the Hawaiian Islands, Baja California Sur, Mexico and northern Japan (Baker and Darling). The number of humpback whales in the Hawaiian waters generally peaks from mid-February through mid-March ( Baker & Herman, 1984). Calving and breeding is an important function of humpback whales while wintering at lower latitudes

millions of people across the world travel to marine parks, for the chance to see one of the most intelligent, fascinating beings of this Earth, the marine mammal. However, this aquarium is actually a torturous jail cell for the marine mammals that inhabit it. Research has shown that these animals were never fit for captivity. In fact, according to the popular documentary “Blackfish”, more than seventy trainers have been injured by the captive marine mammal, though not a single aggressive tendency toward

Imagine a warm day in February, a day that you have been waiting for forever, to see a majestic sea mammal, an orca (commonly known as a killer whale). The show was called “Dine with Shamu”, the orcas were doing amazing tricks and splashing the kids in the front row. After the show was finished, you make your way under the stadium to get a picture with the star of the show, Tilikum. As you wait for him to show himself, a siren goes off and sends everyone into a panic. You look at the crystal clear

The fossil record demonstrates that mammals re-entered the marine realm on at least seven separate occasions. Five of these clades are still extant, whereas two are extinct. the degree to which each of these clades has adopted an aquatic lifestyle. Both Cetacea and Sirenia originated at about the same time and were fully aquatic by the end of the Eocene epoch. Each of these evolutionary histories is different from the others based on which changes in each anatomical system occurred. Despite this

The Narwhal, Monodon monoceros, is a social, specialized deep-water marine mammal characterized by a unique tooth growth protruding from the upper jaw. Narwhals lives along the coasts and rivers throughout the Arctic,characterized by icy ocean temperatures. Narwhals are usually found in groups of 15 to 20, but herds of several thousand have been seen in the Arctic waters since 1871. Regularly found eastwards from the Canadian Arctic to central Russia they have also been distributed throughout the

example of repeated transient can be something as simple as pile driving or seismic air guns. Anthropogenic sound sources surviving for longer durations at lower magnitude, such as shipping noise, are grouped under continuous (Kopar and Plon, 2012) Marine mammals demonstrate diverse reactions to the specific noise exposure. These responses ranging from “changes in their vocalisations (shifts in frequency, becoming silent, etc.) to displacement or avoidance (including shifting their migration paths). Changes

Chemical Pollutants vs. Marine Mammals One of the primary ways through which humans have caused significant modifications to the wildlife and their habitat is pollution. Pollution results from changes occurring to the physical and chemical characteristics of the environment leading to a harmful influence on wildlife and can cause deaths or an impairment to their health. Marine ecosystems are subject to chemical pollution from sources such as run-off, sewage, radioactive waste, oil drilling, and

Protecting the Dugong The dugong (Dugong dugon) is the only herbivorous mammal that is strictly marine and is the only extant species in Family Dugongidae. A characteristic dugong weighs about 400 kilograms and can grow up to three meters long (Stonehouse, 1992). It is easily distinguished from others in order Sirenia by its triangular whale-like tail. The manatee, the other member of order Sirenia, has a distinct paddle-shaped tail and spends its life in rivers and estuaries. Like the manatee

The West Indian Manatee (Trichechus manatus) is a marine mammal that lives in the coastal waters and around the offshore reefs of Belize. Manatees have large gray bodies covered with algae or barnacles. They are herbivores that consume marine vegetation such as sea grass and surface regularly to breathe. They reside in sea grass beds and in mangroves that provide them with shelter. The West Indian Manatee is listed as vulnerable under the IUCN Red List of Threatened Species, and may eventually be

Dugon) is a large marine mammal and is the only member of the family Duongidae. It is one of four living species of the order Sirenia. First classified as Trichechus dugon by German zoologist, Philipp Muller in 1776 these beautiful m... ... middle of paper ... ...arine Park. Dr. Marsh has contributed widely to interdisciplinary solutions to conservation problems of the dugong. Web: http://www.helenemarsh.com/ -Further reading: -De-colonising Conservation? Traditional use of marine resources, agreements

such as pollution, over hunting, and habitat loss and climate change, There are still many government agencies and private organizations that are working to save the beluga whale population. These governmental organizations and acts include the Marine Mammal Protection Act and the International Whaling Commission. Private Organizations include the Defenders of Wildlife and the Save the Whale organization and so much more. These organizations are very effective because they help save the Beluga Whale

entertained by the sea mammals in the tanks, jumping in the air on command by whistle. These tricks draw guests into the park. What may seem to be fun for the viewer, is torture for the mammals. There is a deadly truth behind all sea mammals in captivity: they don’t survive well there. Though sea mammals provide entertainment, they do not belong in captivity. Imagine being at home and then somebody broke in and you were forced, without any choice, to join the circus. This is what the mammals have to go through

Orcas, often known as killer whales, are magnificent aquatic marine mammals. Orcas do not belong in captivity; they are used for unethical reasons such as human entertainment and to make money. Although killer whales have “whale” in their names, they actually are the largest breed of dolphin. Orcas are known as killer whales not because of any danger to humans, but because they feed on other big mammals (Bio expedition.) As Ethan Morris posted in his article, killer whales had never been a threat

to the marine researchers and scientists that it is very harmful idea for the orcas as well as humans to keep them held. After coming across informative articles and evidence, I saw the torture that these poor animal... ... middle of paper ... ...mall as one ten thousandth percent (0.0001%) of their normal habitat size (Rose). Whales and dolphins are intelligent but in captivity they live impoverished lives doing the same tricks day after day. However good the facilities at the marine parks are

world’s most productive. The chief direct consumer of this immense planktonic production is the Peruvian anchoveta, Engraulis ringens Jenyns, and it in turn is the chief forage item of the region’s higher level consumers, including fish, birds, and marine mammals. In some years the normal processes of production and consumption are interrupted when upwelling ceases and warm surfac...

Can Marine Mammals Suffer From Decompression Sickness? Marine mammals are able to suffer from decompression sickness, which is a condition that occurs when sudden decompression causes nitrogen bubbles to form in the blood and tissues of the body. The lifestyles of marine mammals makes them susceptible to this condition, however, they have adapted to overcome this obstacle. Many marine mammals are capable of storing gas in their trachea during dives. The trachea is reinforced by cartilage, which