A few minutes earlier someone had spotted the first North Atlantic right whales of the day. But now they were down below and out of sight in 80 feet of murky seawater.
Free Essays Must Be Free! Waste no more time! Introduction Whale is a large Baleen whales essay that lives its entire life in water. Like other mammals, whales have a large highly developed brain and nurse their young with milk.
Whales resemble fish in many ways, but they are not. Fishes are cold blooded and breathe underwater using gills. Whale maintains a warm, constant body temperature of about 37 degrees Celsius about 99 degrees Fahrenheit and breathes underwater using lungs. Unlike fish, whales move their tails up and down when they swim instead of moving side to side done by the fish.
Whales can be found in all oceans and seas in parts of the world, rivers and lakes in Southeast Asia, South American tropics, Northern America and various other parts of the world.
Whales are enormous in size compared to other mammals but at the same time, it is also one of the biggest animals living today.
There are over seventy- five different species of whales and each species has its own unique characteristics.
Now today, I would like to start the presentation off by talking about the different groups of whales and the different species within the groups.
Since there are so many different types of whales, I would like to talk about the whales that I believed to be very important. Whales are divided into two groups ;toothed whales and baleen whales.
The toothed whales have jaws lined with simple pointed teeth. These whales actively hunt fish and squid. Toothed whales vary in size from one s that are six feet long to the great sperm whales that average fifty-five feet in length and can weigh nearly fifty metric tons. Among the more unusual toothed species are the narwhal and the beluga, which both inhabit the Arctic waters.
|Are dolphins considered whales? - ask Dr. Galapagos||Etymology[ edit ] The genus name Aetiocetus comes from Ancient Greek aetio "cause" and cetus "whale", translating to "causal whale".|
|Diagnostic information:||Referrer URL if available: A Court in Germany ordered that access to certain items in the Project Gutenberg collection are blocked from Germany.|
|Acculturation and Assimilation||Whale reproduction Breeding behavior is complex and often involves three or more animals. Both male and female whales reach puberty at approximately eight years of age.|
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|Free Study Guide for 20, Leagues Under the Sea||Blue whales Essay - Paper Example Blue whales Essay Abstract The Blue whale is the largest creature of the sea, in fact, it is the largest creature known to man - Blue whales Essay introduction.|
From the toothed whales, I will be talking about the beluga whale. The second group known as baleen whales, instead of having teeth, they have mouths lined with giant flexible combs of a material called baleen, or whalebone which is used to filter small fish from the water.
There are three types of baleen whales: From this group I would like to talk about the southern right whale, northern right whale, bowhead whale, gray whale, blue whale and humpback whale. The reason why I chose these whales is because they are listed either as an endangered or vulnerable species.Baleen whales split from toothed whales (Odontoceti) around 34 million years ago.
Baleen whales range in size from the 20 ft (6 m) and 6, lb (3, kg) pygmy right whale to the ft (34 m) and t ( short tons) blue whale the largest known animal to have ever existed. They are sexually dimorphic.
The baleen whales, also called whalebone whales or great whales, form the Mysticeti, one of two suborders of the Cetacea (whales, dolphins, and porpoises).
Baleen whales are characterized by having baleen plates for filtering food from water, rather than having teeth. Some of the most renowned evidence for evolution are the various nonfunctional or rudimentary vestigial characters, both anatomical and molecular, that are found throughout biology.
A vestige is defined, independently of evolutionary theory, as a reduced and rudimentary structure compared to the same complex structure in other organisms.
The other Cetacean suborder, Mysticeti (baleen whales), comprises filter feeders that eat small organisms caught by straining seawater through a comblike structure found in the mouth called baleen. This suborder includes the blue whale, the humpback whale, the bowhead whale and the minke whale.
The whales remained deep down, scooping up patches of zooplankton and straining out the seawater through the long strips of baleen in their mouths. Scooping and straining, scooping and straining. A change in the location of their preferred food is the most likely explanation for the whales’ wandering itinerary, Mayo said.
20, Leagues Under the Sea Summary. Complete study guide for 20, Leagues Under the Sea. Chapter Summaries, Analysis, Themes, Characters & More.