killer whales essay


Whales will be giant animals that live inside the sea. They look like fish, but are

not. Whales belong to the group of animals referred to as mammals. Whales belong to the

group of mammals called cetaceans, which originates from a Latin word meaning large

marine animal. There are two significant groups of whales. The first group can be mysticeti

(baleen whales), as well as the other isodontoceti (toothed whales). In the group

odontoceti, there exists a family of whales called delphinidae (dolphins and small

toothed whales). From this report, I will focus on a species of whale that comes

from this family members, and that kinds is the great whale, or perhaps also known as orcinus

orca, or maybe orca. The greatest and most stunning of the dolphin family, the

killer whale is one of the the majority of fearsome predators of the deep. Killer whales

are basically the same form as seafood, but they change in many ways. One of many

most obvious distinctions is the end fin. Seafood have vertical tail bout, while

whales have horizontal tail fins. One of the most unique features of orcas

is the extra tall, wide dorsal fin found on its again. In females, the dorsal fin can

grow to about 2 feet high. It is falcate (hooked or perhaps curved). In males, the

dorsal fin is pie and can develop up to regarding 6 foot high. One more

distinctive feature of killer whales is that they include a sleek, grayscale

white skin tones pattern. A white patch is located previously mentioned and lurking behind the eye.

A substantial white ventral patch runs onto the flanks (sides). There is a

grey saddle at the rear of the dorsal fin, which can be black when they are born. (Hoyt, Pg. 32) At

birth, orcas are about 2 . one to two. 4 metres long and weigh regarding 180 kilos.

When they are adults, males grow to about 9. five meters extended weighing almost 8 tons or

more. Females grow to eight. 2 yards long and weigh 4-6 tons. Orcas have solid

and stylish bodies with a conical or perhaps rounded mind. (Hoyt, Pg. 97) It includes no

distinct beak. They have straight mouthlines. Another physical attribute of

killer whales, besides having a tall hinten fin, is the fact killer whales have

large, paddle-shaped flippers. These flippers are two to three times bigger in guys than

they may be in females. Killer whales are very huge physical specimens. Being

termed as a fearsome seeker with killer instinct, it would be interesting to know

what a monster whales diet consists of. The orca resembles the great light

shark in its predatory skill and range of food. They will eat seabirds, turtles

fish, including sharks, whales, dolphins, porpoises, seals, and marine lions.

These types of hunters supply in categories of two to twenty pets or animals. They can actually kill baleen

whales bigger then themselves. They have 15 to 13 teeth to each side of

each jaw, which assists with their feeding. Though great whales at times attack

dolphins, seals, and also other whales larger than themselves, nevertheless they have not been

known to assault people, although there have been recorded cases of killer

whale attacks. Through the ages, whales have lost a few of the characteristics

of mammals. Mammals have locks covering their particular bodies. Whales have only a few

stiff hairs on their mind. Mammals include four thighs. A whale has no hind legs.

The only traces that they remain are two tiny hipbones. The front lower limbs have

developed into flippers, that are used for guiding or keeping its balance.

Although great whales discuss the same qualities as mammals, they also have

special features that allow them to reside in the water. Whales have many unique

characteristics suited to living in the. Living in drinking water enables them to

reach enormous sizes. The buoyancy (lift) of water helps support a whales

body, making it possible for those to grow larger. (Ellis & Knoph

Pg. 18) Orcas have a very streamlined form. This enables those to swim with a

minimum of resistance. The powerful tail fins called flukes are horizontal.

Whales swimming by shifting the flukes up and down. Another characteristic that may be

helpful to great whales, or any type of type of whale, is that a whales anchor

ribcage, and shoulder blades resemble those of different mammals. Nearly all mammals

have seven throat vertebrae. In killer whales, these backbone are compressed into

a quick length or perhaps joined with each other into one bone fragments. This retains the head from moving

about. It also joins your head directly to your body. Orcas possess smooth, rubbery

skin that easily slipping through the drinking water. Mammals have hair to hold them nice.

Whales have got only a few hair on the brain. To keep nice, they have a layer of excess fat

called blubber. The blubber grows to about 6th inches thicker never growing more. In the event

there is no food around or perhaps there is small food, fantastic whales may live off

all their blubber for some time. Since blubber is less heavy than normal water, this

boosts the buoyancy of whales. Much like their mammal brethren, whales possess

lungs and must come to the surface to breathe. They can maintain their breath of air for

long periods of time. Their muscle tissues store even more oxygen than the muscles of other

mammals. Orcas retail outlet 41 percent of their air supply in the muscles. When ever

diving, the body reduces blood flow for the muscles, nonetheless keeping an ordinary

flow to the heart and brain. The heartbeat slows down helping to save oxygen. After a

dive, a killer whale must consider several breaths to recharge its tissues with

oxygen before snorkeling again. For the orca arises to inhale, it comes forward

since it breaks the. This activity gives it no more than two mere seconds to blow

out and breathe in about 2, 100 quarts of air. They breathe through nostrils

referred to as blowholes. These are generally located at the top of the head. Orcas have one

blowhole. Powerful muscle tissues and valves open the blowhole wide so the whales can

breathe. Then they click tightly shut. A cloud called a whack or spout is made

when a whale exhales. That consists of water vapor. The idea may include mucus

and essential oil droplets. A fascinating aspect of whales is that they utilize most of

the five detects that human beings use. The five detects are ability to hear, seeing, smelling

touching, and talking. Monster whales have no sense of smell and have poor

visual acuity. They have well-developed senses of touch and hearing. Their very own keen

experiencing provides them with information about their surroundings.

(International Experts, Encyclopedia survey, 1988) They can notice a wide range of

appears, including low-and high-pitched music that is beyond the range of man

hearing. They will also notify from what direction a sound is coming from. Great

whales generate sounds in the nasal longchamp system, several air-filled

pouches around the blowhole. They identify underwater items by hearing for

echoes produced if the objects indicate the appears. They decide the distance

plus the direction of an object through the echoes. This really is called echolocation.

When researching almost any animal, it is additionally worth knowing living of

the dog being investigated. Knowing the life span of monster whales is advantageous

information a researcher can easily later use. The actual life span in the killer

whale helps the researcher appreciate how the killer whale lives and how lengthy it

lives. The life span of killer whales is 50+ years intended for the men and 80+ years

intended for the females. Human sportsman account for lots of the deaths. Apart from

people, whales have no organic enemies. Almost all of the whales that escape the

hunters harpoon live to old age and die of natural triggers. Some orcas die following

stranding themselves on a beach front. In some cases, a whale swims in a lake ashore alone. In

other cases, a complete pod of whales becomes stranded. Persons often come back

beached whales to the sea, but many swim back onto the beach. They cannot live

long out of the water. They could overheat, turn into crushed by way of a own pounds, or

drown when the tide covers their very own blowholes. Another aspect well worth

noting is definitely how monster whales duplicate. The way that killer whales reproduce is usually

very unconventional as compared to additional mammals or perhaps other whales. Killer whales

mate within a specific time. The male, called a bull, plus the female, called a

cow, take part in playful dating as part of the mating process. The whales stroke

each other with the flippers during courting. Females breed by 9 to 10 years

while males particular breed of dog at of sixteen to 18 years. The gestation period or pregnant state period

endures 13 to 17 weeks. A female can give birth every single 10 years, at times every

3 years. A whale has merely one baby at the same time. A baby whale is called a calf.

Twin babies rarely take place. During beginning one or more females may help the mother. Whales

are already large animals when they are born. Calves will be born in fall and winter. They are

8 foot long and grow 5 inches every month. As soon as the baby is born, the

mother nudges it towards the surface to take its 1st breath. The girl stays near to it

no less than a year. Throughout this year, the feminine will doctor her leg. She has

exceptional breast muscle groups that pump milk in the babys mouth area. Whale dairy is

remarkably concentrated and rich in body fat, protein, and minerals. (Leatherwood

, Reeves, Pg. 134) This helps the lower legs grow extremely fast. General, there

are a plethora of characteristics and attributes which will make killer whales unique.

Unique the fantastic instinct, life time, or approach to reproduction, it truly is

easy to see that killer whales are very particular creatures. Nevertheless there are many

different varieties of whales, I chose to write about one particular species of whale:

the great whale or perhaps orcinus orca. Whales are thought to be along the lines of

mild of nonviolent. Killer whales, however , are neither. It is these

characteristics of the fantastic whale that many people get intriguing. Whales, in

standard, are very one of a kind creatures. The killer whale is unique in its own method

and possesses particular characteristics that most whales will not. It is the great

instinct present in killer whales that makes these people intriguing and distinguishes

these people from other types of whale.

Zoology and Family pets

  • Category: works
  • Words: 2030
  • Pages: 7
  • Project Type: Essay

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