What is a blue whale
Blue whale :
The blue whale is classified as a
mammal, contrary to what some believe to be fish, and it is the largest animal
on the planet ever.Its weight reaches 173 tons، This number exceeds the size of all land
and marine animals, followed by the elephant.
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| What is a blue whale |
Characteristics of the tiger animal
what is a blue whale
Its
length is 30 metres.
Her tongue may only weigh
approximately the weight of an elephant, and her heart may weigh as much as a
car.
Whales range in age from 30 to 80
years, and the female is larger than the male.
The whale travels long distances of
up to thousands of kilometers across the oceans in search of food and warmth
for a period of up to 4 months.
What is a blue whale classified as?
Species and their spread:
There are three main species of blue whales spread in the world's oceans,
Which is:
Musculus whales:
It lives north of the equator,
specifically in the North Atlantic and Pacific Oceans.
How
many blue whale are left?
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Intermedia whales:
It lives south of the equator, specifically in the Antarctic Ocean.
Previkoda whales:
It is the smallest species, nicknamed the dwarf, and is found in the Indian Ocean and the South Pacific Ocean.
Nutrition :
The blue whale feeds on large
quantities of crustaceans of various types, but its favorite food is Krill,
which are very small crustaceans.
One adult whale feeds on 3.6 thousand
kg of krill per day, or an estimated forty million krill per day. It also eats small quantities of paddles and
various marine plankton that vary depending on the ocean in which the whales
are located, and blue whales in the frozen ocean eat prawns.
Blue whales need 1.5 million calories
daily, and to obtain these large quantities of marine organisms, they need to
dive to a depth of up to 500 metres.
The whale's mouth contains ciliated
plates containing mustache-like hairs at the end of each plate that help it
filter food plankton from the water and benefit from it، Every time the whale opens its mouth
to eat food, it swallows 5,000 kg of water and plankton.The whale pushes the
water out while retaining the plankton through the capillaries and ciliated
plates، Then
he licks it with his chunky tongue.
Although the blue whale is found at
great depths for hunting, it, like all mammals, must rise to the surface of the
water in order to breathe، When
it exhales, it pushes the water in the form of a cloud of steam that rises
vertically due to pressure, and reaches a height of nine meters.
What are special about blue whales?
Pisces extinction risk :
Blue whales are classified as
moderately threatened with extinction, as at the end of the nineteenth century
and the beginning of the twentieth century, the profession of whaling spread in
the Antarctic Ocean and other islands located in the oceans, such as Japan,
Indonesia, and Iceland. Some studies
have indicated that the number of blue whales currently does not exceed only
20,000 whales around the world, and all of this is due to poaching، The number of whales caught from the
Antarctic Ocean alone in 1930 reached an estimated 30,000 whales, and then the
International Whaling Commission banned the hunting of blue whales in 1966.
Despite their large size, these
whales fall prey to attacks by sharks and predatory whales, and are exposed to
wounds and death annually as a result of large ships traveling in the oceans.
Blue whales are exposed to risks
other than hunting, represented by global warming, which increases the
temperature of the oceans and melts snow in the poles, which threatens the
natural habitats of blue whales.
Active maritime navigation in the oceans is also considered to have a significant negative impact on whales, as ships harm and kill whales, and pollute ocean water with harmful and toxic fuel products for whales.
Social life of whales :
Blue whales sometimes swim in small
groups, but it is common for them to swim alone in pairs with each other. Despite the large size of these whales, they
swim gracefully and at a speed of up to 8 km per hour, and their speed may
reach more than 30 km per hour. As for
the sounds of whales, humans are only able to hear them using special sensors,
but they are considered among the noisiest animals on Earth، They communicate with each other
through a series of pulses with low frequencies.These sounds include groans and
groans، It is
believed that whales, if they are present in good conditions, can hear each
other from distances of up to 1,600 km.
Scientists believe that the use of these sounds is not only for the purpose of communication, but it is believed that they exploit their great ability to hear to be transmitted by sound wave frequencies in the depths of dark oceans through the process of sound reflection.
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Whale reproduction:
Since whales are mammals, their
females give birth to their young, unlike other fish that reproduce with eggs.
Whales are born with a complete body,
and the baby whale is called a calf, but whales are considered not densely
reproducing.
The
female whale gives birth once every two or three years, and the gestation
period lasts from 10-12 months.
The period of reproduction and fertilization
begins at the beginning of autumn and continues until winter.
When the calf is born, its mass
reaches 2.5-3 tons, and it is not able to reproduce until it reaches the age of
5 years.
what is a blue whale
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