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In the natural environment, the average lifespan is 50 to 100 years, and it can survive for decades.
Whale. It was once thought to be an archaeozoic animal and thought to live up to 500 to 1000 years, but it is said that the average lifespan is only 30 years, and the longest life span is not more than 100 years.
Beluga. The lifespan of the blue whale is generally thirty to forty years, and the lifespan of the blue whale is at least eighty years, and the lifespan of the killer whale.
The lifespan of baleen whales is generally 20 to 35 years, and the lifespan of baleen whales is generally 40 to 50 years.
Although the cetacean is large, it is active all day long, and even its sleep is not still, and in terms of body size, it has a higher rate of metabolism than other large animals.
It is extraordinarily high, so the lifespan is relatively not long.
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At 60-70 years, blue whales are the largest and killer whales are the most ferocious.
General introduction to whales:
Whales are giant creatures in the ocean, the same mammal as dolphins, but larger than dolphinsThe mouth line is shorterThe forelimbs evolved in a flat-fin shape and the hindlimbs degeneratedThere are finsThe tail is broad and flat, with a blowhole.
The cetaceans (suborder Toothed Whale and Baleen Whale and extinct Archaeoceta), the Baleen Whale suborder and the extinct Archaeocetacean, and generally unaffiliated cetaceans are all classified in the Dolphin family of the Toothed Whale suborder.
It is widely distributed, and its traces can be seen in about the world's seas, and it is more group activities for marine sexual behavior, and more group activities are rarely taken when acting alone, and rarely acting alone or dolphins live urns together. Foraging or playing naked.
Like jumping to hit the waves. Whale tail ascends. Whale tail slap and snorkel and so on.
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30-40 years.
Whales are one of the very large creatures that live in the ocean. There are different species of whales, and the lifespans of these different species will vary greatly, with some species generally having a longer lifespan and others having a relatively shorter lifespan.
For example, the lifespan of the beluga whale species is generally between 30-40 years; The lifespan of the blue whale is relatively long, which can reach 80 years or even more; Another example is killer whales, their lifespan is relatively short, maybe only 20-35 years and so on.
This is only in general, specifically the lifespan of a whale can be affected by a variety of factors. Gender, for example, is an important factor. For the same species, the female whale has a relatively long lifespan and the male whale has a relatively short lifespan.
In addition, their living environment has a very large impact on their lifespan. If their living environment is polluted or destroyed, it will seriously affect their lifespan, which is one of the reasons for the gradual decline of whale population.
Introduction to Whales:
Whale is the name of the cetacean in the marine mammals, which are divided into toothed cetaceans and baleen cetaceans, and the cetaceans include the dolphin family under the cetaceans.
Whales live in the ocean. Whales have a thick layer of fat under their skin, known as whale oil, which keeps the whale warm and can also store energy for emergencies. Because the whale has many special structures in its body that allow it to hold its breath and slow down its heart rate in the water for a long time, when it sinks to the bottom of the sea, it always takes a long time before it resurfaces.
In addition to having a structure to store oxygen, when a certain part of the body needs a large amount of blood**, there will be a special function of concentration ** in the body.
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The average lifespan in the natural environment is 50 to 100 years.
The whale was once thought to have a lifespan of 500 1000 years, but it is said that the average lifespan is only 30 years, and the longest is more than 100 years. Beluga whales generally have a lifespan of 30 to 40 years, blue whales have a lifespan of at least 80 years, killer whales have a lifespan of 20 to 35 years, and baleen whales have a lifespan of 40 to 50 years.
Although the cetacean is large, it is active all day long, and even sleep is not still, and in terms of body size ratio, it has a relatively high rate of metabolism compared to other large animals, so its lifespan is relatively not long.
Morphological characteristics
Cetaceans are the most adapted to aquatic life in modern mammals, in the process of transition from terrestrial to aquatic, evolved to resemble the appearance of fish, while body hair degenerated, some cetacean juveniles still have a small amount of bristles on the snout, most of the species fade in the process of growth, a small number of species remain for life, sweat glands and sebaceous glands also degenerate with the cetaceans eventually completely aquatic.
The body of cetaceans is fat and round, slightly barrel-shaped, and streamlined when viewed sideways. In most species, the cervical vertebrae are healed, and the head is directly connected to the body, and it is impossible to twist the head without the body moving. The forelimbs are specialized as flippers, and there are still remnants of the phalanges inside.
The hind limbs are completely degenerated, and only one pair of small bone fragments remain. The posterior part of the trunk is the caudal peduncle, and the left and right ends of the tail extend to form a horizontal caudal fin, which can swing up and down to propel the body forward. Most cetaceans have dorsal fins that stand behind or on their backs.
The above content refers to Encyclopedia - Whales.
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1. The general life expectancy in the natural environment is 50 to 100 years.
2. Cetaceans are completely aquatic mammals, and some mainly rely on echolocation to find food and avoid enemies. They generally feed on mollusks, fish, and zooplankton, and some species can also prey on seals, fur seals, etc. Every once in a while, it is necessary to ventilate.
3. From an anatomical point of view, many of the characteristics of cetaceans show a high degree of adaptation to life in the ocean. However, anatomical evidence is not sufficient to answer many questions about the origin of cetaceans.
4. However, from the perspective of biochemistry and genetics, cetaceans are closely related to ungulates, and the fossil record (about 50 million years ago) also supports the evolution of cetaceans from ungulates.
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1. The general life expectancy in the natural environment is 50 to 100 years.
2. Whales are divided into two categories, one is baleen whales, and the other is toothed whales. Whales belong to the phylum Vertebrates, subphylum Vertebrates, Mammalia, and Euzoa, which contain about 98 species of viviparous mammals that live in oceans and rivers. There are more than 30 species in China's waters.
All species of whales inhabit the ocean, with the exception of a few that live in freshwater.
3. The definition of whale itself is relatively vague, and whales can include all cetaceans, as well as cetaceans of specific families. All dolphins are also included in the whales. There are two main species of whales:
Baleen whales (mysticeti) and toothed whales (odontoceti). Baleen whales are small but huge, with the smallest known species being over 6 meters long, and the largest animal, the blue whale, is also a baleen whale. However, the size of toothed cetaceans varies greatly, with the smallest species only about 30 cm in length and the largest sperm whale more than 20 meters long.
Whales do not belong to the class of fish, but to the class of mammals.
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