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Whale information
Whales are divided into two categories of the giant beasts of the ocean - cetaceans

The Latin name of the whale is derived from the Greek word "sea monster", which shows that the ancients of this kind of behemoths inhabiting the ocean with the feelings of awe. In fact, the size of the whale varies greatly, small body length of about 6 meters, the largest can reach more than 30 meters, the heaviest 40 million kilograms of weight, the lightest is also 2,000 kilograms. Most of them live in the ocean, only a few species inhabiting freshwater environments, the body shape with the fish is very similar to the streamlined body shape, suitable for swimming, so commonly known as whales, but this similarity is nothing more than a convergence phenomenon on the evolution of organisms. Because cetaceans have fetal, lactation, constant temperature and lung breathing and other characteristics, and fish are completely different, so belong to mammals. The whale's heartbeat in a minute is usually 9~10 times.

Alias: sickle-fin dolphin, sickle-fin spotted dolphin, short-snouted dolphin. The muzzle protrusion is very short, but clearly demarcated from the forehead. The dorsal fin is tall and striking, sickle-shaped and curved back, with a wide basal width. The back of the body is black or black-gray, the belly is white, the front of the head and upper jaw are black, and the lower jaw is black only at the end of the muzzle, the rest is white. Body side white or grayish-white behind the eyes up to the ventral side, from a white band along the lower side of the dorsal road base to the caudal base on the side of the body, and from the corner of the mouth to the anterior base of the fin pecten. And crossing the posterior base of the roadlimb there is a black band between the full anus. The anterior 1/3 of the dorsal fin is black, and the posterior half is grayish white. Flippers similarly black on anterior margin and gray on posterior margin. The upper and lower caudal fins are black or blackish gray. The body color is highly variable. The upper and lower whiskers have 23-36 teeth per side.

Adults are up to 2.5 meters long, with males slightly larger than females and weighing up to 180 kilograms. Many dozens of heads to hundreds of heads of large groups, feeding into small groups, resting or moving and then converge into a large group. Sex lively, swimming speed, often jump out of the water. The body length is about 1.8 meters.

The bait is mainly small grouped fish and squid.

China's East China Sea, the South China Sea are distributed.

The whale is an important member of the sea animals, the body shape like a fish, commonly known as whales.

There are many types of whales, there are more than 80 species around the world, there are more than 30 species in our waters. They are generally divided into two categories. A class of mouth with baleen without teeth, called baleen whales, *** 11 species; another class of mouth with teeth without, called toothed whales, *** more than 70 species. The length of the whales ranges from 1 meter to more than 30 meters.

[edit]Characteristics of whales

The *** same characteristic of cetaceans is a constant body temperature, about 36.0 ℃. The skin is bare, no body hair, only the muzzle has a few bristles, no sweat glands and sebaceous glands. There is no sweat or sebaceous glands. The subcutaneous fat is thick enough to maintain body temperature and reduce the body's specific gravity in water. The skull is well-developed, but the cranial region is small and the facial region is large, with a long muzzle formed by the pronounced lengthening of the frontal and maxillary bones. The neck is inconspicuous, with healed cervical vertebrae, and the head is directly attached to the trunk. The forelimbs are finned, the toes are not separated, there are no claws, and the joints of the elbows and wrists are not flexible enough for swimming in water. The hind limbs are degenerated, but there are still remnants of the pelvis and femur in the form of vestigial bone fragments. The tail degenerates into a fin, with the skin at the end expanding horizontally from side to side to form a pair of large caudal lobes, but is not supported by bone; the vertebrae taper off in the narrow caudal cadre, and finally disappear before entering the caudal fin. The caudal fin, unlike in fish, can be swung up and down and is the main organ for swimming. Some species also have a dorsal fin, which is used to balance the body. Their skeleton has sponge-like tissue and more fat in the body cavity, which can increase the volume of the body, reduce the specific gravity of the body and increase buoyancy.

Their eyes are small, with no lacrimal glands or transient membranes, and their vision is poor. There is no outer ear shell, and the outer ear canal is also very thin, but the hearing is very sensitive, and can feel the ultrasonic waves, rely on echolocation to find food, contact with companions or escape from the enemy. There are 1-2 external nostrils, located on the top of the head, commonly known as the blowhole, and generally the more the nostrils are positioned against the latter the more evolved they are. Breathing with the lungs, the left and right each have a lobe lung, which has many capillaries, elastic, can help the circulation of oxygen, adapted to the gas exchange at the surface of the water, need to surface every once in a while to change the air, but also able to dive for a longer period of time. There are 10-20 pairs of ribs. The stomach is divided into 4 chambers. The kidneys are mostly verrucous. The testes of males are located in the abdominal cavity. Females give birth to and nurse their young in water. The uterus is bicornuate with a pair of breasts located in the cleavage on either side of the genital fissure, with elongated nipples, and the milk is rich in calcium, phosphorus, and a large amount of fat. Cubs have teeth during the embryonic period, but the teeth of baleen cetaceans are replaced by baleen by the time of birth, and the teeth of toothed cetaceans are retained throughout life.

Cetaceans are mammals that live in the water, and they have the same physiological characteristics as land mammals, such as breathing with lungs, foetal birth, etc., but also have a number of special physiological structures that have evolved to adapt to the aquatic environment. Whales are classified as belonging to the kingdom Animel, phylum Chordata, class Mammrha, order Cetacea, and they have the same physiological characteristics as land mammals.

A whale a minute heartbeat only nine, because the cetacean is a mammal living in the water, he has the same physiological characteristics and land mammals, but also with the lungs to breathe, it can be a long time in the water to hold the庄 breathing, slowing down the heart rate. So it can lurk in the water for a long time.

Under the cetaceans and distinguished into two suborders, respectively, baleen whales suborder (suborderMysticeti, blaleenwhales) and toothed whales suborder (suborderOdo-ntoceti, toothedwhales). The division of these two groups, and then the academic is mainly based on their feeding mode of different, baleen whales suborder main morphological characteristics: is no teeth, but has a large baleen, can be used to screen the plankton. Therefore, they are filter feeders. Toothed whales suborder main features: for the teeth, predatory, the number of teeth and the arrangement of its food by the influence will be different, the world's existing 13 families of about 79 species.

Although the whale has the word fish, in fact, it is not a fish, but mammals, it has many and fish are very different characteristics, for example, the general fish is left and right to swing the tail fin to make the body forward, while the whale is up and down to swing the tail fin way forward. They use their front flippers to keep their balance and control their forces, and some whales also have a vertical fin on the upper end of their back! The biggest difference between whales and fish is that whales have nostrils like humans and use lungs to breathe, while fish breathe through gills; whales have smooth skin without scales, while fish generally have scales; whales are warm-blooded, while fish are cold-blooded; fish are ovoviviparous, while whales give birth to their young straight away; mothers have two breasts under their tummies, and the young whales grow up by eating their mothers' milk, and when they're hungry, they use their mouths to rub against their mothers' breasts. The mother whale squirts the milk directly into the mouths of her young with great force.

Whales are herd animals, they usually live in groups in the sea, but when whales breathe, they need to swim to the surface, this time the whale is the use of the head of the spout to breathe, exhale, the moisture in the air will condense and form the familiar fountain. Experts can even recognize whale species by the height, width and angle of the spout! There are many species of whales, roughly divided into two categories: toothed whales and baleen whales.

The whale's epidermis has a very thick layer of fat, that is commonly known as whale oil, it can make the whale body to keep warm, but also can store energy to supply emergency needs. The whale's body has many special structures that allow it to hold its breath and slow its heart rate for long periods of time, so when it sinks to the bottom of the ocean, a long period of time always passes before it resurfaces. In addition to its oxygen-storing structure, it also has a special function that concentrates the blood supply to a part of its body when it needs a large amount of blood!

Baleen whales spout water column and tall and thin, toothed whales spout water column and thick and short, some people can even be based on the water column to determine the species of whale!

Whales are mammals that live in the ocean. Some whales have large bodies, the largest body length of up to 30 meters. The whale's body shape is like a fish, in the shape of a pike. The head is large, the eyes are small, and the ear shells are completely degraded. The neck is inconspicuous. The forelimbs are flippers, the hind limbs are completely reduced; most species have a dorsal fin; the tail is horizontal flippers and is the main locomotor organ. Teeth present or absent. Nostrils one or two, opening at the top of the head. Adults are glabrous (in many species only a few hairs are preserved around the mouth). A thick layer of fat under the skin insulates the body and reduces its specific gravity. Breathing with the lungs, inhaling at the surface of the water, then diving into the water, can be snorkeling for 10 to 45 minutes. Generally feeds on zooplankton, mollusks and fish. They are viviparous, usually giving birth to one calf per litter, and nurse their young in their milk. However, many people recognize them as fish, but in fact they are not fish but mammals. Distributed in the oceans of the world.

Whales are found in all the oceans of the world. It is an aquatic mammal, breathing with lungs, its species are divided into two categories, baleen whales, toothless, baleen, nostrils two, like fin whales, blue whales, humpback whales, gray whales, etc.; toothed whales, teeth, no baleen, nostrils, like sperm whales, narwhals, killer whales and so on. The vast majority of the oxygen in the ocean and 60% of the oxygen in the atmosphere is made by phytoplankton. Baleen whales, however, extinguish zooplankton, the arch enemy of phytoplankton. In addition, toothed whales help maintain the ecological balance of fish. Toothed whales feed on large mollusks that feed on fish. Therefore, the world without whales, human beings will have to die.

Whales have a poor reproductive capacity, on average, only two years to give birth to a young whale. Due to human hunting and environmental pollution, the number of whales has been drastically reduced. For example, in the 20th century, nearly 360,000 blue whales were killed, and currently less than 50 survive. Many species of whales, which have lived on Earth for more than 50 million years, are on the verge of extinction.

The ancestors of cetaceans were also originally animals that walked on land on all fours, and were probably insectivores or carnivores that lived mainly along the seashore, and were later attracted to fish and other food in the water, and after a long time, returned to the ocean from the land and gradually adapted to marine life. The earliest whales appeared in about 55 million ? /FONT>36 million years ago in the middle of the Eocene Eocene, the first whale, the first toothed whales and the late Eocene proto whales, etc., they and the existing whales, the skull is relatively small, the nostrils are located in the front of the head, has not yet been moved to the top of the head, the teeth and the ancient insectivores, carnivorous teeth are similar to the ancient teeth, all are 44 or less than 44, the tooth shape, the skull is very similar, etc., only a few different points, but they already had a body shape adapted to life in seawater, similar to that of fish.

Mark Yohorn, a paleontologist at the Alabama Museum of Nature, explains, "The appearance of the whale tail piece may have been the final step in the transition of the whale from land to sea." In order to explore this mysterious process, Yohorn analyzed and studied the newly discovered ancient fossils. These ancient fossils, discovered by a group of amateur bone hunters along the banks of rivers in Alabama and Mississippi, are fossilized bones formed after the death of the Wolotte Georgia Archaeopteryx. The Wolteria survived about 40 million years ago and roamed the waters of the Gulf of Mexico in North America. This ancient whale was about 3.7 meters long and relied mainly on its sharp teeth to feed on fish. The earliest known whale with a tail piece is closely related to the Wolterian Georgia. But Yohorn found that when the Wolotte Georgian was separated from the rest of the cetaceans just 2 million years later, it was clear that it did not have a tail piece.

Yohorn focused his analysis on a newly discovered caudal vertebrae about 5 centimeters long. This vertebra was one of about 20 tail vertebrae in the Wolterian Georgian Archaeopteryx. Upon analysis, it was found that this vertebra did not resemble the vertebrae near the whale's tail piece. Yohorn then concluded that the Wolotte Georgian Archaeopteryx relied primarily on swinging its hind feet to swim. Previous studies have also concluded that this ancient whale had huge hips, suggesting that they also grew huge hind legs. Strangely enough, scientists also discovered that their pelvis was not connected to their vertebrae. Until now, this phenomenon remains an unsolved mystery. Youhorn said, "The idea that we have confirmed is that this ancient whale relied mainly on swinging its hips in the water and swimming by paddling with its feet. This is similar to how modern whales swim, although modern whales rely primarily on the undulating swings of their bodies to swim."

In the evolutionary history of living things, there has been a missing link from the ancient land quadrupeds to the present-day water mammals. Therefore, scholars believe that the ancient whale fossils found above fill that gap. However, why did the ancient whales move from land to water? It turns out that the ancient whales' reproduction and feeding of offspring were carried out on land, as is the case with amphibians such as sea lions, fur seals and seals nowadays. However, the evolution of organisms is often affected by environmental changes, about 50 million years ago, due to the proportion of food and predators in the water relative to the land environment is easier for the survival of the ancient whales, they began to enter the water; about 10 million years ago, the offspring of the ancient whales evolved with the modern whales are very similar to them, they have a long tail and short neck, the hind feet also degraded to a flipper-like appendage, from then on they just stopped coming ashore.

[edit]Types of whales

Baleen whales are huge, with the smallest species measuring more than 6 meters in length. There are no teeth in the mouth, only in the embryonic development can be seen degraded teeth, but the upper jaw on the left and right sides of the palate to the pharynx each have 150-400 comb-shaped arrangement of keratin baleen. The color, shape and number of the whiskers vary from species to species and are one of the most important bases for classification. There are two external nostrils, located on the top of the head, which can emit two columns of water when breathing. The skull is extremely large, up to 1/3 of the body length in some species, and is symmetrical from side to side. The cervical vertebrae are healed or separated. Sternum small, only 1-2 pairs of ribs connected to the sternum, thorax incomplete. No clavicle. Flipper limbs generally with 4 fingers. The digestive tract has an appendix. They feed mainly on small crustaceans such as krill, and some species also eat small schooling fish, as well as benthic fish and shellfish. Baleen whales in the world there are three families, including right whales, gray whales and fin whales, *** about 6 genera and 11 species.

The body shape of the toothed whales varies greatly, with the smallest species being only about 1 meter in length, and the largest being more than 20 meters. Mouth with cone-shaped teeth, but the shape and number of teeth of different species vary greatly, the least only with a single tooth, the most have dozens of teeth, some also hidden in the gums are not exposed, so it is also one of the important basis for classification. There is only 1 external nostril, so only a jet of water can be emitted when breathing. The skull is asymmetrical from side to side. The fins have 5 fingers. The sternum is large. No clavicle. No appendix. Feeds mainly on squid, fish, etc., and some also prey on seabirds, seals, and other large animals such as cetaceans. Toothed cetaceans in the world **** there are 8 families of puffer whales, sperm whales, saber-nosed whales, narwhals, spinner whales, spinner dolphins, porpoises, dolphins and pilot whales, and so on, about 34 genera, 72 species.

The blue whale is the largest mammal in the world. It can be up to 30 meters long, an average weight of 150 tons, a mouth can be opened to allow 10 adults to freely enter and exit the width. Blue whale is a treasure, its fat can make soap; whale meat is rich in nutrients; whale bone can be refined glue; whale liver contains a lot of vitamins; blood and internal organs and is a high-quality fertilizer.

Ancestors of the whale

"Ambyuroctaurs"

After about one million years from the appearance of Bakiketaeus, the cetacean took another step towards marine evolution. This stage is represented by the 4-meter-long "Ambyuroctetaurus", which means amphibious or walking whale, and if Bakiketaurus was similar to the wolf, Ambyuroctetaurus was similar to the crocodile. Ambyuroctetaurus was discovered earlier than Bakiketaurus. Researchers believe that Ambyuroctaurs was a transitional animal in the development of cetaceans.

The most ecological characteristic of Ambyuroctaurs is that they live in the sea and on land, mostly feeding on marine fish and drinking seawater. It is generally accepted that all mammals form their teeth and bones through the oxygen atoms of the water molecules in their food. Oxygen exists in nature in three isotopes and when they have specific ratios, the ratios are different in seawater and freshwater. Therefore, when analyzing the fossilized bones of Ambyuroctaurs, it was demonstrated that the isotope ratios are more in fresh water, which suggests that Ambyuroctaurs fed on land animals, which gave rise to its bones and physique.

It was somewhat close to the present-day crocodile in this ecology. The eyes were small, and if the body was in seawater, the eyes were exposed to the surface of the water to observe what was going on in all directions. Analysis of its skeleton reveals that its hind toes were long to allow movement in the water, and the front set of feet were not so long to facilitate climbing out. They often lurk in shallow waters, with their eyes watching for an opportunity to sneak up on passing animals.

"Lodactylus"

After "Ambyuroctylus" comes an animal with the appearance and size of an otter, and one that still retains many of the characteristics of "Ambyuroctylus". The ancestors of whales such as the "Lodactylus", which retained many of the characteristics of the "Ambyuroctonus", appeared one after another. It is believed that the Lodactylus species was fully adapted to living in water. The period from the appearance of Bakiketauus to the appearance of Lodeketauus was about 3 to 4 million years. However, it was a brief moment in paleontology.

"Dorton" and "Basilosaurus"

Thereafter, about 39 million years ago, "Dorton" and "Basiliskaurus" were cetaceans with streamlined bodies that could swim smoothly through the ocean. Instead of the long tails of their ancestors, they had tail fins. At 4.5 meters in length, the skeleton of the "Dolton" was similar to that of today's dolphins, although there were some traces of hindfoot degeneration. "The Basilosaurus, on the other hand, had a slender eel-like body, measuring about 18 meters in length, which is larger than most of the world's existing cetaceans. But it also has two tiny hind feet.

The cetaceans that followed Bakiketaurus, and then the "Brazilian Rosa Ursus", are taxonomically known as extinct species of protocetaceans. Among them, the more modern cetacean body shape characteristics of the "Dolton" later evolved into modern toothed whales and baleen whales. However, scientists believe that no fossilized animal bones have yet been found to link "Dolton" to modern cetaceans.

However, it is generally believed that the period close to the time when the protocetaceans evolved into baleen whales and toothed whales, about 34 million years ago, was a period of global sea-level decline. There would have been plenty of global strata to excavate at this time, and sooner or later, if one was lucky, one would have found fossils of the transitional species from protocetaceans to modern cetaceans.

[edit]Value and protection of whales

Cetaceans, because of their great economic value, have been the object of human hunting since ancient times, but in the past, due to the backwardness of the means of hunting, the amount of hunting was relatively small, and it was not yet enough to affect the number of whales. In modern times, people changed to use ships and artillery to hunt cetaceans, killing power greatly enhanced, making the number of whales sharply reduced, many species are on the verge of extinction.

Now, because countries around the world impose strict limits on the number of cetaceans caught each year, whaling has gradually ceased to be a major concern for scientists monitoring their numbers and survival. However, on a global scale, the unprecedented marine pollution caused by human economic development poses a great threat to cetaceans, which is far greater than that of killing, and the rapid development of industrialized fishing also greatly affects the food source of marine mammals such as cetaceans, which is another major factor affecting their survival. People used to imagine the ocean as a symbol of a vast and boundless free world and the possibility of engaging in adventurous activities, so while plundering marine resources with impunity, not only is there a large amount of ocean noise generated by the shipping industry and a large amount of ballast water discharged every year, but also a large amount of garbage dumped into the ocean, and about 100,000 types of chemicals reach the ocean through the discharge of sewage and the air, and organic chlorides, which are difficult to decompose, increase the number of marine organic compounds, which are also difficult to decompose, are also a major factor affecting their survival. Organic chlorides increase the organic content of the ocean, making marine pollution more and more serious, and has brought serious consequences.

The results of modern scientific research show that the ocean is a giant container for storing carbon dioxide from exhaust gases, and that the hot and cold current system has a great impact on the Earth's climate. In the deep sea, where little research has been carried out, there are many unknown plants and animals that are beneficial to human beings, including many potential sources of food and medicines for human beings, which are of great value. Increasing levels of marine pollution will decimate these valuable resources. As a result of the destruction of the ozone layer, the population density of krill living in the waters around the Antarctic has declined dramatically, the number of tails of krill inhabiting every 1,000 cubic meters of seawater has declined drastically from 177.8 tails prior to 1982-1984 to 41.2 tails in 1984-1985. Krill is a crustacean in the ocean, is an important bait for marine fish, cetaceans and other marine mammals, has an extremely important position in the marine biological chain, and it has also received great attention as the largest protein resource remaining on earth. Because cetaceans and other marine mammals are located at the end of the food chain, marine pollution, especially heavy metal pollution and other substances that have a radical effect, seriously weakened their immune system, thus making them extremely vulnerable to viral and bacterial attacks, pollution also prevents females from being conceived or cause abortions, thus greatly reducing their reproduction rate.

The whales have a poor reproductive capacity, on average, only two or three years to produce a calf ... Due to human killing whales and pollution of the marine environment ... The number of whales is gradually decreasing... Blue whales, for example. In the 20th century, 360,000 were slaughtered! There are less than 50 left~! Many species are endangered ....

[Editorial] China's whales

China's cetaceans are very rich in resources, so far found in China's waters has reached 9 families, 26 genera, 38 species, including both blue whales with a body length of more than 30 meters, but also porpoises with a body length of only about 1 meter, in particular, but also has the specialty of the freshwater cetaceans --- albino dolphins (extinct). -albino dolphin (extinct), which is one of the wonders among cetaceans. China's cetaceans, in addition to the albino dolphin and Chinese white dolphin 2 species are classified as national level 1 protected animals, all other species are classified as level 2 protected animals.

China has found a nearly four-ton whale, about seventeen meters long, a tongue has more than a dozen big fat pigs so heavy! It's spacious enough for four people to sit inside and read a book.

[edit]Whale strandings in China

Early in the morning of March 28, 2008, a whale carcass was knocked up by waves onto the beach at Sanya Bay in Sanya City. The carcass had begun to decompose, and the cause of death and its specific species were not determined. Before that, a large group of whales stranded and died in Australia. For the protection of whales, should be increasingly concerned!

Whale stranding is not the first time in our country, but it happens more frequently in the world, and the reason is thought-provoking.

March 10, 2005, Wuchuan, Guangdong Province, 8 meters long and weighing about 4 tons of large whale stranded dead

A body length of more than 8 meters, weighing about 4 tons of the national level of protection of the marine animal large whales, in the afternoon of March 10, 2005 was found in the city of Wuchuan, Dashanjiang Street, near the shore of the village of Liangmei stranded dead.

On March 11, 2008, a whale weighing more than 2 tons ran aground and died in Hainan

In the early morning of March 11, 2008, a whale weighing more than 2 tons was found to have run aground and died in Chaotan Harbor, Jinshan Town, Wenchang City, Hainan Province. The authorities have already buried the whale and will extract the skeleton of the fish to make a specimen for research.

September 1, 2008, three thousand pounds of whale stranded on the Golden Beach

Qingdao Morning News, the evening of August 30, 2008, an adult Japanese beaked whale weighing 3,000 pounds in Qingdao Development Zone, Jinsha Beach sea stranded.

Reasons to explore

[1] Behemoth also helpless - whale stranding behind the helplessness

What exactly makes such a tragedy occur frequently, let's look at what the experts say.

Whales themselves confused?

Scientists have so far not been able to explain why these whales "stranded", but most explanations have to do with the echolocation system in their bodies. A giant whale's eyes are only as big as a small watermelon, and its vision is so degraded that it can only see objects up to 17 meters away, which is very incongruous with its large body. Instead of relying on their eyes to navigate, detect and hunt, they have a highly sensitive echo-ranging skill. They emit ultrasound waves with a wide range of frequencies, which are reflected back to form echoes when they encounter obstacles. The whales use the round-trip time to accurately determine the distance between themselves and the obstacle.

Internal discomfort, the presence of parasites, or the system itself can cause the echolocation system to malfunction, leaving whales disoriented and wandering. Some scientists also believe that when the whales in order to feed with the water trend into the waters of the gentle terrain by mistake, once the tide will cause stranding; and when they swim into the bay in order to chase the fish, to the beach with a large slope to launch ultrasound, the echo is often very large error, or even completely unable to accept the echo, but also will be disoriented as a result. The whales are herd animals, and if one washes up on the beach and runs aground, the rest will follow, resulting in a group death and tragedy.

As early as December 2004, the U.S. magazine Science reported that, according to scientists at the Woods Hole Oceanographic Institution in the United States, some scientists believe that the cause of whale deaths may be caused by them surfacing too quickly. Two scientists from the institute found small holes in the bones of stranded sperm whales, which they interpreted as necrosis of the bones of sperm whales. Sperm whales can dive more than 3,200 meters underwater to hunt for food, and if they quickly rise to the surface, nitrogen rushes out of their bodies to form bubbles. These bubbles become entangled in the tissues, compressing nerves and blocking capillaries, leading to a lack of oxygen in their muscles, and even affecting the bones, causing regional necrosis and leaving multiple small holes. This shows that the sperm whale "suicide" is likely to be the price they pay when they forage for food and rise too quickly.

Did nature contribute?

In 1997, about 300 whales off the coast of the Malvinas Islands committed "collective suicide". Argentine scholars analyzed that the strong activity of sunspots caused anomalies in the geomagnetic field, and a "geomagnetic storm" occurred, which damaged the echolocation system of the whales migrating, causing them to make "directional" mistakes.

Experts at the British National Marine Aquarium have also speculated that the sound shockwaves generated by low-frequency earthquakes at the bottom of the sea may have interfered with the echolocation system of these mammals, which made them mistakenly go to the beach.

Is the human race to blame again?

Environmental pollution has also been cited by environmentalists and scientists as the cause of whale strandings. Scientists believe that those chemicals that pollute the sea water may have disturbed the whales' senses. In addition, Dr. Collette, deputy director of the Center for Marine Mammal Research in La Rochelle, France, believes that sound waves from warship sonar and echo-control meters and the noise of underwater explosions can disrupt the whales' echolocation system.

Several years ago, the U.S. Navy used large sonar equipment in the deep waters of the Panama Islands, and a number of whale dolphins subsequently stranded and died. Investigators from the National Marine Fisheries Service and the Navy say the noise from the sonar caused the deaths of marine life. They found severe noise damage to the whales' ears, as well as blood on the whales' brains and around the ear bones. Scientists say that marine mammals are actually very vulnerable and can be frightened by the slightest breeze. Human maneuvers at sea may also alarm them.

From the above aspects, it seems that the whale stranding occurs for a variety of reasons, but there is also a large degree of reason is due to changes in the ecological environment, I hope that we can pay attention to the ecological protection of the future everyone, pay more attention to information in this area, this kind of tragedy can not happen.

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Lamentation from the deep - Sanya shocked by the dead bodies of stranded whales

[I came to improve ]Related, one class is baleen whales and one class is toothed whales. Baleen whales have no teeth, toothed whales have sharp teeth