The habits of killer whales, the habits of whales

The killer whale is a large toothed whale, with a length of 8 10 meters, a weight of about 9 tons, a black back, a grayish-white belly, a pointed dorsal fin, the dorsal fin is curved up to 1 meter, the mouth is slender, the teeth are sharp, the temperament is fierce, carnivore, good at attacking prey, is the natural enemy of penguins, seals and other animals. Sometimes they also attack other cetaceans, even great white sharks, which can be called the overlords of the sea.

Killer whales belong to the toothed cetacean class, which has sharp teeth and mainly eats large fish and sea beasts in the sea, and sometimes minke whales.

The back is black, the abdomen is grayish-white, there is a pointed dorsal fin, the dorsal fin is curved up to 1 meter, the mouth is slender, the teeth are sharp, and the temperament is fierce.

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Cetaceans are completely aquatic mammals, and some rely mainly 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.

Generally, in winter, they swim from the high-latitude cold-water area to the low-latitude hot water area to give birth, and in summer, they swim back to the high-latitude cold-water area from the low-latitude to hunt.

Killer whale movements are generally associated with stalking prey or increasing predation rates, usually during the spawning season and the giving season of seals. In the summer, most killer whales in the Atlantic inhabit the edge of the ice floe or in waterways with ice floe, feeding on baleen whales, penguins, dolphins, seals, etc. Where and how far they will move is still undecided.

Some killer whales stay in Antarctic waters all year round, while killer whales in the Arctic rarely come close to ice floes. According to killer whale researchers in Washington State and British Columbia, there are both sedentary and transiting groups of killer whales, which can be found throughout the year. Some individuals have a very large range of activities, and the results of ** identification in various places have found that some killer whales have a range from Alaska to California in the south of the United States.

Genetic characteristics of killer whales

Killer whales have a matrilineal social form, and the choice of mating partners is more complex, and it is not up to the strength of the males to determine everything: for example, the patriarch of the whale group sometimes lives to be 80 years old, and there are also examples of mating in later years, and the object they choose to mate with is generally the older male in the whale group. Scientists do not know the criteria for the selection of female whales, and rarely observe the mating scene, only knowing that there is a mother, but not where the father is.

There is no father-son relationship and father-daughter relationship in the whale group, and the responsibility of the male is to go out to find food, and then guide the whale group to hunt collectively, with a clear division of labor and no status; The mother-daughter and mother-child relationships are very stable, and they are lifelong relationships that generally do not leave the group. The reason for the appearance of lone whales is usually injury or loss. When the group is too large, it will "break up" and a new group will be created.

Killer whales are widely distributed in the world's seas, such as Japan's Southern Sea and Iceland, and there seems to be no obvious restrictions on water temperature, depth, and other factors. They have a fairly high density of habitat at high latitudes, especially in areas where prey is plentiful.

Killer whales can be found in all areas of the planet, but the largest number of killer whales are found in the offshore waters of Japan, Antarctica, and Norway to the Arctic. There are also many killer whales along the coast of our country.

With the sharp decline of large cetaceans, killer whales have had to change their diets. Precious creatures such as spotted seals and sea otters have become a snack for killer whales. Biologists fear that in the long run, the ocean's food chain will be disrupted, and some marine mammals may be wiped out.