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Silver carp (Hypophthalmichthys molitrix) belongs to the order Cypriniformes, family Cyprinidae, subfamily Hypophthalmichthys, and genus Hypophthalmichthys. Commonly known as: silver carp, silver carp, edge fish. English name: Silver carp, Silver loweye carp. The side of
Pike (Esox reicherti) belongs to the order Salmoniformes, family Pike, and genus Pike. It is commonly known as: duck fish, black-spotted pike. Pike grows fast and has a long lifespan. Some people have found individuals weighing 30-35 kilograms and being 70 years old. It is said that the longe
Dormancy refers to an organism in a relatively static state, accompanied by a significant reduction in metabolic activity. Dormancy is divided into two types, namely hibernation and aestivation, but does not include the physiological sleep of the animal's daily cycle. Hibernation is seasonal
Semi-migratory fish refer to the migration of freshwater fish from one type of water body to another type of water body in freshwater waters, as well as the migration of fish that live in shallow sea areas or brackish water areas into rivers. To sum up, it can be mainly divided into two types
The surface of the ocean is very vast, and the difference between depth and depth is also very huge. Although each kind of fish has its own geographical distribution in the ocean, in order to find relatively concentrated food and suitable places for spawning and overwintering, they are more o
Tentaxis refers to the directional action response of animals under unidirectional environmental stimulation. For example, fish move towards light (called positive phototaxis) or backlight action (called negative phototaxis). Taxis is a stereotypic reaction and is the simplest type of instinctive be
Some fish have different colors among different individuals of the same species. The color of sea trout in British rivers is closely related to the surrounding environment. Trout living in river rapids and small water bodies in mountains have many round spots on their bodies; while individuals livi
When the environment changes or when fish are moved to a new environment, the fish will gradually induce a physiological adaptation process under the new environmental conditions, such as the climate adaptation of fish to the new environment and changes in feeding habits. Among them, temperat
Genetic polymorphism manifested by intraspecific individual heterogeneity should be one of the important contents of biological diversity. As early as the 1940s, biologists realized that a species exists in the form of a population containing a large number of mutated individuals, and that a
In 1980, Academician Cao Wenxuan questioned the concept of fauna complex at the annual academic meeting of the Chinese Ichthyology Society, believing that it has no boundaries in time and space and should be abandoned. In 1998, Dr. Liu Huanzhang and others published the paper "Distribution Pa
my country has a vast territory and is located in the southeastern part of the Palearctic zoogeographic zone and the northern part of the Oriental zoogeographic zone. It is the only country that spans two major regions among the six major zoogeographic zones in the world. Our country is locat
The formation of the earth has a history of 4.6 billion years. Initially, there was no life on the surface of the Earth. With the development and changes of the earth, certain substances on the earth's surface have gone through a long chemical process, and have differentiated and developed fr
The earliest hypothesis about dinosaur mating positions was proposed by a scholar named Halstead in 1975. However, due to his understanding at the time, he believed that dinosaurs, like birds, did not have penises and adopted cloacal kissing. He proposed that the male dinosaur would wrap its
Pink-necked beetles are distributed throughout all provinces in China, and abroad in North Korea and the former Soviet Union. It is the main pest of peach trees. Plums, plums, cherries, apples, and apricots in the south and pears and apricots in the north are also seriously affected.
In our country, the star beetle is the most common. Star beetles are also known as citrus star beetles and silver star beetles. The domestic distribution starts from Jilin and Liaoning in the north, to Gansu, Shaanxi, Sichuan, and Yunnan in the west, to Guangdong in the south, and to the coastal pro
The body of the armor is generally elongated, and there are often spikes or knobs on the back and elytra of the body, making it look like a warrior wearing iron armor, so it is called the armor. The iron armor mentioned here is in a narrow sense, referring to the iron armor subfamily of the i
When you see the long tube extending forward from a weevil's head, you might think of an elephant's trunk. However, you must not mistake the long tube on the weevil's head for its nose! This long tube is its mouthparts and is also the main identifying feature of the weevil. Another feature of
The white spots on the hind wings of the red butterfly have various types such as small spots, multiple spots, large spots, and U-shaped spots. Alias: red-bellied swallowtail butterfly, seven-star swallowtail butterfly, red-striped dawn butterfly, red-striped swallowtail