What does migration mean, what does migration mean?

Due to seasonal changes, food searches, reproduction and other reasons, marine fish periodically flock in groups for long-distance directional swimming, which is called migration. Fish that live in freshwater swim to the ocean to spawn during reproduction, which is called sea migration, such as eels. Fish in the ocean go to freshwater to spawn when they breed, a phenomenon called anadymic migration, such as salmon.

Zhuyin one

Pinyin huí yóu

Basic DefinitionSome animals (mainly fish) migrate regularly along certain routes due to spawning, foraging, or seasonal changes. It is also used as a return tour. See "Seasonal Migration" and "Reproductive Migration" to clear the mess.

English (of fish) to migrate Chinese Dictionary Revised Version Migration Zhengbi 1 Some creatures in the ocean move regularly back and forth in a certain direction to meet their living needs, such as foraging and laying eggs.

1. Migration refers to the phenomenon of fish swimming from one body of water to another because they need to breed, ask for bait or overwinter.

2. Migration is generally divided into four types, the first is complete migration in the ocean; the second is to swim from the ocean migratory chain to the middle and upper reaches of the river; the third is migration from freshwater to the sea; The fourth is to swim from one type of body of water to another, but basically all in fresh water.

What does it mean? What does "migration" mean? The meaning of "migratory imitation rent" is:

Some animals in the ocean, mainly fish, migrate regularly to and from certain routes due to spawning, foraging, or seasonal changes. It is also used as a return tour. See Seasonal Migration, Biological Migration per Mu.

洄游 in Modern Chinese Dictionary, page 579 洄游 Explanation in Hanyu Cihai 洄游 Explanation in Recompiled Chinese Dictionary.

What does "migration" mean?

Some animals (mainly fish) in the ocean migrate regularly to and fro along certain routes due to spawning, foraging for ants, or seasonal changes. It is also used as a return tour. See Seasonal Migration, Reproductive Migration.

贄游 in Modern Chinese Dictionary, p. 579 贄游 Explanation in "Chinese Cihai" 洄游 Explanation in "Recompiled Chinese Dictionary" Use migration to form sentences.

1.Frogfish are migrating. >

Migratory refers to the phenomenon in which fish swim from one body of water to another for breeding, foraging or wintering. There are generally four types of migration, the first is complete migration in the ocean, the second is migration from the ocean to the middle and upper reaches of the river, the third is migration from freshwater to the sea, and the fourth is swimming from one type of water body to another, but basically all in freshwater. <

Migratory means that fish periodically move back and forth for some reason, generally due to physiological requirements, genetics or external factors. Some fish migrate from one sea area to another, some from the ocean to the middle and upper reaches of a river, and better yet, the opposite, from freshwater to the sea, and still from one freshwater body to another.

1. Reproductive migration: reproductive migration is the most common reason for migration, fish want to migrate to the spawning ground for spawning, the distance of this migration can be long or short, some swim from the open sea to the coast, some swim from the river to the estuary, and some swim from the lake ** to the lake, these migratory destinations have the same characteristics, that is, plankton is abundant, suitable for the growth of juveniles.

2. Bait migration: As the name suggests, bait migration is due to lack of food, so it is necessary to swim to a water body with more abundant food, usually in this process, the fish can complete the purpose of predation.

3. Wintering migration: The water temperature decreases in winter, although the fish are ectotherms, they will also feel uncomfortable for low temperatures, affecting their vitality and appetite, so they will find warm waters by migrating. In this case, the speed of migration is often related to the temperature of the environment, if the water temperature is low, the swimming speed is faster, if the water temperature is suitable, the swimming speed is very slow.

4. Other migration: When the water flow changes, and encounters some other conditions, the fish will also have the phenomenon of migration.

1. Migration refers to the phenomenon that fish swim from one body of water to another due to the need for breeding, slag monitoring or wintering.

2. Migration is generally divided into four types, the first is complete migration in the ocean; the second is migration from the ocean to the middle and upper reaches of the river; the third is migration from freshwater to the sea; The fourth is to swim from one type of water body to another type of water body, but basically it is all freshwater.