Fish habits, fish habits?

1. Fish activities have a certain regularity, generally swim to the shallow water near the shore in the morning and evening to feed, and at noon in the deep water in the center of the river and lake.

2. Most freshwater fish.

They all like warmth and fear the cold. Their active temperature is 18 -28 , and the fish have a high desire to feed during this temperature, so the fishing effect is also good.

3. Generally speaking, the most common food of fish is mainly small fish, shrimp, and plankton on the water surface.

Seeds and young leaves of various plants, insects, etc. Therefore, in general, places with a lot of these foods will become a natural gathering place for fish.

4. Generally, when night is about to fall, everything begins to become silent, and fish begin to emerge from the deep water area to the shallow water area to feed.

5. In the morning of summer, the temperature is generally 20-26, and the water temperature is between 22-30, which is the best water temperature for fish to eat, and this is the best time for fishing.

Fish live in water, most fish are oviparous, they have their own mating and breeding seasons, and many fish have fixed spawning grounds.

1. Different inhabited water layers.

Various types of fish, due to their different food needs, often inhabit and move in different water layers. For example, silver carp and bighead carp mainly prey on plankton, so they often inhabit the upper layers of water bodies with more plankton. Grass carp and bream love to eat the roots, stems and leaves of aquatic plants, and often inhabit the middle and lower layers of water. Carp and crucian carp mainly feed on benthic organisms, usually inhabiting the bottom of the water. Catfish and yellow catfish, which not only like to eat benthic animals, but are also afraid of light, burrow into burrows during the day, and only swim in large numbers on cloudy days and at night, feeding on the bottom of the water.

2. Habit of chasing warmth.

When the natural water temperature is low, all kinds of fish like to move to the sunny waters to feed. In early spring and late autumn, the shallow, leeward waters are warmer during the day and the fish like to swim and feed. The temperature difference between morning and evening is large, and the water temperature in shallow water drops quickly and drops greatly, so fish go to the deep water where the water is relatively warm.

3. Migratory habits.

The migration of fish in the water body with a certain time, range, direction and distance is called migration. The law of migration is directly related to water temperature, bait and spawning, and it is called "moderate temperature migration", "bait migration" and "spawning migration" in aquaculture.

Fish migrate in different directions and distances, from deep to shallow sea, from shallow to deep sea, from south to north, and from north to south. Anadromous adults live in the ocean, and when they reach sexual maturity, they travel back to rivers to reproduce. Such as salmon, trout, shad, sturgeon and other fish.

Juvenile migratory fish live in rivers and swim to the deep sea to breed when they mature, such as eels.

Vertical migrationMany fish have the habit of moving up and down in the water body, which is called vertical migration or vertical migration. The vertical movement time of various fish species is often fixed, with a certain rhythm within 24 hours of day and night, and the water layer reached by their vertical movement is different.

4. Wave-by-wave habits.

Ponds with wide waters often cause large waves on windy days, which push plankton and other food to accumulate in the downwind inlet, and these bait are hit by the waves, making this area a natural feeding ground for fish.

5. Cluster habits.

With the exception of catfish and blackfish, most fish prefer to live in groups.

6. Oxygenotactic and quiet habits.

Dissolved oxygen is slow in windless weather, and dissolved oxygen is good when the waves are large, and fish will be very sensitive to transfer to waters with high oxygen content. This is the main reason why fish like grass, currents, waves, and shallows. In addition, tranquility is also one of the distinctive characteristics of fish.

7. Phototaxis habits.

Light has a significant impact on the lifestyle and habits of fish. Fish of the same species respond differently to light in different sea areas due to differences in the environment.

Fish swim around underwater and breathe by gills for the main purpose of foraging. It is an ectothermic animal, and its body temperature changes with the water temperature, and the water temperature changes in different seasons will affect the range of activities of the fish. When the weather is hot and the air pressure is low, the fish will be anorexic.

When the water temperature becomes low, the metabolic function of the fish will slow down and they will refuse to eat. When the water temperature is right and oxygen is sufficient, the fish will be more active and will actively forage.

Extended Materials. Fishes are ectothermic aquatic vertebrates that breathe with gills, swim through the swing of the tail and trunk and the coordination of fins, and feed on the upper and lower jaws, and belong to the vertebrate subphylum of the phylum Chordates, and generally people divide vertebrates into five categories: fish, birds, reptiles, mammals, and amphibians.

According to the statistics of the late Canadian scholar Nelson in 1994, there are 24,618 species of fish in the world, accounting for more than half of the named vertebrates, and new species of fish are constantly being discovered, with an average of about 150 species per year, and more than 1,500 species should have increased in more than ten years, and there are currently about 32,100 species of named fish species in the world.

Different fish have different habits, take silver carp as an example.

Silver carp is a typical pelagic species, which is found in the pelagic layer of the water column in spring, summer and autumn, and enters the deep water area after winter. As a filter-feeding fish, silver carp will use gill filtration to select useful plankton in the water during feeding, and when silver carp is in the fry stage, it mainly feeds on zooplankton in the water. After growing to the left hind, it mainly feeds on phytoplankton in the water body, and prefers to eat grass carp excrement, chicken and cow feces, bean dregs powder and artificial micro-particle feed. In addition to plankton, silver carp will also ingest a lot of putrid bait in spring and autumn. In the summer, because the water level is low, the amount of food is larger; In winter, silver carp tend to eat less and move less.

In summary, silver carp is suitable for farming in fertile water. Silver carp is a kind of high temperature fish, the most suitable temperature is 24 30, the appetite of silver carp in summer is very strong, so the rapid growth period of silver carp in northern China is generally concentrated in July and September, and the appetite of silver carp will gradually decline after the beginning of autumn. The silver carp itself has a lively personality and likes to jump, but it is more clumsy.

The water in which the silver carp lives needs to have enough oxygen, and if there is a lack of oxygen in the water, it will immediately float and die quickly. However, on the whole, the growth cycle of silver carp is shorter and the survival rate is higher, and the sexual maturity age of silver carp is usually 1-2 years earlier than that of grass carp. Mature individuals are also smaller, and females of more than 3 kg can reach maturity.

Spawning in April and May every year, the absolute number of eggs is 20-250,000, and the spawning period is similar to that of grass carp. Under pond conditions, if the bait is sufficient, the fish can grow up to 500 800 g in the current year, and the weight of the three-yearling fish can reach 3 4 kg, and in natural rivers it can weigh up to 30-40 kg.

Answer 1: Little goldfish are lively by nature, like to swim, like to jump. 2. Little goldfish like to grow in the sun, and their body color will become more gorgeous. The little goldfish likes to eat, and under the right water temperature, the goldfish will eat non-stop, and it is a very edible ornamental fish.

3. The little goldfish will not sleep at night, and will only enter the state of hibernation and do not swim when the water temperature is under the bottom in winter.

1. Fish live in the water, distributed in the ocean and freshwater, two-thirds of the fish live in the ocean, and the rest live in freshwater.

2. Fish are aquatic animals that are smooth and spindle-shaped, streamlined, finned, and breathe with gills, but more species do not meet this definition. Some fish are extremely long, while others are extremely short; Some are flattened on the sides, some are flattened; Some fins are large or complex in shape, while others are degraded or even digested; The shape and position of the mouth, eyes, nostrils, and gill openings vary greatly.

3. Fish are mostly cold-blooded, and a very few are warm-blooded, breathing with gills and having jaws and fins. Extant fish can be divided into two main groups: cartilaginous fishes (e.g., sharks, etc.) and bony fishes (fishes with linear and wavy fins).

4. There are also some fish that show a special body shape due to adapting to the special living environment and lifestyle, such as sea dragons, sunfish, river fish, flounder, box fish, etc. Regardless of the size of the fish, it can be divided into three parts: head, trunk and tail. It is characterized by the absence of a neck.

The habits of fish.

1. Poor oxygen tolerance, the fish has very poor resistance to hypoxia, and the lack of oxygen in the water will soon float or die directly.

What are the habits of fish.

2. Currentism, the fluidity of fish is based on the perceived flow rate and the preferred flow rate as the index.

3 The sensory flow velocity of all kinds of fish is roughly the same, and it can be assumed that the sensitivity of fish to the sense of water flow is roughly the same.

4. Timid and afraid of being disturbed, when they are disturbed or touch the network cable, they jump out of the water and escape over the net.

Poor oxygen tolerance: Fish need to surface when they lack oxygen in the water, and they will die directly if they lack oxygen for a long time. Breathe with gills:

When living in water, it mainly breathes through the gills of fish. Swim by fins: The role of the tail fin is to provide power and steering, and the role of the fins such as the pectoral fin and pelvic fin is to maintain balance.

Oviparous reproduction: Laying eggs after mating during the breeding period.

1. Poor oxygen resistance

Fish mainly live in the water, but when there is a lack of oxygen in the water, they need to surface immediately, and they will die directly if they lack oxygen for a long time, and the fish can not leave the water.

2. Breathe with your gills

Unlike land animals, the gills need to be moist in the water to breathe, and some fish can breathe in the water with the help of other organs, such as loaches that can breathe through the intestines.

3. Swim with fins

Fish rely on fins when swimming, and fins are divided into five categories, namely pectoral fin, dorsal fin, caudal fin, anal fin, and caudal fin, where the role of the caudal fin is to provide power and steering, and the role of pectoral fins, pelvic fins, etc., is to maintain balance.

4. Oviparous reproduction

The mode of fish reproduction is oviparous, after mating during the breeding period, it will lay eggs in the water, and it will also hatch in the water, and a very small number of species will hatch and produce in the fish, and the fish species are divided into omnivorous fish and carnivorous fish.