CATDOLL : CATDOLL: How many spawning methods do fish have? Are fish animals that live in groups?

1. How many ways do fish lay eggs?

There are three types of fish reproduction: oviparous, ovoviviparous and viviparous.

1. Oviparity is the reproductive method of most fish. Fish lay eggs outside the body, and the embryonic development takes place outside the body. The embryonic development process completely relies on the nutrients in the eggs.

2. Ovoviviparous fertilized eggs develop in the female reproductive tract, mainly relying on yolk nutrition during development, and have no nutritional relationship with the mother, or the mother's reproductive tract mainly provides water and minerals, and finally the mother produces fry. Such as guppies.

3. The embryos of some viviparous elasmobranch fish are connected to the mother through blood circulation. The nutrients needed for embryonic development are not only provided by the yolk of the embryo itself, but also by the mother. There are some protrusions on the wall of the oviduct where the embryo develops, which are connected to the embryo, forming a structure similar to the placenta. The mother sends nutrients to the embryo through this structure. For example, the gray star shark.

2. Are fish animals that live in groups?

Fish are typical gregarious animals, there is no doubt about that. The reason is that if they live in groups in a large enough area, they can find more food chains and a more suitable water temperature environment. In addition, the waters where the fish swim must have a higher oxygen content. Since fish have different water depth requirements, the depths of the waters where they live in groups are also different. This is also the reason why different fish must live in groups in different levels of waters according to their living habits.

3. Don’t Starve Fish Type?

Don't Starve Shipwreck DLC Whale Classification Detailed Explanation

Whales, one is the white whale that hides from people, and the other is the blue whale with red eyes and harpoons on its body that actively attacks. The probability of both appearing is equal.

How to kill whales: I personally recommend using the "spear gun" made from the weapon column. The material is jellyfish bamboo shells. It is simple and easy to obtain with a fast attack speed. A character with normal damage can be killed with 100 damage in 5 hits. It is one of the most powerful weapons in the new version. I personally recommend carrying a few with you when you go out to sea.

Another way to move: attack 3 and move 1. Since the waves from a shipwreck will not hit the ship immediately when they are generated, you can kill the whale without any damage if you move well.

※Note that whales deal high damage, and since ships have no armor, there is a certain risk of death if you are not proficient in positioning.

4. Big fish type?

Grass carp, black carp, bighead carp, Hualien, lotus fish

5. Crucian carp type?

The types of crucian carp include high-back crucian carp, square silver crucian carp, Pengze crucian carp, Qihe double-back crucian carp, etc.

1. Highback Crucian Carp

The high-backed crucian carp is a dominant species that developed in the Dianchi Lake and its water system in Yunnan in the mid-1970s. It is large in size, grows fast, and has strong reproductive capacity. It is named after its high back. The maximum individual is 3,000 grams. It is highly hydrophilic and is not suitable for breeding in the mainland.

2. Founder Silver Carp

Originally produced in Shuangfeng Reservoir, Fangzheng County, Heilongjiang Province, Fangzheng Silver Crucian Carp is a better variety of silver crucian carp. Its back is black-grey, its sides and abdomen are dark silver-white, and its maximum individual weight is 1.5 kg, but generally it is around 0.5 to 1 kg.

3. Pengze Crucian Carp

Pengze Crucian Carp is a fine crucian carp variety selected and bred by aquatic science and technology personnel in Jiangxi Province. It has delicious meat, high meat content and rich nutrition. It is plump, easy to transport, easy to temporarily raise, easy to catch, and conducive to live fish listing. It is also a fish that can be developed for both production and fishing.

4. Qihe River Double-backed Crucian Carp

Qihe Double-backed Carp is named after the Qihe River, a mountain river flowing from east to west in Qi County, Hebi City, Henan Province. The Qihe River never freezes all year round. From January to February, the water temperature is still above 10℃, and the riverbed of the Qihe River is covered with aquatic plants. The excellent ecological environment has created good conditions for the growth and reproduction of Qihe Carp. The meat of Qihe Carp is tender and delicious. According to ancient records, Qihe Carp, seedless dates and silk-wrapped duck eggs are the three major tributes of the local area.

6. What type of fish is tilapia?

Tilapia - native to Africa, it is a tropical fish. The genus Tilapia includes more than 100 species, including subspecies. Tilapia has the characteristics of fast growth, high yield, omnivorous diet, few diseases and strong reproductive capacity.

7. What are the types of groups?

Groups are the opposite of individuals and are communities of individuals. When different individuals are combined according to certain characteristics, carry out common activities and interact with each other, a group is formed. Individuals often achieve the purpose of participating in social life and becoming members of society through group activities, and gain a sense of security, responsibility, family affection, friendship, care and support in the group. Types of groups:

1. According to the purpose and nature of the interaction among group members, groups can be divided into formal groups and informal groups. This division was first proposed by psychologist Mayo (E. Mayo, 1931) in the Hawthorne experiment.

2. According to the size of the group and the way of communication, the group can be divided into large groups and small groups. This division is vague because the size of the group is relative.

3. According to the psychological yearning degree of group members for the group, the group can be divided into member groups and reference groups. Extended information: Functions of the group: 1. Complete organizational tasks and achieve organizational goals. This is the group to the organization. As a group, it can only survive in activities, and its activities are to complete the tasks of the organization. A group is an organic combination organized by several people. It has advantages that a single person does not have when carrying out activities. For the common goal of struggle, members cooperate with each other, develop each other's strengths, and complement each other's deficiencies, which makes the group generate tremendous motivation, promotes the smooth progress of activities, and completes tasks successfully. 2. Meet the various needs of group members. This function of the group refers to the group to the individual. After the group is formed, the various needs of its members are met by relying on it. And the group itself just happens to have this function.

8. What are the signs before fish spawn?

Before fish spawn, the signs vary for different fish.

Mainly, the color of the male fish will become brighter than that of the female fish (nuptial color). When the female fish reaches sexual maturity, her abdomen will be more swollen, and the male fish will constantly chase the female fish.

The reproduction method of oviparous fish is: the male and female broodstock ovulate and fertilize at the same time, and the eggs are fertilized in the water. The vast majority of fish reproduce from oviparous offspring, but due to different species, their maturity, mating, spawning process, egg characteristics, etc. are also different. Even for the same fish, the maturity period varies greatly between different genera and species. Generally, small fish can mature in a few months and can reproduce once in 2-3 weeks or a few weeks; while large fish can mature in several years or more than ten years and reproduce once a year. For female fish to lay floating eggs, male fish will first spit foam to make a nest. Some male fish will gather grass to make a nest, and the fertilized eggs will hatch in the floating nest. Some fish eggs need to hatch in the starting drift of the water flow. For female fish to lay sticky eggs, the fertilized eggs need to adhere to water plants or other objects to hatch. The fertilized eggs of sinking eggs sink into the gaps between gravel to hatch. The spawning process and the time when fertilized eggs hatch fry also vary from species to species. Water temperature, light, water quality, dissolved oxygen content, etc. will also affect the hatching of fertilized eggs. If there are any deficiencies, the incubation period will be prolonged, the hatching rate will be reduced, and even deformed seedlings will be produced. Therefore, when artificially breeding these fish, it is necessary to understand their reproductive characteristics in advance and operate carefully. Female oviparous fish may carry a large number of eggs and lay a large number of eggs, but the number of fry obtained may be small, and some may even be far less than the number of eggs laid. Due to various reasons, the eggs laid by female fish are affected in three aspects: fertilization, hatching and survival of fry.

9. In what season do fish begin to spawn?

Fish usually spawn from March to May, with the largest number of eggs laid in late spring and early summer. There are some differences due to temperature differences. The temperature in the northern region is lower, so the ovulation time is later. The condition for spawning is that the water temperature reaches above 14 degrees Celsius, preferably 18-25 degrees Celsius.

Oviparous reproduction: refers to the reproduction of fish through external fertilization. When the fish reaches sexual maturity, the female fish releases eggs and the male fish releases sperm. When the eggs and sperm meet and combine in the water, the fertilization process is completed. After a period of time, these fertilized eggs will slowly develop and become small fish.

10. How to fill in the group type?

The objects of group type are mainly classified and filled in by the staff or positions in the public sector. Factors such as the nature of the group's work, the degree of responsibility, qualifications and working environment should be considered. Different types of tables have different group classifications filled in according to different practical situations. Generally speaking, the employees can be divided into management personnel, technical personnel, logistics personnel, etc.