What are the benefits of scavengers, the harm of scavengers

Scavengers like to eat bait and dirt from aquariums and purify the water.

Scavengers are omnivorous fish that feed on algae, benthic animals and water waste, and can also devour fish eggs and fry in large quantities. In the aquarium, it is often attached to rocks, glass to stabilize the body and suck algae, and also looks for benthic animals (such as water earthworms), and is a loyal "cleaner" in the aquarium. It is a nocturnal fish that can be polycultured with healthy species of fish.

Scavengers like to eat feed, especially heavy small pellet feed, which is easy to suction cups, and for small pellet feed floating on the water surface, it will be sucked by the belly upside down against the water surface.

Still, the scavenger can clean the walls of the fish tank. The places it rubbed were exceptionally clean. The scavenger's mouth is like a vacuum cleaner, sucking fish feces and green plants into his stomach.

The scavenger feeds mainly on fry, seaweed, bacteria, and feed, and eats a small amount of fish excrement when he is hungry, which is also the origin of his name.

The dangers of scavengers

1. Destroy the aquatic ecological environment.

In addition to eating fish, scavenger fish also eat a large number of native aquatic plants, and spread diseases, destroy the nutritional structure and biological chain, thereby destroying the aquatic ecological environment.

2. Survive in large numbers.

Scavenger fish has a strong reproductive ability, breeding twice a year, can lay more than 2,000 eggs at a time, the survival rate is very high, fish eggs can become fry in about four days, even in the case of lack of water.

3. Cause the extinction of other fish.

Scavenger fish are native to Latin America, are exotic species, can easily grow and reproduce in water, and natural predators have not been found during farming, so no natural predators have been found. Once released, it feeds on other fish eggs, eating 3,000-5,000 eggs a day, leading to the extinction of other fish.

Introduction to Scavengers

The scavenger is named because he likes to eat the bait and dirt of the aquarium and purifies the water, so it is also known as the sucker fish, the suction catfish, the scientific name is the catfish, which is native to the rivers of South America and can often be seen in Central America.

The body of the fish is semi-cylindrical, the tail fin is shallow forked, it likes weak acidic soft water, the suitable water temperature is more than 2 0, the adult body length reaches 3 0 cm, can not overwinter naturally, and is active at the bottom of the water body. At first, it was welcomed by consumers and farmers because of its strong adaptability, easy feeding, omnivorous, low oxygen tolerance, high catch rate, etc.

A scavenger is another name for a variety of professions: a killer, a trailing centreback who takes on specific defensive tasks in football, a cleaner, an obstacle sweeper, a bounty hunter.

The scavenger's scientific name is the lower mouth catfish, which is native to the rivers of South America and was later introduced to China to breed in large numbers. His mouth can be attached to various places in the fish tank like a suction cup. It is a species of benthic fish.

The scavenger spends most of the day lying on the bottom of the tank or clinging to a corner of the tank, and at night he begins to move and eat, and is a nocturnal fish.

Because scavenger fish is a very omnivorous aquarium organism, whether it is algae, dead fish carcasses, moss, fish insects, as long as it can be eaten, it will not refuse to come, and eat them all. Therefore, it is also called "killer scavenger".

Because of these attributes of scavengers, a variety of professions are called "scavengers":

1. Killer. Calling the profession of "killer" a scavenger is a metaphor for the world. Killers are paid to carry out deadly attacks on a target or group of people (e.g., families, small groups).

This type of action may be a direct raid into the place where the vertical number of Qi marks are located, and a direct deadly attack.

2. A lagging central defender who undertakes a specific defensive task in a football game.

In the 8th World Football Championship in 1966, under the influence of the tactical idea of "sticking to the offensive steadily", in order to strengthen the defense, a player was arranged behind the back line.

3. Cleaners.

In the old days, the cleaners of the city were also called scavengers, because their job was to clean and collect garbage and send it to the designated collection point.

4. People who remove obstacles.

In the TV series "Detective Chinatown", the actor Lin Mo was a scavenger who walked behind the neon and noise of Bangkok, between law and crime. The scavenger here mainly refers to the crime scene cleaning experts, and the main job is to erase the traces of the crime scene, cover up the evidence, and remove obstacles. The difference between them and the killer is that they only remove the corpse, not the **.

<>5. Bounty hunters.

The scavenger in anime is a bounty hunter, which mainly refers to a person who earns bounties by hunting down criminals, protecting people, actively gathering intelligence, etc.

What is the role of a scavenger

With the continuous acceleration of urbanization, the problem of garbage has become more and more the focus of people's attention. And in this problem, the profession of scavenger undoubtedly plays an important role. So, what exactly is the role of a scavenger?

1. Maintain the sanitary environment of the city

The first task of the scavenger is to clean up the garbage and dirt in the city and maintain the sanitary environment of the city. In this process, the scavenger needs to carefully count the garbage, sort it and dispose of it, and collect it and transport it to the designated location. Only by doing a good job in garbage disposal can we ensure that the urban environment is clean and tidy and provide citizens with a healthy and comfortable living space.

2. Maintain the safety of citizens

In the course of their work, scavengers also need to pay attention to maintaining the safety of citizens. For example, when removing garbage on the street, you need to pay attention to the safety of vehicles and pedestrians; When dealing with hazardous waste, you should also pay attention to protecting your own health and the health of the surrounding citizens. Through this work, the scavengers are not only the city's environmental sanitation workers, but also the guardians of citizens' safety.

3. Inherit culture and highlight value

In the reform and construction of the city, the profession of scavenger has been silently making stupid contributions to the city and its citizens. Not only that, but the scavengers also inherited some unique cultural and values, such as "cleanliness is virtue, virtue is character" and so on. The inheritance and development of these values is also part of the scavenger culture.

4. Promote the progress of urban management

With the continuous improvement of urban management awareness, the profession of scavenger is also constantly developing and improving. From the very beginning of manual cleaning to the current mechanized cleaning, from simple garbage collection to the current classification and treatment, with the continuous iteration of science and technology, the profession of scavenger is constantly improving and improving. Through such reform and progress, it also promotes the continuous optimization and development of the urban management system.

What is the role of a scavenger

A scavenger is a person who is responsible for cleaning up garbage and cleaning in public places such as cities, communities, parks, etc. Although some people will ignore their existence, however, scavengers play an irreplaceable role in urban management and environmental protection.

1. Maintain urban environmental hygiene

The main job of a scavenger is to clean up garbage, sewage, and sludge in the city to ensure environmental hygiene in public places. Without scavengers, the city's garbage would pile up in mountains, causing stenches and the spread of disease, affecting people's health. The job of a scavenger requires endurance and requires working in the sun, in hot and cold weather, to guarantee the hygiene of the urban environment.

2. Promote the efficiency of urban management

Some cities use health organizations or cleaning companies to carry out scavenger work, and these organizations assign teams of scavengers to different streets and neighborhoods. These scavengers clean up garbage and keep public places clean on a regular and planned basis. They work collaboratively throughout the city to promote the efficiency of urban management.

3. Improve the quality of the environment

The need for scavenger work requires constant communication to raise awareness of environmental protection. The scavengers often remind citizens not to litter and take care of the environment, and also release relevant promotional materials and programs. The public's concern about the quality of the urban environment is gradually increasing, and people are beginning to know how to be willing to maintain and protect various environmental resources.

4. Improve the lives of residents

Scavengers maintain hygiene in public places and can bring a healthy and comfortable living environment to citizens. A city that is cleaned regularly and orderly not only looks clean and tidy, but also contributes to the happiness of its citizens. Citizens can relax in public places such as parks and gardens, and feel the management guarantee behind the city's cultural environment.

Harm to fish: Scavenger fish have a strong ability to eat moss when they are young, but when they are adults, they will no longer eat moss, and they will also have the habit of sucking fish. In addition, adult scavengers also like to eat fish eggs, and some scavengers who have not had food for too long will also eat small fish.

Harm to the environment: Scavengers are invasive alien species and have no natural predators in the wild in our country. If they are released into the wild, they will damage the local ecological environment.

1. Harm to fish: When the scavenger was young, he would eat the moss and algae in the fish tank, and he would also eat some food left by the fish. However, when they become adults, they will prefer meat and will have the habit of sucking fish.

If other fish in the tank are injured, they will keep sucking the mucus from the other fish until they die. When the fish die, the scavenger quickly eats their carcass. In addition, the scavengers also like to eat fish eggs.

In very hungry cases, they will also eat smaller fish.

2. Harm to the environment: scavenger fish are invasive alien species, they have strong adaptability, and they are harmful to the environment, plus they have no natural enemies in our country, if accidentally released into the wild, it will seriously damage the local ecological environment.

If the scavenger doesn't want to raise it, you can choose to give it away, or you can ask the local aquarium if it's **. Under normal circumstances, aquariums are ** fish. If they can't be gifted, they can be killed.

It is important to note that scavengers cannot release animals because they have no natural predators in the wild in our country, and if they are released into the wild, they compete with local fish for food and eat the eggs of other fish. Moreover, their reproduction is relatively large, and if left unchecked, the native fish are likely to disappear.

Harmful. Scavenger fish are suitable as scavengers because of their habit of sucking algae and benthic animals. However, polyculture with mild or small fish should not be avoided.

If it reproduces in large numbers, it will devour the eggs of other fish, leading to the extinction of other fish. There are no natural predators in China yet, so be cautious. It cannot be released, and in some parts of the south, the fish has been overrun, resulting in the extinction of the native fish of the entire river!