Recently, Tiejianjun can always browse the news about "Catching Alligator Gar " online. Do students know what alligator Gar is? Why capture alligator gar? Today, let Tiejianjun tell you about the relevant knowledge~
My name is
5 crocodile gar
crocodile gar
crocodile gar
crocodile gar gar family, big genus
The largest of the seven species of gar fish in North America, with a length of up to 3 meters. The crocodile gar is long and cylindrical, with short kisses like crocodiles. It has two rows of sharp teeth like daggers on the upper and lower jaws, and has super hard enamel fish scales all over the body (the hardness is comparable to that of human teeth). Alligator gar is mainly distributed in rivers and estuary waters along the coast from Mexico to Florida, USA, the downstream of Missouri River and Ohio River , and even two lakes in Nicaragua . They are not native fish species in my country.
Why should we catch alligator gar?
Alligator gar is a more ferocious carnivorous fish. "As long as it is a living thing in the water, it eats almost all." Its presence will have a negative impact on the local water ecosystem. It is also a certain degree of aggressiveness and is very likely to attack humans after being frightened. It is a very dangerous alien invasive species.
What is an invasive alien species?
Article 2 of the " Management Measures for the Management of Invasive Species " which will be implemented on August 1, 2022 stipulates that invasive alien species refer to alien species that are introduced into colonization and pose threats or harm to ecosystems, habitats, and species, affect my country's ecological environment, and damage the sustainable development of agriculture, forestry, animal husbandry and fishery and biodiversity .
The "2019 China Ecological Environment Status Bulletin" released by the Ministry of Ecology and Environment shows that more than 660 invasive alien species have been discovered in China. Alien species that have posed or have potential threats to natural ecosystems have been included in the " List of Invasive Alien Species in China", including 71 species including African Snail , Fushou Snail , Bullfrog , etc.
What are the dangers of invasive alien species?
01
The alien species that have successfully invaded often directly or indirectly reduce the biodiversity of the invaded places, change the structure and function of the local ecosystem, cause the death or extinction of local species, and ultimately lead to the degradation of the ecosystem, the loss of ecosystem functions and services.
02
Invasive alien species will directly or indirectly endanger human health.
03
Invasive alien species continue to reproduce and spread, which may cause the collapse of the food network structure, leading to the degradation of local species, sharp decline in diversity, or even extinction.
What are the ways for organisms to invade ?
Invasive species often have strong reproduction and transmission capabilities. After successful invasion, the population will be rapidly expanded and new populations will be established in new habitats. They usually invade through the following three ways:
01 Natural invasion
refers to the natural migration of plant seeds, animal eggs or larvae and microorganisms through the spread of wind, water flow or insects and birds, causing biological harm.
02 Unconsciously introduced
External species such as foreign species are mainly introduced into new environments as "smugglers" or "free rides" through aircraft, ships, trains, cars and other means of transportation.
03 consciously introduced
This points out that for the purposes of agriculture, forestry, animal husbandry and fishery production, landscape beautification, ecological environment transformation, etc., species were introduced artificially from abroad, but after introduction, it caused species flooding.
In recent years, people have wanted to buy and raise non-national species out of curiosity, show-offs, and stimulation. Some criminals seized people's psychology and brought non-local species into the country in an abnormal way, and illegally sold them; some merchants also introduced non-national species into the country through import and export trade , and then abandoned and illegally released animals, which eventually led to the invasion of foreign species.
How to protect our country's ecological environment from
invasion of alien species?
01
comply with the relevant provisions of the " Biosafety Law of the People's Republic of China " and "Regulations on the Management of Invasive Alien Species". If you introduce, release or discard foreign species without permission, you will be punished accordingly.
02
. If you don’t want to raise it, please contact the relevant departments in time and handle it properly to avoid “stroll pets” destroying the ecological environment.
03
Release animals with caution, and query relevant information on the information system for invasive foreign species in China when necessary to avoid "good intentions and bad things."
04
If you find suspected invasive alien species in daily life, promptly report to the relevant departments so that these animals and plants can be properly handled.
Tiejianjun warm reminder
Many netizens are discussing on the Internet about "strange fish" can alligator gar be eaten?
Tiejianjun reminds: Don’t eat ! The internal organs and fish eggs of alligator gar are highly poisonous!
Source: Beijing Railway Inspection
