question 2: why do fish farmers feed their fish with birth control pills? Who talks nonsense? A group of people who don't understand make rumors.
question 3: why do fish sellers feed fish with birth control pills? Contraceptive pills are developed and invented for human beings. The physiological structure, hormone secretion and reproductive process of fish are different from those of human beings. Eating human contraceptives will not have contraceptive effect. But some ingredients in the contraceptive pill (I don't know which ones) have a * * * effect on the growth of fish. Eating such fish should not be good for your health
Question 4: Why do fish take birth control pills? Because of hormones, fish only gain meat after eating.
Remember to adopt it.
Question 5: Nowadays, there are more and more fish farmers. I heard many people say that fish are fed with birth control pills. Is this really the case? I have inquired about the relevant information for you and compiled it as follows:
Focus on the safety on the tip of the tongue
? Answer
■ Life News reporter Feng Yaohua
Core Tips
Since 1998, the saying of "contraceptive fish farming" has spread all over the country, and more than ten years have passed, and many people in the folk still doubt it. Yesterday, during the National Food Safety Publicity Week in Guangxi, experts from Guangxi Aquatic Animal Husbandry and Veterinary Bureau once again clarified this food safety issue.
The rumor
"Birth control pills for fish farming"
has been around for 16 years
The most famous one about birth control pills for feeding big animals is the "birth control pill eel", which started in 1998 and lasted for a long time. After that, it gradually spread, and finally, aquatic products such as loach, tilapia, shrimp, crab and turtle were also affected.
There are two kinds of online sayings. One is to feed birth control pills when crabs lay eggs, so that the mother crabs will not lose weight and the crab seedlings will grow up more easily. Giving birth control pills to shrimps is to prevent them from laying eggs and promote their rapid growth. Another way of saying this is that feeding the Misgurnus anguillicaudatus and Monopterus albus with birth control pills and feeding the tilapia with birth control pills is for the purpose of male-female conversion, so that the female can grow faster and fatter and be listed as soon as possible.
Refusing rumors
Experts refute
Online claims
According to the person in charge of the quality and safety supervision department of aquatic animal husbandry products of Guangxi Aquatic Animal Husbandry and Veterinary Bureau, these online claims seem reasonable. In fact, after careful scrutiny, especially from the effect of farmers' pursuit of economic benefits, feeding birth control pills to these aquatic products not only fails to achieve their desired results, but is an act of "stealing chickens and eating rice at no cost", which is simply not worth the candle.
experts also refute these rumors about the use of contraceptives by loach, tilapia, shrimp, crab and turtle (the contraceptive was published yesterday).
God-like
Contraceptive pills
● Shrimp and crab contraceptives are not suitable for crustaceans at all
Crab crustaceans, and their development and metabolic systems are completely different from those of mammals and vertebrates, so human contraceptives are not suitable for crabs. Yang Weilong, president of Yangcheng Lake Hairy Crab Industry Association, once told the media: "Crabs are different from fish. Contraceptives and other similar drugs have side effects on crabs, which are not only not conducive to crab shelling. If farmers use them, they may cause crabs to die suddenly because of sudden growth." In addition, the essence of hairy crabs is actually crab roe and crab paste, and the gonads of hairy crabs taking birth control pills are not developed.
In addition, the shrimps we are selling in the market are far from reaching sexual maturity, so there is no need to use contraceptives for "birth control". The sexual maturity of prawns is 8-1 months, while the commercial prawns cultured generally only need 3-4 months from seedling to adult, which is far from their sexual maturity, so they have no reproductive ability at all and need no "birth control".
● Loach farmers are eager for female loaches to lay eggs
If a high-quality female loach breeds four times a year, it can achieve a profit of several hundred yuan. Some farmers said that if the loach is given birth control pills, it will be "childless", and there will be no benefits.
● The male rate of artificially bred tilapia is very high, and no medicine is needed
In many reports, it is mentioned that methyltestosterone (also known as methyltestosterone or methyltestosterone), a contraceptive, has been used in tilapia breeding. In fact, this substance, as its name implies, is not a contraceptive at all, but an androgen. Feeding the feed containing methyltestosterone at the fry stage can change the sex of female tilapia fry and improve the male rate of tilapia fry, which is beneficial to tilapia production and increase yield. This is a practice implemented in the industry in the past. However, methyltestosterone has been listed as a banned drug, and the male rate of tilapia fry obtained through variety breeding has reached 97% ~ 98%, so there is no need to use drugs to control the sex of tilapia. As a banned drug in aquaculture. Every year, hundreds of batches of samples of methyltestosterone residues in tilapia are sampled in Guangxi, and the total qualified rate in recent years is over 99%. According to public data, in 21, Guangxi exported nearly 6, tons of tilapia to Europe, America and South Korea, accounting for one-fifth of the total export of tilapia in China. Imagine how to pass the strict inspection of European and American countries if tilapia is fed with birth control pills.
● Birth control pills for soft-shelled turtles will increase the mortality rate
Some specialized scientific and technical personnel have done experiments, and the results show that although methyltestosterone can make soft-shelled turtles grow rapidly temporarily, it will increase the mortality rate of soft-shelled turtles, and the growth of soft-shelled turtles will slow down in the later period, and there is a risk of passing it on to the next generation. In summary, it is not worth the candle. ...> >
question 6: why does the uncle who keeps fish give the fish birth control pills? * * * Fish grow up
Question 7: Is there a contraceptive for fish? Anyone can use it. Haven't you seen the news before? The fish in the fish pond are prevented from over-breeding by splashing contraceptives in the fishing ground.
Question 8: Why do farmers feed contraceptives to fish and shrimp? In fact, the rumor about "pregnant medicine to raise shrimp" is not new now. I remember when I was a child, my family often reminded me that the shrimp head could not be eaten, because the greedy farmers used birth control pills to feed the shrimp, and most of the shrimp digests were stored in the head. In fact, there is no need for experts to refute rumors, just look up the information a little.