The information comes from Guangming.com, Phoenix.com, Kennedywildbirdfood.
The fish in Baotu Spring were fed to death by tourists?
Baotu Spring is one of the three major scenic spots in Jinan, is a national 5A-level tourist attraction, covering an area of about 158 acres, and there are many places of interest and historic sites around, such as Guanlan Pavilion, Li Qingzhao Memorial Hall, Li Kuchan Memorial Hall and so on. It is said that after Emperor Qianlong drank the tea boiled by Baotu Spring, he canonized Baotu Spring as "the first spring in the world".
Many ancient masters have also described Baotu Spring in documents and works.
Although it is very lively to talk about a bunch of names, it is estimated that more than half of the tourists who visit Baotu Spring now are for the carp of Baotu Spring. The carp here is so fat! It's really spherical, and it will be searched several times a year, and each time it's about fish being too fat.
It is true that looking at the appearance of these fish, it is really irresistible, after all, in the aesthetics of human beings, in addition to human beings themselves, other animals are cute as long as they are fat enough.
Recently, the carp of Baotu Spring has been on the hot search again, but this time it is for other reasons.
A few days ago, a video went viral on the Internet, showing a Baotu Spring security guard carrying a fish in his hand to show the onlookers and begging the tourists to stop feeding the carp, they have eaten so much that several of them have died! After saying it several times in a row, he also changed to another fish to show it, as if to confirm what he said.
This video has attracted attention, and it has stimulated the desire of tourists to explore, and the tourists of Baotu Spring have risen instead of falling in the past few days, but whether the tourists are really convergent, we don't know.
Some of the discussions about the incident in the comment section are worth talking about, mainly the two pictured below, which are common stereotypes about some fish for many years.
So are these impressions real?
Fish don't feel full?
In their natural habitat, most fish do not face the problem of eating more than they are physiologically capable of, after all, the reality of fish living in rivers, streams, lakes and oceans is that their nutrition is affected by the availability of food, and sometimes food is difficult to obtain.
Some carnivores are biologically innate to hunt and eat as much as they can because nature has given them that. Sharks will eat until they are full, but they will sometimes spit out food to make more room to eat.
However, in human-reared environments, many species have never lived in the wild at all, and food is readily available, so many species are unable to adequately process the behaviors associated with their anatomy. Needless to say, all fish, with the exception of apex predators such as sharks, rest after they are full, but the problem is that if human-bred fish see food entering the tank on time, the time they don't eat may become shorter, prompting them to habitually overeat.
This means that they will eat more than their counterparts in the wild, and it also gives humans the impression that these fish are stupid and don't know if they have eaten enough.
In fact, fish can know whether they are full or not, but as mentioned above, fish in captivity have become accustomed to overeating, so as long as there is food, they will eat hard, although they will not eat to death, but often eat health problems, such a situation is common in carp, grass carp, goldfish and other species, the reason is that these fish are stomachless fish!
What does stomachless fish mean? The digestive system of fish is very primitive, and gastric fish really do not have the organ of "stomach", and the front, middle and back parts of their intestines have digestive enzymes that can digest food, but the ability is definitely not to be put in the stomach to digest thoroughly. Therefore, stomach fish often eat all the time, and then the food passes through the intestines to squeeze out the feces, and it looks like they are excreting while eating food, and they are very greedy. There is a limit to the amount of food they can eat, but it certainly looks like they can eat more than gastric fish, after all, the size of the stomach of a gastric fish limits the amount of food they can eat.
Those fish that don't seem to have enough to eat, their feces are all elongated, which comes out of the intestines, so the shape is like that.
After all, fish with stomach have stomachs, so they will make good use of their stomachs to make themselves feel "full" more intuitively, and they will be very restrained when eating.
In summary, stomachless fish such as carp also feel full, but they are not as sensitive as gastric fish. In addition, in captivity, they have developed the habit of overeating.
Someone is about to ask: Could it be that the fish ate the food, forgot it after 7 seconds, and then thought it didn't eat and continued to eat?
This classic rumor has actually been debunked for a long time. As early as the 60s of the last century, researchers have studied the memory ability of goldfish, and they found that goldfish can remember the light area of the fish tank for up to a month. In addition, zebrafish can identify when it is time to eat based on the color of the signal light and guide them through the maze.
One of the most intuitive proofs of this is that when the captive-bred fish see humans approaching, they will gather to beg for food, which is that they remember that humans can feed them. If they memorized for 7 seconds, they wouldn't have this pattern of behavior at all.
The cause of death
Since it wasn't because they ate too much and died, how did those fish in Baotu Spring die?
In fact, it does have a lot to do with the excessive feeding of tourists!
The amount of fish food fed is too much, the fish can't eat it at all, and the fish food will accumulate in the pond, and the decomposition of these foods will release various nutrients, resulting in a large number of algae blooms, and the algae will consume a lot of oxygen in the water, resulting in a lack of oxygen in the water, and the density of fish in Baotu Spring is very high, which makes the lack of oxygen more serious.
As we said earlier, a stomachless fish like carp pulls after eating, and the more you eat, the more you pull, and it becomes a "bowel machine". Overfeeding leads to an excess of their excrement, which accumulates at the bottom of the pool and organic sticky matter accumulates, which promotes the growth of harmful bacteria. Bacteria that multiply in large numbers naturally cause stress to fish and cause health problems.
Excessive fish food can also increase ammonia and nitrite levels in the water, which are harmful to fish, can make fish nervous, affect their gills, and make them more susceptible to disease; Eating too much can also cause fatty liver in fish, which can impair liver function and lead to fish death.
So while the fish are not satiety, their death is related to overfeeding by tourists. It is hoped that the attitude of tourists towards these fish is also "can be seen from a distance and can not be blasphemed", of course, this is also inseparable from the guidance and management of the scenic spot, less fish food windows and small traders, and prohibit tourists from bringing their own fish food, this situation can be alleviated a lot.