Someone told me;
The fish's memory is only seven seconds,
After seven seconds it will not remember what it once was;
Everything will turn into a fresh start.
So, it's in that little fish tank on that side,
It will never get bored;
Yes, that's it,
In this regard, the fish said: I am also very helpless
In fact, your fish not only remembers far more than 7 seconds, but also can make sounds and communicate, which is much more powerful than you think!
Today, I would like to introduce you to the sound mechanism of fish, which is a key to help scientists open the door to studying animals and the ecosystems in which they live. A new paper by australian and European scientists suggests that the sounds of these fish, and even those in the environment in which fish live, can be used for the detection and protection of freshwater environments.
In most parts of the world, the sun rises every morning, accompanied by birds and insects.
When we move the camera underwater, there is also a voice that is making a secret communication, muttering. Simon Linke, a scientist at Griffith University's Australian River Research Institute, says about 20 percent of fish can make sounds and communicate.
The sound of fish
Aristotle was the first to record information about the sounds of fish, in his Zoology 2,000 years ago.
Fish do not have vocal cords, and the reason why it can make sounds is that it uses other tissue structures of the body. Fish found so far have two different ways of sounding
The first: The muscles connected to the swim bladder rapidly stretch and contract, causing the swim bladder to vibrate and make sounds. Similar to the shrill sound we make when we scrape a balloon with our palms.
Second: vocalization by rubbing tissue, the sound may be made by the friction of the chest strap or the friction of the pectoral fin to the chest belt.
North American fishing enthusiast species, the twill totoaba is well known for its difficulty in catching. But underwater, the twill canine totoaba emits a low, grunting sound. (Nan Xiao crazy is upset that only one audio can be uploaded, and some fish sounds very interesting)
And in Seattle, every few years or so in September, in the western part of the city, a whining sound is heard at night, first rising, then lowering and disappearing, and then coming back after a while. It makes people dream in the middle of the night and wake up the surrounding residents. Later, scientists finally knew why, it turned out to be male flatfin American toads courting at night and singing to the moon.
Bioacoustics
Although the field of bioacoustics has not been around for long, scientists have already collected a large amount of data through tape recorders.
In the ocean, tape recorders placed on buoys help scientists better understand communication between humpback whales and track the distribution of right whales in the North Pacific.
On land, tape recorders help us record the communication of African elephants on the continent that we humans can't hear. *(Elephants make sounds that are partially lower than the hearing range that humans can hear.) ）
These sounds help scientists study how city lights affect migrating songbirds and how road noise hinders the communication of amphibian frogs.
Unlock new roles in freshwater bioacoustics
For now, while most bioacoustic research focuses on oceans and land, Linke and his colleagues feel that bioacoustics can also be well used in environmental management and environmental protection in freshwater environments.
Species Conservation: The freshwater seabream, widely distributed in Australia's freshwater environment, makes sounds when it wants to warn its other fish or when it is courting and spawning. "Because the freshwater seabream is a common fishing species for fishing enthusiasts, and in Australian Aboriginal culture, it has its special land. Knowing the sound of freshwater seabream can help with better conservation. Linke said. Controlling species invasions: for example, by detecting the sound of tilapia in Australian water bodies, to judge whether the extinguishing effect of tilapia is obvious.
After posting this article, many players should ask, will the fish in my house make a sound?
In fact, our common ornamental fish are small in size, and the sound emitted is not as innate as that of large fish, and it is likely that the sound of the water flow in the fish tank is covered without us noticing.
To tell the truth, if you hear the sound of fish in the wild, it may be attributed to some noises of the environment, and it is worth learning from this scientist who can perceive from the details and apply it to reality