Thousands of fish in Dongting Lake jumped out of the water en masse, and experts: the sound of motorized boats stimulated them

Jimu news reporter Zhou Hao

Video clip Xuan Yiyao

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In the past two days, the scene of thousands of fish jumping on Dongting Lake has attracted the attention of netizens. In the video, the fish in the lake jump and fall one after another, and the scene is spectacular. Some experts have pointed out that jumping fish are more sensitive to sound stimuli, and this scene has appeared in the case of a significant effect of fishing ban.

In the video, at the back of the boat, a large number of fish jumped out of the lake of Dongting Lake and fell into the lake, one after another, and the fish jumped on the boat board, the scene is very spectacular.

Mr. He, a volunteer of the Dongdongting Ecological Protection Association in Yueyang City, Hunan Province, told Jimu News that the video was filmed by him in the process of patrolling the lake on the afternoon of January 19, although he had participated in many lake patrols and seen fish leaps, but such a scene was also the first time he saw it, and he was very excited when he saw it, and recorded one of the sections. According to Mr. Ho's visual assessment, thousands of fish jumped out of the lake. Mr. He said that the occurrence of this scene may be related to many factors such as the large number of fish after the fishing ban.

Liu Huanzhang, a researcher at the Institute of Hydrobiology of the Chinese Academy of Sciences, pointed out that silver carp and bighead carp mainly live in the upper layer of the water, are more sensitive to sound stimulation, and when they encounter sound stimulation or vibration, it is easy to jump up, especially in the case of more fish. After the ban on fishing, the number of fish in Dongting Lake is indeed much higher than before, and when motorized boats sail by, under the stimulation of mechanical sounds, it will cause fish to jump around.

Liu Huanzhang said that the situation that the movement of the aircraft and ships caused silver carp to jump is common in North American water bodies. Due to the introduction of silver carp, but no one preys on it, the amount of resources is large, flooding in rivers and lakes, and becoming a problem that needs to be treated. On the mainland, these fish are an important food, so there is no such problem.

Liu Huanzhang believes that the emergence of such a scene means that fish resources are recovering under natural conditions, and the ban on fishing has obvious effects.

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