it
Two elegant figure-eight beards
Eyes smaller than nostrils "full of Buddha"
▲Round-mouthed copper fish
It is a national second-level protected animal
and the "giant panda in the water" Chinese sturgeon
He is also a member of the family tree of rare and endemic fish in the Yangtze River
It is a round-mouthed copper fish
"Race walkers" in fish
Every turn of spring and summer
The water temperature rises
The fish eggs begin the rafting trip
200 km away when it hatches[1]
To go home
Juveniles migrate all the way
Constantly crossing the deep pool of stone pillars
And overfishing
This makes the uneven "way home" even more bumpy
In 2015
Round-mouthed copper fish quilt
China Biodiversity Red List
Assessed as critically endangered
Species conservation and resource restoration are urgent
How does the "journey of life" of the fish continue?
The Three Gorges Group has carried out its own activities
Round-mouthed copper fish outside the artificial breeding study
Also delegated
Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences
Yichang Sanjiang Fishery Company and other institutions
Build a piece
Spanning more than ten years and extending hundreds of kilometers
Artificial protection area
The starting point is difficult
Changing water temperature and flow rate
It cannot be simulated by conventional farming environments
How to make the fish live "at ease"?
Researchers are stationed in the laboratory
Look for domestication factors such as dimming, feeding, and flow rate
It took years to build
Model of fully enclosed circulating aquaculture system[2]
Not only can it be "imitated"
Water temperature and flow rate under natural conditions
Water quality indicators can also be automatically monitored
Protect the healthy growth of fish
Researchers
Also carefully screened for them "roommates"
By mixing in different proportions of other fish
Form food complementarity and behavioral interaction
Fish community structure
A few papers tell you
To study the life habits of the round-mouthed copperfish
How much researchers are
Product (nao) pole (dong) nu (da) force (kai) ~
How long do small fish swim and get tired? [3]
Do young fish need to be "poor" to raise? [4]
This hand-drawn level, just ask you whether you are satisfied? [5]
More than a decade-long effort
Finally in exchange for a breakthrough miracle
Round-mouthed copper fish
The artificial domestication rate of broodstock has reached more than 85%.
In 2014
The China Sturgeon Research Institute of the Three Gorges Group realizes round-mouth copper fish
Artificial breeding "breakthrough of zero"
Key reproductive indicators such as induction rate and spawning volume have increased year by year
In 2020
The large-scale breeding technology of round-mouth copper fish has achieved results
Artificially reared mature broodstock
More than 150,000 fry are bred
It is a large-scale stocking of round-mouthed copper fish
Provide technical support
September 10, 2021
In the river section of Chishui City, Guizhou Province
166,900 round-mouthed copper fish "team up"
This is also the current Three Gorges Group
The largest number of round-mouthed copperfish seed was released
▲Experts participating in the stocking activities are stocking fish on the spot. In 2021, 166,900 round-mouth copper fish fry were released, a new high. Photo: Peng Zongwei
Round-mouthed copperfish seed for stocking
Marked according to a certain proportion
Carry out the entire life cycle of the round-mouthed copperfish
Population migration observation experiments
▲Fluorescent label of round-mouthed copper fish Courtesy of the Yangtze River Fisheries Research Institute of the Chinese Academy of Fishery Sciences
On this basis
Through habitat restoration and comprehensive treatment of water environment
As well as measures such as perennial bans on fishing
It is expected to be in the wild
Complete growth, development, maturation
As well as the process of a complete life history such as reproduction
Very heartwarming, isn't there?
In fact, this is just the story of "Three Gorges Fish Protection"
A microcosm
From the RedWater River to the Blackwater River
From the Yangtze River to the Jinsha River
From China to Laos to Brazil
In the relay of the fish guards
More than a dozen species and millions of rare fish have returned to the river
One after another
A wonderful journey in life
Jiang Bo is vast
A tail of rare fish carries a mark
With the public's expectations
Swim off into the distance
see
They swing their fins
The look of paddling hard
Is it a tenacity that strives to perpetuate the race?
bibliography:
Tang Huiyuan, Yang Zhi, Gao Shaobo, et al. Status of early resources of round-mouth copperfish in the middle reaches of Jinsha River[j]. Sichuan Zoology, 2012(03):86-91+95.
Zhu Tingbing, Wu Xingbing, Zhu Yongyong, et al. Comparison of effects of closed circulating water system and hull cage for domestication of juvenile copperfish with round mouth[j]. Freshwater Fisheries, 2015, v.45; no.320(06):97-101.
Tu Zhiying,Li Liping,Yuan Xi,Wang Congfeng,Huang Yingping. Sustainable swimming ability and activity metabolism of juvenile copperfish[j]. Freshwater Fisheries, 2016, 46(001):33-38.
Qu H T, Liu Yong, Hu M H, et al. Effects of hunger on the early development of round-mouthed copper fish coreius guichenoti[j]. Journal of Fisheries, 2017, 030(006):24-29.
Yu Zhitang, Liang Zhishen, Yi Beru. Early development of copper fish and round-mouthed copper fish[j]. Chinese Journal of Hydrobiology, 1984, 008(004):371-388.