of an eel
Young eels grow up in fresh water; but when they become
'adults', they will leave their home in the river or lake
and go to the sea. They spawn under 400 ~ 500 metres deep.
After spawning, they will die of tiredness and high water
ovum incubates to leptocephalus which, will be brought
to river mouth again by black tide. Now they are called
'glass eels' because they are transparent. Anguilla japonica
and Anguilla rostrata will take one year to return to
river mouth, and Anguilla anguilla will take three years
to do this. The reasons of why and how these eel-fry return
to river mouth is still a mystery, maybe only God knows.
fields of Anguilla anguilla,
and Anguilla japonica
reaching river mouth, eel-fry will hide in the mud and
wait for the river temperature rising until it becomes
similar to the temperature of coastal water in order to
return to the river. The best catching time comes.
CATCHING TIME AND SIZES
of every November to next March; about 5,500~7,800/kg
of every November to next May; about 5,800~8,800/kg
of every December to next May; about 6,000~8,500/kg
of every February to May; about 6,800~9,000/kg
of every March to June; about 6,800~9,500/kg
of every November to next March; about 2,800~3,800/kg
of every November to next March; about 2,800~4,000/kg
of every January to April; about 2,500~3,500/kg
of every February to May; about 2,600~3,300/kg
of every January to May; about 4,500~5,800/kg
of every March to June; about 5,500~7,000/kg
entering fresh water, eel-fry become blacker and blacker
because pigment inside their body accumulates. They are
so strong at this moment that they even can go against
the stream in Niagara Fall. Finally, they arrive at a
lake, and become mature eels. They will come to the sea
when another spawning time begins.
Japanese began to breed eels from 1879 because wild eels
cannot meet the market demands. However, along with less
and less output and higher and higher prices, many countries
try to reproduce eels artificially.
As early as 1934, Boueher of France did some experiments.
After him, scholars of Japan, Taiwan and Mainland China
continued in doing this. But until now all of these efforts
have not succeeded. The artificially incubated Larval
eels cannot live for more than 20 days. Following the
pace of present development in biological technology,
it is assumed that we will succeed in the future.
by Wai Kee Industrial Co