3.34
,_
THE
‘or four years’ time there would be a very ourishing
shery. . The prophecy was fully borne out.
It is clear
_
that such prediction must prove of value to the shing
industry as _it will obviate an unnecessary glut on the market
in the event
of a coming good year, or direct attention to
some more protable sh before the lean year comes.
_
'
After making detailed observations of the temperature
'
and saltness of the waters of the Danish coasts throughout
period of many years, the Danish Fishery_ investigatorS
have discovered that there is a connection between the
hydrographical conditions of the water and the mackerel
shery.
As soon as the observations of the saltness of the
water are known for March and April it becomes possible
'
to predict whether the mackerel shery taking place two
'
months ahead will be good or bad.
The presence of
'
mackerël in this case is probably determined by the“
strengthof
certain currehts owing into the Baltic. ,
-
,
It is unlikely that, as yet, such_a method will be possible
'
'
in such waters as those
English Channel. Conditions
,
in the Danish waters are somewhat special owing to the
admixture of fresh water from the BaltiC Sea and salter
water from the
_
North Sea; Differences in the hydro—
graphical conditions of the various water» layers
are
there much more marked than we should expect to nd”
in more open Water such as the English Channel, where
connections between these Conditions and the movements
'
of'shes are harder to nd.
rms is not to say that they
may not be found some_day when our Observations are more
'
complete
and the methods of making them more perfected.
'
Now a sherman is… essentially a gatherer of a harvest
he has not sown.
He goes out and catches sh from the
sea
but does nothing to increase the supply contained
therein_.
What __has happ6ned in other cases where man 1138
hunted without thought for the future ?' Whole seal popuh'
,_
THE
‘or four years’ time there would be a very ourishing
shery. . The prophecy was fully borne out.
It is clear
_
that such prediction must prove of value to the shing
industry as _it will obviate an unnecessary glut on the market
in the event
of a coming good year, or direct attention to
some more protable sh before the lean year comes.
_
'
After making detailed observations of the temperature
'
and saltness of the waters of the Danish coasts throughout
period of many years, the Danish Fishery_ investigatorS
have discovered that there is a connection between the
hydrographical conditions of the water and the mackerel
shery.
As soon as the observations of the saltness of the
water are known for March and April it becomes possible
'
to predict whether the mackerel shery taking place two
'
months ahead will be good or bad.
The presence of
'
mackerël in this case is probably determined by the“
strengthof
certain currehts owing into the Baltic. ,
-
,
It is unlikely that, as yet, such_a method will be possible
'
'
in such waters as those
English Channel. Conditions
,
in the Danish waters are somewhat special owing to the
admixture of fresh water from the BaltiC Sea and salter
water from the
_
North Sea; Differences in the hydro—
graphical conditions of the various water» layers
are
there much more marked than we should expect to nd”
in more open Water such as the English Channel, where
connections between these Conditions and the movements
'
of'shes are harder to nd.
rms is not to say that they
may not be found some_day when our Observations are more
'
complete
and the methods of making them more perfected.
'
Now a sherman is… essentially a gatherer of a harvest
he has not sown.
He goes out and catches sh from the
sea
but does nothing to increase the supply contained
therein_.
What __has happ6ned in other cases where man 1138
hunted without thought for the future ?' Whole seal popuh'