280
”
THE SEAS
’
The herring sheries lie all round the coasts of the
“British Jsles, and the chief time for catching the sh is
when they are approaching the coasts in dense shoals to
,
Spawn.
Time of spawning is probably to a large extent
'
determined by the temperature of the surrounding water
and there are great differences in the dates of the spawing
periods from place to place.
The great drift-shery starts
-
on the west coast of Scotland at Stomoway in the Hebrides
in May; in June the herring are being caught off the
'
Orkneys and Shetlands after which they begin to appear
successiVely at different localities down the Scottish coast,
until by the middle of july the shery opens at Shields.
By the end of july, Scarborough and Grimsby are the -
chief centres of the herring industry, and early in October
the shermen are hard at work at Yarmouth and Lowestoft,
the two leading herring ports.
The boats from many ports
—
follow this herring shery round the coast, many Lowestoft
boats for instance ending the herring Season shing from'
Plymouth, 'where‘the herring are spawnihg throughout the
winter.un‘til January. There is also a herring shery of
appreciable value*situated in western waters between the
English and Irish Coasts.
'
'
‘The apparent advance of the herring
along '
our east coasts gaverise
the idea that it was actually
’a migration of the herring themselves ; that in the spring
they collected in great armies in the Arctic Ocean and from
there worked their way down our coasts.
Thus, Mr.
Pennant in his “ British Zoology
”
in 1812 remarks, “ The
great winter réndezvous of the herring is Within the Arctic
circle:
there they continue many months in
to
recruit themselves after the fatigue of spawning, the seas
within
that space swarming with insect food in a far greater
.
'
degree than in our warmer latitudes.
,
.
“
This mighty army begins to put itself in
in the
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