WATER TEMPERATURE AND
THERMOCLINES
Water
temperature
has an
important-if
not
controlling-influence
upon
the activities of
all fish. Fish are cold blooded and their
bodies are
always
the
temperature
of
the
surrounding
water.
During
the
winter,
colder water slows
down their metabolism. At this
time,
they
need
about a fourth as
much food as
they
consume in the summer.
Most fish don't
spawn
unless the water
temperature
is within rather
narrow limits. The surface
temperature
meter built into the Fish l.D.
Plus
helps identify
the desired
surface water
spawning temperatures
for
various
species.
Trout
can't survive in streams that
get
too warm.
Bass and other fish
eventually
die
out when stocked in lakes that remain
too cold
during
the summer.
While some fish have a wider
temperature
tolerance than
others,
each has a certain
range
within which it tries to
1MODE
[1&i]111j
The Fish l.D. has five different
"screens" or modes of
op-
eration. The Fish 1.0. Plus
has seven. Use this
key
to
switch between modes.
1
FISH l.D.
•
J
This
key
turns the Fish l.D. feature off and on.
ii 1
FISH
ALARM
•
A
Press both
the Fish 1.0. and the AUTO
key
at
I
II
the
same time to activate the Fish Alarm. This
is
an audible fish
alarm.
1AUTO
A
J
Turning
the
unit on enables the automatic mode. To
switch
to the
manual
mode,
press
the AUTO
key.
You
can return
the unit to
automatic at
any
time
by pressing
the AUTO
key
again.
6
23
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