54
.
THÈËBIOLOGY iOF' FISHES
has anypreference, comes from the deep water
to shallower banks. '
'
'.
-
_
_
Theséèroups, in which the migratory movements are
of little=acC0untt or in which different tendencies are shown
-
by dil£erent species, may be called neutral for the moment.
The prOb'ability‘ is, indeed, that they are not so much
_
affected by the spawning process. The sèeming migrations
maybe eithefa return to the natural home places, follOwing
upon the drift of the young away from these-, or they may be
mixed Up with the movements in search of food. TheCod,
'
example; is a rover With a circumpolar distribution like
_
the“'Herring, and it shoWs a decided preferencefor the latter
'
ItipurSues the latter at all
-y‘ear
andat the proper time it-'iS'able to spawnwherever1tgoes
_
———Withi certain limits, of course,; but théyareveryw1de “ '
_
and
closely'tô th0Se :of: the
-:
'
the
-_ standpoint these
groups
[are of great importante in
regarding the
Ï
*
take it, that the species
_totheir surroundingS
T’chat theyamoturgedtomake any great change
_
.
f upon;
VieWing their llf€— '
show a better balance betxv‘eèthë
inerÏandŸ outer=c0nditi6ns;
: __
:
_
'
Ÿ'Ï‘_T—he —seœnd exceptionis
Ï
Wlth ithe‘î Common Flounder : the Eelconst1tutçsthegld
groupofkatadmmwsshesthosewhlchmlgmæfromthe
-
0fSPawmngbut0therFlatsheshketlæSoles
'
'.
ThElmtb1ngtutdmwiâ…
.
:» —
thheStW“Id"'bÔÏ-dîîëult—‘Îito‘magneagreater
_.
.
contrast jWhilS't—other s—h‘èë :ai-è content With
Ï
,
the-limits
=