MIGRATION OF FISHE8
’
,
55
nature, the Eel ranges between the mOst
'
‘on the globe,
to the
Atlantic.
It passes through tWo :,transformatiôs in the
.
_
course of its life, when it enters and
leaves fresih
water; other shes have only one .orgnone at…alh The fEel ,
takes some ten to fjoürteen years
three—
more
in sait water) to become mature, other sheseveryWhere only one to three.
'
"
:_ ,.
_
Other Eels, Conger, Muraena, etc., do not show such a
'
great contrast, so far as we yet know their li£e—hiStoi‘ieég ,
'_
AH seem to be katadr0mous shes, migi‘äting
shalloW to deeper water, but only
genus,enters
jresh water.
_
.
‘
_
From
years’ study of the conditions in Northern
,
CG ]oh. Petersencamcä to the
that
'
the Baltio and Western Europe migrate out _toÏ
,
,g_ÈthèjgÀtlâñtic to spaWn: Where they ,spawned
the
_
and varied have been the sp_eculationS_;
regarding the' solution of the
,
was.Somewhat_complicated by the conclusions of the Italian
,
fi workers, "“Grassi'and Calandruccio, that;the EelispàWedi——
*;
qeMôdîteiranean
They had found the young_f_ry and
'
,
eventhoughtthey had found the eggS
" the latter
,
It’Was notknownat
7
'
'
three
"
.
f :
'
Ï —î z:
‘:
Petersëf$ work Was taken;11bÿ ]ohSSChmldt Wlth
the Italian conclusions
*h1‘ihd;
111 f
”
fruitless ;search of
:çertainly
'
did
he-disçQŸeœd, and no young
could be found bebwrheÿ,fbtanutmany ?.
=
This= young formLeptœephalusbel@n£“°aweu
ç globe.îïa Aït—_ anearh€rP€1f1@dth€YW€ïe°®“Êläemdcils…Ct
“,”, spemesbymanyauthoruesandcertainlytheœlS—“0tm‘mh
'
1 resemblanœbetweemaLeptoœphalusadaeï(ë12)
_