62
.
_
THEEBIOLOGY‘ OF FI“SHES
line ;system_to sîight variations in the strength of currents,
_
may enable the S'älmcn to detect the entrance of a river o‘r
,
'
gBut on the whole,o£1e may doubt whether the
_
senses play1uehpart» in the directing Tof the spawning
migrations.
,
,
.
_
THEEBIOLOGY‘ OF FI“SHES
line ;system_to sîight variations in the strength of currents,
_
may enable the S'älmcn to detect the entrance of a river o‘r
,
'
gBut on the whole,o£1e may doubt whether the
_
senses play1uehpart» in the directing Tof the spawning
migrations.
,
,