Page 73 - Engineering in Nature

Harun Yahya

D
C

B
A

The mechanism above was prepared to help understand the role of the sense of
scent in the journeys made by salmon. In the central pool meet four artificial water
currents. Of these, current A was given the scent of the tank in which the fish had
been placed just before. The other currents (B, C and D) contained different scents.
When the covers in the central section were opened, the fish moved against the cur-
rent containing the scent they had lived with before.

• Salmons' Determination
A discovery at the Prairie Creek Fish Breeding Farm in North
California revealed salmons' direction finding abilities in an incredi-
ble migratory adventure. 23
On December 2, 1964, a large, two year-old salmon was found in
one of the breeding pools swimming amongst the hundreds of young
fish. Examined close up, a Prairie Creek Fish Breeding Farm metal
clip was seen on its back fin. This shows that the fish was one of those
that had been released into the ocean two years before, after having
been reared at the farm. But how could the salmon have returned
from the ocean to enter the farm's closed fish breeding pool?

Adnan Oktar
71