Page 8 - Annual Report 2011

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Anadromous fish is the fish that return to their spawning rivers from the ocean at certain seasons
for breeding in fresh water. The following seven anadromous species are listed as species which
migrate into the NPAFC Convention Area.
ncorhynchus keta
English Name
Japanese Name
Korean Name
Russian Name
Chum salmon
Chum salmon are the second most abundant
species of Pacific salmon whose origin is in Asia
and North America. The fish spawn in different
types of streams and the fries migrate directly to
the sea soon after emergence. The immatures
distribute themselves widely over the North Pacific
Ocean, and the maturing adults return to the
home streams in summer or autumn at various
ages, usually from two through five years, and in
some cases up to seven years. They all die after
spawning. Individuals have been reported up to
108.8 cm in length and 20.8 kg in weight.
ncorhynchus kisutch
English Name
Japanese Name
Korean Name
Russian Name
Coho salmon
Coho salmon originate both in Asia and North
America. The majority of coho mature during
summer in their third year of life, having spent
about four to six months in incubation and up to
fifteen months rearing in fresh water followed by a
sixteen-month growing period in sea water. They
usually arrive at their rivers of origin during late
summer and autumn to spawn. The adults die
after spawning. The size of adult coho is variable
with lengths ranging from 40-88 cm and weights
from 1.2 - 6.8 kg.