Table 9-2.  Life History Patterns of Anadromous Salmonids in the Nehalem River Drainage.
	Adult	Spawning	Eggs	Young	Freshwater	Young Migrate	Time in	Time in	Adult Weight
Species	Return	Location	in Gravel	in Stream	Habitat	Downstream	Estuary	Ocean	(Average)
WINTER	Nov - Jun	tributaries, streams	Feb- Jul	1-3 years	tributaries	Mar-Jun(2nd-5th yr)	less than	1-4 yrs	5-28 lbs.  (8)
STEELHEAD		and rivers					a month
COHO	Oct-Jan	coastal streams,	Oct-May	1+ years	tributaries,	Mar-Jul (2nd year)	few days	2 years	5-20 lbs.  (8)
		shallow tributaries			mainstem,
					slack water
CHUM	Sept-Jan	coastal rivers and	Sept-Mar	days-weeks	little time in	shortly after	4-14 days	2.5-3 years	8-12 lbs. (10)
		streams, lower			fresh water	leaving gravel
		reaches
CHINOOK		mainstem large			mainstem large		days-months	2-5 years
		and small rivers			and small rivers
--Summer	May-July		Sep-Nov	1+ years		spring (2nd year)			10-30 lbs. (14)
--Fall	Aug-Mar		Sep-Mar	3-7 months		Apr-Jun(2nd year)			10-40 lbs.
SEA-RUN	Jul-Dec	tiny tributaries of	Dec-Jul	1-3 years	tributaries	Mar-Jun	less than	0.5-1 year	0.5-4 lbs. (1)
CUTTHROAT		coastal streams		(2 is average)		(2nd -4th year)	a month
TROUT