Supplementation Studies

in Idaho Rivers

Clear Creek and Pete King Creek(89-098-01)

Jill OlsonUSFWS

ISS Study Area(31 streams total)

Clearwater Subbasin

Salmon Subbasin

Pete KingCreek (T)

JohnsonCreek (C)

LakeCreek

(C)

LoloCreek

(T)

EldoradoCreek (C)

ClearwaterRiver

Crooked ForkCreek (C)

SquawCreek (T)

PapooseCreek (T)

Colt KilledCreek (C)

SlateCreek

(T)

AmericanRiver (T)

NewsomeCreek (C)

ClearCreek (T)

South ForkClearwater River

Red River(T)

South ForkSalmon River

(T)

SnakeRiver

SeseshRiver

(C)

East ForkSalmon River

(T)

MarshCreek

(C)

BearValley

Creek (C)

UpperSalmonRiver (T)

HerdCreek

(C)ValleyCreek

(C)

West ForkYankee

Creek (T)

North ForkSalmon

River (C)

White CapCreek (C)

SalmonRiver

Salmon River Basin

Clearwater River Basin

LemhiRiver (T)

PahsimeroiRiver (T)

JohnsCreek

CrookedRiver (T)

Big FlatCreek (C)

Brushy ForkCreek (C)

CamasCreek

AlturasLakeCreek

BearCreek (C)

Study Area

Research Question #5

Is there an advantage to developing new Is there an advantage to developing new localized brood stocks with a known natural localized brood stocks with a known natural component for supplementing existing component for supplementing existing natural populations. natural populations.

2000 Fish & Wildlife2000 Fish & Wildlife

Program Program

Implementation: Developing a localized brood stock

Kooskia National Kooskia National Fish Hatchery is Fish Hatchery is one of the 7 one of the 7 locations used in locations used in the development of the development of localized brood localized brood stock for ISS.stock for ISS.

First generation brood stock (1993-1996)

In 1993 adult In 1993 adult spring chinook spring chinook salmon were salmon were collected from collected from Kooskia NFH.Kooskia NFH.

First generation brood stock

Parr were given a Parr were given a pelvic fin clip so we pelvic fin clip so we could distinguish could distinguish the supplementation the supplementation outplants from outplants from general hatchery general hatchery production.production.

First generation brood stock

In 1995 smolts with In 1995 smolts with pelvic fin clips were pelvic fin clips were released into Clear released into Clear Creek.Creek.

Supplementation with Supplementation with existing hatchery existing hatchery brood stock ended in brood stock ended in 1997.1997.

Second generation brood stock (1997-2002)

In 1997 adults from In 1997 adults from the localized brood the localized brood stock began to return stock began to return (BY’93).(BY’93).

Second generation brood stock

60-70% of the natural 60-70% of the natural adults are released adults are released above the weir.above the weir.

An equal number of An equal number of

supplementation adults supplementation adults are released above weir.are released above weir.

Second generation brood stock

(30-40%) Natural (30-40%) Natural and some and some supplementation supplementation adults are taken for adults are taken for brood stock.brood stock.

Second generation brood stock

Natural adults are Natural adults are spawned with other spawned with other natural adults or natural adults or supplementation supplementation adults.adults.

Crosses are Crosses are recorded.recorded.

Second generation brood stock

Eggs are reared to Eggs are reared to eye-up and eye-up and transferred back to transferred back to KNFH.KNFH.

Second generation brood stock

We began releasing We began releasing marked supplementation marked supplementation smolts from the smolts from the localized brood stock in localized brood stock in 1999 (BY’97).1999 (BY’97).

ISS Adult Returns to Clear Creek (Return Year 1996-2001)

0

50

100

150

200

250

300N

o. o

f Ret

urns

1996

1997

1998

1999

2000

2001

*Return Year

SupplementNatural