Residualism and residency: the same side of different coins cameron sharpe

RESIDUALISM AND RESIDENCY: THE SAME SIDE OF DIFFERENT COINS

• CAMERON SHARPE

• WDFW

• CONSERVATION BIOLOGY UNIT

• KALAMA RESEARCH TEAM

KALAMA WATERSHED

RESIDUAL

• A JUVENILE HATCHERY FISH OF SMOLT AGE THAT FAILS TO OUTMIGRATE WITH THE REST OF ITS COHORT

MIGRANTS & RESIDUALS (BY ’00 & BY ’99)

PERCEIVED RISKS:

• ECOLOGICAL: COMPETITION, PREDATION
• GENETIC: DOMESTICATION SELECTION, HW CROSSES, HYBRIDIZATION

RESIDENT

• A FISH THAT DOESN’T ADOPT ANADROMY

IDEALLY:

REALITY:

MECHANISMS

• MUTATIONS

• SCORING ERRORS

• UNSCREENED STEELHEAD

• RESIDENTS

• RESIDUALS

MECHANISMS

• MUTATIONS

• SCORING ERRORS

• UNSCREENED STEELHEAD

• RESIDENTS

• RESIDUALS

MECHANISMS

• MUTATIONS

• SCORING ERRORS

• UNSCREENED STEELHEAD

• RESIDENTS

• RESIDUALS

MECHANISMS

• MUTATIONS

• SCORING ERRORS

• UNSCREENED STEELHEAD

• RESIDENTS

• RESIDUALS

MECHANISMS

• MUTATIONS

• SCORING ERRORS

• UNSCREENED STEELHEAD

• RESIDENTS

• RESIDUALS

RESIDUALS

• NUMEROUS

• WELL-DISTRIBUTED

• PERSISTANT

• MOSTLY MALE

• MOSTLY MATURE OR MATURING

MECHANISMS

• SIZE/GROWTH

• SEXUAL MATURATION

• (NOT INDEPENDENT)

SEX RATIOS OF RESIDUALS

SEX RATIOS OF RESIDENT TROUT