THE ANTISMOLT WHEN BAD THINGS HAPPEN TO GOOD FISHES - PowerPoint PPT Presentation

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THE ANTISMOLT WHEN BAD THINGS HAPPEN TO GOOD FISHES

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A JUVENILE FISH OF SMOLT AGE THAT FAILS TO OUTMIGRATE WITH THE REST OF ITS COHORT ... THE ANTI-SMOLT: WRETCHED, UNCOOPERATIVE HALFWITS. GLASS HALF FULL ... – PowerPoint PPT presentation

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Title: THE ANTISMOLT WHEN BAD THINGS HAPPEN TO GOOD FISHES


1
THE ANTISMOLT- WHEN BAD THINGS HAPPEN TO GOOD
FISHES
  • CAMERON SHARPE
  • BRIAN BECKMAN
  • PATRICK HULETT
  • CHRIS WAGEMANN
  • CHRIS GLEIZES
  • HOWARD FUSS

2
1 JUVENILE
PROTRACTED FW RESIDENCY
ANADROMY
2 JUVENILE
NON- ANADROMY
3
RESIDUALS
  • A JUVENILE FISH OF SMOLT AGE THAT FAILS TO
    OUTMIGRATE WITH THE REST OF ITS COHORT

4
SMOLT
LG RESIDUAL
SM RESIDUAL
5
PERCEIVED RISKS
  • ECOLOGICAL COMPETITION, PREDATION
  • GENETIC DOMESTICATION SELECTION, HW CROSSES,
    HYBRIDIZATION

6
CASE STUDIES
  • SNOW CREEK
  • KALAMA
  • OTHERS…

7
SNOW CREEK
  • TIPPING ET AL. (1995). PFC. 57120-123
  • 3 RELEASES 91, 92 93 4.7 KM ABOVE WEIR
  • 20 MISSING, PRESUMED DEAD

8
KALAMA
  • GOBAR CREEK
  • MAJOR KALAMA SPAWNING TRIBUTARY
  • ACCLIMATION SITE FOR STEELHEAD RELEASES

9
KALAMA WATERSHED
10
GOBAR CREEK
UPPER REACH BY98 88 N1637 BY99 71 N2071 BY00
79 N656
LOWER REACH BY98 12 N229 BY99 29 N850 BY00
21 N175
11
MIGRANTS RESIDUALS (BY 00 BY 99)
MIGRANTS
FREQUENCY
RESIDUALS
FORK LENGTH (mm)
12
OTHER WORK
  • KEOGH. WARD AND SLANEY (1990). 40 LOSS.
  • YAKIMA (TEANAWAY). McMICHAEL (1992) 36 LOSS.
  • NEED EXAMPLES TO THE CONTRARY.

13
MECHANISMS
  • SIZE/GROWTH
  • SEXUAL MATURATION
  • (NOT INDEPENDENT)

14
SEX RATIOS OF RESIDUALS
15
SIZE AND SEXUAL MATURATION OF MALE RESIDUALS
a
16
IMMATURE MALES
MATURING MALES
PRECOCIOUS MALES
17
FL (mm)
18
(No Transcript)
19
(No Transcript)
20
BROOD AS 0
SMOLT COHORT (MULT. BROODS)
21
SMOLTS
RESIDUALS
22
PERSPECTIVES
  • GLASS HALF EMPTY
  • THE ANTI-SMOLT WRETCHED, UNCOOPERATIVE HALFWITS
  • GLASS HALF FULL
  • THE WILD CHILD NATURAL EXPRESSION OF PHENOTYPIC
    PLASTICITY OF THE SPECIES

23
ACKNOWLEDGEMENTS
  • KALAMA HATCHERY STAFF
  • NMFS/MITCHELL ACT
  • HSRG/IAC
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