Humpback Chub Ge

Management Pla

Wade Wilson

Dexter NFH&TC
Outline

9History of GMP9Overview of Policy Regarding 

Propagation of Species Listed Endangered Species Act 

9 Genetic Risks9 HBC GMP recommendations to 

these risks
History of Genetics Managem

9 Originated as part of HBC Compre

Management Plan

9 AMWG passed revised motion in 

“To use $50,000 in funds reprograCPI to support a HBC Genetics Pla refugia plan and additional samp

9 Draft reviewed by HBC Comprehe

Management Plan ADHOC in 200comments incorporated: “Recomhave externally reviewed”
History of Genetics Managem

9 GCMRC facilitated external review 

draft reviewed by 2 genetic experthatchery expert and comments weincorporated

9 USFWS Region II Regional Office 

2010, cleared for external release

9 Final provided to BOR in Novemb
Policy 

9 Policy Regarding Controlled Propa

Species Listed Under the EndangSpecies Act (CPP)

9 Fish and Wildlife Service9 National Marine Fisheries Service

9 Federal Register 

9 Vol. 65 No. 183, September 20, 200

9 Pacific salmon are exempted from 
Risks That Must Evaluate

9Broodstock Mining9Inbreeding9Introgression9Loss of Population Structure9Domestication Selection
Risk: Broodstock Mining

9Removal of natural parental (a

stock that may result in an incof:

9 extinction by reducing the abu

wild individuals

9 reducing genetic variability with

occurring populations
HBC - Recommendations

9 Collect young-of-year 

9 two assurance populations -

9 200 YOY/alternate years for 5 years = 1

assurance population

9 translocations

9 200 YOY per event

9 Probability of their survival would 

low

9 Does not recommend moving adu
Risk: Inbreeding

9The potential for an increased 

inbreeding or other adverse geffects within populations that in the enhancement of only a the gene pool.
HBC - Recommendations

9Maintain pedigree record infor

9 studbook keeper - designate p

spawning pairs
Risk: Hybridization/Outbre

9Genetic introgression, which m

diminish local adaptation of thoccurring population.
HBC - Recommendations

9Lower basin - lacks population

division

9 can move around without harm

9Lower basin different from Up

9 do not mix the two

9Move YOY
Risk: Domestication Selec

9Exposure to novel selection re

controlled environments that mdiminish a listed species’ natucapacity to survive and reprodwild.
HBC - Recommendations

9Maintain captive stock in outd

not in raceway culture

9NATURES rearing
Risk: Loss of Population S

9Potential erosion of genetic di

between populations as a resstock transfers or supplement
HBC - Recommendations

9Lower basin - lacks population

division

9 can move around

9Lower basin different from Up

9 do not mix the two
Other Risks (not in policy)

9Founder Effect9Genetic Drift9Augmentation/Ryman-Laikre 
Risk: Founder Effect

9Occurs when new population 

with few individuals

9 lower genetic diversity than sou

population
HBC - Recommendations

9200 YOY per event

9 translocation9 collection for assurance popula

9PIT tagged and genotype all i

9 compare diversity to source po
Risk: Genetic Drift

9Genetic changes in a populati

associated with chance event

9 few individuals contribute gene

generation by chance

9 loss of population diversity due 

typically associated with small size 


Genetic Drift - Potential R

9Loss of alleles or reduction in 

diversity

9Increase in genetic distance f

population/stock

9Fixation of deleterious mutatio
HBC - Recommendations

9 Monitor genetic variability

9 captive stock9 wild populations

9 ongoing population monitoring - 30 indi

for duration of the management activity

9 especially translocation localities

9 Spawn greater than 10 pairs

9 not in plan but general rule (Echelle

9 minimum 25 pair9 50 - 100 pair for recovery9 100 pair for new broodstock
HBC - Recommendations

9Maintain large population size

9 greater than 500

9Effective Population Size - no

individuals (census size) breeyear

9 fraction that do = effective popu

and on average is 14%
HBC - Recommendations

9Recover plan (2,100 individua

9 Ne = 294

9Assurance Population A (1,00

9 Ne = 140

9Assurance Population B (1,00

9 Ne = 140
HBC - Recommendations

9 Total (captive and assurance)

9 4,100 individuals9 Ne = 574

9 Close to theoretical 5,000 individu

to maintain genetic diversity over period

9 Minimum theoretical number is 50

calls for 2,100
Risk: Augmentation/Ryma

Effect

9Impact of the genetics of a wil

population as a result of augm

9 swamping of wild genetic diver

9 low genetic diversity but large nu

propagated individuals
HBC - Recommendations

9Equalize family sizes

9 no more than 5,000 from any o

should be stocked
Thank You

9Wade Wilson9wade_wilson@fws.gov9Dexter National Fish Hatchery 

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