4211

• UCREFRP Catalog Number: 4211
• Author: Ulmer, L.
• Title: Management Plan for the Razorback Sucker ‎(
• USFW Year: 1985.
• Copyright Material: NO

.~1~.
t ~
(~
adults (95o ec~nf~_dence li_rnits? in ,~.~agust 180. G~.ltha~ur~h larval
~~_
razorbacks were co1_lect£:.~d over a three--yti.ar ~ ariod (lg~~-~3) , nt5
young were taken in subsequent ,sampling efforts. Tn~~re appears t:o
be no recruitment beyond t?re lsrrva:i stage.
Since 1980, management efforts nave focused on propagation
and r.ea.~ing of razorback under various envir.anmental conditions.
Senator U~ash razorbacks were spawned, the eggs incubated, hatched
and yaur~g reared at the Blythe OfLice of_ CDc~G using aquaria and
tanks purchased through Environmental Drotect:ion Program funds. A
portion of the resulting fing~r_lings 4~aase stocked to assess
survival in the Blythe Golf Course pond a,nd into. Taest T?orAd. Data
from these sites, and .front similar.experiments at Dexter NEH,
demonstrated excellent growth and loca mortality. Rearing pcnds
~~
have bean constructed at the CD~'G Imperial Valley War;n~.vater_
Hatchery- at i~iland and vain be used to rear razar_bac'rt suckers to
~~-- an apprc~ri_ate stocking sire for the California reintraduction
program.