Document ID: EPA-HQ-OW-2002-0049-1251
Agency: epa
Document Type: Supporting & Related Material
Title: 
Posted Date: 2004-03-10T05:00Z

Historical
records
of
abundance
of
special
status
fish
species
in
the
Bay­
Delta
region.
These
historical
records
were
used
to
estimate
current
abundance
and
to
estimate
population
restoration
targets
that
would
represent
restoration
of
abundance
for
each
species
to
pre­
decline
levels.
Current
abundance
and
restoration
targets
were
used
in
estimating
a
$/
fish
value
for
special
status
species
in
the
Bay­
Delta
region.
>=
40­
inch
green
sturgeon
Year
abundance
1954
198
1965­
71
1967
1,850
1968
1,037
1974
203
1975­
76
1979
1,906
1983­
84
1984
1,106
1985
847
1987
598
1990
739
1991
1993
451
1994
1997
1,118
Estimates
calculated
as
GST:
WST
proportion
times
the
mark­
recapture
WST
population
estimate.
Includes
fish
40
inches
and
above,
the
minimum
legal
size
limit
before
1990.