Carbaryl, Carbofuran, and Methomyl - National Marine Fisheries ...

During the first status review on this population, adult escapement trends could be
computed on seven populations. Five of the seven populations exhibited declines while
two exhibited increases with a range of almost 6% annual decline to a 3.5% increase. At
the time little information was available on the actual contribution of hatchery fish to
natural spawning, and on present total run sizes for the DPS (Busby, Wainwright et al.
1996).
More recent time series data are from snorkel counts conducted on summer-run steelhead
in the Middle Fork Eel River. An estimate of lambda over the interval 1966 to 2002 was
made and a random-walk with drift model fitted using Bayesian assumptions. Good et al.
(2005) estimated lambda at 0.98 with a 95% confidence interval of 0.93 and 1.04. The
result is an overall downward trend in both the long- and short- term. Juvenile data were
also recently examined. Both upward and downward trends were apparent (Good,
Waples et al. 2005). The majority (74%) of BRT votes were for “likely to become
endangered,” with the remaining votes split equally between “in danger of extinction”
and “not warranted”.
Critical Habitat
Critical habitat was designated for NC steelhead on September 2, 2005 (70 FR 52488).
The critical habitat designation for this DPS identifies PCEs that include sites necessary
to support one or more life stages of steelhead. Specific sites include: (1) freshwater
spawning, (2) freshwater rearing, (3) freshwater migration, (4) estuarine areas free of
obstruction, (5) nearshore marine areas free of obstructions, and (6) offshore marine areas
with good water quality. The physical or biological features that characterize these sites
include water quality and quantity, natural cover, and adequate forage.
Puget Sound Steelhead
Distribution
Puget Sound steelhead occupy river basins of the Strait of Juan de Fuca, Puget Sound,
and Hood Canal, Washington. Included are river basins as far west as the Elwha River
and as far north as the Nooksack River (Figure 29). Puget Sound's fjord-like structure
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