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

Preliminary spawner survey data for 2007 (the average peak number of spawners per
mile observed during random coho spawning surveys in 41 streams) suggest that the
2007-2008 return of Oregon Coast coho salmon is either: (1) much reduced from
abundance levels in 2006, or (2) exhibiting delayed run timing from previous years. As
of December 13, 2007, the average peak number of spawners per mile was below 2006
levels in 38 of 41 surveyed streams (ODFW 2007 in 73 FR 7816). It is possible that the
timing of peak spawner abundance is delayed relative to previous years, and that
increased spawner abundance in late December and January 2008 will compensate for the
low levels observed thus far.
The recent five year geometric mean abundance (2002-2006) of approximately 152, 960
total natural spawners remains well above that of a decade ago (approximately 52,845
from 1992-1996). However, the decline in productivity from 2003 to 2006, despite
generally favorable marine survival conditions and low harvest rates, is of concern. (73
FR 7816). The long-term trends in productivity in this ESU remain strongly negative.
Critical Habitat
Critical habitat was proposed for Oregon Coast coho salmon on December 14, 2004 (69
FR 74578). The final designation of critical habitat is included in the final rule published
on February 11, 2008 (73 FR 7816). Approximately 6,568 stream miles (10,570 km) and
15 square miles (38.8 sq km) of lake habitat are designated critical habitat. Refer to the
final rule for a detailed description of the watersheds included in the critical habitat, and a
map for each subbasin.
Sockeye Salmon
Description of the Species
Sockeye salmon occur in the North Pacific and Arctic oceans and associated freshwater
systems. This species ranges south as far as the Klamath River in California and northern
Hokkaido in Japan, to as far north as far as Bathurst Inlet in the Canadian Arctic and the
Anadyr River in Siberia. We discuss the distribution, life history diversity, status, and
critical habitat of the two endangered and threatened sockeye species separately.
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