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

Status and Trends
The Ozette Lake sockeye salmon ESU was originally listed as a threatened species in
1999 (64 FR 14528). This classification was retained following a species status review
on June 28, 2005 (70 FR 37160).
The historical abundance of Ozette Lake sockeye salmon is poorly documented, but may
have been as high as 50,000 individuals (Blum 1988). Nevertheless, the overall
abundance of naturally–produced Ozette Lake sockeye salmon is believed to have
declined substantially from historical levels. In the first study of lake escapement of
Ozette Lake sockeye salmon (Kemmerich 1945), the run size entering the lake was
estimated at a level of several thousand fish. These counts appear to be roughly double
the current mean lake abundance, considering that they were likely conducted upstream
from fisheries in or near to the Ozette River. Makah Fisheries Management (2000)
concluded that there appears to be a substantial decline in the Tribal catch of Ozette Lake
sockeye salmon beginning in the 1950s and a similar decline in the run size since the
1920s weir counts reported by Kemmerich (1945).
An updated NMFS analysis of total annual Ozette Lake sockeye salmon abundance
(based on adult run size data presented in Jacobs et al. (1996)) indicates a trend in
abundance averaging minus 2% per year over the period 1977 through 1998. The current
tributary-based hatchery program was planned and initiated in response to the declining
population trend identified for the Ozette Lake sockeye salmon population. The updated
analysis also indicated that the most recent ten year (1989-98) trend for the population is
plus 2% per year, improving from the minus 9.9% annual trend reported in Gustafson et
al. (1999).
Data from the early 1900s indicate the spawning population was as large as 10,000 to
20,000 fish in large run years. Recent information on abundance of Ozette Lake sockeye
salmon ESU comes from visual counts at a weir across the lake outlet. Therefore, the
counts represent total run size. The estimates of total run size were revised upward after
136