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

the 1997 status review due to resampling of data using new video counting technology.
The Makah Fisheries biologists estimate that previous counts of adult sockeye salmon
returning to the lake were underestimates, and they have attempted to correct run-size
estimates based on their assessments of human error and variations in interannual run
timing (Makah Fisheries Management 2000) in (Good, Waples et al. 2005).
The most recent (1996-2003) run-size estimates range from a low of 1,609 in 1997 to a
high of 5,075 in 2003, averaging approximately 3,600 sockeye per year (Hard, Jones et
al. 1992; Haggerty, Ritchie et al. 2007). For return years 2000 to 2003, the four-year
average abundance estimate was slightly over 4,600 sockeye (Haggerty, Ritchie et al.
2007). Because run-size estimates before 1998 are likely to be even more unreliable than
recent counts, and new counting technology has resulted in an increase in estimated run
sizes, no statistical estimation of trends is reported. The current trends in abundance are
unknown for the beach spawning aggregations. Although overall abundance appears to
have declined from historical levels, whether this resulted in fewer spawning
aggregations, lower abundances at each aggregation, or both, is unknown (Good, Waples
et al. 2005). It is estimated that between 35,500 and 121,000 spawners could be normally
carried after full recovery (Hard, Jones et al. 1992).
There has been no harvest of Ozette Lake sockeye salmon for the past four brood cycle
years (since 1982). Prior to that time, ceremonial and subsistence harvests by the Makah
Tribe were low, ranging from 0 to 84 fish per year. Harvest has not been an important
mortality factor for the population in over 35 years. In addition, due to the early river
entry timing of returning Ozette Lake sockeye salmon (beginning in late April, with the
peak returns prior to late-May to mid-June), the fish are not intercepted in Canadian and
U.S. marine area fisheries directed at Fraser River sockeye salmon. There are currently
no known marine area harvest impacts on Ozette Lake sockeye salmon.
According to Good et al. (2005) it appears that overall abundance is low for this
population, which represents an entire ESU, and may be substantially below historical
levels. The number of returning adults in the last few years has increased. However, a
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