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

salmon, Northern California steelhead, Columbia River chum salmon, Hood Canal summer-run
chum salmon, and Oregon Coast coho salmon populations will likely show reductions in
viability due to the reregistration of carbaryl and carbofuran. We also concluded that all but
Ozette Lake sockeye salmon, Snake River sockeye salmon, Northern California steelhead,
Columbia River chum salmon, Hood Canal summer-run chum salmon, Oregon Coast coho
salmon, Snake River fall-run Chinook salmon, Snake River spring-summer-run Chinook salmon,
California Coastal Chinook salmon, and Snake River steelhead populations will likely show
reductions in viability due to the reregistration of methomyl. The effects of EPA’s proposed
action are first manifested at the individual-level where reductions in individual fitness are
expected. We showed that an individual’s survival, migration, and growth are all significantly
reduced by the proposed action. We also showed that these reductions are likely intensified by
co-occurring stressors in the action area including the presence of other carbamates and OP
insecticides in the action area.
Therefore, given the severity of expected changes in the annual population growth rate for
affected populations, it is likely that California Coastal Chinook salmon, Central Valley springrun
Chinook salmon, LCR Chinook salmon, Puget Sound Chinook salmon, Sacramento River
winter-run Chinook salmon, Snake River fall-run Chinook salmon, Snake River spring/summerrun
Chinook salmon, UCR spring-run Chinook salmon, Upper Willamette River Chinook
salmon, Central California Coast coho salmon, Southern Oregon and Northern Coastal California
coho salmon, Central California Coast steelhead, California Central Valley steelhead, LCR
steelhead, MCR steelhead, Snake River Basin steelhead, South-Central California Coast
steelhead, Southern California steelhead, UCR steelhead, and Upper Willamette River steelhead
will experience reductions in viability, which ultimately reduces the likelihood of survival and
recovery of these species. The Ozette Lake sockeye salmon, Snake River sockeye salmon,
Northern California steelhead, Columbia River chum salmon, Hood Canal summer-run chum
salmon, and Oregon Coast coho salmon will not likely experience reductions in viability.
Effects of the Proposed Action to Designated Critical Habitat
NMFS’ critical habitat analysis determines whether the proposed action will destroy or adversely
modify critical habitat for ESA-listed species by examining any change in the conservation value
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