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Filtering by: Subject Northern anchovy -- Ecology -- Oregon

Ecology of the northern subpopulation of northern anchovy (Engraulis mordax) in the California Current large marine ecosystem

Creator:

Litz, Marisa N. C.

Abstract:

Northern anchovy (Engraulis mordax) are a dominant forage fish in the California Current large marine ecosystem (CCLME). However, little is known about northern anchovy abundance, distribution, age structure, or population fluctuations relative to ocean conditions in the eastern boundary upwelling system off the U.S. West Coast. This thesis includes three...

Resource Type:

Masters Thesis

Full Text:

primary studies of northern anchovy in the CCLME off Oregon and Washington using data collected during
Distribution and habitat associations of the northern pygmy-owl in Oregon

Creator:

Sater, Dawn M.

Abstract:

I conducted acoustic lure surveys of northern pygmy-owls (Glaucidium gnoma) on transects that were systematically placed in forested areas throughout the state of Oregon. My objectives were to determine if pygmy-owls were associated with particular forest types, ecoregions, or with large-diameter dominant overstory trees. I also examined temporal variation in...

Resource Type:

Masters Thesis

Full Text:

Associations of the Northern Pygmy-owl in Oregon. Abstract approved: Eric D. Forsman I conducted acoustic
Competitive interactions and resource partitioning between northern spotted owls and barred owls in western Oregon

Creator:

Wiens, J. David

Abstract:

The federally threatened northern spotted owl (Strix occidentalis caurina) is the focus of intensive conservation efforts that have led to much forested land being reserved as habitat for the owl and associated wildlife species throughout the Pacific Northwest of the United States. Recently, however, a relatively new threat to spotted...

Resource Type:

Dissertation

Full Text:

Resource Partitioning Between Northern Spotted Owls and Barred Owls in Western Oregon by J