Juvenile coho salmon (101-400 mm) were sampled by
purse seine off the Pacific Coast from Waatch Point,
Washington to Four Mile Creek, Oregon, out to 30 mi
offshore, during the months of May, June, and September in
1982 and 1983. Sea surface temperature, surface salinity,
surface chlorophyll-a concentration, and Secchi...
Euphausia pacifica lives for a period of approximately one year,
disappearing from the catches at a size of about 22-24 mm. Spawning,
which occurs mainly inshore, extends from June through December
but generally is most prominent in the autumn months.
Average growth is calculated to be approximately 2.0 mm per...
Of the common adult lanternfishes found off Oregon, two
species have fat-invested swimbladders (Stenobrachius
leucopsarus Eigenmann and Eigenmann 1890 and Stenobrachius
nannochir Gilbert 1891), two species have reduced swimbladders
(Lampanyctus ritteri Gilbert 1915 and Lampanyctus galis
Gilbert 1891), two species have gas-filled swimbladders
((Protomyctophum thomp soni (Chapman 1944)) and (Protomyctophum...
This study examines the relationship between fishing activities
of Pacific Northwest albacore fishermen and the availability of albacore.
Tactical responses of troll-boat fishermen were compared to
changes in daily apparent albacore abundance. Tactical responses
included boat aggregation and total applied effort (number of boats)
within a particular area, and net...
This study is an investigation of the endogenous, or internal,
rhythms of activity in the ocean shrimp, Pandalus jordani, Groups
of shrimp were kept in constant light and temperature conditions in
the laboratory, and activity was monitored visually and with infrared
photography. Other groups of animals were exposed to 24-hour...
The 36 samples collected with a 22-foot semi-balloon shrimp
trawl at depths from 40 to 1,829 meters off the central coast of
Oregon between July 1961 and June 1962 provided preliminary data
on the distribution, species composition, and associations of benthic
fishes with respect to depth and sediment type.
Sixty-seven...
Sound scattering by marine organisms was studied off the
Oregon coast and between Hawaii and Adak, Alaska. Variations in
scattering were observed over a period of several hours, over did
(24-hour) periods, from month to month, from inshore to offshore,
in relation to biomass of midwater animals, and temperature and...