A 50 m² pelagic trawl equipped with a codend opening-closing device was used to sample micronektonic fishes between 500 m and 1000 m. Horizontal tows were made at 500, 650, 800 and 1000 m. Twelve of 15 common species captured showed significant diel differences in abundance at one or more...
In the upper estuary of Yaquina Bay, Oregon, there is an annual
population explosion of Acartia tonsa, (Dana) a calanoid copepod,
during the months of July, August and September, followed by a rapid
decline to virtual extinction in November. The restricted estuarine
distribution affords an excellent opportunity to study the...
The life cycle of Callianassa californiensis Dana, 1854, was
studied in the tidal estuary, Yaquina Bay, Oregon. At this latitude
it is largely restricted to intertidal sandy mudflats under predominately
marine influence. Salinity and temperature appear to determine
its distribution to a greater extent than does sediment type.
Vertical movement...
The principal salinity extrema and extremum surfaces of the
world ocean are described by the analysis and plotting of data from
885 hydrographic stations in the three major oceans, the Southern
Ocean, and the American Mediterranean Sea. The distributions of
salinity, temperature, depth, and density along the extremum surfaces,
plotted...
The nature and magnitude of experimental errors due to ⁶⁵Zn
adsorption by inorganic surfaces was examined in a laboratory system
designed to measure ⁶⁵Zn uptake by marine phytoplankton. In the pH
range, 6.3±.1 to 7.5±.1, a precipitate formed in the algal nutrient
medium selected for the system. To this seawater-base...