Knowledge of the pelagic organisms in vast areas of the open ocean is very limited. This is particularly true of the small nekton or swimming forms such as fishes, squid, prawns and euphausiids, which are important as intermediate animals in the food chain and are preyed upon by species such...
One of the biggest advantages of remote sensing is that large areas of the earth's surface can be surveyed in short periods of time, providing nearsynoptic "pictures." Repeated surveys of one area, like time-lapse photography, can be interpreted as a movie to illustrate the dynamics of detectable features. These attributes...
Gamma-emitting radionuclides were found in benthic fishes from
depths of 50-280O m off the Oregon coast from 1964-1971. 65Zn, 60Co,
54Mn, 144Ce, 137Cs and 40K were present. Zinc-65, originating mainly
from the nuclear reactors on the Columbia River, was the predominant
artifically-induced radionuclide. Levels of 6Zn per g and specific...
This annual report describes progress in marine radioecological studies
under USAEC Contract Number AT(45-1)2227 Task Agreement 12 during the period
1 July 1970 through 30 June 1971. This contract number replaces USAEC
Contract Number AT(45-1)1750 which started 1 June 1962. Although the basic
report format has not been greatly changed...
During July 1970, albacore boats trolling surface jigs (jig boats) had record catches in an area off the mouth of the Columbia River. The jig fishery declined suddenly in late July and was poor throughout the remainder of the summer. No obvious oceanographic changes were correlated with these drastic changes...