A study to review the status and distribution of vascular plants at Lewis and Clark National Historical Park was initiated in 2009 and completed in 2010 by the Oregon Natural Heritage Information Center at Oregon State University. This study built on previous inventories conducted under the National Park Service‘s Inventory...
Historical records and intensive field surveys 1975-77
provided information on the population history, ecology, and
current status of wolves (Canis lupus) in Yellowstone National
Park and vicinity. Wolves occurred in unknown but seemingly
low densities during the latter 1800s in several areas of
Yellowstone where they were controlled periodically until...
Personnel of the OFC and OGC sampled various station of Coos Bay, Oregon to define areas used by several species of fish in the bay. Students at the University of Oregon Institute of Marine Biology sampled main channels with an otter trawl and observed animals on the tide flat. Primary...
Recent successes of hatcheries in producing coho salmon have stimulated searches for additional hatchery locations in coastal watersheds. In the past hatcheries were designed with gravity flow water supplies, but in more recent years pumping the water has proven feasible. Because of the acceptance of pumping, naturally impounded waters are...
The OFC staff had been investigating razor clam stocks in Oregon since 1949, and this report outlines their findings up to 1964. It gives the number of razor clams harvested as well as the number of diggers, and the age composition of those clams harvested. Finally, it discusses the increase...
During the summer of 1972 we sampled the Umpqua River estuary to determine distribution of fish populations. As a part of that study temperature and salinity data were collected monthly throughout the estuary. The environmental data should help explain the distributions of various fishes within the estuary and be useful...
Private hatchery operations continued in 1973 and 1974 on more of an experimental than production basis. For 1973-brood chums, OSU increased their production at Whiskey Creek to a release of 761,000 fry and the state sold 247,500 eggs to private operators. AduIt returns to Whiskey Creek in 1973 were encouraging...
The fall chinook index of abundance was 128% of the long-term average, and presumably would have been even higher had survey conditions in the central and north coast not been so difficult.
The surveys of spawning fish in coastal rivers in 1971 indicate that stocks of chum salmon remain at a low, although apparently stabilized level. Fluctuations are probably the result of year-class survival and age at maturity, rather than continued decline of the species.
The fall chinook index of abundance was...