Nesting habitat and ecology of Aleutian terns on the Copper River Delta, Alaska

1980-02-28 (iso8601)

Culturing conditions and their effects on survival and growth of the crayfish...

1974-05-30 (iso8601)

Caspian tern (Hydroprogne caspia) foraging ecology and predation on juvenile salmonids...

Brooks Island, located in central San Francisco Bay, California, currently supports the largest breeding colony of Caspian terns (Hydroprogne caspia) in the Bay Area, and is one of several proposed relocation sites for some Caspian terns from the...

2011-07-15 (iso8601)

The effect of maternal condition on sex ratio of offspring of grey-tailed voles

1979-09-27 (iso8601)

Implications of dietary lipid and carbohydrate intake on the liver and the...

The hypotheses to be tested in this investigation are: 1) there is a threshold level of liver lipid and glycogen content above which the health condition of hatchery-reared fish is impaired, 2) fatty and high glycogen livers impair liver function...

1985-10-03 (iso8601)

Relative resistance of the Coho salmon (Oncorhynchus kisutch) and the Chinook salmon...

The relative resistance of the coho salmon (Oncorhynchus kisutch) and the chinook salmon (O. tshawyscha) to the parasitic larvae (glochidia) of the freshwater mussel (Margaritifera margaritifera) was studied in an attempt to determine why the coho...

1975-09-29 (iso8601)

The use of the embryonic stages of the bay mussel, Mytilus edulis Linnaeus, as a...

1967-04-18 (iso8601)

Effects of the insecticide Sevin on the cockle clam Clinocardium nuttalli (Conrad)

1968-05-10 (iso8601)

Laboratory studies on the food consumption, growth, and activity of juvenile coho salmon

1967-10-27 (iso8601)

Reproductive success and nesting habitat of loggerhead shrikes in shrubsteppe communities

1992-05-15 (iso8601)

Female black bear habitat selection and home range ecology in the central Oregon Cascades

1997-04-29 (iso8601)

Formulation of a synthetic seawater for bioassays with Mytilus edulis embryos

Commerical preparations and published formulations using reagent chemicals for seawater substitutes were not biologically acceptable to Mytilus edulis embryos, in that calcification did not occur. When Leslie coarse hide salt was used as the...

1967-05-10 (iso8601)

Genetic aspects of lead toxicity in laboratory populations of guppies (Poecilia...

The heritability of resistance to death from the effects of lead in laboratory guppy populations was determined from comparisons between progeny produced in a nested breeding experiment and from mass selection experiments. Resistance was measured...

1973-06-21 (iso8601)

Effects of ethyl mercury on some parameters of reproduction in ring-necked pheasants

Prior to onset of the breeding season, a ration containing 18.4 mg/kg N-(Ethylmercuri)-p-toluene sulphonanilide was fed to 6 male and 16 female ring-necked pheasants (Phasianus colchicus). Birds receiving the mercury-treated ration were separated...

1971-05-10 (iso8601)

Fish production and related limnology in two experimental ponds as influenced by...

The merits of fertilizing warmwater fish ponds with dry organic manure were studied from October, 1964 to November, 1965 using two experimental ponds in the Willamette Valley. One pond (pond II) was fertilized with urea and single superphosphate...

1966-06-27 (iso8601)

Studies on the molluscan and fish hosts of the "salmon poisoning" fluke, Nanophyetus...

This study¹ was undertaken: (1) to obtain information on the distribution of the snail, Oxytrema silicula, in three coastal rivers in Oregon, and the seasonal incidence of infection in these snails and in snails from an inland stream, with the...

1966-03-02 (iso8601)

Home range, dispersal, homing and density of the Townsend mole Scapanus townsendii...

Home range, dispersal, homing and density of Townsend's mole, Scapanus townsendii (Bachman), were studied during 1964 near Tillamook, Oregon. Additional information on the success of marking and capture techniques and the response of moles to...

1965-05-14 (iso8601)

The horizontal distribution and vertical migrations of the limnetic zooplankton in...

During the summers of 1967 and 1968 the horizontal distribution and did vertical migrations of zooplankton were studied within the unique environment of Crater Lake. Sampling of the horizontal distribution was done by towing plankton nets...

1969-05-06 (iso8601)

Estimation of chronically safe zinc concentrations with steelhead trout (Salmo...

1980-04-24 (iso8601)

Efficacy of sodium fluoroacetate in reducing ground squirrel damage to alfalfa

Damage by Belding's ground squirrel (Spermophilus beldingi) to alfalfa (Medicago sativa) and the efficacies of various poisoning regimes to reduce damage were evaluated during March-July, 1976 and 1977. Regimes examined were designed to measure...

1979-06-01 (iso8601)

Importance of the upper littoral zone as rearing area for larval and juvenile fishes in...

Shallow-water habitats (< 0.5 m depth) of the upper littoral zone of John Day Pool of the Columbia River were heavily used by young fishes in comparison with lower littoral and limnetic waters. Through the season, 96.9% of the 64,700 larvae and...

1984-06-26 (iso8601)

A simulation model of English sole (Parophrys vetulus) recruitment mechanisms

1983-11-21 (iso8601)

Thermally modulated biliary excretion of taurocholate in rainbow trout

Biliary excretion of taurocholate in thermally acclimated rainbow trout was stimulated at higher environmental temperature (18 vs. 14 or 10° C)e Acute 4° C shifts in body temperature produced more pronounced changes in biliary excretion. Thermally...

1984-07-19 (iso8601)

Behavioral response of juvenile coho salmon (Oncorhynchus kisutch) to olfactory cues

1983-05-20 (iso8601)

Aspects of the life history and feeding ecology of walleye (Stizostedion vitreum...

1982-12-03 (iso8601)