"Cotton fur" (CF) in mink (Mustela vison) is characterized
by lack of pigment in the underfur of dark mink and is part of a
syndrome including hypochromic, microcytic anemia and substandard
growth, resulting from an iron deficiency. Such symptoms
are produced by feeding rations containing raw Pacific hake
(Merluccius productus),...
Research on mammalian pigmentation has ranged from basic
studies on biochemistry of melanin formation to more practical
studies involving effects of nutrition, environment and genetics on
hair color. In mink such studies have an added significance as fur
color is of considerable economic importance; however, research in
this area has...
A study of the population ecology of Columbia River fall chinook
salmon, Oncorhynchus tshawytscha (Walbaum), was made in an attempt
to determine the cause of a serious decline in this run which occurred
in the early 1950's. Fluctuations in abundance of major salmon runs
the North Pacific were examined to...
An anemia of juvenile chinook salmon (Oncorhynchus tshawytscha) is described and stages of development separated by recognizable syndromes. A vitamin E-deficient diet of low rancidity produced a severe microcytic anemia with strong immature red cell response and granulocytosis occurring 2 to 4 weeks before a drop in hemoglobin and hematocrit...
This report discusses public interaction with personal-use fisheries. It also discusses reasons for razor clam violations and means taken to try and decrease them. Finally, it gives the total harvest and age composition data, and contains the results of a survey of clam diggers on Clatsop County beaches for 1965.
This document is a summary of the March 1968 meeting to determine the cause of an oyster mortality incident. It answers several questions about criteria for establishing the causative organism and discusses programs for studying oyster mortalities.
"Gnat Creek heir, constructed with federal funds and was completed in October 1955. Primary objectives were to quantitatively study fail chinook and silver salmon to: (1) determine the survival, timing, and size of juvenile salmonids resulting from natural spawning; (2) measure the survival of hatchery eared fingerlings and yearlings; (3)...
"Letters and newspaper articles concerning the low quantity and poor quality of Dungeness crabs in Nehalem Bay have been frequently received by the Oregon Fish Commission. Popular opinion usually places the blame for the lack of legal-sized bay crabs in the Nehalem estuary upon the adjacent commercial crab fisheries, A...
Correlation was sought between abundance of mycorrhizae on
Douglas-fir seedlings and their survival in field plantations.
One possible indication of dormancy desirable for lifting from
nursery beds could be the varying seasonal abundance of ectotrophic
mycorrhizae on roots of seedlings. No direct correlation between percentage
of mycorrhizae and survival in...