Download or read book Efficacy Toxicity and Residues of Nifurpirinol in Salmonids written by Donald F. Amend and published by . This book was released on 1972 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nifurpirinol (NFP), also know by code name P-7138, was tested for control of furunculosis, myxobacterioses, and vibriosis, and for effects on rainbow trout, coho, and chinook salmon under various conditions. Further tests are needed to verify the use of NFP for control of other bacterial diseases.
Download or read book Technical Papers of the U S Fish and Wildlife Service written by and published by . This book was released on 1974 with total page 494 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ecology of Larval Fishes in Lake Oahe South Dakota written by William Roland Nelson and published by . This book was released on 1980 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: The time and location of spawning, food and larvae, and habitats used as nursery areas by young-of-the-year fishes were studied from 1972 to 1975 in South Dakota waters of Lake Oahe, a main stem Missouri River reservoir. Sampling locations were in the tributary rivres -- the Grand Moreau, and Cheyenne -- and their embayments. Year-class strength of river-spawning species was strongly correlated with river flow rates during the spawning season. Success of reservoir-spawning species was primarily dependent on above-average water levels, which inundated terrestrial vegetation to provide a substrate for egg deposition and cover for larvae. Preserving adequate streamflow and enhancing reservoir shoreline areas by managing water levels, seeding vegetation, and eliminating grazing alongshore would probably ensure adequate reproduction of most areas.
Download or read book Rainbow Trout Growth in Circular Tanks written by James L. Brauhn and published by . This book was released on 1976 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: Prediction equations correlating density of fingerling rainbow trout with growth, yield, and food use efficiency indicated that ammonia nitrogen resulting from high fish densities wes responsible for reductions in all three factors. These predictable density-dependent responses present fish-culturists with alternatives of density selection for evaluation and attainment of specific goals. In examples, fish-culturists, by manipulating density, could achieve rapid growth, produce the maximum weight possible, balance yield with cost, optimize fish quality, or combine two or more of these goals.
Download or read book Resource Publication written by and published by . This book was released on 1965 with total page 644 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bibliography of Research Publications 1928 72 written by Paul H. Eschmeyer and published by . This book was released on 1974 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Resource Publication United States Bureau of Sport Fisheries and Wildlife written by and published by . This book was released on 1973 with total page 1014 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Population Ecology of the Mallard written by and published by . This book was released on 1972 with total page 628 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bibliography of Research Publications of the U S Bureau of Sport Fisheries and Wildlife 1928 72 written by Paul Henry Eschmeyer and published by . This book was released on 1974 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ecological Effects of Dredging and Dredge Spoil Disposal written by James Walter Morton and published by . This book was released on 1977 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: The goal of this study was to prepare a comprehensive review of the literature on the physical, chemical, and biological effects of dredging and spoil disposal in estuaries and to identify alternative spoil disposal methods. Specific objectives were to identify the most critical problems relating to dredging and spoil disposal and to summarize the progress made to date in solving these problems. Using literature search facilities, bibliographies, and communications with experts throughout the United States, about 520 scientific and technical articles on dredging and spoil disposal were screened. Information extracted from selected articles is included in this review.
Download or read book Chlorinated Hydrocarbons as a Factor in the Reproduction and Survival of Lake Trout Salvelinus Namaycush in Lake Michigan written by and published by . This book was released on 1981 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Lake Francis Case a Missouri River Reservoir written by Charles H. Walburg and published by . This book was released on 1977 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: Studies conducted during the first 23 years of impoundment of Lake Francis Case indicated that fish abundance in the early 1970's was about half of that in the late 1950's. Of 39 species collected, 12 were abundant in the 1950's and 8 in the 1970's, but only 4 were abundant throughout the impoundment period.
Download or read book Abundance Composition and Distribution of Crustacean Zooplankton in Relation to Hypolimnetic Oxygen Depletion in West central Lake Erie written by Roy F. Heberger and published by . This book was released on 1977 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: Samples of crustacean zooplankton were collected monthly in west-central Lake Erie in April and June to October 1968, and in July and August 1970, before and during periods of hypolimnetic dissolved oxygen (DO) depletion. The water column at offshore stations was thermally stratified from June through September 1968, and the hypolimnion contained no DO in mid-August of 1968 or 1970. Composition, abundance, and vertical distribution of crustacean zooplankton changed coincidently with oxygen depletion. Zooplankton composition shifted from mainly cyclopoid copepods in July to mainly cladocerans and copepod nauplii in middle to late August. We believe that mortality of adults and dormancy of copepodites in response to anoxia was the probable reason for the late summer decline of planktonic C. b. thomasi.
Download or read book Verification of a Model for Predicting the Effect of Inconstant Temperature on Embryonic Development of Lake Whitefish Coregonus Clupeaformis written by William H. Berlin and published by . This book was released on 1977 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: Eggs stripped from lake whitefish spawning in Lake Michigan were incubated in the laboratory at temperatures similar to those on whitefish spawning grounds in Lake Michigan during December-April. Observed times from fertilization to attachment of each of 21 developmental stages were used to test a model that predicts the rate of development at daily fluctuating temperatures; the model relates rate of development for any given stage j, expressed as the reciprocal of time (Rj), to temperature (T). The generalized equation for a developmental stage is Rj = abt ct[squared]. The model was used to predict the effects of small temperature increases (caused by a hypothetical waste-heat discharge) on the rate of development and time of hatching of lake whitefish eggs.
Download or read book The Progressive Fish Culturist written by U.S. Fish and Wildlife Service and published by . This book was released on 1975 with total page 534 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Progressive Fish Culturist written by and published by . This book was released on 1975 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Annual Report written by U. S. Fish and Wildlife Service and published by . This book was released on 1972 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt:
