A natural epizootic of infectious haematopoietic necrosis in imported Atlantic salmon, Salmo salar L., reared in the enzootic region
D. Mulcahy, J. Wood
1986, Journal of Fish Diseases (9) 173-175
In June 1984, fry of Atlantic salmon, Salmo salar L., (0-3 g mean weight), being reared in a hatehery operated by the University of Washington, began to die and infectious haematopoietic necrosis (IHN) was diagnosed. A total of 40 000 fry were being held in 11 tanks. Mortality due to...
Seismic Computerized Alert Network
Henry Spall, editor(s)
1986, Earthquakes & Volcanoes (USGS) (18) 153-153
In 1985 the USGS devised a model for a Seismic Computerized Alert Network (SCAN) that would use continuous monitoring of seismic data from existing types of instruments to provide automatic, highly-reliable early warnings of earthquake shaking. In a large earthquake, substantial damaging ground motions may occur at great distances from...
Prototype operational earthquake prediction system
Henry Spall, editor(s)
1986, Earthquakes & Volcanoes (USGS) (18) 151-152
An objective if the U.S. Earthquake Hazards Reduction Act of 1977 is to introduce into all regions of the country that are subject to large and moderate earthquakes, systems for predicting earthquakes and assessing earthquake risk. In 1985, the USGS developed for the Secretary of the Interior a program for...
Research in earthquake prediction - the Parkfield prediction experiment
Henry Spall
1986, Earthquakes & Volcanoes (USGS) (18) 148-148
The 15-mile-long Parkfield, California, section of the Sam Andreas fault is the best understood earthquake source region in the world. Moderate-sized earthquakes of local magnitude 5 3/4 occurred at Parkfield in 1881, 1901, 1922, 1934, and 1966....
Predictive models in hazard assessment of Great Lakes contaminants for fish
Dora R. May Passino
1986, Conference Paper, Proceedings of the technology transfer conference, part b: water quality research
A hazard assessment scheme was developed and applied to predict potential harm to aquatic biota of nearly 500 organic compounds detected by gas chromatography/mass spectrometry (GC/MS) in Great Lakes fish. The frequency of occurrence and estimated concentrations of compounds found in lake trout (Salvelinus namaycush) and walleyes (Stizostedion vitreum vitreum)...
A new view for resource managers
Robert H. Haas
1986, Rangelands (8) 99-102
In decades past, the rancher depended upon reports from cowboys to gather information he needed to make management decisions. Today, the vast open ranges of the cowboy era are mostly gone in the United States-fenced into pastures, paddocks, or fields that are now discrete management units. But fencing in the...
Processing techniques for the production of an experimental computer-generated shaded-relief map
Damon D. Judd
1986, American Cartographer (13) 72-79
An experimental computer-generated shaded-relief map of a topographic quadrangle of Nome, Alaska, at 1:1,000,000 scale was created to demonstrate current capabilities of map production. This paper describes the techniques used to produce the map product. The data consisted of forty-eight 1° by 1° blocks of resampled digital elevation model (DEM) data....
Cluster molecular orbital description of the electronic structures of mixed-valence iron oxides and silicates
David M. Sherman
1986, Solid State Communications (58) 719-723
A molecular orbital description, based on spin-unrestricted Xα-scattered wave calculations, is given for the electronic structures of mixed valence iron oxides and silicates. The cluster calculations show that electron hopping and optical intervalence charge-transger result from weak FeFe bonding across shared edges of FeO6 coordination polyhedra. In agreement with Zener's double exchange...
Effects of a Kentucky flood-control reservoir on macroinvertebrates in the tailwater
J.F. Novotny
1985, Hydrobiologia (126) 143-153
The effects of a flood-control reservoir on downstream macroinvertebrates were assessed by comparing the tailwater community with that of a natural stream. Samples were collected 1.6 and 21.1 km below Barren River Lake dam in 1979, 1980, and 1981 and in a reservoir tributary in 1980 and 1981. An indication...
Artificial infestation of largemouth bass and walleye with glochidia of Lampsilis ventricosa (Pelecypoda: Unionidae)
D. L. Waller, L. E. Holland Bartels, L. G. Mitchell, T. W. Kammer
1985, Freshwater Invertebrate Biology (4) 152-153
The unionid mussel Lampsilis ventricosa is a bundant in the upper Mississippi River and provides a model for studies related to recovery of the endangered Higgins' eye mussel (Lampsilis higginsi). We tested the suitability of two species of fish species as hosts for glochidia of L. ventricosa. Laboratory-reared largemouth bass...
Retention behavior of long chain quaternary ammonium homologues and related nitroso-alkymethylamines
S. L. Abidi
1985, Journal of Chromatography (324) 209-230
Several chromatographic methods have been utilized to study the retentionbehavior of a homologous series of n-alkylbenzyldimethylammonium chlorides (ABDAC) and the corresponding nitroso-n-alkylmethylamines (NAMA). Linear correlation of the logarithmic capacity factor (k') with the number of carbons in the alkyl chain provides useful information on both gas chromatographic (GC) and high-performance...
Optimal management strategies in variable environments: Stochastic optimal control methods
B. Kenneth Williams
1985, Journal of Environmental Management (21) 95-115
Dynamic optimization was used to investigate the optimal defoliation of salt desert shrubs in north-western Utah. Management was formulated in the context of optimal stochastic control theory, with objective functions composed of discounted or time-averaged biomass yields. Climatic variability and community patterns of salt desert...
The need for accuracy in modelling: An example
Douglas H. Johnson, M.J. Conroy, J.D. Nichols
1985, Ecological Modelling (30) 157-161
The need for accurate information in modelling depends on the objectives of the effort. but trustworthy data are essential for a model intended for use in the management of natural resources. This point is illustrated by referring to a recently published model of canvasback ducks. We demonstrate that several key...
Goodness-of-fit tests for open capture-recapture models
K. H. Pollock, J.E. Hines, J.D. Nichols
1985, Biometrics (41) 399-410
General goodness-of-fit tests for the Jolly-Seber model are proposed. These tests are based on conditional arguments using minimal sufficient statistics. The tests are shown to be of simple hypergeometric form so that a series of independent contingency table chi-square tests can be performed. The relationship of these...
Interspecific competition among Hawaiian forest birds
Stephen Mountainspring, J. M. Scott
1985, Ecological Monographs (55) 219-239
The object of this study was to determine whether interspecific competition modified local geographic distribution, after taking into account the effect of habitat structure. The tendencies for 14 passerine birds to have positive or negative associations were examined, using 7861 sample points in seven native forests on the islands of...
Analysis of survival data from telemetry projects
C.M. Bunck, Scott R. Winterstein, K. H. Pollock
1985, Book chapter, Raptor Research Foundation Symposium on the Management of Birds of Prey. International Meeting. Session 5. Workshop: Experimental Design and Data Analysis for Telemetry Projects. November 1985,
Telemetry techniques can be used to study the survival rates of animal populations and are particularly suitable for species or settings for which band recovery models are not. Statistical methods for estimating survival rates and parameters of survival distributions from observations of radio-tagged animals will be described. These methods have...
Maximum likelihood methods for investigating reporting rates of rings on hunter-shot birds
M.J. Conroy
B.J.T. Morgan, P.M. North, editor(s)
1985, Book chapter, Statistics in Ornithology
It is well known that hunters do not report 100% of the rings that they find on shot birds. Reward studies can be used to estimate what this reporting rate is, by comparison of recoveries of rings offering a monetary reward, to ordinary rings. A reward study of American Black...
Seasonal Influence of Nutrients on the Physiology and Behavior of Captive Canvasbacks (Aythya valisineria)
Matthew C. Perry
1985, Book
Captive canvasbacks (Aythya valisineria) were maintained ad libitum on five diets during the winters of 1978-79 and 1979-80 to evaluate the effects of varying protein and energy levels on feed intake and condition. Diets were formulated to simulate either a natural diet high in invertebrates or one high in...
Habitat Suitability Index Models: Snowshoe hare
Raymond G. Carreker
1985, FWS/OBS 82/10.101
A review and synthesis of existing information were used to develop a Habitat Suitability Index (HSI) model for the Snowshoe hare (Lepus americanus). The model consolidates habitat use information into a framework appropriate for field application, and is scaled to produce an index between 0.0 (unsuitable habitat) to 1.0 (optimum...
Habitat Suitability Index Models: Swamp rabbit
Arthur W. Allen
1985, FWS/OBS 82/10.107
A review and synthesis of existing information were used to develop a Habitat Suitability Index (HSI) model for the swamp rabbit (Sylvilagus aquaticus). The model consolidates habitat use information into a framework appropriate for field application, and is scaled to produce an index between 0.0 (unsuitable habitat) to 1.0 (optimum...
Habitat Suitability Index Models: Spotted owl
Stephen A. Laymon, Hal Salwasser, Reginald H. Barrett
1985, FWS/OBS 82/10.113
A review and synthesis of existing information were used to develop a Habitat Suitability Index (HSI) model for the spotted owl (Strix occidentalis). The model consolidates habitat use information into a framework appropriate for field application, and is scaled to produce an index between 0.0 (unsuitable habitat) to 1.0 (optimum...
Habitat Suitability Index Models: Lesser scaup (wintering)
Rosemarie Mulholland
1985, FWS/OBS 82/10.91
A review and synthesis of existing information were used to develop a model for evaluating wintering habitat quality for the lesser scaup (Aythya affinis). The model is scaled to produce an index of habitat suitability between 0.0 (unsuitable habitat) to 1.0 (optimal habitat) for Southern Atlantic and Gulf of Mexico...
Habitat Suitability Index Models: White ibis
Terrence M. Hingtgen, Rosemarie Mulholland, Robert W. Repenning
1985, FWS/OBS 82/10.93
White ibises (Eudocimus albus) are members of the family Threskiornithidae in the order Ciconiiformes. They are medium-sized wading birds with a tapering decurved bill. Adults are white with black tips on the four largest primaries. Males tend to be 35% larger than females, averaging 1,036 ± 30 g (33 ±...
Habitat Suitability Index Models: Least tern
Raymond G. Carreker
1985, FWS/OBS 82/10.103
A review and synthesis of existing information were used to develop a Habitat Suitability Index (HSI) model for the least tern (Sterna antillarum). The model consolidates habitat use information into a framework appropriate for field application, and is scaled to produce an index between 0.0 (unsuitable habitat) to 1.0 (optimum...
Habitat Suitability Index Models: Red-spotted newt
Patrick J. Sousa
1985, FWS/OBS 82/10.111
A review and synthesis of existing information were used to develop a Habitat Suitability Index (HSI) model for the red-spotted newt (Notophthalmus viridescens viridescens). The model consolidates habitat use information into a framework appropriate for field application, and is scaled to produce an index between 0.0 (unsuitable habitat) to 1.0...
