Predicting Great Lakes fish yields: tools and constraints
C.A. Lewis, D.H. Schupp, W.W. Taylor, J.J. Collins, Richard W. Hatch
1987, Canadian Journal of Fisheries and Aquatic Sciences (44) 411-416
Prediction of yield is a critical component of fisheries management. The development of sound yield prediction methodology and the application of the results of yield prediction are central to the evolution of strategies to achieve stated goals for Great Lakes fisheries and to the measurement of progress toward those goals....
Lake Superior revisited 1984
Wayne R. MacCallum, James H. Selgeby
1987, Canadian Journal of Fisheries and Aquatic Sciences (44) 23-36
The Lake Superior fish community has changed substantially since the early 1960s, when control of the sea lamprey (Petromyzon marinus) became effective. Self-reproducing stocks of lake trout (Salvelinus namaycush) have been reestablished in many inshore areas, although they have not yet reached pre-sea lamprey abundance; offshore lake trout are probably...
GEOGRAPHIC ESTIMATION OF RUNOFF-MODEL PARAMETERS.
Arthur R. Schmidt, Linda S. Weiss, Kevin A. Oberg
1987, Conference Paper
The U. S. Geological Survey is developing techniques to estimate and evaluate unit-hydrograph and loss-rate parameter values for rainfall-runoff models using Geographic Information System (GIS) procedures. The data base includes basin, soil, and climatological characteristics that will be stored in a GIS, and unit-hydrograph and loss-rate parameters obtained from calibration...
Acid rain stimulation of Lake Michigan phytoplankton growth
Bruce A. Manny, G.L. Fahnenstiel, W.S. Gardner
1987, Journal of Great Lakes Research (13) 218-223
Three laboratory experiments demonstrated that additions of rainwater to epilimnetic lake water collected in southeastern Lake Michigan stimulated chlorophyll a production more than did additions of reagent-grade water during incubations of 12 to 20 d. Chlorophyll a production did not begin until 3–5 d after the rain and lake water were mixed. The stimulation...
Implications of the northwestwardly younger age of the volcanic rocks of west-central California: Alternative Interpretation
Richard G. Stanley
1987, GSA Bulletin (98) 612-614
Fox and others (1985) have made an important contribution to our understanding of iihe evolution of the Mendocino triple junction and the San Andreas transform. They have summarized a large amount of data on the ages and distribution of volcanic centers along the central California coast; their summary clearly shows...
Horizontal ichthyoplankton tow-net system with unobstructed net opening
Robert T. Nester
1987, North American Journal of Fisheries Management (7) 148-150
The larval fish sampler described here consists of a modified bridle, frame, and net system with an obstruction-free net opening and is small enough for use on boats 10 m or less in length. The tow net features a square net frame attached to a 0.5-m-diameter cylinder-on-cone plankton net...
Effects of freezing in and out of water on length and weight of Lake Michigan bloaters
Richard E. Sayers
1987, North American Journal of Fisheries Management (7) 299-301
The purpose of this study was to determine if freezing significantly alters the length or weight of bloaters Coregonus hoyi. Bloaters were collected from southern Lake Michigan and were frozen for periods of 2-200 d. Freezing in water caused a significant decrease in length and a significant increase in weight....
Earthquakes, September-October 1987
W. J. Person
1987, Earthquakes & Volcanoes (USGS) (19) 180-183
Maestrichtian benthic foraminifers from Ocean Point, North Slope, Alaska ( USA).
K. McDougall
1987, Journal of Foraminiferal Research (17) 344-366
Previous studies of fauna and flora from Ocean Point, Alaska, have suggested ages ranging from Campanian to early Eocene and that these assemblages are either highly endemic or commonplace. I demonstrate that the moderately abundant benthic foraminifers constitute early Maestrichtian boreal assemblages common to Canada and northern Europe. Paleoenvironmental analysis...
Analysis of two-color geodimeter measurements of deformation within the Long Valley caldera: June 1983 to October 1985
J. Langbein, M. Linker, D. Tupper
1987, Journal of Geophysical Research Solid Earth (92) 9423-9442
Line length changes from several baselines in a trilateration network within the Long Valley caldera clearly define a decrease in strain rate from June 1983 through October 1985. The data consist of more than 1600 length measurements on 23 baselines using a two-color geodimeter, which has a precision of 0.2...
Probability theory versus simulation of petroleum potential in play analysis
R. A. Crovelli
1987, Annals of Operations Research (8) 363-381
An analytic probabilistic methodology for resource appraisal of undiscovered oil and gas resources in play analysis is presented. This play-analysis methodology is a geostochastic system for petroleum resource appraisal in explored as well as frontier areas. An objective was to replace an existing Monte Carlo simulation method in order to...
Gardner Marsh: drainage, subsidence and restoration of a peat deposit
J.M. Friedman
1987, Thesis
No abstract available....
Mid-Holocene climate in Northern Minnesota
R. M. Forester, L.D. Delorme, J.P. Bradbury
1987, Quaternary Research (28) 263-273
Study of Holocene ostracodes and diatoms from Elk Lake, in North-Central Minnesota, indicates that the local climate of the mid-Holocene can be subdivided into three intervals. Throughout interval 1 (ca. 7800 to 6700 yr B.P.), climate was colder and much drier than today. During intervals 2 and 3 (ca. 6700...
Analysis of extraordinary flood events. U.S.-China bilateral symposium
E.W.H. Kirby, Hua Shi-Qian, L.R. Beard
1987, Journal of Hydrology (96)
The symposium took place in Nanjing on 15-19 October 1985 and this volume contains 29 of the 52 papers presented, most of the authors coming either from China or the USA. The articles are organized into three major topics: 1) detection of historical floods and evaluation of the uncertainties in...
Use of focal mechanisms to determine stress: A control study.
A.J. Michael
1987, Journal of Geophysical Research Solid Earth (92) 357-368
To allow focal mechanisms to be inverted for the stress field requires a different inversion algorithm than for slickenside data because focal mechanisms do not represent fault slip data unless one can decide which nodal plane is the fault plane. If one can decide which nodal plane is the fault...
Stable isotope dilution analysis of hydrologic samples by inductively coupled plasma mass spectrometry
John R. Garbarino, Howard E. Taylor
1987, Analytical Chemistry (59) 1568-1575
Inductively coupled plasma mass spectrometry is employed in the determination of Ni, Cu, Sr, Cd, Ba, Ti, and Pb in nonsaline, natural water samples by stable isotope dilution analysis. Hydrologic samples were directly analyzed without any unusual pretreatment. Interference effects related to overlapping isobars, formation of metal oxide and multiply...
Planting grasslands for wildlife habitat
M.I. Meyer
1987, Report
Water use in the United States, 1980
Wayne Solley, Nancy L. Barber, Charles F. Merk
1987, Report
Evolutionary ecology and the optimality assumption
J.M. Emlen
1987, Book chapter, The Latest on the Best, Essays on Evolution and Optimality
No abstract available ...
Sedimentation in Lake Onalaska, Navigation Pool 7, Upper Mississippi River, since impoundment
C. E. Korschgen, G. A. Jackson, L.F. Muessig, D. Southworth
1987, Journal of the American Water Resources Association (23) 221-226
Sediment accumulation was evaluated in Lake Onalaska a 2800-ha backwater impoundment on the Upper Mississippi River. Computer programs were used to process fathometric charts and generate an extensive data set on water depth for the lake. Comparison of 1983 survey data with pre-impoundment (before 1937) data showed that Lake Onalaska...
Trophic levels and trophic relationships of seabirds in the Gulf of Alaska
G.A. Sanger
J.P. Croxall, editor(s)
1987, Book chapter, Seabirds: Feeding biology and role in marine ecosystems
No abstract available....
Cumulative impacts of oil fields on northern Alaskan landscapes
D.A. Walker, P.J. Webber, Emily F. Binnian, K.R. Everett, N.D. Lederer, E.A. Nordstrand, M.D. Walker
1987, Science (238) 757-761
Proposed further developments on Alaska's Arctic Coastal Plain raise questions about cumulative effects on arctic tundra ecosystems of development of multiple large oil fields. Maps of historical changes to the Prudhoe Bay Oil Field show indirect impacts can lag behind planned developments by many years and the total area eventually...
Responses of three prairie ground squirrel species, Spermophilus franklinii, S. richardsonii, and S. tridecemlineatus, to duck eggs
A.B. Sargeant, M.A. Sovada, R. J. Greenwood
1987, Canadian Field-Naturalist (101) 95-97
Franklin's Ground Squirrels (Spermophilus franklinii) preyed on eggs in 29 of 30 tests in which they were exposed to two Mallard (Anas platyrhynchos) or two Blue-winged Teal (A. discors) eggs and their discovery of eggs was confirmed. No Richardson's (S. richardsonii) or Thirteen-lined (S. tridecemlineatus) ground squirrels preyed on eggs...
The Exclusive Economic Zone: an exciting new frontier
Bonnie A. McGregor, Terry W. Offield
1987, Report
Follow that bird!
M. R. Miller, John Y. Takekawa, J. P. Fleskes
1987, California Waterfowl (13) 5
No abstract available at this time...
