Bluegill growth as modified by plant density: an exploration of underlying mechanisms
Jacqueline F. Savino, Elizabeth A. Marschall, Roy A. Stein
1992, Oecologia (89) 153-160
Bluegill (Lepomis macrochira) growth varies inconsistently with plant density. In laboratory and field experiments, we explored mechanisms underlying bluegill growth as a function of plant and invertebrate density. In the laboratory, bluegills captured more chironomids (Chironomus riparius) than damselflies (Enallagma spp. and Ischnura spp.), but energy intake per...
Diets of emerald and spottail shiners and potential interactions with other western Lake Erie planktivorous fishes
Kyle J. Hartman, Bruce Vondracek, Donna L. Parrish, Kenneth M. Muth
1992, Journal of Great Lakes Research (18) 43-50
Emerald shiner (Notropis atherinoides) and spottail shiner (N. hudsonius) were abundant historically in western Lake Erie. Recent changes in the fish community suggest that shiners may not compete favorably with the invading white perch (Morone americana) or the gizzard shad (Dorosoma cepedianum). We examined the diets of emerald and spottail...
Density-dependent recruitment of the bloater (Coregonus hoyi) in Lake Michigan
Edward H. Brown Jr., Gary W. Eck
1992, Polskie Archiwum Hydrobiologii (39) 289-297
Density-dependent recruitment of the bloater (Coregonus hoyi) in Lake Michigan during and after recovery of the population in about 1977-1983 was best reflected in the fit of the Beverton-Holt recruitment function to age -1 and -2 recruits and estimated eggs of parents surveyed with trawls. A lower growth rate...
Hierarchical ana lytical approach to evaluating the transport and biogeochemical fate of organic compounds in sewage-contaminated groundwater, Cape Cod, Massachusetts
B. Barber II
1992, Book chapter, Groundwater contamination and analysis at hazardous waste sites
No abstract available ...
Comparison of spatial variability in visible and near-infrared spectral images
P.S. Chavez Jr.
1992, Photogrammetric Engineering and Remote Sensing (58) 957-964
The visible and near-infrared bands of the Landsat Thematic Mapper (TM) and the Satellite Pour l'Observation de la Terre (SPOT) were analyzed to determine which band contained more spatial variability. It is important for applications that require spatial information, such as those dealing with mapping linear features and automatic image-to-image...
Late quaternary uplift rates of marine terraces on the Pacific coast of North America, southern Oregon to Baja California sur
D.R. Muhs, T. K. Rockwell, G. L. Kennedy
1992, Quaternary International (15-16) 121-133
Marine terraces are common landforms along the Pacific coast of North America from southern Oregon to southern Baja California. We report 60 new uranium-series ages of marine terrace corals, hydrocorals, and other fossils. Terraces representing the ca. 80 ka and ca. 125 ka high stands of sea are the most...
A review of differentiation in Great Lakes ciscoes
Thomas N. Todd, Gerald R. Smith
1992, Polskie Archiwum Hydrobiologii (39) 261-267
Seven species of ciscoes (Coregonus, subgenus Leucichthys) were found in the Great Lakes as recently as the early 1950's. Variation within and among species of Great Lakes ciscoes indicates that much of the divergence occurred within lakes. Following postglacial colonization by perhaps two or three species, population differentiation began with...
Carbon limitation of denitrification rates in an anaerobic groundwater system
P. M. Bradley, M. Fernandez Jr., F. H. Chapelle
1992, Environmental Science & Technology (26) 2377-2381
No abstract available....
Use of visible implant tags compared in Atlantic salmon and lake trout
H. L. Kincaid
1992, Research Information Bulletin 43
No abstract available at this time...
Diurnal flight time of wintering Canada geese: consideration of refuges and flight energetics
J. E. Austin, D.D. Humburg
1992, Prairie Naturalist (24) 21-30
We monitored individual radio-equipped Canada geese (Branta canadensis) associated with a federal refuge to assess flight activities from late fall through spring. The number of flights per day was lowest in late fall when most geese remained within the refuge and highest in spring when they moved increasingly beyond the...
Brucellosis: a political disease
B. Smith, T.J. Roffe
1992, Bugle (9) 71-80
With the challenges confronting North America's elk herds today, a bacteria that causes a nonfatal disease in a few elk herds seems an unlikely addition to the list. Fragmentation of habitat, dwindling bull-cow ratios, grazing competition from livestock on public rangelands, or the crowding of favorite hunting spots all seem...
Home range and movements of desert tortoises (Gopherus agassizii)
T. C. Esque, C. Peterson, L.A. DeFalco, C.R. Tracy
1992, American Zoologist (32) 91A-91A
No abstract available....
Nest and nest site characteristics of some ground-nesting, non-passerine birds of northern grasslands
Harold A. Kantrud, Kenneth F. Higgins
1992, Prairie Naturalist (24) 67-84
We summarized biological and ecologic characteristics of 2490 nests of 16 species of upland-nesting, non-passerine birds of northern grasslands found during 1963 through 1991. Nest initiation and hatch dates, clutch sizes, nest fates, causes of failure, success rates of nests among major habitat types and land uses, and vegetation measurements...
The fairly true elephant-shrew
G. B. Rathbun
1992, Natural History (101) 54-61
No abstract available at this time...
Tuberculosis: Will it infect wild elk?
T.J. Roffe, B. Smith
1992, Bugle (9) 86-92
Tuberculosis! Just the name conjures up images of a devastating, chronic, debilitating disease. And so it is in both humans and animals. Tuberculosis (TB) is not known to be present to any significant degree in the free-ranging elk herds of North America. But increasing reports of TB in deer species-including...
Influence of age and selected environmental factors on reproductive performance of canvasbacks
Jerome R. Serie, David L. Trauger, Jane E. Austin
1992, Journal of Wildlife Management (56) 546-556
Age, productivity, and other factors affecting breeding performance of canvasbacks (Aythya valisineria) are poorly understood. Consequently, we tested whether reproductive performance of female canvasbacks varied with age and selected environmental factors in southwestern Manitoba from 1974 to 1980. Neither clutch size, nest parasitism, nest success, nor the number of ducklings/brood...
Survival and other observations of adult female northern pintails molting in California
M. R. Miller, J. P. Fleskes, D.L. Orthmeyer, D.S. Gilmer
1992, Journal of Field Ornithology (63) 138-144
Survival rates of nine adult female Northern Pintails (Anas acuta) that became flightless after being radio-marked in the Sacramento Valley, California in August 1987-1989 were estimated. Seven of the radio-marked pintails molted in the Sacramento Valley, a nontraditional molting region, and two flew 280 km north to the Klamath Basin...
First flowering dates and flowering periods of prairie plants at Woodworth, North Dakota
J.M. Callow, H.A. Kantrud, K.F. Higgins
1992, Prairie Naturalist (24) 57-64
We recorded flowering events for 97 species of prairie plants for 2-6 years near Woodworth, ND. Earliest and latest flower initiation dates varied by year. Temperature seemed much more important than precipitation in influencing phenology of species that bloom from late March through May, but no strong climatic effect was...
Developing a raster profile for the spatial data transfer standard
David D. Greenlee
1992, Cartography and Geographic Information Systems (19) 300-302
No abstract available....
A technique for the reduction of banding in Landsat Thematic Mapper Images
Dennis L. Helder, Bruce K. Quirk, Joy J. Hood
1992, Photogrammetric Engineering and Remote Sensing (58) 1425-1431
The radiometric difference between forward and reverse scans in Landsat thematic mapper (TM) images, referred to as "banding," can create problems when enhancing the image for interpretation or when performing quantitative studies. Recent research has led to the development of a method that reduces the banding in Landsat TM data...
A hydrogen-oxidizing, Fe(III)-reducing microorganism from the Great Bay estuary, New Hampshire
F. Caccavo Jr., R.P. Blakemore, Derek R. Lovley
1992, Applied and Environmental Microbiology (58) 3211-3216
A dissimilatory Fe(III)- and Mn(IV)-reducing bacterium was isolated from bottom sediments of the Great Bay estuary, New Hampshire. The isolate was a facultatively anaerobic gram-negative rod which did not appear to fit into any previously described genus. It was temporarily designated strain BrY. BrY grew anaerobically in a defined medium...
Structural evolution of an arc-basin: The Gravina Belt in central southeastern Alaska
Peter J. Haeussler
1992, Tectonics (11) 1245-1265
The upper Middle Jurassic-Lower Cretaceous Gravina belt lies along the eastern margin of the Alexander terrane in southeastern Alaska. This group of turbidites and mafic to intermediate volcanic rocks was deformed during mid to Late Cretaceous time during the closing of a basin of unknown size between the Alexander terrane...
Evaluation of methyl fluoride and dimethyl ether as inhibitors of aerobic methane oxidation
Ronald S. Oremland, Charles W. Culbertson
1992, Applied and Environmental Microbiology (58) 2983-2992
Methyl fluoride (MF) and dimethyl ether (DME) were effective inhibitors of aerobic methanotrophy in a variety of soils. MF and DME blocked consumption of CH4 as well as the oxidation of 14CH4 to 14CO2, but neither MF nor DME affected the oxidation of [14C]methanol or [14C]formate to 14CO2. Cooxidation of ethane and propane by methane-oxidizing...
Bluff recession rates along the Lake Michigan shoreline in Illinois
R.W. Jibson, J.-M. Staude
1992, Bulletin of the Association of Engineering Geologists (29) 103-117
For two time periods, 1872-1937 and 1937-1987, rates of retreat vary from 10 to 75 cm/yr between discrete segments of bluffs (defined by lithology) and between time periods for a given bluff segment. The average retreat rates for the entire area, however, do not vary significantly between the two time...
Isostatic residual gravity map of the Palm Springs 1:100,000-scale quadrangle, California
David A. Ponce, Victoria E. Langenheim
1992, Open-File Report 92-702
No abstract available....
