The use of waveform shapes to automatically determine earthquake focal depth
S.A. Sipkin
2000, Bulletin of the Seismological Society of America (90) 248-254
Earthquake focal depth is an important parameter for rapidly determining probable damage caused by a large earthquake. In addition, it is significant both for discriminating between natural events and explosions and for discriminating between tsunamigenic and nontsunamigenic earthquakes. For the purpose of notifying emergency management and disaster relief organizations as...
Plants as indicators of focused ground water discharge to a northern Minnesota lake
D.O. Rosenberry, Robert G. Striegl, D.C. Hudson
2000, Ground Water (38) 296-303
Determining the discharge of ground water to Shingobee Lake (66 ha), north-central Minnesota, is complicated by the presence of numerous springs situated adjacent to the lake and in the shallow portion of the lakebed. Springs first had to be located before these areas of more rapid discharge could be quantified....
Broadcast application of a placebo rodenticide bait in a native Hawaiian forest
P.A. Dunlevy, E. Wm. Campbell III, G.D. Lindsey
2000, International Biodeterioration and Biodegradation (45) 199-208
This study consisted of three replicates of controlled field trials using a pelletized placebo (Ramik?? Green formulated without diphacinone) bait treated with a biological marker and broadcast at three application rates - 11.25, 22.5 and 33.75 kg/ha. We determined that Polynesian (Rattus exulans) and roof rats (Rattus rattus) consumed this...
Preface – Groundwater and microbial processes
Barbara Bekins
2000, Hydrogeology Journal (8) 2-3
No abstract available....
Demographic characteristics and population modeling: Chapter 8 in Status, ecology and conservation of the Southwestern Willow Flycatcher (RMRS-GTR-60)
Scott H. Stoleson, Mary J. Whitfield, Mark K. Sogge
Deborah M. Finch, Scott H. Stoleson, editor(s)
2000, General Technical Report RMRS-GTR-60-8
An understanding of the basic demography of a species is necessary to estimate and evaluate population trends. The relative impact of different demographic parameters on growth rates can be assessed through a sensitivity analysis, in which different parameters are altered singly to assess the effect on population growth. Identification of...
Assumptions and practical considerations in the design and interpretation of echolocation-monitoring studies
J. P. Hayes
2000, Acta Chiropterologica (2) 225-236
No abstract available....
Growth and population structure of Emydoidea blandingii from western Nebraska
D.J. Germano, R. Bruce Bury, M. Jennings
2000, Chelonian Conservation and Biology (3) 618-625
No abstract available....
[Book Review] Yellowstone and the biology of time- Photographs across a century
D. L. Peterson
2000, Park Science (19) 12-13
No abstract available....
Colonization and development of stream communities across a 200-year gradient in Glacier Bay National Park, Alaska
Alexander M. Milner, E. Eric Knudsen, Chad Soiseth, Anne L. Robertson, Don Schell, Ian T. Phillips, Katrina Magnusson
2000, Canadian Journal of Fisheries and Aquatic Sciences (57) 2319-2335
In May 1997, physical and biological variables were studied in 16 streams of different ages and contrasting stages of development following glacial recession in Glacier Bay National Park, southeast Alaska. The number of microcrustacean and macroinvertebrate taxa and juvenile fish abundance and diversity were significantly greater in older streams. Microcrustacean...
A survey of current breeding habitats: Chapter 5 in Status, ecology and conservation of the Southwestern Willow Flycatcher (RMRS-GTR-60)
Mark K. Sogge, Robert M. Marshall
Deborah M. Finch, Scott H. Stoleson, editor(s)
2000, General Technical Report RMRS-GTR-60-5
The distribution and abundance of a species across a landscape depends, in part, on the distribution and abundance of appropriate habitat. If basic resource needs such as food, water, and cover are not present, then that species is excluded from the area. Scarcity of appropriate habitat is generally the key...
Breeding season ecology: Chapter 6 in Status, ecology and conservation of the Southwestern Willow Flycatcher (RMRS-GTR-60)
Mark K. Sogge
Deborah M. Finch, Scott H. Stoleson, editor(s)
2000, General Technical Report RMRS-GTR-60-6
The willow flycatcher (Empidonax traillii) breeds across much of the conterminous United States and in portions of extreme southern Canada. As might be expected in such a wide-ranging species, willow fly- catchers in different portions of the range exhibit differences in appearance, song, and ecological characteristics. The intent of this...
Using linear models with correlated errors to analyze changes in abundance of Lake Michigan fishes: 1973-1992
Mary C. Fabrizio, Jonathan Raz, Ramanath R. Bandekar
2000, Canadian Journal of Fisheries and Aquatic Sciences (57) 775-788
We examined annual changes in relative abundance of Lake Michigan fishes using linear models with correlated errors in space and time. Abundance of bloater (Coregonus hoyi), deepwater sculpin (Myoxocephalus thompsoni), slimy sculpin (Cottus cognatus), alewife (Alosa pseudoharengus), and rainbow smelt (Osmerus mordax) was monitored with bottom trawls at 10 discrete...
Alternating seismic uplift and subsidence in the late Holocene at Madang, Papua New Guinea: Evidence from raised reefs
A.W. Tudhope, R. W. Buddemeier, C.P. Chilcott, K.R. Berryman, D.G. Fautin, M. Jebb, J.H. Lipps, R.G. Pearce, T.P. Scoffin, G.B. Shimmield
2000, Journal of Geophysical Research B: Solid Earth (105) 13797-13807
Well-preserved mid-late Holocene coral reefs are exposed in low coastal cliffs in the vicinity of the Madang lagoon on the north coast of Papua New Guinea. Results from U/Th and 14C dating of corals, surveying, and field mapping indicate several major changes in relative sea level over this period. Specifically,...
Nectar plant selection by the Karner blue butterfly (Lycaeides melissa samuelis) at the Indiana Dunes National Lakeshore
Ralph Grundel, Noel B. Pavlovic, Christina L. Sulzman
2000, American Midland Naturalist (144) 1-10
The Karner blue butterfly, Lycaeides melissa samuelis, is an endangered species residing in savanna and barrens habitats in the Midwest and Northeast United States. To improve our understanding of nectar plant selection patterns by the Karner blue, we examined nectar plant choices made by 146 butterflies. Within observation areas of 2-m radius...
Effects of thiamine on reproduction of Atlantic salmon and a new hypothesis for their extirpation in Lake Ontario
H. George Ketola, Paul R. Bowser, Gregory A. Wooster, Leslie R. Wedge, Steven S. Hurst
2000, Transactions of the American Fisheries Society (129) 607-612
Previous researchers demonstrated that a mortality in fry (called Cayuga syndrome) of Atlantic salmon Salmo salar from Cayuga Lake (New York) was associated with low levels of thiamine. They reduced the mortality of fry by bathing or injecting fry with thiamine. We injected four to six gravid female Atlantic salmon with either...
The effects of soil flooding on the establishment of cogongrass (Imperata cylindrica), a nonindigenous invader of the southeastern United States
S.E. King, J.B. Grace
2000, Wetlands (20) 300-306
Cogongrass (Imperata cylindrica), an invasive perennial introduced from Southeast Asia, is currently spreading throughout the southeastern United States from Florida to Louisiana. In the U.S., cogongrass is generally not considered a wetland species, although it’s range is expanding in regions with high wetland abundance. The objective of this...
Asymmetric hybridization and introgression between pink salmon and chinook salmon in the Laurentian Great Lakes
Jonathan A. Rosenfield, Thomas Todd, Roger Greil
2000, Transactions of the American Fisheries Society (129) 670-679
Among Pacific salmon collected in the St. Marys River, five natural hybrids of pink salmon Oncorhynchus gorbuscha and chinook salmon Oncorhynchus tshawytscha and one suspected backcross have been detected using morphologic, meristic, and color evidence. One allozyme (LDH, l-lactate dehydrogenase from muscle) and one nuclear DNA locus (growth hormone)...
Age and growth of pike (Esox lucius) in Chivyrkui Bay, Lake Baikal
Randall W. Owens, Nikolai M. Pronin
2000, Journal of Great Lakes Research (26) 164-173
The purpose of this study was to describe age and growth of pike (Esox lucius) in Lake Baikal. Pike were collected with gill nets and by angling in Chivyrkui Bay in late July-early August 1993 and by gill nets in June 1995. Total length (mm), weight (g), and...
Preliminary study of gill NA+,K+-ATPase activity in juvenile spring chinook salmon following electroshock or handling stress
S. P. VanderKooi, William L. Gale, A.G. Maule
2000, North American Journal of Fisheries Management (20) 528-533
We compared gill Na+,K+-ATPase in subyearling and yearling spring chinook salmon Oncorhynchus tshawytscha 3 h, 24 h, and 7 d after exposure to either a short pulsed DC electroshock (300 V, 50 Hz, 8-ms pulse duration) or an acute handling stress. Mean gill Na+,K+-ATPase values ranged from 7.5 to 11.8...
Sustainability of the Lake Superior fish community: Interactions in a food web context
James F. Kitchell, Sean P. Cox, Chris J. Harvey, Timothy B. Johnson, Doran M. Mason, Kurt K. Schoen, Kerim Aydin, Charles Bronte, Mark Ebener, Michael Hansen, Michael Hoff, Steve Schram, Don Schreiner, Carl J. Walters
2000, Ecosystems (3) 545-560
The restoration and rehabilitation of the native fish communities is a long-term goal for the Laurentian Great Lakes. In Lake Superior, the ongoing restoration of the native lake trout populations is now regarded as one of the major success stories in fisheries management. However, populations of the deepwater morphotype (siscowet...
Lipid concentrations in Lake Michigan fishes: Seasonal, spatial, ontogenetic, and long-term trends
Charles P. Madenjian, Robert F. Elliott, Timothy J. Desorcie, Ralph M. Stedman, Daniel V. O’Connor, Donald V. Rottiers
2000, Journal of Great Lakes Research (26) 427-444
Lipid concentrations were measured in seven species of fish from several locations in Lake Michigan during spring, summer, and fall in 1994 to 1995. Adult alewife (Alosa pseudoharengus) and age-2 coho salmon (Oncorhynchus kisutch) exhibited pronounced seasonal changes in lipid content. Adult alewives averaged 7.4% lipid, on a wet weight...
Reduction in recruitment of white bass in Lake Erie after invasion of white perch
Charles P. Madenjian, Roger L. Knight, Michael Bur, John L. Forney
2000, Transactions of the American Fisheries Society (129) 1340-1353
Recruitment to the adult population of white bass Morone chrysops in Lake Erie sharply declined during the early 1980s. To explain this phenomenon, we formulated the following four hypotheses: (1) the biological characteristics of adult spawners changed during the early 1980s, so that the ability to produce eggs decreased; (2) the decrease...
A new approach toward evaluation of fish bioenergetics models
Charles P. Madenjian, Daniel V. O’Connor, David A. Nortrup
2000, Canadian Journal of Fisheries and Aquatic Sciences (57) 1025-1032
A new approach was used to evaluate the Wisconsin bioenergetics model for lake trout (Salvelinus namaycush). Lake trout in laboratory tanks were fed alewife (Alosa pseudoharengus) and rainbow smelt (Osmerus mordax), prey typical of lake trout in Lake Michigan. Food consumption and growth by lake trout during the...
Trophic ecology of largemouth bass and northern pike in allopatric and sympatric assemblages in northern boreal lakes
Craig A. Soupir, Michael L. Brown, Larry W. Kallemeyn
2000, Canadian Journal of Zoology (78) 1759-1766
Largemouth bass (Micropterus salmoides) and northern pike (Esox lucius) are top predators in the food chain in most aquatic environments that they occupy; however, limited information exists on species interactions in the northern reaches of largemouth bass distribution. We investigated the seasonal food habits of allopatric and sympatric assemblages of largemouth bass...
Inventory and Manage Point Loma Herpetofauna (Reptiles and Amphibians); and secondarily, Shrews, and Macroinvertebrates
S. Weber, Robert N. Fisher
2000, Report
No abstract available at this time...
