Publications
This list of publications includes peer-review journal articles, official USGS publications series, reports and more authored by scientists in the Ecosystems Mission Area. A database of all USGS publications, with advanced search features, can be accessed at the USGS Publications Warehouse.
Filter Total Items: 41918
Migration of birds in North Dakota during fall 1974
Abstract has not been submitted
Authors
J. T. Lokemoen, D. H. Johnson
Breeding bird populations of selected grasslands in east-central North Dakota -- 1975 - Kentucky blue grass prairie and mixed prairie I-V
Abstract has not been submitted
Authors
D. H. Johnson
Predation by fish on walleye eggs on a spawning reef in western Lake Erie, 1969-71
Nearly 2,000 fish representing 21 species were captured with experimental gillnets on Kelleys Island Shoal during the spawning and incubation periods of walleyes (Stizostedion v. vitreum) in 1969-71. A total of 794 stomachs were examined. Four species contained walleye eggs: yellow perch (Perca flavescens), spottail shiner (Notropis hudsonius), stonecat (Noturus flavus) and white sucker (Catostomu
Authors
David R. Wolfert, Wolf-Dieter N. Busch, Carl T. Baker
Life histories and abundance of crustacean zooplankton in the outlet of Lake Superior, 1971-72
In sampling throughout a year, at about 3-wk intervals, of the crustacean zooplankton discharged from Lake Superior through the St. Marys River, 30 species were collected, including three not previously recorded for the lake: the copepod Cyclops strenuus, and the cladocerans Alona costata and Alonella acutirostris. Five copepods, Cyclops bicuspidatus thomasi, Diaptomus ashlandi, D. sicilis, Limnoc
Authors
James H. Selgeby
Phallodrilus hallae, a new tubificid oligochaete from the St. Lawrence Great Lakes
The predominantly marine tubificid genus Phallodrilus is defined, a key to its nine species constructed, and an illustrated description of Phallodrilus hallae n. sp. from the St. Lawrence Great Lakes presented. The species is distinguished from other members of the genus by its well-developed atrial musculature, extensions of which ensheath the posterior prostatic ducts.Phallodrilus hallae n. sp.
Authors
David G. Cook, Jarl K. Hiltunen
Annual contribution of carbon, nitrogen, and phosphorus by migrant Canada geese to a hardwater lake
Each year more than 6,000 migrant Canada geese (Branta canadensis interior Todd) rest for 3 to 10 days during the months of March, October, November, and December on Wintergreen Lake, a productive 15 ha (33 acre) hardwater lake in the W. K. Kellogg Bird Sanctuary of Michigan State University in southwestern Michigan. For the past six years accurate weekly counts have been made of resident and migr
Authors
Bruce A. Manny, Robert G. Wetzel, W.C. Johnson
Environmental factors affecting the strength of walleye (Stizostedion vitreum vitreum) year-classes in western Lake Erie, 1960-70
Commercial production of walleyes (Stizostedion vitreum vitreum) from western Lake Erie declined from 5.9 million pounds in 1956 to 140,000 pounds by 1969. Since 1956, marked irregularity in year-class success has developed. Only four year-classes were considered good during 1959–70. The rate and regularity of water warming during the spring spawning and incubation periods in 1960–70 had a positiv
Authors
Wolf-Dieter N. Busch, Russell L. Scholl, Wilbur L. Hartman
Effect of different constant incubation temperatures on egg survival and embryonic development in lake whitefish (Coregonus clupeaformis)
Eggs of lake whitefish (Coregonus clupeaformis) were incubated in a constant-flow incubator at constant temperatures of 0.5, 2.0, 4.0, 5.9, 7.8, and 10.0 C. The time from fertilization to median hatch was inversely related to temperature, and ranged from 41.7 days at 10.0 C to 182 days at 0.5 C. The percentage hatch was highest (70.9-73.3%) at 4.0, 5.9, and 7.8 C, and was greatly reduced (6.0-28.4
Authors
L.T. Brooke
Dieldrin in the diet of channel catfish (Ictalurus punctatus): uptake and effect on growth
Fingerling channel catfish (Ictalurus punctatus) were given diets containing 0, 0.4, 0.8, or 4.0 I?g dieldrin/g of food (dry weight) for 210 days, followed by a dieldrin-free diet for 56 days. Catfish receiving 4.0 I?g dieldrin/g food gained about 17% less weight than the control fish in 210 days and about 35% less weight during the last 126 days of the 210-day period. No growth differences were a
Authors
Ray L. Argyle, George C. Williams, Clara B. Daniel
A collection of reptiles and amphibians from the Chaco of Paraguay
No abstract available at this time
Authors
N. J. Scott, J.W. Lovett
A comparison of observer and camera counts of desert bighorn sheep
No abstract available at this time
Authors
C. L. Douglas
An evaluation of attempts to reestablish sea otters in Oregon
No abstract available at this time
Authors
R.J. Jameson