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: 41771
Technique for the application of a streamer-type fish tag
Principal features of the technique are: attachment of the plastic tag by means of a nylon-thread loop prepared in advance of field work; use of a curved surgical needle with cutting edge and a split eye for application of the tag. The procedures for splitting the needle's eye and for applying the tag are described and illustrated by a series of photographs.
Authors
Leonard S. Joeris
Trout fishing in Michigan waters of Lake Superior, 1952
This article has been prepared to present the results of recently completed statistical studies on the fishery in the State of Michigan waters of the lake. The tabulations of production of lake trout and the estimates of levels of fishing pressure and abundance in the various statistical districts have been based on the monthly reports submitted by commercial operators to the Michigan Department
Authors
Ralph Hile
Perch studies in Green Bay
For years the commercial fishermen of southern Green Bay contended that the minimum length of 8 inches for yellow perch in that are should be reduced because (1) the perch population was stunted, incapable of reaching the size of 8 inches in any numbers, and (2) the larger perch tended to desert the southern part of the bay after spawning in may. To throw light on this perennially controversial pr
Authors
Ralph Hile
The movement of tagged lake trout in Lake Superior, 1950-52
A total of 733 native lake trout was tagged at two widely separated localities in Lake Superior; subsequent recaptures numbered 155 fish (21.1 percent) during the year following marking. In October 1950, 116 large lake trout (average total length, 27.3 inches) were tagged near Keweenaw Point, Michigan. Fifteen (12.9 percent) were recovered during the first year at points as far west as the Goose
Authors
Paul H. Eschmeyer, Russell Daly, Leo F. Erkkila
Movement of tagged lake trout in Lake Superior, 1950-1952
A total of 733 native lake trout was tagged at two widely separated localities in Lake Superior; subsequent recaptures numbered 155 fish (21.1 percent) during the year following marking. In October 1950, 116 large lake trout (average total length, 27.3 inches) were tagged near Keweenaw Point, Michigan. Fifteen (12.9 percent) were recovered during the first year at points as far west as the Goose
Authors
Paul H. Eschmeyer, Russell Daly, Leo F. Erkkila
The effect of ether anesthesia on fin-clipping rate
As part of an experimental program to learn the effects of stocking lake trout (Salvelinus namaycush) in Lake Superior, 141, 392 fingerlings were marked at the Charlevoix (Michigan) Station of the U.S. Fish and Wildlife Service in October 1952. The adipose fin was removed from all fish, the right pelvic from the remainder. A random sample of 2, 417 of the fish showed an average total length of 4.0
Authors
Paul H. Eschmeyer
Fluctuations in the fisheries of State of Michigan waters of Green Bay
Green Bay, traditionally a major center of production, has assumed in recent years a position of overwhelming dominance in the commercial fisheries of the State of Michigan waters of Lake Michigan. Within the 4-year period 1945-1948 the commercial take in State of Michigan waters of Green Bay increased from 3,317,000 pounds in 1945 to 7,909,000 pounds in 1948, and it was 7,782,000 poinds in 1949.
Authors
Ralph Hile, George F. Lunger, Howard J. Buettner
Directing the movement of fish with electricity
No abstract available.
Authors
Alberton L. McLain, Willis L. Nielsen
Sea lamprey spawning: Wisconsin and Minnesota streams of Lake Superior
No abstract available.
Authors
Howard A. Loeb
The foods of fur animals of the Patuxent Research Refuge, Maryland
Approximately 300 digestive tracts of fur animals obtained mostly during the winter trapping season and 560 scats from animals live-trapped on the Patuxent Research Refuge near Laurel, Maryland, were analyzed. The resulting data are summarized and a brief description of the area and important habitat types is given. The animals studied include the raccoon, red fox, gray fox, mink, New York weasel,
Authors
L. M. Llewellyn, Francis M. Uhler
Ecological studies of breeding bird populations in northern Maine
No abstract available.
Authors
Robert E. Stewart, John W. Aldrich
Fifty-second Christmas Bird Count. 138. Southern Dorchester County, Md
No abstract available.
Authors
C.S. Robbins