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
Effects of temperature on electrolyte balance and osmoregulation of the alewife (Alosa pseudoharengus) in fresh and sea water
A study of the effects of temperature and salinity on ionoregulation in the alewife, Alosa pseudoharengus, revealed that concentrations of sodium, potassium, and calcium in plasma and muscle were similar in fish adapted to fresh water and those adapted to sea water. The non-stressed alewife is apparently an excellent ionoregulator in both environments.
Acute exposure to cold caused a shift in plas
Authors
Jon G. Stanley, Peter J. Colby
Population biology of lake trout (Salvelinus namaycush) of Lake Superior before 1950
Scale samples collected in 1948 were used to estimate the instantaneous total mortality rate (0.70) and growth for lake trout (Salvelinus namaycush) in Lake Superior before the population had been significantly reduced by the sea lamprey (Petromyzon marinus). Indirect evidence indicates that the instantaneous natural mortality rate was probably 0.10–0.25. The Ricker model was used to calculate yie
Authors
Gary T. Sakagawa, Richard L. Pycha
Plotting of bathythermograph transect data on a printer
A program for plotting bathythermograph transect data on a computer (IBM 1130) printer is available from the Great Lakes Fishery Laboratory. Temperature values are printed in positions proportional to their depths and distances from shore. Contour lines are drawn manually through the plotted points.
Authors
James B. Reynolds, Douglas R. McLain
Seasonal distribution of zooplankton in the northern basin of Lake Chad
More than 300 pairs of fine and coarse mesh plankton net samples were collected in the northern basin of Lake Chad during an 18-month period, June 1967 to November 1968. The seasonal distribution and abundance of the dominant species of Rotifera and Crustacea are given in addition to a general description of the hydrology and circulation of the northern basin of the lake. The composition and abund
Authors
A.H. Robinson, Patricia K. Robinson
Blood cell lineage in the sea lamprey, Petromyzon marinus (Pisces: Petromyzontidae)
Blood cell types of the sea lamprey, Petromyzon marinus, are described and identified and the lineage of mature circulating cells in peripheral blood is traced to blast cells in the hematopoietic fat body. The fat body appears to be the phylogenetic precursor of bone marrow in higher forms, since blood cells originate and begin maturation in this tissue. Experimental animals were injected first wi
Authors
George W. Piavis, James L. Hiatt
Alewife dieoffs: Why do they occur?
Periodid midwinter, early spring, and summer mortalities of alewives (Alosa pseudoharengus) have been common in the Great Lakes since the first appearance of the silvery marine invader in Lake Ontario in the mid-1870's. In 1967 a nationally publicized dieoff of tremendous magnitude (estimated at several hundred million pounds of fish) in Lake Michigan resulted in losses to industry,municipalities
Authors
Peter J. Colby
Giant American brook lampreys, Lampetra lamottei, in the upper Great Lakes
Five female American brook lampreys, Lampetra lamottei, collected in lakes Michigan and Huron averaged nearly twice as long and about six times as heavy as American brook lampreys of normal size. Three factors suggested that the giant lampreys may have fed parasitically after metamorphosis: morphological adaptations of the species for parasitic life, their large size, and absence of extremely larg
Authors
Patrick J. Manion, Harold A. Purvis
Albinism in lampreys in the upper Great Lakes
Albinism in fishes is relatively rare except in some stocks of hatchery-reared salmonids. In the Petromyzonidae, only four albino lampreys have been reported.
Authors
Robert A. Braem, Everett L. King
Ship canals and aquatic ecosystems
Through a combination of ecosystem homeostasis and the perversity of man and nature, oftentimes the significant biological changes effected by environmental modifications are not detected until long after the initial change has taken place. The immediate impact, which may range from the spectacular to the undetectable, is a deceptive measure of the long-term and often more important changes in the
Authors
William I. Aron, Stanford H. Smith
Review of: Fish, amphibian and reptile remains from archaeological sites, Part 1: Southeastern and southwestern United States
No abstract available at this time
Authors
C. L. Douglas
Lizard sampling techniques
No abstract available at this time
Authors
P.A. Medica, G.A. Hoddenbach, J.R. Lannom