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
Karyotypic analyses of twenty-one species of molossid bats (Molossidae: Chiroptera)
Examination of 135 specimens representing 21 species from seven genera of the family Molossidae revealed diploid numbers ranging from 34 to 48. Seventeen species from six genera have diploid numbers of 48. Geographic variation and polymorphism were found only in Eumops glaucinus. Chromosomal variation within the family is presumed to be primarily due to changes in diploid number resulting from Rob
Authors
J. W. Warner, James L. Patton, Alfred Gardner, Robert J. Baker
Parasites of freshwater fishes: a review of their control and treatment
No abstract available.
Authors
Glen L. Hoffman, Fred P. Meyer
Some observations on changes in the Na+ and K+ dependent adenosine triphosphatase activity of gills and kidney associated with the parr-smolt transformation of Atlantic salmon (Salmo salar)
No abstract available at this time
Authors
T.H. McCartney
Studies of reptiles in Rock Valley
No abstract available at this time
Authors
P.A. Medica, D.D. Smith
Movement and recapture of parasitic-phase sea lampreys (Petromyzon marinus) tagged in the St. Marys River and Lakes Huron and Michigan, 1963-67
Recoveries of 477 (11.8%) of 4,048 tagged parasitic-phase sea lampreys showed that lampreys moved extensively and that interchange between the Great Lakes was common. Of 93 recoveries from 2,265 tagged lampreys released below the navigation locks in the St. Marys River, 80 were in Lake Huron, 12 in Lake Superior, and 1 in Lake Erie; of 359 recaptures from 1,666 released in northern Lake Huron, 331
Authors
Harry H. Moore, Frederick H. Dahl, Aarne K. Lamsa
Life history of the spottail shiner (Notropis hudsonius) in southeastern Lake Michigan, the Kalamazoo River, and western Lake Erie
In southeastern Lake Michigan spottail shiners in samples ranged from ages 0 to V, but most were in age groups I-IV. In the Kalamazoo River (a tributary of southeastern Lake Michigan) age group II was commonest in the catches, and no fish older than age IV were sampled. In western Lake Erie, most shiners were in age groups 0-II, and none were older than age IV. Mortality of males was much higher t
Authors
LaRue Wells, Robert House
Control of the sea lamprey (Petromyzon marinus) in Lake Superior, 1953-70
The sea lamprey (Petromyzon marinus) gained entrance into Lake Superior in the early 1940's, and began making drastic inroads on the fish stocks by the early 1950's. Serious efforts to control the parasite began in 1953 with the installation of electrical barriers in streams to block spawning runs. Control measures became much more effective after 1958, when a selective toxicant, the lampricide 3-
Authors
Bernard R. Smith, J. James Tibbles, B. G. H. Johnson
Age, growth, sexual maturity, and food of channel catfish in central Lake Oahe, 1968-69
Channel catfish, Ictalurus punctatus, were collected with gill nets, trawl, and trap nets at three localities in Lake Oahe for the study of year-class strength, growth in length and weight, age composition, sexual maturity, and food. Fish were recruited to all the collection gears at age II. Relatively strong year classes were produced in 1962, 1965, and 1966. Youngest fish were captured in the up
Authors
Victor J. Starostka, William R. Nelson
Reproduction and survivorship of the lizard, Uta stansburiana, and the effects of winter rainfall, density and predation on these processes
No abstract available at this time
Authors
F.B. Turner, P.A. Medica, D.D. Smith
Refined burning prescriptions for Yosemite National Park
No abstract available at this time
Authors
J. W. van Wagtendonk
Analysis of unworked bones
No abstract available at this time
Authors
C. L. Douglas, Matthew Whitman