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: 41756
Calomel versus carbarsone
No parasite common to hatchery salmon and trout possesses quite so varied a reputation as does Octomitus salmonis. Discovered, studied, and described independently, but essentially simultaneously, by Dr. Emmeline Moore and Dr. H. S. Davis,
Octomitus salmonis was introduced to fish culture during the early twenties. This easily found and widely distributed parasite, once recognized, was soon held r
Authors
F. F. Fish, D.L. McKernan
Formalin for external protozoan parasites: A report on the prevention and control of Costia necatrix
The smallest and most destructive of the ectoparasitic protozoans infecting salmon and trout, Costia necatrix, has unfortunately been relegated to virtual obscurity during the past few years. Few references to this parasite can be found in the recent literature and, where such things are discussed, one seldom hears a mention of Costia necatrix.
This apparent lack of interest in Costia certainly do
Authors
Frederick S. Fisher
Birds as a factor in controlling insect depredations
No abstract available.
Authors
C. Cottam, F.M. Uhler
Traumatic autotransplantation of splenic tissue with a report on three cases in the dog
No abstract available.
Authors
W.H. Armstrong
Tagging experiments with lake trout, whitefish, and other species of fish from Lake Michigan
A total of 2,902 Lake Michigan fish was tagged and released, 48.8 per cent of which were lake trout and 85 per cent lake trout, lake herring, and whitefish. A total of 388 fish or 13.4 per cent was recaptured. The percentages of returns indicated a tremendous fishing intensity for lake trout, whitefish, and sturgeon. About 81 per cent of the recaptured fish were retaken within a radius of 25 miles
Authors
Oliver H. Smith, John Van Oosten
Scyphidia micropteri, a new protozoan parasite of largemouth and smallmouth black bass
A small urn‐shaped peritrichous protozoan, apparently an undescribed species, was found on the gills and bodies of largemouth and smallmouth black bass in ponds at Leetown, West Virginia. A heavy mortality among a lot of fingerling largemouth bass probably resulted from suffocation due to the organisms on the gills. Specimens of the parasite, preserved in formalin, measured about 57 microns in len
Authors
E. W. Surber
Neascus infection of black-head, blunt-nosed, and other forage minnows
Black‐head, blunt‐nosed, and other minnows were found infested with encysted flatworms in ponds at Leetown, West Virginia. The mortality in a 2.2‐acre pond stocked with 100,000 black‐head minnows was about 250 per day during four weeks of observation. Heavy infestations caused sterility in the minnows. The cyst and parasite are described briefly and the probable life cycle given, followed by certa
Authors
G. E. Klak
The age, growth, and feeding habits of the whitefish Coregonus clupeaformis (Mitchell), of Lake Champlain
This study is based on 120 whitefish collected in northern Lake Champlain (Missisquoi Bay) in 1930 and on 175 whitefish taken in southern Lake Champlain in 1931. Since the whitefish population had not been exploited commercially after 1912 in United States waters and after 1915 in Canadian waters, its study should be of interest in showing the characteristics of a population practically untouched
Authors
John Van Oosten, Hilary J. Deason