Publications
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Changes in the bottom fauna of western Lake Erie from 1930 to 1961
Samples were collected at 40 stations in western Lake Erie in 1961 to determine the species composition, distribution, and abundance of macrobenthonic organisms and to document changes since 1930, when a similar survey was made. The fauna in 1961 was composed principally of Oligochaeta, Tendipedidae (7 genera), Sphaeriidae (15 species), and Gastropoda (at least 8 species). Stations with a high den
Authors
John F. Carr, Jarl K. Hiltunen
Synergism of 5,2'dichloro-4'-nitro-salicylanilide and 3-trifluormethyl-4-nitrophenol in a selective lamprey larvicide
No abstract available.
Authors
John H. Howell, Everett L. King, Allen J. Smith, Lee H. Hanson
Lake Michigan chemical data, 1954-55, 1960-61
This report presents without interpretation methods used in and the results of chemical analyses, and supplemental observations of temperatures at depth, transparency, and meteorological conditions for Lake Michigan in 1954, 1955, 1960, and 1961.
Authors
Alfred M. Beeton, James W. Moffett
Bottom sediments of Saginaw Bay, Michigan
Saginaw Bay is a southwest extension of Lake Huron on the east shore of the Southern Peninsula of Michigan. It is a shallow-water derivative of the Pleistocene Lake Saginaw. Sixty-one bottom samples were collected on a semigrid pattern and analyzed physically. Findings were treated statistically. Sediments range in size from large pebbles to clay. Medium- to fine-grained clear quartz sand is commo
Authors
Leonard E. Wood
The taxonomic status of Leucichthys macropterus, a cisco of Lake Erie
No abstract available.
Authors
Stanford H. Smith
Status of the deepwater cisco population of Lake Michigan
The species and size composition and the abundance of the cisco (Leucichthys spp.) population of Lake Michigan have undergone drastic changes since the sea lamprey became established in the 1940's. The changes were measured by the catches of gill nets of identical specifications fished at the same seasons, depths, and locations in 1930-32, 1954-55, and 1960-61. The two largest ciscoes (johannae an
Authors
Stanford H. Smith
The spottail shiner in Lower Red Lake, Minnesota
On the basis of 14,564 spottail shiners (Notropis hudsonius) from Red Lakes, Minnesota, growth rates, strength of year classes, and food utilization were studied. Males and females had different body-scale relationships, and females grew faster than males. There was high correlation between water temperature and growth rate. Strength of year classes was closely related to size of spawning populati
Authors
Lloyd L. Smith, Robert H. Kramer
Age, growth, sex ratio, and maturity of the whitefish in central Green Bay and adjacent waters of Lake Michigan
This study is based on 1,023 whitefish, Coregonus clupeaformis (Mitchill)--819 in seven samples from five localitites in central Green Bay in 1948-49 and 1851-52 and 204 in a single 1948 collection from northwestern Lake Michigan proper. Records of age indicated unusual strength for only one year class--1943 which strongly dominated the 1948 sample from Lake Michigan and the 1949 sample from Green
Authors
Donald Mraz
Age and growth of the round whitefish in Lake Michigan
The round whitefish, though rarely abundant, is widely distributed in northern waters. It is one of the least studied of the coregonines; the present report is but the second for Great Lakes waters. Commercial production in Lake Michigan has been tightly confined to the northern portion. The period 1924-30 showed the best production: 200,000 to 359,000 pounds. Since 1956, production has been aroun
Authors
Donald Mraz
A horizontal sampler for collection of water samples near the bottom
The need to obtain adequate water samples immediately above a lake bottom or at a precisely defined depth is not new. The problem is of particular concern in a large section of central Lake Erie, where dissolved oxygen concentration may be reduced to 1 ppm or less in the hypolimnion and where the metalimnion frequently extends to or within 30 or 60 cm of the bottom (Becton 1963; Cam 1962).It
Authors
Leonard S. Joeris
Anesthetic effect of 4-styrylpyridine on lamprey and fish
The anestheticp roperty of 4-styrylpyridine (4-SP) on fish and lamprey was first noticed during chemical screening search of a selective toxicant for larval lamprey (Applegate, Howell, Hall, and Smith, 1957). To assess the possible value of the compound as an anesthetic, we later conducted the experiments reviewed in this report.
Authors
John H. Howell, Paul M. Thomas