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January 1, 1962

Use of mobile bioassay equipment in the chemical control of sea lamprey Use of mobile bioassay equipment in the chemical control of sea lamprey

No abstract available.

Authors

John H. Howell, William M. Marquette

Ecosystems Mission Area, Great Lakes Science Center

January 1, 1962

Microorganic constituents of water of the Great Lakes Microorganic constituents of water of the Great Lakes

No abstract available.

Authors

Lloyd L. Kempe, Stacy L. Daniels, Alfred M. Beeton

Ecosystems Mission Area, Great Lakes Science Center

January 1, 1962

An instance of upwelling along the east shore of Lake Michigan An instance of upwelling along the east shore of Lake Michigan

No abstract available.

Authors

James W. Moffett

Ecosystems Mission Area, Great Lakes Science Center

January 1, 1962

Estimation of the brook and sea lamprey ammocoete populations of three streams Estimation of the brook and sea lamprey ammocoete populations of three streams

Marking experiments on three streams in the Upper Peninsula of Michigan yielded quantitative estimates of populations of larval and transforming lampreys. The estimates not only gave an idea as to the numbers of ammocetes in the streams, but also confirmed the judgments of abundance based on earlier surveys with electric-shocking equipment and provided valuable information on the...

Authors

Bernard R. Smith, Alberton L. McLain

Ecosystems Mission Area, Great Lakes Science Center

January 1, 1962

A photoelectric amplifier as a dye detector A photoelectric amplifier as a dye detector

A dye detector, based on a modified photoelectric amplifier, has been planned, built, and tested. It was designed to record automatically the time of arrival of fluorescein dye at predetermined points in a stream system. Laboratory tests and stream trials proved the instrument to be efficient. Small changes in color can be detected in turbid or clear water. The unit has been used...

Authors

Wesley J. Ebel

Ecosystems Mission Area, Great Lakes Science Center

January 1, 1962

Quantitative sampling with the orange-peel dredge Quantitative sampling with the orange-peel dredge

Abstract has not been submitted

Authors

James W. Merna

Ecosystems Mission Area, Great Lakes Science Center

January 1, 1962

The relative efficiency of nylon and cotton gill nets for taking lake trout in Lake Superior The relative efficiency of nylon and cotton gill nets for taking lake trout in Lake Superior

The change from cotton to nylon twine for gill nets in 1949–52 resulted in a sharp increase in the efficiency of the most important gear used for taking lake trout in Lake Superior, and, consequently, biased estimates of fishing intensity and abundance severely.From early May to the end of September 1961, short gangs (2000 or 4000 linear feet) of cotton and nylon nets were fished in...

Authors

Richard L. Pycha

Ecosystems Mission Area, Great Lakes Science Center

January 1, 1962

Exposure of several developmental stages of the sea lamprey, Petromyzon marinus to selective larvicides Exposure of several developmental stages of the sea lamprey, Petromyzon marinus to selective larvicides

No abstract available.

Authors

George W. Piavis

Ecosystems Mission Area, Great Lakes Science Center

January 1, 1962

Distribution and seasonal movements of Saginaw Bay fishes Distribution and seasonal movements of Saginaw Bay fishes

No abstract available.

Authors

Ira A. Carr

Ecosystems Mission Area, Great Lakes Science Center

January 1, 1961

Fishery statistical districts of the Great Lakes Fishery statistical districts of the Great Lakes

No abstract available.

Authors

Stanford H. Smith, Howard J. Buettner, Ralph Hile

Ecosystems Mission Area, Great Lakes Science Center

January 1, 1961

The identification of larval yellow perch, Perca flavescens and walleye, Stizostedion vitreum The identification of larval yellow perch, Perca flavescens and walleye, Stizostedion vitreum

No abstract available.

Authors

Carroll R. Norden

Ecosystems Mission Area, Great Lakes Science Center

January 1, 1961

Factors related to commercial production of the walleye in Red Lakes, Minnesota Factors related to commercial production of the walleye in Red Lakes, Minnesota

Growth of the walleye (Stizostedion vitreum vitreum) in Red Lakes, Minnesota, over a 17-year period was slower than in other waters of the Great Lakes region and fluctuated annually from 30.7 percent above to 42.2 percent below mean growth. Individual year classes varied considerably in growth rate. Age distribution in 3 1/2-inch stretch-measure commercial nets varied extremely in 9...

Authors

Lloyd L. Smith, Richard L. Pycha

Ecosystems Mission Area, Great Lakes Science Center