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January 1, 1951

Decline of the lake trout fishery in Lake Michigan Decline of the lake trout fishery in Lake Michigan

No abstract available.

Authors

Ralph Hile, Paul H. Eschmeyer, George F. Lunger

Ecosystems Mission Area, Great Lakes Science Center

January 1, 1951

Downstream movement of recently transformed sea lampreys, Petromyzon marinus, in Carp Lake River, Michigan Downstream movement of recently transformed sea lampreys, Petromyzon marinus, in Carp Lake River, Michigan

In order to obtain more precise information concerning the downstream movement of recently transformed sea lampreys, a trapping device was operated in the Carp Lake River, Emmet County, Michigan, from October, 1948, to July, 1951. The period of downstream migration typically extends from the latter part of October to the middle of April. It varies, however, from year to year with...

Authors

Vernon C. Applegate, Clifford L. Brynildson

Ecosystems Mission Area, Great Lakes Science Center

January 1, 1951

Decline of the trout fishery in Lake Michigan Decline of the trout fishery in Lake Michigan

Abstract has not been submitted

Authors

Ralph Hile, Paul H. Eschmeyer, George F. Lunger

Ecosystems Mission Area, Great Lakes Science Center

January 1, 1951

The sea lamprey in the Great Lakes The sea lamprey in the Great Lakes

Abstract has not been submitted

Authors

Vernon C. Applegate

Ecosystems Mission Area, Great Lakes Science Center

January 1, 1951

Status of the lake trout fishery in Lake Superior Status of the lake trout fishery in Lake Superior

Abstract has not been submitted

Authors

Ralph Hile, Paul H. Eschmeyer, George F. Lunger

Ecosystems Mission Area, Great Lakes Science Center

January 1, 1951

An aquarium experiment on the American eel as a predator on larval lampreys An aquarium experiment on the American eel as a predator on larval lampreys

The parasitic sea lamprey, Petromyzon marinus, has in recent years spread throughout Lakes Huron and Michigan and is now firmly established in these waters (Applegate, 1949, Mich. Cons., 18 (4): 13-15). Coincident with their spread, the abundance of lake trout, Salvelinus namaycush, has declined in both lakes (Hile, 1949, Trans. Amer. Fish. Soc., 76 (1946): 121-147) and the lake trout as

Authors

Alfred Perlmutter

Ecosystems Mission Area, Great Lakes Science Center

January 1, 1951

Movement and dispersion of a blocked spawning run of sea lampreys in the Great Lakes Movement and dispersion of a blocked spawning run of sea lampreys in the Great Lakes

Abstract has not been submitted

Authors

Vernon C. Applegate, Bernard R. Smith

Ecosystems Mission Area, Great Lakes Science Center

January 1, 1950

Progress report on the sea lamprey program Progress report on the sea lamprey program

Abstract has not been submitted

Authors

James W. Moffett

Ecosystems Mission Area, Great Lakes Science Center

January 1, 1950

A nomograph for the computation of the growth of fish from scale measurements A nomograph for the computation of the growth of fish from scale measurements

Directions are given for the construction and operation of a nomograph that can be employed for the computation of the growth of fish from scale measurements regardless of the nature of the body-scale relationship, so long as that relationship is known. The essential feature of the nomograph that makes rapid calculations possible is a ruler on which the graduations are in terms of length...

Authors

Ralph Hile

Ecosystems Mission Area, Great Lakes Science Center

January 1, 1950