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DIV. OF FISHES

Synopsis on the Biology of the

Jack Mackerel (Trachurus symmetricus)

By John S. MacGregor

SPECIAL SCIENTIFIC REPORT-FISHERIES No. 526

UNITED STATES DEPARTMENT OF THE INTERIOR

FISH AND WILDLIFE SERVICE

BUREAU OF COMMERCIAL FISHERIES

UNITED STATES DEPARTMENT OF THE INTERIOR

Stewart L. Udall, Secretary

John A. Carver, Jr., Under Secretary

Stanley A. Cain, Assistant Secretary for Fish and Wildlife and Parks
FISH AND WILDLIFE SERVICE, Clarence F. Pautzke, Commissioner
BUREAU OF COMMERCIAL FISHERIES, Donald L. McKernan, Director

Synopsis on the Biology of the Jack Mackerel (Trachurus symmetricus)

By

JOHN S. MacGREGOR

FAO Species Synopsis No. 86

United States Fish and Wildlife Service
Special Scientific Report--Fisheries No. 526

Washington, D.C.
April 1966

6.1 Regulatory (legislative) measures

6.2 Control or alteration of physical features of the environment.

6.3 Control or alteration of chemical features of the environment.

6.4 Control or alteration of the biological features of the environ-

ment ..

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