Gender Specific Spawning Migration in American Shad
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Authors
Early, Heidi
Issue Date
1992
Type
Thesis
Language
en_US
Keywords
Alternative Title
Abstract
American shad, Alosa sapidissima, were
captured in set gill nets and in drift nets in the
Cape Fear River system, North Carolina. The
presence of three dams on the Cape Fear River was
considered as a possible barrier to spawning
migration. Anadromous fish were tagged with
ultrasonic transmitters, and their migration habits
were monitored by periodic relocation . One
shortnose sturgeon and one american shad were
relocated at lock and dam #1 and observed
meandering in the vicinity of the dam for extended
periods after making directed migrations upstream
until reaching the barrier. Neither fish ever
successfully crossed the dam. Shad locking began
March 23, 1992 and ended May 1, 1992. This
schedule could inhibit passage of shad present at
dam#1 as early as mid February. Male shad were
determined to initiate migration earlier in the
season than female shad, and this difference in
migration timing necessitates alteration of the
existing shad locking schedule toward one which
would more broadly encompass the spawning
migration of the entire shad population.
Description
38 p.
Citation
Publisher
Kalamazoo College
License
U.S. copyright laws protect this material. Commercial use or distribution of this material is not permitted without prior written permission of the copyright holder.