Carp, Ctenopharyngodon idella
In November, 1983, 93 sexually immature and 33 mature grass carp (Ctenopharyngodon idella Val.) were surgically sterilized by clipping the gonaduct or removing a section of the ovaries of testes through a ventral incision between the pelvic girdle and the vent. No mortality occurred from this procedure. After six months (May, 1984), 95.7% of the immature and 100% of the mature grass carp had at least some gonadal tissue regeneration. Fifty-nine percent of the immature fish regenerated a pathway for the eggs or milt to enter the environment. Artificial spawning of the mature female grass carp was 66.7% successful. Over 20,000 fry resulted from the four females that ovulated. Due to the rapid regeneration of functional reproductive tissues, and the extrusion of the viable eggs by surgically altered fish, surgical sterilization was determined to be impractical for producing sterile grass carp for weed control.
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Osborne, John A.
Master of Science (M.S.)
College of Arts and Sciences
Length of Campus-only Access
Masters Thesis (Open Access)
Clippinger, David H., "Surgical Sterilization of Grass Carp (Ctenopharyn godonidella val.)" (1985). Retrospective Theses and Dissertations. 4790.