Neil Fortner

Publication Date


Advisor(s) - Committee Chair

Robert Hoyt, Donald Bailey, Gary Dillard


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Degree Program

Department of Biology

Degree Type

Master of Science


Goldfish, Carassius auratus (Linnaeus), were used in the study of regeneration in caudal fin amputations. The purpose of this study was to determine the effects of hypophysectomy on caudal fin regeneration and to test the hypothesis that rates of regeneration decrease from the proximal to the distal areas of a fin.

In all instances, hypophysectomy did not prevent regeneration of the caudal fin, although a significantly lower rate of regeneration was noted. Use of Duncan’s Multiple Range Test indicated that no significant differences in regeneration existed between the control and sham groups.

Evidence of a regeneration gradient was shown to exist. Duncan’s Multiple Range Test indicated that proximal fin cuts had a higher rate of regeneration than either the distal or oblique cuts.

Graphic analysis indicated this regeneration gradient to be evident also in the oblique cuts, with respect to dorsal lobe (distal cut) and ventral lobe (proximal cut).

Data from this study indicated caudal fin regeneration in goldfish to be not completely dependent upon the pituitary gland. The role of a dual hormonal-nervous system mechanism governing regeneration was implicated.


Biology | Life Sciences | Marine Biology