Sponsor
Portland State University. Department of Biology
First Advisor
Leonard Simpson
Term of Graduation
Winter 1976
Date of Publication
1-12-1976
Document Type
Thesis
Degree Name
Master of Science (M.S.) in Biology
Department
Biology
Language
English
Subjects
Pacifastacus leniusculus -- Analysis, Pacifastacus leniusculus -- Physiology, Androgens -- Mechanism of action
DOI
10.15760/etd.2387
Physical Description
1 online resource (2, 39 pages)
Abstract
The androgenic glands of the Pacific crayfish, Pacifastacus leniusculus trowbridgii Stimpson, 1859, were studied experimentally and by light and electron microscopy. The androgenic glands proliferate in the spring of the year concurrently with an increase in mitotic activity in the testes. Degeneration of a major portion of the glands occurs in the fall, when spermatogenic activity in the testes is near completion. Cellular development appears to progress from small undifferentiated cells through stages of vacuolization and hypertrophy and terminates with degeneration or lysis. The fine structure of the vacuolated gland cells is indicative of increased metabolic activity and probable hormone secretion. However, experimental manipulation of the glands of P. leniusculus gave no evidence of their presumed endocrine function. A discussion of the similarities of the androgenic glands with other known arthropod endocrine glands is also included.
Rights
In Copyright. URI: http://rightsstatements.org/vocab/InC/1.0/ This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s).
Persistent Identifier
http://archives.pdx.edu/ds/psu/15693
Recommended Citation
Sanders, Larry L., "The Androgenic Glands of the Pacific Crayfish, Pacifastacus leniusculus trowbridgii Stimpson, 1859" (1976). Dissertations and Theses. Paper 2390.
https://doi.org/10.15760/etd.2387
Comments
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