Testosterone-LH response and episodic secretion in the male marsupial, Dasyurus viverrinus

The pattern of testosterone-LH secretion, feedback mechanism, and periodicity of release were investigated in the male marsupial eastern quoll. Testosterone secretion is controlled directly by LH and in the wild, the secretion of both are synchronous and show a major peak at breeding time. An invers...

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Bibliographic Details
Published inGeneral and comparative endocrinology Vol. 87; no. 3; pp. 410 - 415
Main Author Bryant, S.L.
Format Journal Article
LanguageEnglish
Published San Diego, CA Elsevier Inc 01.09.1992
Elsevier
Subjects
Animals
Biological and medical sciences
Circadian Rhythm
Dasyurus viverrinus
Feedback
Fundamental and applied biological sciences. Psychology
General aspects. Hormone interactions. Hormone actions on several organ systems. Adaptive reactions
Luteinizing Hormone - metabolism
Male
Marsupialia - physiology
Periodicity
Seasons
Testosterone - metabolism
Vertebrates: endocrinology
Testosterone
Vertebrata
Mammalia
Androgen
Adenohypophyseal hormone
Marsupialia
Biological rhythm
Gonadotropin
Testicular hormone
LH
Endocrine secretion
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Summary:The pattern of testosterone-LH secretion, feedback mechanism, and periodicity of release were investigated in the male marsupial eastern quoll. Testosterone secretion is controlled directly by LH and in the wild, the secretion of both are synchronous and show a major peak at breeding time. An inverse relationship between the secretion of LH and testosterone occurs after castration which supports the hypothesis that a negative feedback mechanism exists between the gonads and the pituitary gland as in other mammals. These hormones fluctuate in a cyclic manner over 24 hr.
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ISSN:0016-6480
1095-6840
DOI:10.1016/0016-6480(92)90048-O