Effects of castration and androgen treatment on aromatase activity in the brain of mature male Atlantic salmon ( Salmo salar L.) parr
Brain homogenates from male Atlantic salmon parr aromatized tritiated androstenedione to estrogens. The aromatase activity in homogenates of whole brains from castrated male parr was lower than that in homogenates from sham-operated male parr in autumn. This was also found in homogenates of the tele...
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Published in | General and comparative endocrinology Vol. 82; no. 1; pp. 86 - 92 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
San Diego, CA
Elsevier Inc
01.04.1991
Elsevier |
Subjects | |
Online Access | Get full text |
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Summary: | Brain homogenates from male Atlantic salmon parr aromatized tritiated androstenedione to estrogens. The aromatase activity in homogenates of whole brains from castrated male parr was lower than that in homogenates from sham-operated male parr in autumn. This was also found in homogenates of the telencephalon and diencephalon, but not in homogenates of the tectum opticum. Treatment of castrated males with testosterone (T) and 11-ketoandrostenedione (OA) increased the aromatase activity in whole brains. T, but not OA, also significantly increased aromatase activity in all brain parts. In spring, half a year after the peak breeding period, mature pan males had a lower aromatase activity in telencephalon, diencephalon and tectum than that found in castrated males in autumn, whereas immature males displayed an even lower level of activity. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 0016-6480 1095-6840 |
DOI: | 10.1016/0016-6480(91)90299-L |