Temporal responsiveness of the ovary of goldfish to gonatropin
作者:
R. E. Peter,
C. R. Paulencu,
B. Breton,
期刊:
Journal of Interdisciplinary Cycle Research
(Taylor Available online 1982)
卷期:
Volume 13,
issue 3
页码: 229-239
ISSN:0022-1945
年代: 1982
DOI:10.1080/09291018209359781
出版商: Taylor & Francis Group
关键词: goldfish;gonadotropin;gonad responsiveness;gonad recrudescence
数据来源: Taylor
摘要:
Female goldfish were acclimated to an 8 h light photoperiod and 14–15°C, and, in separate experiments, injected daily for 18 and 14 days with low doses of a partially purified salmon gonadotropin (sGtH) or a highly purified carp gonadotropin (cGtH), respectively at either the onset of light, or 4 or 8 h after the onset of light. The response to GtH injection was measured by the gonadosomatic index (GSI) and by histoiogical analyses of oocy te development. There was a response to sGtH injected at 8 h and to cGtH at 4 h and 8 h after the onset of light. Female goldfish acclimated to a 16 h light photoperiodand injected with low doses of cGtH at either the onset of light or at 4, 8, 12 or 16 h after the onset of light for 14 days had an increased GSI in response to the cGtH injected at 12 h after the onset of light. These results demonstrate that there is a daily variation in responsiveness of the ovary of goldfish to GtH.
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