マダイ雄の性成熟に伴う血中ステロイドホルモン量の変動
書誌事項
- タイトル別名
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- Changes in plasma levels of steroid hormones during sexual maturation of male red seabream Pagrus major.
- マダイ オス ノ セイ セイジュク ニ トモナウ ケッチュウ ステロイド ホル
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Changes of plasma testosterone, 11-ketotestosterone and 17, 20β-dihydroxy-4-pregnen-3-one (17α, 20β-diOHprog) levels were correlated with changes in gonadosomatic index (GSI) and testi-cular histology during the sexual maturation of male red seabream Pagrus major.<br>A sharp increase in the GSI occurred during April, with the increased formation of sperma-tozoa. High GSI values were maintained in May, followed by a sharp drop in June. The values were consistenily low during the remainder of the sampling periods. Plasma testosterone levels were maintained at low levels (below 200pg/ml) from January to March, rapidly increased to 500pg/ml in April and reached a peak of 870pg/ml in May. The levels showed a distinct drop in June, and remained low throughout the remainder of the sampling periods. The profiles and absolute levels of plasma 11-ketotestosterone were almost similar to those of testosterone. 17α, 20β-diOHprog could be detected in plasma throughout the sampling periods, but the levels (about 200pg/ml) were much lower than those of salmonids. There was a slight but significant increase in l7α, 20β-diOHprog levels (350pg/ml) in males collected during early spermiating period (April). However, the levels decreased even during the period of active spermiation (May).
収録刊行物
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- 日本水産学会誌
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日本水産学会誌 54 (4), 593-598, 1988
公益社団法人 日本水産学会
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詳細情報 詳細情報について
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- CRID
- 1390282681391340544
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- NII論文ID
- 130001544415
- 20000539695
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- NII書誌ID
- AN00193422
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- ISSN
- 1349998X
- 00215392
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- NDL書誌ID
- 3187036
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- IRDB
- NDL
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