Induction of Ovarian Maturation and Ovulation in Cultured Tiger Puffer Takifugu rubripes by Different Hormonal Treatments.
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- MATSUYAMA Michiya
- 九州大学農学部
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- CHUDA Hisashi
- 長崎県水産試験場増養殖研究所
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- IKEDA Yoshihiro
- 長崎県水産試験場島原分場
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- TANAKA Hiroyuki
- 九州大学農学部
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- MATSUURA Shuhei
- 九州大学農学部
Bibliographic Information
- Other Title
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- 各種ホルモン投与法により誘起された養成トラフグの成熟,排卵過程
- カクシュ ホルモン トウヨホウ ニ ヨリ ユウキサレタ ヨウセイ トラフグ ノ
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Abstract
The changes in ovarian development during final oocyte maturation and ovulation induced by different hormonal treatments in cultured tiger puffer Takifugu rubripes were monitored by ovarian biopsy. Single implantation of LHRH-a (des-G1y10 [D-Ala6] -LHRH ethylamide) cholesterol pellet (LHRH-a 400, μg/kg) or osmotic pump (LHRH-a 50 μg/day/fish for 2 weeks) successfully induced ovarian maturation and ovulation in three-year-old cultured tiger puffer with yolk-laden oocytes. Repeated injections of HCG (500 IU/kg) combined with chum salmon pituitary (SP) homogenate (7 mg/kg) every 5 days also induced ovarian maturation and ovulation. Overall, the mean time span from the beginning of hormonal treatment of fish with initial oocyte size between 800 and 900 μm in diameter to ovulation was 18.8 days. In contrast, the mean time span in fish with initial oocyte size over 900μm in diameter was 10.6 days. Oocytes in the control fish receiving no hormones did not develop and became atretic. The results obtained indicate that a single implantation of LHRH-a cholesterol pellet is efficient for inducing maturation and ovulation of cultured tiger puffer. Also, the monitoring of initial oocyte diameter by ovarian biopsy was found to be important for achieving synchronous spawning of several fish.
Journal
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- Aquaculture Science
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Aquaculture Science 45 (1), 67-73, 1997
Japanese Society for Aquaculture Science
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Details 詳細情報について
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- CRID
- 1390001204715223424
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- NII Article ID
- 10004771643
- 10016514058
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- NII Book ID
- AN00124667
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- COI
- 1:CAS:528:DyaK2sXisFCnur4%3D
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- ISSN
- 21850194
- 03714217
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- NDL BIB ID
- 4161530
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- Text Lang
- ja
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- Data Source
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- JaLC
- IRDB
- NDL
- CiNii Articles
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- Abstract License Flag
- Disallowed