Ovarian development and final oocyte maturation in cultured sevenband grouper Epinephelus septemfasciatus
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- SHEIN NI LAR
- Marine Research Institute, Nagasaki University
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- CHUDA HISASHI
- Nagasaki Prefectural Institute of Fisheries
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- ARAKAWA TOSHIHISA
- Nagasaki Prefectural Institute of Fisheries
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- MIZUNO KAORI
- Marine Research Institute, Nagasaki University
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- SOYANO KIYOSHI
- Marine Research Institute, Nagasaki University
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説明
The histological changes in the ovary of sevenband grouper Epinephelus septemfasciatus were examined during vitellogenesis and final oocyte maturation. Ovaries contained oocytes at the perinucleolus stage at the start of the experiment in January. Oocytes at the primary yolk stage appeared when the gonadosomatic index (GSI) was slightly on the rise in March. After that, vitellogenesis progressed and ovaries contained oocytes at the tertiary yolk stage in May. The GSI increased drastically at the same time. These results suggest that vitellogenesis in sevenband grouper starts or is already in progress in March and is completed by May, In order to clarify the process of final oocyte maturation, luteinizing hormone-releasing hormone (LHRH) analog (des Gly10, [D-Ala6] LHRH ethylamide) was implanted in fish with oocytes at the tertiary yolk stage. The oocytes developed to the migratory nucleus stage in 18 h and reached the maturation stage in 42 h after implantation. This indicates that final oocyte maturation is completed within 42 h after stimulation of gonadotropin-releasing hormone.
収録刊行物
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- Ｆｉｓｈｅｒｉｅｓ ｓｃｉｅｎｃｅ
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Ｆｉｓｈｅｒｉｅｓ ｓｃｉｅｎｃｅ 70 (3), 360-365, 2004
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
- 1390001204427981696
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- NII論文ID
- 130003904075
- 10012363396
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- NII書誌ID
- AA10993718
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- COI
- 1:CAS:528:DC%2BD2cXltlajsrY%3D
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- ISSN
- 14442906
- 09199268
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- NDL書誌ID
- 6974836
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- 本文言語コード
- en
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- データソース種別
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- NDLサーチ
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