Induced Gonadal Development and Spawning of Immature Red Sea Bream Pagrus major with LHRH-a Administration in Different Ways during Winter Season

• Matsuyama Michiya

  Faculty of Agriculture, Kyushu University

• Takeuchi Hiroyuki

  Yaeyama Station of Japan Sea-Farming Association

• Kashiwagi Masaaki

  Faculty of Bioresources, Mie University

• Hirose Keiji

  National Research Institute of Fisheries Science

• Kagawa Hirohiko

  National Research Institute of Aquaculture

書誌事項

タイトル別名

• Induced Gonadal Development and Spawning of Immature Red Sea Bream <i>Pagrus major</i> with LHRH-a Administration in Different Ways during Winter Season
• Induced Gonadal Development and Spawnin

抄録

The response of sexually regressed red sea bream Pagrus major to LHRH-a (des Gly¹⁰-[D-Ala⁶] LHRH ethylamide) was investigated during the non-spawning season, from November to December. Fifty-five fish were divided into five groups and the following treatments were accomplished: initial and final controls (not treated), LHRH-a 200 μg cholesterol pellet (group CP 200), LHRH-a 1 μg/day osmotic pump (group OP 1), and LHRH-a 5 μg/day osmotic pump (group OP 5). In all females in the three experimental groups, gonadal maturation and spawning were induced 12 to 14 days after implantation. The cumulative amounts of LHRH-a released from each mold during the period from pellet or pump implantation were about 11 μg (CP 200), 14 μg (OP 1), and 60 μg (OP 5), respectively. These results suggest that all treatments of LHRH-a were found to be equipotent in inducing red sea bream females to mature and spawn. It seems that the amounts of sustaining release of LHRH-a from LHRH-a 200 μg cholesterol pellet are enough to induce ovarian maturation, and a higher dosage of LHRH-a is not necessary. On the contrary, every treatment of LHRH-a showed insufficient effects on testicular maturation, and the possible cause was discussed. The results of the present study may be used as a basis for producing eggs and fingerlings all year round.

収録刊行物

• Ｆｉｓｈｅｒｉｅｓ　ｓｃｉｅｎｃｅ

  Ｆｉｓｈｅｒｉｅｓ　ｓｃｉｅｎｃｅ 61 (3), 472-477, 1995

  公益社団法人 日本水産学会

キーワード

• LHRH-a
• Pagrus major
• spawning
• cholesterol pellet
• osmotic pump
• non-spawning season

詳細情報

• CRID: 1390282679407103488
• NII論文ID: 130003902700
• NII論文ID: 10004862301
• NII書誌ID: AA10993718
• DOI: 10.2331/fishsci.61.472
• COI: 1:CAS:528:DyaK2MXmsFertLk%3D
• NDL書誌ID: 3644391
• ISSN: 09199268
• ISSN: http://id.crossref.org/issn/09199268
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I3644391
• Web Site: https://www.jstage.jst.go.jp/article/fishsci1994/61/3/61_3_472/_pdf
• 本文言語コード: en
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可