ＨＣＧ投与による養成マサバ１歳魚からの採卵の試み

DOI 日本農学文献記事索引 Web Site 参考文献12件

書誌事項

タイトル別名
  • Effects of HCG Injections on One-year-old Captive Chub Mackerel Scomber japonicus
  • HCG トウヨ ニ ヨル ヨウセイ マサバ 1サイギョ カラノ サイラン ノ ココロミ
公開日
2007
資源種別
journal article
DOI
  • 10.11233/aquaculturesci1953.55.17
公開者
日本水産増殖学会

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説明

Human chorionic gonadotropin (HCG) was injected to one-year old captive chub mackerel (Scomber japonicus) in June 2005, a timing equivalent to the fish spawning period, to see if fertilized eggs would be formed. The sample fish were accommodated in a net cage and measured for total length, fork length, body length, head length, body depth, body width and body weight every 10 days until 100 days after hatching, then every 30-day thereafter. The sample fish were also checked for ovulation and spermiation by abdominal thrust 280 days after hatching. Their gonadal gland was then removed, weighed and measured for gonad somatic index (GSI) and, for females, KG value. Although spermiation was not confirmed in any males 280 days in age, spermiation was confirmed in half the male fish after 310 days in age and in all the male fish after 340 days in age. For the female fish, no ovulation was observed in individuals 310 days in age, but ovulation was confirmed in 8 out of 10 fish 340 days in age. Five groups of 10 male and 10 female in each received single injection of HCG (200 IU/kg BW) from 360 days in age (1st group) to 376 days in age (5th group) . The fish in four group spawned by the 3 days after the injection. In the group of eggs injected on June 27 (4th group), fertilized eggs were seen, although in a small quantity. When these fertilized eggs were cultured, they were observed to hatch normally and the hatchlings grew successfully.

収録刊行物

  • 水産増殖

    水産増殖 55 (1), 17-22, 2007

    日本水産増殖学会

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