Reproductive Biology of the Starspotted Dogfish Mustelus manazo from Tokyo Bay,Japan

DOI Web Site Web Site 被引用文献13件 参考文献19件
  • Yamaguchi Atsuko
    Department of Fisheries, Faculty of Agriculture, University of Tokyo
  • Taniuchi Toru
    Department of Fisheries, Faculty of Agriculture, University of Tokyo
  • Shimizu Makoto
    Department of Fisheries, Faculty of Agriculture, University of Tokyo

書誌事項

タイトル別名
  • Reproductive Biology of the Starspotted Dogfish <i>Mustelus manazo</i> from Tokyo Bay, Japan
  • Reproductive Biology of the Starspotted

この論文をさがす

抄録

The reproductive biology of the starspotted dogfish Mustelus manazo from Tokyo Bay was examined. The specimens attained their first maturity at 687mm TL (age 3) for malesand 701mm TL (age 3) for females. All specimens over 780mm TL (age 5) for males and over 820mm TL (age 6) for females were fully mature. The gonad index for males reached its minimum during June and July, and maximum ova diameter was the largest in May and June. The fertilized eggs were foundin the uteri by early July, and the largest embryos occurred between May and June. It was assumed thatthe mating, fertilization and parturition occurred during May and June, therefore, the gestation period was estimated at 11-12 months. The litter size increased with total length of the mothers and the fecundity ranged from 2 to 13 embryos. A predominance of males in total number of embryos was observed, but yearly variations were found.

収録刊行物

被引用文献 (13)*注記

もっと見る

参考文献 (19)*注記

もっと見る

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ