RRC ID 4864
著者 Shibata TF, Sato A, Oji T, Akasaka K.
タイトル Development and growth of the feather star Oxycomanthus japonicus to sexual maturity.
ジャーナル Zoolog Sci
Abstract Crinoids, including feather stars, are the most basal group among extant echinoderm classes and share a basic body plan. In spite of their importance for evolutionary developmental study, information on the development of crinoids has been limited, because there are not many species whose spawning season is known, and artificial spawning is impossible. Therefore, it is not easy to obtain fertilized eggs of crinoids. We have observed the spawning and development of the feather star Oxycomanthus japonicus for 7 years. We have established a cultivation system that has enabled us to culture large numbers of O. japonicus from eggs through to sexually mature adults. In the present study, we show that (1) individuals take 2 years to reach sexual maturity; (2) the skeleton of the theca of a stalked juvenile consists of five orals, five basals, five radials, five infrabasals, and an anal plate; and (3) the onset of spawning has shifted by about two weeks since 60 years ago. Our cultivation system can provide enough embryos, larvae, juveniles, and adults for further experiments, extending the possibilities for crinoid research.
巻・号 25(11)
ページ 1075-83
公開日 2008-11-1
DOI 10.2108/zsj.25.1075
PMID 19267619
MeSH Animals Echinodermata / growth & development* Echinodermata / physiology Echinodermata / ultrastructure Female Male Reproduction / physiology Sexual Maturation / physiology*
IF 0.843
引用数 19
WOS 分野 ZOOLOGY
リソース情報
カタユウレイボヤ・(ニッポンウミシダ) O. japonicus