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Effect of female aging on the morphology and hatchability of resting eggs in the rotifer Brachionus plicatilis Müller


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タイトル: Effect of female aging on the morphology and hatchability of resting eggs in the rotifer Brachionus plicatilis Müller
著者: Kim, Hee-Jin / Hagiwara, Atsushi
発行日: 2011年 3月
出版者: Springer
引用: Hydrobiologia, 662(1), pp.107-111; 2011
抄録: This study examined the morphology and hatchability of Brachionus plicatilis resting eggs as a function of the aging of maternal fertilized mictic females. One-hundred twenty fertilized B. plicatilis (Australian strain) were individually cultured and monitored daily until death. All cultures were maintained at 25°C, 11 ppt, and fed the micro-algae Tetraselmis tetrathele. Resting eggs produced by the females were investigated using two parameters: egg morphology, and hatching rate. Under these culture conditions, females normally produce 1-6 (mean ± SD = 2.7 ± 1.2) resting eggs during their lifetime. However, the number of resting eggs with abnormal morphology increased as a function of maternal age. Among resting eggs with normal morphology (n = 225), 82.2% were produced during the first and second spawning, and had hatching rates of more than 60%, while the hatching rates were below 30% in resting eggs with a spawning order of >2. Thus, the quality of B. plicatilis resting eggs was negatively correlated with maternal age.
キーワード: Aging / Brachionus plicatilis / Hatchability / Resting egg morphology / Rotifera
URI: http://hdl.handle.net/10069/24462
ISSN: 00188158
DOI: 10.1007/s10750-010-0486-2
権利: © Springer Science+Business Media B.V. 2010 / The original publication is available at www.springerlink.com
資料タイプ: Journal Article
原稿種類: author
出現コレクション:080 学術雑誌論文

引用URI : http://hdl.handle.net/10069/24462

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