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Effect of salinity during resting egg formation and hatching on descendent reproduction in the rotifer Brachionus rotundiformis Tschugunoff


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タイトル: Effect of salinity during resting egg formation and hatching on descendent reproduction in the rotifer Brachionus rotundiformis Tschugunoff
著者: Kim, Hee J. / Hagiwara, Atsushi
発行日: 2011年 6月 7日
出版者: Oxford University Press
引用: Journal of Plankton Research, 33(7), pp.1033-1042; 2011
抄録: This study investigated the effect of salinity experienced during resting egg formation and hatching on the descendents reproduction and on resting egg hatching in the monogonont rotifer Brachionus rotundiformis Tschugunoff. The study was divided into two parts. First, the resting eggs formed at 17 psu were incubated at four salinities (8, 11, 22 and 33 psu) and then the hatchlings were cultured at the same salinities as during incubation. Second, the resting eggs formed at the four salinities were incubated at the same salinities as during their formation, and the hatchlings were cultured at 33 psu. The resting eggs formed at a salinity of 17 psu and incubated at four different salinities showed a higher hatching percentage at lower salinities (8 and 11 psu). When resting eggs were incubated at the same salinities as at formation (8, 11, 22 and 33 psu), the eggs showed no significant differences in a total hatching rate among treatments (83.386.7). There was no significant difference in population growth when hatchlings did not experience a change in salinity. However, the population growth of hatchlings at 8 psu was comparatively arrested and at 33 psu caused by the acute increase in salinity. With regard to sexual reproduction, rotifers showed different patterns that were associated with the salinity experienced during resting egg hatching. This study shows that the salinity experienced during resting egg formation is the optimal one for egg hatching. Moreover, the salinity experienced during resting egg hatching strongly affects the descendents sexual reproduction more than the salinity experienced during egg formation.
URI: http://hdl.handle.net/10069/27413
ISSN: 01427873
DOI: 10.1093/plankt/fbr004
権利: © The Author 2011. Published by Oxford University Press. All rights reserved. For permissions, please email: journals.permissions@oup.com / This is a pre-copy-editing, author-produced PDF of an article accepted for publication in Journal of Plankton Research following peer review. The definitive publisher-authenticated version Journal of Plankton Research, 33(7), pp.1033-1042; 2011 is available online at: http://dx.doi.org/10.1093/plankt/fbr004.
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/10069/27413

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