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Comparison of low temperature adaptation ability in three native and two hybrid strains of the rotifer Brachionus plicatilis species complex

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タイトル: Comparison of low temperature adaptation ability in three native and two hybrid strains of the rotifer Brachionus plicatilis species complex
著者: Kim, Hee-Jin / Iwabuchi, Mutsumi / Sakakura, Yoshitaka / Hagiwara, Atsushi
発行日: 2017年 1月
出版者: 日本水産学会 / The Japanese Society of Fisheries Science
引用: Fisheries Science, 83(1), pp.65-72; 2017
抄録: The low temperature adaptation ability of five selected strains of the Brachionus plicatilis species complex, i.e., three native strains [ Japanese (NH1L), Australian, German] and two hybrid strains [♀NH1L and ♂Australian (N × A) and ♀NH1L and ♂German (N × G),was investigated in terms of life history traits, reproductive characteristics, and mobility under different thermal conditions (12 and 25 °C). The life history traits of these five strains included a longer lifespan, reproduction period and generation times at 12 °C than at 25 °C, combined with reduced lifetime egg and offspring production. At 12 °C, the intrinsic rate of natural increase was higher in NH1L and N × A strains. Reproductive characteristics determined at 12 °C by batch culture showed active population growth for NH1L and N × G strains, while no resting egg production was observed in all of the strains tested. The ratio of swimming rotifers at 12 °C was monitored every hour for 6 h (short term) and every day for 10 days (long term). In the short-term study there was a 81% ratio of swimming rotifers of the NH1L strain, while other strains exhibited low swimming ratios (<60%). In the long-term study NH1L and two hybrid strains showed a >75% swimming ratio from the initial day of the study. These results suggest that outcrossing of rotifer strains is useful to obtain live food resources for the larviculture of cold water fish.
キーワード: Brachionus plicatilis sp. complex / Low temperature adaptation / Life history / Swimming activity
URI: http://hdl.handle.net/10069/37768
ISSN: 09199268
DOI: 10.1007/s12562-016-1045-1
権利: © Japanese Society of Fisheries Science 2016 / The final publication is available at Springer via http://dx.doi.org/10.1007/s12562-016-1045-1
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/10069/37768



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