NDLI: Temperature conditions enhancing resting egg production of the euryhaline rotifer Brachionus plicatilis O. F. Müller (Kamiura strain)

Content Provider	Springer Nature Link
Author	Kogane, Takayuki Hagiwara, Atsushi Imaizumi, Keisuke
Copyright Year	1997
Abstract	We examined the effect of low temperature treatment(12°C), followed by transfer to highertemperature (25°C), on resting egg formation ofthe rotifer Brachionus plicatilis, Kamiurastrain. This strain has been mass cultured as livefeed at Kamiura Station (Japan Sea FarmingAssociation) for 9 years at 20°C without theappearance of sexual reproductive stages.After preculture in 20 l of 27‰ seawater at 12°C for 0, 10, 20, and 30 days,rotifers were inoculated into 0.5 l mass cultures andcultured at 25°C for 7–9 days. The inoculationdensities were changed from 20 to 400 ind. ml−1,depending on mixis rate. Condensed and frozen Nannochloropsis oculata was fed to rotifers at thefeeding rate of 0.14 µg (dry weight)rotifer−1day−1. The control was cultured at12°C for the entire 36 day experiment. No mixisappeared and no resting eggs were produced when thelow temperature treatment was 0 or 10 days. However,mixis rates reached 50-60% after 20 or 30 days ofexposure to 12°C. The number of resting eggsproduced in these treatments reached 25,500 about 13 times higher than the control. Our resultssuggest that low temperature stimulated mictic femaleproduction and the transfer to the high temperatureaccelerated resting egg formation. This method may beuseful for producing resting eggs of rotifer strainsthat lack sexual reproduction in the common culturecondition at larval rearing facilities.
Starting Page	167
Ending Page	171
Page Count	5
File Format	PDF
ISSN	00188158
Journal	Hydrobiologia
Volume Number	358
Issue Number	1-3
e-ISSN	15735117
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	1997-01-01
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Ecology Hydrobiology
Content Type	Text
Resource Type	Article
Subject	Aquatic Science

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Preservation of resting eggs of the euryhaline rotifer Brachionus plicatilis O. F. Müller by canning

Effect of Some Pesticides on Reproduction of Rotifer Brachionus plicatilis Müller

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Temperature conditions enhancing resting egg production of the euryhaline rotifer Brachionus plicatilis O. F. Müller (Kamiura strain)

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Temperature conditions enhancing resting egg production of the euryhaline rotifer Brachionus plicatilis O. F. Müller (Kamiura strain)