Application of rotifer Brachionus plicatilis in detecting the toxicity of harmful algae |
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| Authors: | Yan Tian Wang Yunfeng Wang Liping Chen Yang Han Gang Zhou Mingjiang |
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| Institution: | (1) Key Laboratory of Marine Ecology and Environmental Science, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, China;(2) Graduate School of Chinese Academy of Sciences, Beijing, 100039, China |
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| Abstract: | The toxicity of seven major HAB (harmful algal bloom) species/strains, Prorocentrum donghaiense, Phaeocystis globosa, Prorocentrum micans, Alexandrium tamarense (AT-6, non-PSP producer), Alexandrium lusitanicum, Alexandrum tamarense (ATHK) and Heterosigma akashiwo were studied against rotifer Brachionus plicatilis under laboratory conditions. The results show that P. donghaiense, P. globosa, P. micans, A. tamarense (AT-6), or A. lusitanicum could maintain the individual survival and reproduction, as well as the population increase of the rotifer, but the individual
reproduction would decrease when exposed to these five algae at higher densities for nine days; H. akashiwo could decrease the individual survival and reproduction, as well as population increase of the rotifer, which is similar
to that of the starvation group, indicating that starvation might be its one lethal factor except for the algal toxins; A. tamarense (ATHK) has strong lethal effect on the rotifer with 48h LC50 at 800 cells/mL. The experiment on ingestion ability indicated by gut pigment change shows that P. donghaiense, P. globosa, P. micans, A. tamarense (AT-6) and A. lusitanicum can be taken by the rotifers as food, but A. tamarense (ATHK) or H. akashiwo can be ingested by the rotifers. The results indicate that all the indexes of individual survival and reproduction, population
increase, gut pigment change of the rotifers are good and convenient to be used to reflect the toxicities of HAB species.
Therefore, rotifer is suggested as one of the toxicity testing organisms in detecting the toxicity of harmful algae.
Supported by the Knowledge Innovation Program of Chinese Academy of Sciences (No. KZCX2-YW-208), National Natural Science
Foundation of China (No. 40821004, U0733006) and National Basic Research Program of China (973 Program, No. 2001CB409700) |
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| Keywords: | Keyword" target="_blank">Keyword rotifer Brachionus plicatilis harmful algae toxicity |
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