| Toxic effect of dinoflagellate Alexandrium species on Cladocera Moina mongolica Daday |
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| 作者姓名： | YAN Tian CHEN Taoying ZHOU Mingjiang |
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| 作者单位： | YAN Tian,ZHOU Mingjiang(Institute of Oceanology,Chinese Academy of Sciences,Qingdao 266071,China);CHEN Taoying(Institute of Oceanology,Chinese Academy of Sciences,Qingdao 266071,China;College of Fisheries and Life Science,Shanghai Ocean University,Shanghai 201306,China) |
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| 基金项目： | The Chinese Academy of Sciences Innovation Project under contract No. KZCX2-YW-208; the National Nature
Science Foundation of China under contract No. U0733006; the National Basic Research Priorities Programme under contract No.
2010CB428700; the Leading |
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| 摘 要： | The main objective of this study was to investigate toxic effects of the dinoflagellate Alexandrium species,on cladocera Moina mongolica in the laboratory.Ten strains of Alexandrium species,including Alexandrium tamarense(AT-6,ATHK,ATCI02,ATCI03 and AT5-1),A.catenella(ACDH),A.affine(AC-1 and AS-1),A.lusitanicum and A.minutum were tested.The results showed that A.tamarense(ATHK,ATCI02 and AT5-1) and A.affine(AC-1 and AS-1),but not A.tamarense(AT-6 and ATCI02),A.catenella(ACDH),A.lusitanicum and A.minutum had significantly negative effects on the survival of M.mongolica;when exposed to these ten strains of Alexandrium species in densities of 3 000 cells/cm 3 for 7 d,respecyively.M.mongolica could feed on A.tamarense(AT-6,ATHK,ATCI02,ATCI03 and AT5-1),A.catenella,A.lusitanicum and A.minutum,but exhibited little or no grazing on A.affine(AC-1 and AS-1),based on the changes in gut pigment after exposure to alga for 1 and 12 h.A.affine AC-1,which had the strongest toxicity on the survival of M.mongolica,was chosen to further study the negative effects on M.mongolica.The results showed that the effect of A.affine AC-1 on the survival of M.mongolica was density-dependent,and its lethal effects on one-day,two-day and three-day old M.mongolica were exacerbated with increasing age;The whole algal culture,re-suspended algal cells,cell fragments and cell contents all had adverse impacts on the survival of M.mongolica.Moreover,both juvenile numbers and life-span time of M.mongolica were decreased significantly when they were cultured in A.affine AC-1 of 10 and 50 cells/cm 3 ,combined with 3 × 10 6 cells/cm 3 of Chlorella spp.,respectively.As a non-PSP producer,A.affine may produce other toxins,responsible for the strong negative effects on M.mongolica.
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| 关 键 词： | 亚历山大藻 蒙古裸腹 毒性效应 枝角类 物种 |
| 收稿时间： | 4 November 2004 |
| 修稿时间： | 4/7/2009 12:00:00 AM |
Toxic effect of dinoflagellate Alexandrium species on Cladocera Moina mongolica Daday |
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| YAN Tian,CHEN Taoying,ZHOU Mingjiang.Toxic effect of dinoflagellate Alexandrium species on Cladocera Moina mongolica Daday[J].Acta Oceanologica Sinica,2010,29(2):120-126. |
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| Authors: | YAN Tian CHEN Taoying and ZHOU Mingjiang |
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| Institution: | 1.Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China2.Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;College of Fisheries and Life Science, Shanghai Ocean University, Shanghai 201306, China |
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| Abstract: | The main objective of this study was to investigate toxic effects of the dinoflagellate Alexandrium
species, on cladocera Moina mongolica in the laboratory. Ten strains of Alexandrium species, in-
cluding Alexandrium tamarense (AT-6, ATHK, ATCI02, ATCI03 and AT5-1), A. catenella (ACDH),
A. affine (AC-1 and AS-1), A. lusitanicum and A. minutum were tested. The results showed that
A. tamarense (ATHK, ATCI02 and AT5-1) and A. affine (AC-1 and AS-1), but not A. tamarense
(AT-6 and ATCI02), A. catenella (ACDH), A. lusitanicum and A. minutum had significantly neg-
ative effects on the survival of M. mongolica; when exposed to these ten strains of Alexandrium
species in densities of 3 000 cells/cm3 for 7 d, respecyively. M. mongolica could feed on A. tamarense
(AT-6, ATHK, ATCI02, ATCI03 and AT5-1), A. catenella, A. lusitanicum and A. minutum, but
exhibited little or no grazing on A. affine (AC-1 and AS-1), based on the changes in gut pigment af-
ter exposure to alga for 1 and 12 h. A. affine AC-1, which had the strongest toxicity on the survival
of M. mongolica, was chosen to further study the negative effects on M. mongolica. The results
showed that the effect of A. affine AC-1 on the survival of M. mongolica was density-dependent,
and its lethal effects on one-day, two-day and three-day old M. mongolica were exacerbated with
increasing age; The whole algal culture, re-suspended algal cells, cell fragments and cell contents
all had adverse impacts on the survival of M. mongolica. Moreover, both juvenile numbers and
life-span time of M. mongolica were decreased significantly when they were cultured in A. affine
AC-1 of 10 and 50 cells/cm3, combined with 3×106 cells/cm3 of Chlorella spp., respectively. As a
non-PSP producer, A. affine may produce other toxins, responsible for the strong negative effects
on M. mongolica. |
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| Keywords: | red tides Alexandrium species Moina mongolica Daday toxic effect |
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