久效磷对雄性金鱼的生殖毒性研究   总被引：5，自引：0，他引：5  

邴欣  汝少国  姜明  王晓宇 《中国海洋大学学报(自然科学版)》2004,34(1):69-74

分别用0.01，0.1和0．5mg／L的久效磷暴露雄性金鱼，取尾静脉血进行血浆聚丙烯酰胺凝胶电泳和精子超微结构的电镜观察。结果表明，与对照组雄鱼和雌鱼相比，各浓度暴露组均发现了1条特异性蛋白。这条蛋白带在电泳凝胶上的位置与17β-雌二醇诱导雄性金鱼分泌的卵黄原蛋白相同，因而可以认定这条特异性蛋白为卵黄原蛋白；0.01mg/L暴露组金鱼精子质膜局部出现溶解，0．1mg／L暴露组的多数精子细胞质膜溶解并断裂，少量精子颈部中心粒复合体和线粒体溶解。  相似文献   

Toxicity Study of Anti-HABs Agents on Penaeus chinensis     

孙晓霞  张波  俞志明 《海洋通报(英文版)》2001,3(1)

In order to study the effect of anti-HABs agents on Penaeus chinensis, the toxicity experiments on clay, Ca(ClO)2, FeCl3, and AlCl3 to Penaeus chinensis are carried out. The results show that: (1) the clay isn't toxic to Penaeus chinensis; (2) Ca(ClO)2 has no toxicity to Penaeus chinensis at low levels, but has acute and chronic toxicity at high levels; (3) Penaeus chinensis can accumulate Fe and Al. The toxic effect needs further study.  相似文献   

海洋生物监测新技术探索:幼虫变态实验     

吴荣军  张学雷  郑家声  朱明远 《海洋科学进展》2002,20(1):66-71

回顾了近年来海洋环境污染生物监测中的海洋底栖无脊椎动物早期发育和变态阶段的毒性实验的研究进展 ,强调应根据敏感性和代表性水平来选取生物有机体进行生物毒性实验 ,并探讨了运用幼虫变态实验来进行海洋污染监测的可行性  相似文献   

三唑磷对四种水生生物的毒性及安全评价研究   总被引：21，自引：0，他引：21  

周常义  池信才  黄成  陈维权  严重玲 《台湾海峡》2003,22(3):319-324

本文研究了三唑磷对小球藻、卤虫、南美白对虾、泥蚶四种水生生物的急性毒性作用，结果显示，三唑磷对小球藻的48h的EC50为24μg/dm^3,72h的EC50为15μg/km^3；对卤虫的24hLC50为1．64mg／dm^3，48hLC50为0．8mg／dm^3；对南美白对虾仔虾的48hLG0为3．2μg／dm^3，96hLC50为1．1μg/dm^3。；对泥蚶的48hLC50为21．0mg／dm^3，96hLC50为10．2mg／dm^3。三唑磷对小球藻、卤虫、南美白对虾为高毒农药，泥蚶对三唑磷有很强的耐受力。  相似文献   

铜、锌、铅、镉对海洋浮游藻的毒性效应     

宁征  孙秉一  史致丽  郝恩良 《中国海洋大学学报(自然科学版)》1990,(4)

研究了Cu、Pb、Zn、Cd四种重金属离子活度对牟氏角毛藻(Chaetoceros muelleri)、球等边金藻(Isochrysis galbana)、叉边金藻(Dirateria inornate)的毒性效应。藻对重金属的响应曲线包括平台区、阈值、半数效应值、零增长值。对于Cu,三种藻的阈值分别为p~aCu=8.5,p~aCu=8.7,p~aCu=8.9。三种藻的零增长值分别为p~aCu=7.0,p~aCu=7.1,p~aCu=7.3。对于Zn,三种藻的阈值分别为p~aZn=8.0,p~aZn=8.5,p~aZn=9.5。两种藻的零增长值分别为p~aZn=6.3,p~aZn=6.9。对于Pb,二种藻的阈值分别为p~aPb=10.8,p~aPb=9.5:一种藻的零生长值在p~aPb=8.2。对于Cd,三种藻的阈值分别为p~aCd=8.9,p~aCd=10.3,p~aCd=10.5。两种藻的零增长值出现在p~aCd=8.1和p~aCd=8.4。对于牟氏角毛藻,四种重金属的毒性强弱顺序为Pb>Cd>Zn>Cu。对于叉边金藻的毒性顺序为Cd>Pb>Cu>Zn。对于等边金藻的顺序为Cd>Cu>Zn>Pb。  相似文献   

Se(Ⅳ)和Te(Ⅳ)对钝顶螺旋藻的急性毒性和联合毒性          下载免费PDF全文

唐全民  郑文杰  杨芳  白燕  涂芳  郭振江 《海洋科学》2007,31(3):18-21

用化学品对藻类毒性测试的标准试验方法,分别研究了硫属元素Se(Ⅳ)和Te(Ⅳ)单组分对钝顶螺旋藻(Spirulina platensis)的毒性效应,用相加指数法评价了Se(Ⅳ)和Te(Ⅳ)双组分对螺旋藻的联合毒性效应.结果表明,Te(Ⅳ)对螺旋藻的毒性大于Se(Ⅳ),其EC50,96h分别为125.2 mg/L和36.1 mg/L;Se(IV)和Te(Ⅳ)的联合毒性效应为拮抗作用, 其EC50,96h为103.1 mg/L.  相似文献   

Ecosystem models of Scottish sea lochs for assessing the impact of nutrient enrichment   总被引：1，自引：0，他引：1  

Ross  A. H.; Gurney  W. S. C.; Heath  M. R. 《ICES Journal of Marine Science》1993,50(4):359-367

  相似文献   

Ca²⁺、Mg²⁺对凡纳滨对虾仔虾生存的影响   总被引：2，自引：0，他引：2       下载免费PDF全文

周凯  来琦芳  王慧  黄宁宇  么宗利 《海洋科学》2007,31(7):4-7

采用静态急性毒性试验的方法,研究了48h内水质中不同的Ca2 、Mg2 浓度及Ca2 /Mg2 值对凡纳滨对虾(Litopenaeus vannamei)仔虾存活的影响。结果表明,适宜凡纳滨对虾仔虾生存的Ca2 、Mg2 质量浓度分别为30.41～351mg/L和8.72～863mg/L;最适Ca2 /Mg2 值范围为0.15～0.67。  相似文献   

铜对三角褐指藻(Phacodactylum tricornutum)的毒性     

孙秉一  史致丽  崔红 《中国海洋大学学报(自然科学版)》1990,(4)

研究了铜对近岸海水中三角褐指藻的毒性。铜离子活度(a_(cu))的阈值为10~(-9.1)mol/dm~3,此时藻的单位生长率(μ)不受a_(cu)影响;acu使μ降至零时为10~(-7.0)mol/dm~372小时EC_(50)值约为10~(-7.4)mol/dm~3。得出μ与a_(cu)间的线性关系,a_(cu)的范围由阈值至刚大于零生长率所对应的a_(cu)值,可通过线性关系式得出。  相似文献   

Responses of the chaetognath, Sagitta elegans, and larval Pacific hake, Merluccius productus, to spring diatom and copepod blooms in a temperate fjord (Dabob Bay, Washington)     

Julia H. Fulmer  Stephen M. Bollens   《Progress in Oceanography》2005,67(3-4):442

As part of a broader field study examining the potentially deleterious effects of diatoms on planktonic food webs, we examined the abundance, stage composition, diet, and feeding success of the chaetognath, Sagitta elegans, and the abundance and morphometric condition of larval Pacific hake, Merluccius productus. Our objective was to look for a relationship between spring phytoplankton blooms and planktonic predators, as mediated by their copepod prey, with special reference to possible deleterious effects of diatoms. Zooplankton were collected weekly during February–May and in mid-summer of 2002 and 2003 in Dabob Bay, Washington State, USA. S. elegans abundance was high in summer of both years and was higher in spring 2003 than spring 2002. Larval chaetognaths dominated the population in early spring and remained present throughout sampling. S. elegans consumed mostly copepods. The abundance of larval S. elegans was correlated with the abundance of copepodites, although no relationship between chaetognath feeding success and prey abundance was found. Larval Pacific hake abundance was high (1200 larvae per square meter) in late February and early March of 2002 and 2003 and decreased rapidly in late spring. The morphometric condition of M. productus was not significantly related to copepod abundance. These results indicate that any deleterious effects of diatoms on copepod abundance, at the scale seen during spring 2002 and 2003 in Dabob Bay, did not greatly affect the next higher trophic level.  相似文献