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population growth parameter
相关语句
  种群增长参数
     Survival and reproductive rates and population growth parameter of rotifer at each test group was lower than the control group, while R0 changed most distinctly, with its values ranged from 2.4 to 3.8 times lower at test groups as compared to the control group.
     各实验组轮虫的存活率和繁殖率及种群增长参数均低于对照组,其中以R0的改变最明显,对照组是实验组的2.4~3.8倍;
短句来源
  种群增长参数的
     Using clonal culture and through compilation of life tables to calculate intrinsic increase rates (rm), finite increase rates(l), net reproductive rates (R0) and generation times(T), the effects of MC-LR in its concentration of 1~20mg/mL on the rotifer population growth parameter were studied.
     采用克隆培养法,通过编制生命表计算内禀增长率(rm)、周限增长率(l)、净生殖率(R0)和世代时间(T),研究MC-LR的浓度在1~20mg/mL之间对轮虫种群增长参数的影响.
短句来源
  相似匹配句对
     controlling population growth;
     控制人口增长 ;
短句来源
     controlling population growth;
     控制人口增长;
短句来源
     The growth of E.
     重组HBD 2对E.
短句来源
     Scattering Parameter
     散射参数
短句来源
     and b was empirical parameter.
     b为经验常数。
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This paper dealt with the differences of population growth parameters among the polymorphic types in the lady-bird beetle,Harmonia axyridis Pallas.Reared in crowds,these showed the significant differences in developmental and reproductive rates,as well as population survivorship and in- trinsic growth rates under the given conditions. These differences may help to un- derstand the spatio-temporal change of polymorphism frequency distribution in the beetle and adaptation of the polymorphic types...

This paper dealt with the differences of population growth parameters among the polymorphic types in the lady-bird beetle,Harmonia axyridis Pallas.Reared in crowds,these showed the significant differences in developmental and reproductive rates,as well as population survivorship and in- trinsic growth rates under the given conditions. These differences may help to un- derstand the spatio-temporal change of polymorphism frequency distribution in the beetle and adaptation of the polymorphic types to environment,as well as population dvnamics.

本文探讨了异色瓢虫多态类型增长参数的差异。在实验室给定条件下,不同的多态类型在世代发育时间、净繁殖率、存活率和内禀增长力诸方面均存在着明显差异。这样的差异可能有助于理解该物种多态类型频率分布的时空变化、不同类型对环境的适应以及种群动态规律。

According to the monitoring data of fishery resources in the middle and upper reaches of the Yangtze River in 1996-1999, this paper deals with the fishery biological characteristics of ten species of major commercial fishes. The population growth parameters(K, L ∞, W ∞),total mortality coefficient, natural mortality coefficient, fishing mortality coefficient, total surviving rate, total mortality rate, natural mortality rate, fishing mortality rate and exploitation rate were estimated by the model of...

According to the monitoring data of fishery resources in the middle and upper reaches of the Yangtze River in 1996-1999, this paper deals with the fishery biological characteristics of ten species of major commercial fishes. The population growth parameters(K, L ∞, W ∞),total mortality coefficient, natural mortality coefficient, fishing mortality coefficient, total surviving rate, total mortality rate, natural mortality rate, fishing mortality rate and exploitation rate were estimated by the model of von Bertalanffy, Key and Beverton Holt etc. The exploitation status of the stocks was also discussed. In view of the existing problems, the authors make some suggestions on the fishery management.

根据 1 996— 1 999年长江中上游渔业资源监测资料 ,分析了青鱼、草鱼、鲢、鳙、铜鱼、圆口铜鱼、长吻、河鲶、瓦氏黄颡鱼、鲤等 1 0种主要经济鱼类的渔业生物学特性 ,并应用vonBertalanffy公式、Key公式、Beverton Holt公式等估计了生长参数、总死亡系数、自然死亡系数、捕捞死亡系数、总存活率、总死亡率、自然死亡率、捕捞死亡率和开发率 ,讨论了资源的开发状况 ,针对存在的问题 ,提出了渔业管理意见。

The acute toxicity of microcystin(MC-LR) on the rotifer Brachionus plicatilis in salt and fresh water were studied. Using clonal culture and through compilation of life tables to calculate intrinsic increase rates (rm), finite increase rates(l), net reproductive rates (R0) and generation times(T), the effects of MC-LR in its concentration of 1~20mg/mL on the rotifer population growth parameter were studied. Results showed the 24h LC50 value for MC-LR was 124.87mg/mL. Survival and reproductive rates and...

The acute toxicity of microcystin(MC-LR) on the rotifer Brachionus plicatilis in salt and fresh water were studied. Using clonal culture and through compilation of life tables to calculate intrinsic increase rates (rm), finite increase rates(l), net reproductive rates (R0) and generation times(T), the effects of MC-LR in its concentration of 1~20mg/mL on the rotifer population growth parameter were studied. Results showed the 24h LC50 value for MC-LR was 124.87mg/mL. Survival and reproductive rates and population growth parameter of rotifer at each test group was lower than the control group, while R0 changed most distinctly, with its values ranged from 2.4 to 3.8 times lower at test groups as compared to the control group. Male rotifer occurrence rate of test groups was over 2 times larger than that of the control group. These results indicated that: Rotifer showed rather strong tolerant capacity toward MC-LR; MC-LR could decrease lifespan, fecundity and population growth rates of the rotifer; and MC-LR could lead to the occurrence of male rotifer.

研究了微囊藻毒素(MC-LR)对咸淡水褶皱臂尾轮虫的急性毒性效应.采用克隆培养法,通过编制生命表计算内禀增长率(rm)、周限增长率(l)、净生殖率(R0)和世代时间(T),研究MC-LR的浓度在1~20mg/mL之间对轮虫种群增长参数的影响.结果表明,MC-LR的24h LC50为124.87mg/mL;各实验组轮虫的存活率和繁殖率及种群增长参数均低于对照组,其中以R0的改变最明显,对照组是实验组的2.4~3.8倍;实验组轮虫的雄体发生率是对照组的2倍以上.研究还显示了轮虫对MC-LR有较强的耐受能力;MC-LR能降低轮虫的生命周期、繁殖和种群增长率;MC-LR能诱导轮虫雄性个体的发生.

 
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