reproductive rate

They have a notoriously low reproductive rate and are under pressure from factors such as habitat loss .

它们的繁殖率很低，并且处在栖息地缩减的生存压力下。

Results show that cloprostenol can be used to induce the estrus of Tree shrew and increase their reproductive rate effectively .

由此表明，氯前列烯醇能有效诱发树鼩的发情，提高其繁殖率。

The basic reproductive rate and the simulation considering the spatial factors .

考虑空间因素的基本再生率及模拟。

Influence of Temperature on Reproductive Rate of Anhui White Goat

温度对安徽白山羊受胎率和产仔数的影响

Study and Practice on Improving the Reproductive Rate of Stud Sows

提高种母猪繁殖效率的探索与实践

Synthetic Technology and Measure of Improving Sow Reproductive Rate

提高母猪繁殖利用率的综合技术措施

Urbanization in Spain is distinctly correlated with a fall in reproductive rate .

西班牙都市化进程的加快很明显和该国的出生率下降有关。

There are a great number of researches on general technique that could increase the reproductive rate in cattle at home .

有关提高牛群繁殖效率的一般技术问题国内研究较多，以经济和管理为目的分析技术结构的资料较少。

Specific works are summarized below : 1 . The estimation model and simulation based on reproductive rate of home-based .

具体的工作概括如下：1.基于家庭基本再生率估计模型及模拟。

The reproductive rate can be increased by root-cutting .

人工根插繁殖可提高本属植物的繁殖系数。

After analysis of epidemic model in constant recruitment and exponential born conditions , the basic reproductive rate was identified .

结合具有常数移民和指数出生的一般情形对所建传染病模型进行了分析研究，给出了基本再生数R0，当R0≤1时，无病平衡点全局渐近稳定；

Effect of the Species and Quantities of Aquatic Food Organisms on the Reproductive Rate of Shrimp and Crab

水中饵料生物的种类和数量对虾蟹繁育率的影响

The reproductive rate , the concentration of hormone from low to high , and then from high to low on the subculture .

在继代培养中激素浓度一般由低到高，再由高到低的循环，可以明显提高繁殖率。

Gentle Behavior and Reproductive Rate of Domesticated Female Alopex lagopus in Seminal Period

繁殖期驯养母蓝狐的温驯行为与繁殖率

As the traditional reproduction of orchid needs long period , and the reproductive rate is low . It can not satisfy market demand .

由于兰科植物繁殖都是靠传统形式的分株繁殖，周期长、繁殖率低，不能满足国内外市场的需求。

Conclusion The method of single tube oviposition can improve the quantity of laying eggs and the hatching rate , consequently improve the reproductive rate .

结论单管产卵法可提高嗜人按蚊的产卵数，提高孵化率，从而提高繁殖率。

Objective To compare the effects of colony oviposition and single tube oviposition for improving the reproductive rate of Anopheles anthropophagus .

目的比较群体产卵法与单管产卵法对提高嗜人按蚊繁殖率的效果。

Therefore , it is really important for the conservation of giant panda to develop artificial breeding technology to increase the reproductive rate and lessen the infant mortality .

因此，为提高熊猫种群数量，发展人工繁殖技术并增加繁殖率和减少夭折率是至关重要的。

Both temperature and sibling species affected markedly the net reproductive rate and intrinsic rate of population growth , but their interactions did not appear to be significant .

温度和姐妹种对轮虫的净生殖率和种群内禀增长率均有极显著影响，但两者的交互作用对其无显著性影响。

Due to the human hunt , habitat fragmentation and their low reproductive rate , the number of wild population of the species reduced and its distribution increasingly shrunk .

东方白鹳曾在历史上广泛分布于东亚各国，由于人类捕杀、栖息地破碎化、自身的繁殖率低等原因使该物种野生种群数量大量减少，分布区逐渐萎缩。

All the intrinsic rate of population increase , the net reproductive rate , the generation time and the finite rate of increase increased with the rise of the concentration of glyphosate .

轮虫的种群内禀增长率、净生殖率、世代时间和周限增长率均随草甘膦浓度的增大而增大。

Its net reproductive rate , the intrinsic rate of increase and the increment rate per unit were high , but its generation span and the time of double population size were low .

种群的净增殖率、内禀增长率及周限增长率较高，而种群的世代周期及加倍时间偏低；

Powdery mildew was circular diseases , that several generations could be reproduced in one season . The reproductive rate of powdery mildew and the propagation speed were high .

白粉病为多循环病害，病害的潜育期短，一个生长季节可繁殖多代，并且繁殖率高，传播速度快。

Net reproductive rate , generation time , life expectancy , and average lifespan of Guangzhou strain was all the maximum , and that of Wuhu strain minimum among the three strains .

三品系间，以广州品系轮虫的净生殖率、世代时间、生命期望值和平均寿命最大，芜湖品系最短。

There were significant effects of food concentration on life expectancy and average lifespan . The effect of strain on net reproductive rate , generation time , life expectancy and average lifespan was also significant .

食物浓度仅对轮虫的生命期望值和平均寿命有显著影响，品系对轮虫的净生殖率、世代时间、生命期望值和平均寿命也有显著影响。

Under the conditions of less rainy days during the blooming period , the temperature is the main factor influencing the reproductive rate , then is the duration of day and the velocity of wind .

在阴雨较少的情况下花期温度是影响繁殖率高低的主导因素，其次为日照时数和平均风速。

The preimaginal period was prolonged , and the net reproductive rate ( Ro ), innate capacity for increase ( Rm ) and finite rate of natural increase (λ) were all decreased .

成蚊前期历期时间延长，净增殖力、内禀增长力、增殖有限速率都有所下降。

The result shows that the reproductive rate and reproductive efficiency of the ewes have increased in the condition of indoor feeding in comparison with those in the condition of grazing ( P < 0.01 ) .

结果显示：舍饲条件下滩羊母羊的繁殖率和繁殖成活率比放牧条件下有一定程度提高。

Mantas , with their slow reproductive rate , are vulnerable to overfishing , so a robust tourist trade could give local communities an economic incentive to conserve the fish rather than kill them .

蝠鲼繁殖率缓慢，很容易受到过度捕捞，所以强大的旅游业可以给当地社区的经济补助，以保护鱼类，而不是杀死它们。

Together with the features of naturally low reproductive rate and small population , the low survival rate resulting from high infant mortality of giant panda makes it more vulnerable to all sorts of threats such as habitat encroachment and destruction .

由于其自然繁殖率低和种群数量少，以及高夭折率而导致的低存活率，使得大熊猫易受栖息地侵犯及毁坏等种种威胁。