一些具体的研究结论:受益于海水温度上升,低北极鱼类如鳕鱼的种群数增加。
Among the specific findings: Low Arctic fish species such as pollack have benefited from rising ocean temperatures, which is why their populations have increased.
北极露脊鲸大约还有1万1千头。虽然种群数在增加,但仍是濒于灭绝的物种。
Bowheads, which number about 11,000, are an endangered species, though the population is increasing.
另一个指标,地球生命指数,是1 686种脊椎动物的种群数量变化的平均数。
Another indicator, the Living Planet Index, averages changes in the sizes of populations of 1, 686 vertebrate species.
第一种是在其它物种身上找到同样存在种群数瓶颈的证据,尤其是那些没有被克洛维斯人猎杀过的物种。
One is to look for evidence of population bottlenecks in other species, especially animals that were not hunted by the Clovis people.
美国渔猎局称,北落基山狼种群数已达到可自我维持繁衍的标准。 而班斯先生,为了这一刻,辛勤工作了二十年。
眼看着泰塔娇莺的数量与2001年相比减了80%,如今鸟盟估计栖息某处的泰塔娇莺的种群数在60至130只。
With sightings of the bird down nearly 80 percent compared with 2001, BirdLife now estimates the species's population at somewhere between 60 and 130 individuals.
在2005年10月禽类种群中疫情的地域扩大之后报告人间病例的新国家数从4个增加至9个。
The number of new countries reporting human cases increased from 4 to 9 after October 2005, following the geographical extension of outbreaks among avian populations.
本研究采用计盒维数刻画了延龄草不同生境下的种群空间分布格局。
This study depicts the population space distribution under different living circumstances using Box counting dimension.
在分布型研究基础上,探讨了资料代换模型,最适抽样数和种群序贯抽样模型。
The model data conversion, the population sequential sampling and the theoretical sampling number model were also built up in the paper.
种群内变异幅度最大和最小的分别为节间长和小穗数。
The variation extent of internode length is the Maximum in population, while that of spikelet number is the minimum.
种群格局信息维数能够刻划格局强度的尺度变化程度,揭示出种群个体分布的非均匀性状况。
The information dimension of population patterns quantifies the scale variation degree of pattern intensity, and discloses the unevenness of individual distribution.
种群格局关联维数是种群个体空间关联尺度变化规律的反映,表明了种群个体的空间相关程度。
Correlation dimension of population pattern could reflect not only the scaling variation properties of spatial correlation of individuals, but also the spatial occupation degree of population.
相对与身体大小的和年龄差异,种群间窝卵数、卵大小和窝卵质量间也有显著差异。
After accounting for differences in body size and age among populations, clutch size, egg size and clutch mass differed significantly among populations.
结果表明,幼虫的种群密度愈高,理论抽样数就愈少;
The results showed that the higher the population density of the larvae, the less is the theoretical number of sampling clumps;
结果表明:丝栗栲群落及其优势种群个体数、群落物种数和种对级的分享度随高度级增加都呈下降趋势;
The results indicated that the individual number of the community and its dominant, species number and sharing degree decreased as highness classes raised;
在算法中采用了自然数编码、随机选取种群、简单的“双亲单子”交叉策略和固定的突变概率。
The natural number coding, the random population selection, the simple crossover strategy of "two-parents-and-one-kid" and the fixed mutation probability were totally adopted.
在每一代种群中,调用单机问题的有效算法, 使 达到用户满意度的零件数 最 大。
With each generation, the effective algorithm used for transferring single machine problem has lessened the amount of user satisfactory degree accessory to the maximal scale.
在每一代种群中,调用单机问题的有效算法, 使 达到用户满意度的零件数 最 大。
With each generation, the effective algorithm used for transferring single machine problem has lessened the amount of user satisfactory degree accessory to the maximal scale.
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