By striking a balance between tractability and ecological relevance, the populationlevel ecological risk assessment (PLERA) is playing an important role for risk management of chemicals, and PLERA entails calculating Cλ=1, the critical concentration whereby the finite population growth rate (λ) is...
Population in the world is currently at 7.5 billion as of 2017 and growing at a rate of around 1.11% per year. Population is expected to keep growing and estimates at 8.4 billion by 2030 and 9.6 billion by mid-2050. Annual population growth rate reached its peak in the late 1960s, when...
The relationship between genetic variability and growth rate among populations of the pocket gopher, Thomomys bottae This result lendscredence to the premise that differences inpopulation level genetic variability havesignificant fitness consequences andunderscores the importance ... KK Hildner,ME Soulé,MS...
Therefore, we decided to sub-sample the data to make computation feasible. We employed two sub-sampling strategies. First, we used RECE samples comprised of 50 probable event count sequences and, second, we sub-sampled the RECEs with respect to time so that only every 10th observation was ...
a随着中国人口的不断增长,人们生活用水的增加,早先采用继电器作为水塔水位的自动控制系统,由于频繁操作,会产生机械电气磨损,而且维护和更新不方便,已经不能满足人们对于这个时代的需求了 Along with China's population unceasing growth, the people domestic water increase, previously used the relay to take the ...
Computation of standard errors If the assumption of constant standard deviations of measurement errors is relaxed, the heteroscedasticity is characterized by an n element vector [[sigma].sub.[epsilon]] = ([[sigma].sub.[epsilon]1], [[sigma].sub.[epsilon]2], ..., [[sigma].sub.[epsilon]n...
Fig. 5: Inference of independent domestication events of apricot, with divergence in the face of gene flow, using random-forest approximate Bayesian computation combined with coalescent-based simulations. afastSTRUCTURE barplot for the pruned dataset used for random-forest approximate Bayesian computation...
1 for α1=α2=1 and α3=0.25 (corresponding to t measured in units of the common growth rate constant α). It would seem therefore that the collection of the different RB populations is likely to be increasing immediately after the onset of the RB-to-EB conversion unless the system has...
it adjusts the offspring population size depending on the success of the generation. If the fittest offspringyis better than the parentx, the offspring population size is divided by theupdate strength\(F>1\), and multiplied by\(F^{1/s}\)otherwise, with\(s>0\)being thesuccess rate. ...
et al. Population genetic structure and approximate Bayesian computation analyses reveal the southern origin and northward dispersal of the oriental fruit moth Grapholita molesta (Lepidoptera: Tortricidae) in its native range. Mol. Ecol. 24, 4094–4111 (2015). Article PubMed Google Scholar Petit,...