Questions tagged [demography]
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Ancestral inference from demographic data
The question is inspired by this one, in the History community:
We consider a population, whereas the data we have the number of migrants arriving every year, as well as the initial and the current ...
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Why squirrel behaviour varies greatly throughout India?
Common squirrels seen in India, probably Indian palm squirrels; seem to have drastic different behaviour. And all squirrels of a definite locality, behave in a very consistently same whay. That seems ...
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What factors affect the number of individuals in an animal group?
Social animals can live in groups whose numbers vary greatly according to species (for instance wolves vs deer herds vs buffalo stampedes vs lemmings).
Is this number regulated only by environmental ...
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Value of r (intrinsic rate of natural increase)
What is the current value of 'r' (instrinsic rate of natural increase) in India? How do we calculate it?
My book says that In 1981, the r value for human population in India was 0.0205. But this ...
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Do death rate and birth rate become equal at replacement fertility rate?
A population transitions from stage 3 to stage 4 when the fertility rate reaches the population replacement level of 2.1.
My question is that if the population replacement level reached, shouldn't ...
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World population pyramid since 1800 [closed]
I am interested in understanding how the global population pyramid has changed in the last couple of centuries.
I have two questions:
1) Has this been calculated? Are there estimates of population ...
- 121
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What is the biology behind human population dynamics?
A paradox: Human population growth looks a lot like a simple logistic growth pattern. But the simplest interpretation of logistic growth doesn't seem to fit. Is this peculiar to humans, or does it ...
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How can a species switch from r to K - reproductive strategy in a single generation?
I ask because it seems as though humanity is in the midst of doing exactly this. Only a few decades ago, human population was growing exponentially, and it seemed destined to keep growing until ...
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Hybridization of an Indo-Aryan ethnic group and a Tibeto-Burmese ethnic group
The state in which I reside houses these two distinct ethnic groups.
Physical Traits of the Indo-Aryan group
Height:Medium
Eyes:does not posses epicanthic fold
Nasal bones:is not flat and broad
...
user21998
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What is the percentage of people living in England in 1500 AD whose lineage is still alive?
This sounds a bit random, but it stems from a lecture in statistical genetics which I attended a while ago. We were shown a population lineage graph from which it was clear that most lineages ...
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Human population growth - where can I find the data?
Out of curiosity, I'd like play around with data of human global demography.
Where can I find data that describe the "per region (per continent for example) population size" versus time since the "...
- 68k
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What sample sizes are ideal for carrying out Bayesian Skyline Plots?
I am interested in creating Bayesian Skyline Plots to look at demographic changes in certain population groups. However, these populations have very little within population variation. Around 5 ...
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Fecundity per woman in early humans
The average fecundity per woman varies a lot from country to country. I call average fecundity per woman the average number of born children per woman. In Homo sapiens, what was the average fecundity ...
- 68k
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Survival curve in early humans
The survival curve/function describes the probability of a given individual to survive to age $x$. In humans, today's survival function is very much influenced by medicine. This leads me to wonder ...
- 68k
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Survivorship Curves: Type II curve mortality rate is not constant?
In graphs of survivorship curves, I'm seeing that the Type II curves are straight lines, and the supplementary text says that the mortality rate is constant (i.e. the slope of the line is constant). ...
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Tree census data for Sweden/Scandinavia?
Is anyone aware of any attempts to count or approximate the number of trees there are in Sweden or Scandinavia? I have a small popular science side project for which this would be useful
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