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Questions tagged [population-ecology]

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Converting annual survival rate to daily mortality probability

In a peer-reviewed paper, I came across the following conversion: Yearly survival rate -> 0.70 The authors have calculated the daily probability of death using (1 - 0.70^(1/365.25)) = 0.000976 ...
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28 views

How to numerically solve a matrix differential equation in R?

I have interest in using the R language and environment to numerically solve a system of linear ordinary differential equations. The numerical solver, deSolve, ...
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43 views

compare distribution a categorical variable between a population and a subpopulation

So I have the following situation of having a population P with individuals belonging to categorical variable A, ..., N. From this known population I created several sub-population P1, P2 (each time ...
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1answer
36 views

Proportion of cells with certain number of mutation in dividing population

I managed to reduce a problem in my research to the following: Suppose that we have a population of cells which starts with a single cell that has zero mutations, and at each time step each cell ...
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38 views

Comparing biological diversity before and after

I've got counts of two species in two treatments at two timepoints. I've got six replicates of each treatment. I'd like to know how to compare treatment diversity. As it is, I've calculated the ...
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2answers
197 views

What is the difference between a logistic curve and something that overshoots?

In population dynamics, the growth of a population can have exponential growth, or a logistic curve growth up to its carrying capacity, or it can overshoot the carrying capacity and fluctuate before ...
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1answer
118 views

Statistical Test on Anthropometric Data that varies with age, Z-test?

I have what seems like it should be simple statistics problem. Given anthropometric data (height, weight, BMI, age, etc.), determine if a sample population has significantly different anthropomorphic ...
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97 views

Generalized linear mixed model with time lags

I'm attempting to understand how random variables and one fixed variable are influencing an animal population over time. The trouble I am having is that my population density estimates were only ...
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188 views

How to implement Monte Carlo simulations in a composite measurement?

I hope you can help me with a question regarding Monte Carlo simulations. Though reading about this topic quite a bit, I didn’t find a good answer to my question. I am working on the seasonal ...
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Analyzing a Manova

I've tried to do a MANOVA analysis of a dataset, to control the distribution of multiple species to three variables (FISH, EROSIONFORCE and ZONATION). To do so I used the mvabund package in R. The ...
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65 views

Need help to understand the equation of stable population

I was reading this paper on non-stable and stable population momentum. There the authors have shown the formula for stable population $Q$ as: $$Q=\dfrac{\int_0^\beta n(x)v(x)dx}{bA_r},$$ $v(x)$ is ...
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1answer
834 views

Best books for a population-ecology and biology statistics [closed]

I know that there is question that's similar to this (Books on statistical ecology?). I've got recommendations from that, but want to ask you for an advise following this list of books: 1. Applied ...
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Describing Differences between Two Inferred Populations

I am interested in the size of an animal in two populations, and found reliable estimates of the population provided by NOAA. The data was in the form of estimated total population within discrete ...
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1answer
124 views

“Explaining” a time series - conceptual explanation needed

Imagine I have a time series for an animal population and a time series for a climatic variable during the same time period and at the same location. Unfortunately the data are observational (i.e., no ...
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2answers
811 views

Population model to model year to year dynamics

My task is to assess how various environmental variables affect annual population fluctuations. For this, I would use a model like: $$ \mbox{log} ( \mu_{i,j+1} ) = \mbox{log} ( \mu_{i,j} ) + R_{j} + \...