Andrew Burchill

Andrew Burchill
Arizona State University | ASU · Center for Social Dynamics and Complexity

Bachelor of Science

About

10
Publications
1,658
Reads
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26
Citations
Introduction
Andrew Burchill currently works at the Center for Social Dynamics and Complexity, Arizona State University. Andrew does research in Evolutionary Biology, Entomology and Animal Communications.
Additional affiliations
August 2015 - May 2020
Arizona State University
Position
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Publications

Publications (10)
Preprint
The collective transport of massive food items by ant teams is a striking example of biological cooperation, but it remains unclear how these decentralized teams coordinate to overcome the various challenges associated with transport. Previous research has focused on transport across horizontal surfaces and very shallow inclines, disregarding the c...
Article
Full-text available
Many animals live in nests with a complex three‐dimensional structure that may significantly influence their behavior. However, the inaccessibility of nest interiors means that behavior within them often goes unobserved. The social networks of bats, for example, depend on interactions at roosting sites (Wilkinson et al. 2019), but only recently hav...
Article
The analysis of animal behaviour often requires uniquely marking and tracking many individuals simultaneously for long periods. However, these identifying marks can often be partially removed, erased or obscured, preventing accurate differentiation between individuals. Modern computer-readable tags can mitigate some of these challenges while also c...
Article
Full-text available
Heritable variation is essential for evolution by natural selection. In Neotropical army ants, the ecological role of a given species is linked intimately to the morphological variation within the sterile worker caste. Furthermore, the army ant Eciton burchellii is highly polyandrous, presenting a unique opportunity to explore heritability of morph...
Article
Full-text available
Colony size is an incredibly important factor in social insect ecology: it affects everything from foraging strategies to colony defense to mating systems to the degree of polymorphism. However, colony sizes vary dramatically among ant species (Formicidae): sizes range from several workers living together to super-colonies that stretch for hundreds...

Questions

Questions (3)
Question
To make this situation clear, I'll use a somewhat silly, but conceptually simple example. Imagine I record teams of movers carrying furniture down the block. I measure the furniture's position/speed over time (say every 15 seconds), the size of the furniture (small, medium, or large), and the numbers of people carrying the object at each 15 second time point. People on the teams join in and help transport or let go and step back freely; maybe they join when they feel they could be useful or something, who knows, it just changes.
I record these trips multiple times across different furniture sizes, etc. I now want to determine HOW the number of movers carrying the furniture and the size of furniture affect the speed of transport. If there were only one trip, I think I would use some sort of ARIMAX model and regress the number of movers against their instantaneous speed over the single time-series run (with ARIMA errors). However, I want to make a generalization ACROSS all these recordings and I want to see if the categorical variable of furniture size has an effect as well (or how it interacts with mover number). How in the world do I incorporate all of these recorded trips (many different time-series iterations) in one analysis?
Additionally, imagine I think both the speed and the number of helpers are non-stationary, but in different ways. I think it's likely that the speed increases throughout the trip, and the number of workers increases initially (as they try to get it going, say) and then decreases (once it's moving along, maybe extra movers just get in the way). What would I do in that situation?
Lastly, I'm trying to do this in R. Crazy bonus points if you can explain it using R code!
Question
So, I have several directed (multi-edged) networks, and within them each node has been assigned to one of seven categories (based on some *a priori* circumstances). Each category *should* have a higher within-category interaction rate, but I want to test the statistical significance of this.
Since "a set of nodes, densely connected internally" is pretty much the definition of a community, I want to manually impose my community assignments on the nodes in the network and then test whether this assignment is statistically more "community-like" than a random assignment. **In essence, my question is: "Is this given community structure statistically significant?"**
I found [this paper][1] which seems to have a way of measuring the statistical significance of a single community group in the network, but it doesn't seem to apply to a given, entire community structure. I also found [this baby][2], but it seems to only be focused on much smaller, local structures.
There's gotta be a way to do this for directed, multi-edged networks, I just can't seem to find any! (Additionally, I'll have to do this analysis in R, so mega-triple-extra bonus points if you know of an R package that already does this.)
Thanks in advance!
Question
I will be doing a video analysis of crabs swarming behavior in the field, via aerial drones. However, I have no previous experience buying drones and the video cameras that go on these drones. What models of both drones and Camera would be acceptable for this type of work? Could I just use a system with a GoPro? Is anything relatively good quality, cheap, and durable? Thanks!

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