Belated news: New paper in PRSB
I forgot to post that Matt Wilkins et al.'s paper now out in Proceedings of the Royal Society-B. We describe a phenotype network approach to understanding multimodal signal systems, using the barn swallow as a case study. This is one of the chapters of Matt's dissertation that he completed at CU Boulder, but it is also a big part of his current postdoc project in our lab/Hebets lab at UNL. Matt is now looking to apply this type of thinking to multimodal/multicomponent signals in wolf spiders.
The Shizuka Lab at the School of Biological Sciences, University of Nebraska-Lincoln (www.shizukalab.com) is seeking a postdoctoral researcher to study long-term dynamics of social networks in animal systems. The overarching goal is to understand the causes and consequences of stability and instability of animal societies. Possible projects may include modeling social network dynamics or analyzing of existing animal social network data. The successful candidate will have a Ph.D. in a relevant field (animal behavior, ecology and evolution, quantitative ecology) by the beginning of the appointment. Preferred qualifications include experience in network analysis in R or other platforms and/or experience managing and analyzing long-term socioecological datasets.
Review of applications will begin May 15th, 2017 and will continue until the position is filled. The position will begin as early as August 2017, with an initial appointment for one year and a possibility of extension for an additional year. To apply, send a cover letter outlining your research experience and why you are interested in joining the lab, a CV, and contact information for two references to Dai Shizuka: firstname.lastname@example.org
The University of Nebraska is committed to a pluralistic campus community through affirmative action, equal opportunity, work-life balance, and dual careers. See http://www.unl.edu/equity/notice-nondiscrimination. We assure responsible accommodation under the Americans with Disabilities Act.
Check out her fantastic blog: https://wingwhirrs.com/
Dai has a new paper in Animal Behaviour, co-authored with Damien Farine of the Max Planck Institute. The paper presents a method to assess the robustness of 'community assignment' procedures to detect social clusters in networks. The assignment of nodes to network communities is a popular method to understand the structure of societies and has implications for the evolution of social dynamics. However, there are some potential pitfalls when trying to use bootstrapping to assess the robustness of community assignments. We propose a way to combine bootstrapping with a measure of assortativity to determine whether community assignments are robust given a certain sample of observations. We find that the robustness of community assignment is contingent on both the sample size and the underlying structure of the network--e.g., more samples do not add robustness when networks are highly clustered or not clustered at all, but sample size does matter when community structure is intermediate (as is often the case).
Shizuka, D. and Farine, D. R. (2016) Measuring the robustness of network community structure using assortativity. Animal Behaviour. 112: 237-246. link
Our new paper on winter social structure in golden-crowned sparrows (Dai is a co-author) is now out at Molecular Ecology!
Arnberg et al. (2015) investigated the effect of kinship on social network structure in a wintering population of migrant sparrows across years. Our previous work (Shizuka et al. 2014) showed how these networks consist of social communities of birds that flock together with each other much more often than with others, and that these social communities remain stable across years (with turnover in membership). The current work shows that flocks are not composed of kin, although there are some high-relatedness pairs (equivalent to cousins) in the population. Our works shows how to integrate social network data with kinship data. This was also the first chapter in Nina Arnberg's (Lyon Lab, UCSC) recently-defended dissertation. Congrats Nina!
Here is the link to the paper: http://onlinelibrary.wiley.com/doi/10.1111/mec.13366/abstract?campaign=woletoc
It's Week 2 of the fall semester here at UNL. We are starting out with a bang:
- Maria Goller is starting off her Ph.D. program here this semester. She brings expertise in field ecology + ornithology and a lot of really great ideas. Super excited to see what she'll produce in the next few years!
- We are getting some new undergrads/lab technicians involved. Stay tuned.
- Two new papers accepted over the past couple of weeks. Can't wait to see them in print soon!
- Dai and Matt helped out with field work at the beginning of June and then attended the Animal Behavior Society meeting in Anchorage, AK June 10-14th. Dai gave a contributed talk on network approaches to studying dominance hierarchies. Matt gave an Allee Award talk on phenotype networks. A fun and productive meeting!
Here's what's been happening at the Shizuka Lab:- The field team led by grad student Emily and joined by UNL undergrad assistants Elizabeth Zurfluh + Dylan Horrocks, plus Theadora Block (Master student @ UCSC) has been conducting field work on golden-crowned sparrows at Hatcher Pass, AK since the beginning of June. They concluded their field season yesterday and arrive home today!
Elizabeth and Dylan on the move, looking for sparrow nests. Photo by M. Wilkins
Dai has two new papers in Animal Behaviour and Journal of the Royal Society Interface. The Animal Behaviour paper is a co-authored paper with Bruce Lyon (UCSC) and John Eadie (UC Davis) that addresses why coots reject parasitic duck eggs using an experiment on coots where there are no brood parasitic ducks. The Interface paper is a third in a series of papers with Dave McDonald (U Wyo) on networks of dominance relations in non-human animals. We apply network motif analysis to compare datasets from studies spanning 80 years.