scholarly journals How to measure chimpanzee party size? A methodological comparison

Primates ◽  
2020 ◽  
Vol 61 (2) ◽  
pp. 201-212 ◽  
Author(s):  
Kelly L. van Leeuwen ◽  
Tetsuro Matsuzawa ◽  
Elisabeth H. M. Sterck ◽  
Kathelijne Koops
Behaviour ◽  
1994 ◽  
Vol 130 (3-4) ◽  
pp. 229-252 ◽  
Author(s):  
Irenaeus J.A. Te Boekhorst ◽  
Paulien Hogeweg

AbstractChimpanzees live in societies that are characterised both by disorder and order. On the one hand, party size fluctuates in a randomlike fashion and party membership is unpredictable ; on the other hand, fundamental party structures are apparent; males are often in all-male parties whereas females remain mostly solitary. The customary sociobiological explanation is based on the assumptions that 1) competition for food favors solitariness (especially in females); 2) chimpanzee males share the costs of territorial defense against rivals from neighbouring communities and 3) genetical relatedness among males within a community compensates for fitness losses due to their competition for food and females. We point to some theoretical flaws in the reasoning that forms the basis of the current neo-Darwinistic model and to the lack of empirical data concerning male relatedness. Most importantly, chimpanzee-like party structures emerge by self-organisation in an artificial "world" in which "CHIMPs" do nothing more than searching for food and mates, without requiring any of the assumptions of the sociobiological model.


Author(s):  
Livia Maria Salvatori ◽  
Maurizio Marceca ◽  
Lorenzo Paglione ◽  
Aurora Angelozzi ◽  
Susanna Caminada ◽  
...  

2017 ◽  
Author(s):  
Jorge M. Fernandes ◽  
Cristina Leston-Bandeira ◽  
Carsten Schwemmer

Do elected representatives have a time-constant representation focus or do they adapt their focus depending on election proximity? In this paper, we examine this overlooked theoretical and empirical puzzle by looking at how reelection-seeking actors adapt their legislative behavior according to the electoral cycle. In parliamentary democracies, representatives need to serve two competing principals: their party and their district. Our analysis hinges on how representatives make a strategic use of parliamentary written questions in a highly party constrained institutional context to heighten their reselection and reelection prospects. Using an original dataset of over 32000 parliamentary questions tabled by Portuguese representatives from 2005 to 2015, we examine how time interacts with two keys explanatory elements: electoral vulnerability and party size. Results shows that representation focus is not static over time and, in addition, that electoral vulnerability and party size shape strategic use of parliamentary questions.


2011 ◽  
Vol 19 (14) ◽  
pp. 1582-1589 ◽  
Author(s):  
Indika Herath ◽  
Markus Deurer ◽  
David Horne ◽  
Ranvir Singh ◽  
Brent Clothier

2015 ◽  
Vol 30 (26) ◽  
pp. 1530053 ◽  
Author(s):  
R. Bernabei ◽  
P. Belli ◽  
A. Incicchitti ◽  
F. Cappella ◽  
R. Cerulli

An updated technical and methodological comparison of liquid noble gas experiments is presented with particular attention to the low energy physics application of double-phase noble gas detectors in direct Dark Matter investigations.


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