What Determines Animal Group Size? Insider-Outsider Conflict and Its Resolution

1993 ◽  
Vol 142 (3) ◽  
pp. 553-563 ◽  
Author(s):  
M. Higashi ◽  
N. Yamamura
Keyword(s):  
Group Size ◽  
Animal Group

scholarly journals A Markov jump process modelling animal group size statistics

2020 ◽  
Vol 18 (1) ◽  
pp. 55-89
Author(s):  
Pierre Degond ◽  
Maximilian Engel ◽  
Jian-Guo Liu ◽  
Robert L. Pego
Keyword(s):  
Group Size ◽  
Jump Process ◽  
Process Modelling ◽  
Markov Jump ◽  
Animal Group ◽  
Markov Jump Process

Effect of Floor Space Allotment and Animal Group Size on Beef Cattle Performance

1981 ◽  
Vol 24 (2) ◽  
pp. 0450-0451 ◽  
Author(s):  
S. R. Morrison ◽  
G. P. Lofgreen ◽  
Michael Prokop
Keyword(s):  
Beef Cattle ◽  
Group Size ◽  
Animal Group ◽  
Floor Space ◽  
Cattle Performance

scholarly journals Understanding Animal Group-Size Distributions

PLoS ONE ◽  
2011 ◽  
Vol 6 (8) ◽  
pp. e23438 ◽  
Author(s):  
Michael Griesser ◽  
Qi Ma ◽  
Simone Webber ◽  
Katharine Bowgen ◽  
David J. T. Sumpter
Keyword(s):  
Group Size ◽  
Size Distributions ◽  
Animal Group

scholarly journals Self-similar Spreading in a Merging-Splitting Model of Animal Group Size

2019 ◽  
Vol 175 (6) ◽  
pp. 1311-1330
Author(s):  
Jian-Guo Liu ◽  
B. Niethammer ◽  
Robert L. Pego
Keyword(s):  
Group Size ◽  
Animal Group ◽  
Self Similar

scholarly journals Scaling in animal group-size distributions

1999 ◽  
Vol 96 (8) ◽  
pp. 4472-4477 ◽  
Author(s):  
E. Bonabeau ◽  
L. Dagorn ◽  
P. Freon
Keyword(s):  
Group Size ◽  
Size Distributions ◽  
Animal Group

scholarly journals Coagulation–Fragmentation Model for Animal Group-Size Statistics

2016 ◽  
Vol 27 (2) ◽  
pp. 379-424 ◽  
Author(s):  
Pierre Degond ◽  
Jian-Guo Liu ◽  
Robert L. Pego
Keyword(s):  
Group Size ◽  
Fragmentation Model ◽  
Animal Group

scholarly journals Comparing radio-tracking and visual detection methods to quantify group size measures

2015 ◽  
Vol 1 (2) ◽  
pp. 1-4 ◽  
Author(s):  
Jenő Reiczigel ◽  
María Fernanda Mejía Salazar ◽  
Trent K. Bollinger ◽  
Lajos Rózsa
Keyword(s):  
Group Size ◽  
Rocky Mountain ◽  
Field Studies ◽  
Visual Observation ◽  
Detection Methods ◽  
Data Sets ◽  
Animal Group ◽  
Two Samples ◽  
In The Wild ◽  
Group Size Distribution

Abstract1. Average values of animal group sizes are prone to be overestimated in traditional field studies because small groups and singletons are easier to overlook than large ones. This kind of bias also applies for the method of locating groups by tracking previously radio-collared individuals in the wild. If the researcher randomly chooses a collared animal to locate a group to visit, a large group has higher probability to be selected than a small one, simply because it has more members.2. The question arises whether location of groups by means of finding collared animals has smaller or greater bias than searching for groups by visual observation. If the bias is smaller or same, this method can be recommended for finding groups. However, such a comparison cannot be made by speculation, only by empirical investigation.3. The present study compares the two methods empirically, by statistically comparing group size measures (mean, median, quantiles, frequency distribution, and ‘typical group size’) between two data sets. These data sets comprise of Rocky Mountain mule deer group size values collected in the same area during the same period of time, referring either to groups located by the traditional ‘search and observe method’ or located by tracking formerly collared individuals.4. All group size measures are statistically similar in the two samples, thus we conclude that the two methods yielded similar biases. Although the true group size measures are not known, we presume that both methods have overestimated them. We propose that these results do not necessary apply to other species, thus cannot be generalized. The reason for this is that bias may depend on factors specific to the species: bias of visual observation may depend on how well the species conceals itself in the existing habitat, and the bias associated with finding groups using collared animals is likely dependent on group size distribution and also on the proportion of collared animals in the population.

A first principles derivation of animal group size distributions

2011 ◽  
Vol 283 (1) ◽  
pp. 35-43 ◽  
Author(s):  
Qi Ma ◽  
Anders Johansson ◽  
David J.T. Sumpter
Keyword(s):  
Group Size ◽  
First Principles ◽  
Size Distributions ◽  
Animal Group

An ecological basis for large group size in Colobus angolensis in the Nyungwe Forest, Rwanda

2001 ◽  
Vol 39 (1) ◽  
pp. 83-92 ◽  
Author(s):  
Cheryl Fimbel ◽  
Amy Vedder ◽  
Ellen Dierenfeld ◽  
Felix Mulindahabi
Keyword(s):  
Group Size ◽  
Large Group ◽  
Colobus Angolensis ◽  
Ecological Basis
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