scholarly journals Instantaneous areal population density of entire Atlantic cod and herring spawning groups and group size distribution relative to total spawning population

2018 ◽  
Vol 20 (2) ◽  
pp. 201-213 ◽  
Author(s):  
Nicholas C. Makris ◽  
Olav Rune Godø ◽  
Dong Hoon Yi ◽  
Gavin J. Macaulay ◽  
Ankita D. Jain ◽  
...  
Keyword(s):  
Population Density ◽  
Size Distribution ◽  
Group Size ◽  
Atlantic Cod ◽  
Group Size Distribution

Group-size distribution of skeins of wild geese

2012 ◽  
Vol 86 (3) ◽  
Author(s):  
Yoshinori Hayakawa ◽  
Sho Furuhashi
Keyword(s):  
Size Distribution ◽  
Group Size ◽  
Group Size Distribution

scholarly journals Distribution and habitat use of the Bluenose caribou herd in mid-winter

Rangifer ◽  
1986 ◽  
Vol 6 (2) ◽  
pp. 57 ◽  
Author(s):  
D. R. Carruthers ◽  
S. H. Ferguson ◽  
R. D. Jakimchuk ◽  
L. G. Sopuck
Keyword(s):  
Habitat Use ◽  
Size Distribution ◽  
Group Size ◽  
Vegetation Types ◽  
Small Lake ◽  
Winter Distribution ◽  
Preferred Habitat ◽  
Cow Calf ◽  
Group Size Distribution

The mid-winter distribution and densities of the Bluenose caribou herd were compared with previous surveys over six years and were similar in all years except 1981 when exceptionally mild weather prevailed. Differences in group size, distribution and habitat use between sexes were noted in 1983. Caribou were distributed disproportionately to availability of vegetation types and used lakes significantly more than expected based on their occurrence. Male groups used conifer cover more than did female-calf groups which used open areas (lakes, fens, bogs) more than males. Cow-calf groups chose areas with a higher small lake density compared to lake density generally available. Generally caribou preferred habitat between 200 and 300 m in elevation with high densities of lakes less than 1 km2 in size. Snow depths and hardness were greater in most unoccupied habitats than in occupied habitats. Wolves were associated with high densities of cow/calf groups.

Variability in Grouping in the Eastern Grey Kangaroo, Macropus giganteus I. Group Density and Group Size

1984 ◽  
Vol 11 (3) ◽  
pp. 423 ◽  
Author(s):  
CJ Southwell
Keyword(s):  
Seasonal Variation ◽  
Population Density ◽  
Group Size ◽  
Spatial Dispersion ◽  
Population Densities ◽  
Forest Habitat ◽  
Open Forest ◽  
Grey Kangaroo ◽  
Group Density ◽  
The Relationship

The effects of season, population density and habitat on group density and group size in the eastern grey kangaroo were examined. In an open forest habitat, both group density and group size increased significantly with population density, but no seasonal variation was detected for either parameter. The relationship with population density was logarithmic for group density and exponential for group size. In a tall shrubland habitat both group density and group size increased with population density, but the range of population densities sampled was too narrow for the nature of the relationships to be determined. Group density was significantly higher, and group size significantly lower, in the tall shrubland than in the open forest. Possible reasons for this difference in spatial dispersion between habitats are discussed.

scholarly journals Variability in group size and the evolution of collective action

2015 ◽  
Author(s):  
Jorge Peña ◽  
Georg Nöldeke
Keyword(s):  
Collective Action ◽  
Social Interactions ◽  
Group Size ◽  
Replicator Dynamics ◽  
Cooperative Behavior ◽  
Biased Sampling ◽  
Multiplayer Games ◽  
Collective Action Problems ◽  
Payoff Structure ◽  
Group Size Distribution

AbstractModels of the evolution of collective action typically assume that interactions occur in groups of identical size. In contrast, social interactions between animals occur in groups of widely dispersed size. This article models collective action problems as two-strategy multiplayer games and studies the effect of variability in group size on the evolution of cooperative behavior under the replicator dynamics. The analysis identifies elementary conditions on the payoff structure of the game implying that the evolution of cooperative behavior is promoted or inhibited when the group size experienced by a focal player is more or less variable. Similar but more stringent conditions are applicable when the confounding effect of size-biased sampling, which causes the group-size distribution experienced by a focal player to differ from the statistical distribution of group sizes, is taken into account.

Mangabey (Cercocebus albigena) population density, group size, and ranging: A twenty-year comparison

1994 ◽  
Vol 32 (3) ◽  
pp. 197-205 ◽  
Author(s):  
William Olupot ◽  
Colin A. Chapman ◽  
Charles H. Brown ◽  
Peter M. Waser
Keyword(s):  
Population Density ◽  
Group Size
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