Group size mediates effects of intraspecific competition and forest structure on productivity in a recovering social woodpecker population

2021 ◽  
Author(s):  
J. E. Garabedian ◽  
C. E. Moorman ◽  
M. N. Peterson ◽  
J. C. Kilgo
Keyword(s):  
Group Size ◽  
Forest Structure ◽  
Intraspecific Competition

Developing predictive models of behaviour: Do rockwallabies receive an antipredator benefit from aggregation?

2003 ◽  
Vol 25 (2) ◽  
pp. 147 ◽  
Author(s):  
DT Blumstein ◽  
JC Daniel
Keyword(s):  
Group Size ◽  
Predictive Models ◽  
Intraspecific Competition ◽  
Size Effects ◽  
Limited Resources ◽  
Free Living ◽  
Size Function ◽  
Social Animals ◽  
Specific Shape ◽  
To Receive

Many species receive an antipredator benefit from aggregation such that animals in larger groups are able to allocate more time to foraging and less to antipredator vigilance. These beneficial ?group size effects? must be traded-off against the costs of increased competition for limited resources that may result from aggregation. Certain species, or species living in certain habitats, may be predisposed to receive greater benefits from aggregation than others. Based on the results of a study of captive yellow-footed rock-wallabies (Petrogale xanthopus; a ?Vulnerable? macropodid marsupial), we predicted that because rock-wallabies must defend vital resources (the locations where they shelter by day), there are costs which reduce the overall antipredator benefits obtained from aggregation while foraging. We tested this prediction by observing three different species of free-living rock-wallabies as they foraged in aggregations of different sizes. Allied (P. assimilis) and unadorned (P. inornata) rock-wallabies received no obvious antipredator benefits from aggregation since there was no effect of group size on time spent vigilant by individuals. Mareeba rock-wallabies (P. mareeba) may receive antipredator benefits, since animals tended to forage more and looked less as group size increased. However, this result was influenced by two observations that had substantial leverage. Additionally, even if present, the specific shape of this group-size function suggests that intraspecific competition in P. mareeba increases with group size. As a clade, rockwallabies appear to have costs which reduce or eliminate antipredator benefits associated with aggregation. Conservation efforts to recover populations should consider the likely importance of intraspecific competition for these species, and generalizations about introducing or translocating social animals socially should rest upon their being demonstrable benefits from aggregation.

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

Conformity and Group Size: A Comparison between ROTC and Civilian Students

2003 ◽  
Author(s):  
William E. Knor ◽  
Vanessa L. Peca
Keyword(s):  
Group Size

Bystanders, Group Size and the Informal Regulation of Violence

2008 ◽  
Author(s):  
Mark Levine ◽  
Rachel Best ◽  
Paul Taylor
Keyword(s):  
Group Size ◽  
Informal Regulation

Conformity and group size.

1968 ◽  
Vol 8 (1, Pt.1) ◽  
pp. 79-82 ◽  
Author(s):  
Harold B. Gerard ◽  
Roland A. Wilhelmy ◽  
Edward S. Conolley
Keyword(s):  
Group Size

Evaluation of roe deer effects upon forest structure in Nogueira Mountain (NE of Portugal)

2007 ◽  
Vol 3 (2) ◽  
Author(s):  
Aurora Monzon ◽  
António L. Crespí ◽  
Sónia Pinto ◽  
Adriano Castro ◽  
Claúdia P. Fernandes ◽  
...  
Keyword(s):  
Forest Structure ◽  
Roe Deer

Effects of group-size-floor space allowance during the nursery phase of production on growth, physiology, and hematology in replacement gilts

2017 ◽  
Vol 95 (1) ◽  
pp. 201
Author(s):  
S. R. Callahan ◽  
A. J. Cross ◽  
A. E. DeDecker ◽  
M. D. Lindemann ◽  
M. J. Estienne
Keyword(s):  
Group Size ◽  
Growth Physiology ◽  
Floor Space

Forest structure and tree ring widths from the Fire and Fire Surrogate Study - Blodgett Forest Site

2014 ◽  
Author(s):  
Brandon M. Collins ◽  
Adrian J. Das ◽  
John J. Battles ◽  
Danny L. Fry ◽  
Kevin D. Krasnow ◽  
...  
Keyword(s):  
Tree Ring ◽  
Forest Structure ◽  
Forest Site
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