Density-dependent attributes of schooling in small pelagic fishes
- Environmental SciencebioRxiv
Many small pelagic fishes obligately form schools; some of these schools attain a remarkable size. Although the school is a fundamental and important ecological unit and is the site of biological…
Proximate factors influencing dispersal in the social spider, Stegodyphus mimosarum (Araneae, Eresidae)
- Environmental Science
To determine which factors influence the spiders' readiness to leave a colony and to map nest dispersion in Weenen Nature Reserve, Kwa-Zulu Natal, and to use this to explain nest distribution, the aim of this project was fIrstly.
The ecology and evolution of colony-size variation
- Environmental Science, BiologyBehavioral Ecology and Sociobiology
Understanding of factors generating and maintaining variation in colony size remains in its infancy and offers many opportunities for future research with broad implications for behavioral ecology.
Intra-specific competition in foraging Griffon Vultures Gyps fulvus: 1. Dynamics of group feeding
At high-intensity feeding sites close to the colonies younger vultures probably access a lower quantity and quality of resources than old adults, in accordance with the stable group size hypothesis.
The group-size paradox: effects of learning and patch departure rules
It is concluded that groups of optimal sizes can occur frequently if fitness functions are peaked and resources patchily distributed, without the need to invoke relatedness between joiners and established group members, group defense against joiners, or other mechanisms that were proposed earlier to prevent groups from becoming too large.
Social cohesion and foraging decrease with group size in fallow deer (Dama dama)
- PsychologyBehavioral Ecology and Sociobiology
It is concluded that social inequalities may lead to conflicting requirements among group members and instability of large groups, and movement synchronisation appears to interact with habitat openness to produce variations of group size as an emergent property of these aggregations.
Explaining the emergence of cooperative traits: An axiomatic theory of accumulation
Title of Dissertation: EXPLAINING THE EMERGENCE OF COOPERATIVE TRAITS: AN AXIOMATIC THEORY OF ACCUMULATION Michael Perlitz, Doctor of Philosophy, 2003 Dissertation directed by: Professor Dr. Piotr…
Climate fluctuations influence variation in group size in a cooperative bird
- Environmental Science, BiologyCurrent Biology
Birds of a Feather Flock Together: Extent of Long-Term Consistency of Colony-Size Choice in Cliff Swallows
- Environmental ScienceFrontiers in Ecology and Evolution
Explaining why animal groups vary in size is a fundamental problem in behavioral ecology. One hypothesis is that life-history differences among individuals lead to sorting of phenotypes into groups…
Experimental evidence that animal societies vary in size due to sex differences in cooperation
The experiments show that sex differences in the opposing forces of cooperation and competition can explain why variation in cooperative groups is widespread.