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The Evolution of Social Behavior in Insects and Arachnids: Causes and consequences of cooperation and permanent-sociality in spiders
ABSTRACT Social behavior that involves cooperation in nest building, prey capture, feeding and brood care has arisen independently several times among spiders. In most cases, this form of cooperativeExpand
SOCIALITY IN THERIDIID SPIDERS: REPEATED ORIGINS OF AN EVOLUTIONARY DEAD END
TLDR
It is shown that in Theridiidae this social system originated eight to nine times independently among 11 to 12 species for a remarkable 18 to 19 origins across spiders, suggesting a conflict between the short-term benefits and long-term costs of inbred sociality. Expand
Cooperation and non-linear dynamics: An ecological perspective on the evolution of sociality
TLDR
Consideration of the dynamical eVects of cooperation may shed light both on the ecological and demographic conditions leading to the origin and maintenance of group-living as well as on the forces responsible for shaping the diversity of animal societies. Expand
Colony Size and Individual Fitness in the Social Spider Anelosimus eximius
TLDR
Investigation of colonies of the social spider Anelosimus eximius found females in colonies containing between 23–107 females had india significantly higher lifetime reproductive success than females in smaller colonies, and Selection, therefore, should favor group living and itermediate colony sizes in this social spider. Expand
Cooperative capture of large prey solves scaling challenge faced by spider societies
TLDR
It is shown that web prey capture area per spider, and thus number of insects captured per capita, decreases with colony size in a neotropical social spider, illustrating the relevance of scaling laws to the size and functioning of levels of organization above the individual. Expand
Sex-Ratio Bias and Possible Group Selection in the Social Spider Anelosimus eximius
  • L. Avilés
  • Biology
  • The American Naturalist
  • 1 July 1986
TLDR
It is suggested that the unique population structure and dynamics of this social spider resulted in a change of balance between the opposing forces of group and individual selection, making evolutionarily stable a sex ratio that increases colony survival and proliferation. Expand
Solving the freeloaders paradox: Genetic associations and frequency-dependent selection in the evolution of cooperation among nonrelatives
  • L. Avilés
  • Biology, Medicine
  • Proceedings of the National Academy of Sciences…
  • 14 October 2002
TLDR
It is shown that freeloaders, whose presence is reflected in the development of linkage disequilibrium between grouping and cooperation, increase in frequency when rare, but are selected against when common due to the reduced productivity of the groups they overburden with their presence. Expand
Interdemic Selection and the Sex Ratio: A Social Spider Perspective
  • L. Avilés
  • Biology
  • The American Naturalist
  • 1 August 1993
Computer simulations of a metapopulation model that mimics social spider populations show that highly female-biased sex ratios evolve when continuously inbreeding lineages (colonies) proliferateExpand
The phylogeny of the social Anelosimus spiders (Araneae: Theridiidae) inferred from six molecular loci and morphology.
TLDR
The molecular data suggest that social species are scattered across the genus Anelosimus and thus that sociality has evolved multiple times, a significant finding for exploring the causes and consequences of social evolution in this group of organisms. Expand
The role of prey size and abundance in the geographical distribution of spider sociality.
TLDR
It is found that larger average insect size, rather than greater overall biomass per se, is a key characteristic of lowland tropical habitats correlating with greater sociality, and suggests that the availability of large insects may be a critical factor restricting social species to their lowland Tropical habitats. Expand
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