Prey to predator body size ratio in the evolution of cooperative hunting-a social spider test case
| Autor: | Lena Grinsted, Mads Fristrup Schou, Christina Holm, Tharina L. Bird, Trine Bilde, Virginia Settepani |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
0301 basic medicine Zoology Phenotypic plasticity Predator-prey interactions 010603 evolutionary biology 01 natural sciences Predation 03 medical and health sciences Genetics Animals Body Size Cooperative hunting Dietary niche Correlation of Data Social Behavior Predator Sociality Phylogeny Stegodyphus Social evolution biology Behavior Animal Spiders Anelosimus biology.organism_classification Biological Evolution Group living 030104 developmental biology Predatory Behavior Social spider Developmental Biology |
| Zdroj: | Grinsted, L, Schou, M F, Settepani, V, Holm, C, Bird, T L & Bilde, T 2020, ' Prey to predator body size ratio in the evolution of cooperative hunting—a social spider test case ', Development Genes and Evolution, vol. 230, no. 2, pp. 173-184 . https://doi.org/10.1007/s00427-019-00640-w |
| ISSN: | 1432-041X |
| Popis: | One of the benefits of cooperative hunting may be that predators can subdue larger prey. In spiders, cooperative, social species can capture prey many times larger than an individual predator. However, we propose that cooperative prey capture does not have to be associated with larger caught prey per se, but with an increase in the ratio of prey to predator body size. This can be achieved either by catching larger prey while keeping predator body size constant, or by evolving a smaller predator body size while maintaining capture of large prey. We show that within a genus of relatively large spiders, Stegodyphus, subsocial spiders representing the ancestral state of social species are capable of catching the largest prey available in the environment. Hence, within this genus, the evolution of cooperation would not provide access to otherwise inaccessible, large prey. Instead, we show that social Stegodyphus spiders are smaller than their subsocial counterparts, while catching similar sized prey, leading to the predicted increase in prey-predator size ratio with sociality. We further show that in a genus of small spiders, Anelosimus, the level of sociality is associated with an increased size of prey caught while predator size is unaffected by sociality, leading to a similar, predicted increase in prey-predator size ratio. In summary, we find support for our proposed ‘prey to predator size ratio hypothesis’ and discuss how relaxed selection on large body size in the evolution of social, cooperative living may provide adaptive benefits for ancestrally relatively large predators. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink