+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Competitive foraging in the social spider Stegodyphus dumicola

, : Competitive foraging in the social spider Stegodyphus dumicola. Animal Behaviour 58(3): 677-688

Reproductive skew models have greatly enhanced the study of sociality but are applicable only to societies where the aim of the members of the group is to reproduce. In 'foraging societies', where the aim of the members of the group is to grow, quite different parameters will govern the form that the societies take. We examined factors that influence the structure of foraging groups in the social spider Stegodyphus dumicola (Eresidae). In particular, we examined food distribution and consumption within groups, and how this related to predictions derived from two models. One model indicates that colonies in which individuals compete for resources via interference competition are more likely to survive than those in which individuals divide resources using scramble competition. The second model predicts the proportions of hunters, cheaters and scavengers expected in foraging groups. We found that food was not distributed evenly among group members, and that spiders that fed primarily on the head and thorax of the prey during the middle of a feeding event gained the most body mass. Spiders even lost mass if they fed only in the last hour of a foraging event. Large spiders had a competitive advantage (via interference competition) in obtaining preferred positions, and could ingest food faster than small spiders. Distributing food among colony members in this manner could cause large size differences between colony members, as predicted by the models. The implications of competitive foraging for sociality are discussed. Copyright 1999 The Association for the Study of Animal Behaviour.


PMID: 10479384

DOI: 10.1006/anbe.1999.1168

Other references

Murray, T.; Selmes, N.; James, T.D.; Edwards, S.; Martin, I.; O'Farrell, T.; Aspey, R.; Rutt, I.; Nettles, M.; Baugé, T., 2015: Dynamics of glacier calving at the ungrounded margin of Helheim Glacier, southeast Greenland. NlmCategory="UNASSIGNED">During summer 2013 we installed a network of 19 GPS nodes at the ungrounded margin of Helheim Glacier in southeast Greenland together with three cameras to study iceberg calving mechanisms. The network collect...

Chiang, K.S., 1989: Acousto-optical modulation method for measuring the beat length of a linearly birefringent optical fiber. A simple, accurate, and nondestructive method based on acousto-optical modulation of the polarization and the optical frequency in a linearly birefringent fiber is proposed for measuring the beat length of the fiber. Short beat lengths can be meas...

Sinitsyn N.M., 1956: O tektonike dokembriya. In general, the regional structural elements of the Precambrian are relatively simple, although complicated folding is also characteristic. The structural simplicity of certain areas of development of the Precambrian may be related to the gradual...

Bristow, J.M.; Reno, T.A.; Jo, M.; Gonias, S.L.; Klemke, R.L., 2013: Dynamic phosphorylation of tyrosine 665 in pseudopodium-enriched atypical kinase 1 (PEAK1) is essential for the regulation of cell migration and focal adhesion turnover. Pseudopodium-enriched atypical kinase 1 (PEAK1) is a recently described tyrosine kinase that associates with the actin cytoskeleton and focal adhesion (FA) in migrating cells. PEAK1 is known to promote cell migration, but the responsible mechanism...

Björntorp, P.; Holm, G.; Rosmond, R., 1999: Neuroendocrine disorders cause stress-related disease. "Civilization syndrome" is a growing health problem. Although the relationship between stress and serious diseases, such as ischaemic heart disease, is well known, the underlying mechanisms have proved difficult to identify. With a new technique available today, the hypothalamic-pituitary-adrenocort...

Bader, Jürgen.E.; Beck-Sickinger, A.G., 2004: Fluorescence resonance energy transfer to study receptor dimerization in living cells. The versatility, sensitivity, and feasibility of fluorescence methods are very attractive to study protein-protein interaction at low levels of protein expression. However, one of the most severe limits in protein chemistry has been the difficulty...

W.D.J.; Mifune J.; Hifumi S.; Takahashi Y.; Yamashita S.; Suematsu T.; Murakami T.; Tanaka T., 1989: The effect of transluminal coronary angioplasty ptca on the myocardium perfused by severe coronary artery stenosis hibernating myocardium. Japanese Circulation Journal 53(8): 908

Bartlett, G.S., 1961: Cary harvester built to operate in trash conditions. This machine tops, cuts and loads cane and requires 2 operators. It also handles lodged cane in the rows. The action is described and shown diagrammatically.

Aoyagi T.; Fujii A.M.; Flanagan M.F.; Currier J.J.; Colan S.D.; Mirsky I., 1991: End systolic stress strain relations in enhanced contractility with dobutamine. Journal of the American College of Cardiology 17(2 SUPPL A): 375A

Krayushkin V.A., 1967: Optical activity of crudes from the Menilite series of the Dolina field. Dextrorotatory crudes, areal changes in optical activity, Oligocene, USSR, Ukraine.