Summary
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1.
The agonistic behavior of the funnel-web building spider, Agelenopsis aperta (Gertsch), was studied using induced encounters between adult females at natural web sites. All behavior exhibited by either individual during the course of an encounter was recorded. The results were analyzed through the use of transition matrices and the following multivariate treatments: factor analysis, ordination, and multiple regression. These latter methods were used to provide insight into possible sources of variability and their underlying causes.
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Sequence outcome is primarily determined by the relative weight of the two contestants engaged in a territorial dispute. If the size difference is large, the larger of the two individuals wins in a significant number of cases. Home bias is evidenced in cases where body weights are close.
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3.
A stereotypy measure is devised that reflects the percent similarity of each sequence of events to an expected sequence (average). The frequency distribution, presence-absence or duration of all behavior patterns observed during the course of the disputes are utilized in measuring stereotypy. The territorial disputes of A. aperta exhibit low stereotypy, averaging 43% on a scale from 0 to 100%.
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4.
Low stereotypy is, in part, related to the utilization of 33 different action patterns by spiders in these disputes. Factor analysis is used to express these action patterns in terms of five functional groups including locating behavior, signaling behavior, threat behavior, contact behavior, and a multiple function category. The order of these categories represents increasing cost based on relative estimates of the energy expenditure necessary to complete a specific behavior pattern and the potential for injury through the use of it.
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5.
A Bray and Curtis ordination shows the important sources of between sequence variability to be the total energetic cost of the dispute and the complexity of behavior exhibited in it. The factors, in turn, depend on the resident-visitor status of the losing spider and on the relative size of the two contestants. The energetic cost of a dispute is markedly higher in those disputes in which the resident loses her territory. The number of action patterns and total frequency of acts observed are also greater in encounters in which the resident is the losing spider. Behavioral complexity is higher as well in cases where the weights of the two contestants are close.
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The variation in the pathways through which the sequences progress is shown to reflect the operation of assessment strategies by A. aperta. Initial assessment of the relative weights of the opponent is made through movements on the web at a distance (locating behavior). Subsequent activities depend on the results of this assessment, the predominant strategy being ‘retaliator’ (Maynard Smith and Price, 1973) in which an individual responds to escalation with further escalation. Spiders with a large weight advantage over the opponent tend to escalate directly to threat and contact behavior (‘hawk’ strategy). The corresponding strategy for a much smaller visiting spider is immediate retreat (‘mouse’). A much smaller resident spider, however, will exhibit the ‘retaliator’ strategy to the ‘hawk’ rather than the more conservative ‘mouse’ strategy. The particular stategy exhibited, then, also depends on the energetic investment a particular individual has in the contended resource.
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Within functional group variability is shown to significantly affect the outcome of territorial disputes. Winning spiders exhibit an average of 20% less stereotypy than losing spiders. Unpredictable behavior possibly confuses the opponent, causing it to make inaccurate assessments of the weights of the opponent relative to it. Retreat follows. This behavior is linked to the ‘protean displays’ exhibited in defense against predators (Humphries and Driver, 1967).
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References
Altman, S.A.: Sociobiology of rhesus monkeys. II. Stochastics of social communication. J. theor. Biol. 8, 490–522 (1965)
Aspey, W.P.: Wolf spider sociobiology: I. Agonistic display and dominance-subordinance relations in adult male Schizocosa crassipes. Behavior (in press)
Barlow, G.W.: Ethological units of behavior. In: The central nervous system and fish behavior (ed. D. Ingle). Chicago: University of Chicago Press 1968
Beals, E.W., Riechert, S.E., Will-Wolf, S.: The use ordination in the analysis of niche space (unpublished manuscript)
Bierman, H., Bonini, C., Hausman, W.: Quantitative analysis for business decision. Homewood, Illinois: Irwin 1973
Bray, J.R., Curtis, J.T.: An ordination of the upland forest communities of southern Wisconsin. Ecol. Monogr. 27, 325–349 (1957)
Buskirk, R.E.: Agressive display and orb defense in a colonial spider, Metabus gravidus. Anim. Behav. 23, 560–567 (1975)
Curtis, J.T.: The vegetation of Wisconsin. Madison: University of Wisconsin Press 1959
Dijkstra, H.: Comparative research of the courtship behavior in the genus Pardosa (Arachn. Aranea): III. Agonistic behaviour in Pardosa armentata. Bull. Mus. Hist. Net. 41, 91–97 (1969)
Dingle, H.: Aggressive behavior in stomatopods and the use of information. In: Behavior of marine animals (ed. H.E. Winn, B.L. Olla). New York: Plenum 1972
Eibl-Eibesfeldt, I.: Ethology. The biology of behavior. New York. Holt: Rinehart and Winston 1970
Fentress, J.C.: Development and patterning of movement sequences in inbred mice. Oregon St. Univ. Ann. Biol. Coolq. 32, 83–132 (1972)
Ferguson, G.W.: Variation and evolution of the push-up displays of the side blotched lizards genus Uta (Iguanidae). Syst. Zool. 19, 79–101 (1970)
Harman, H.: Modern factor analysis. Chicago: The University of Chicago Press 1967
Hazlett, B.A.: Size relationships and aggressive behavior in the hermit crab Clibanarius vittatus. Tierpsychol. 25, 608–614 (1968)
Humphries, D.A., Driver, P.M.: Erratic display as a device against predators. Science 156, 1767–1768 (1967)
Humphries, D.A., Driver, P.M.: Protean defense by prey animals. Oecologia (Berl.) 5, 285–302 (1970)
Jenssen, T.A.: Display analysis of Anolis nebulosis (Sauria, Iquanidae). Copeia 2, 197–208 (1971)
King, J.A.: The ecology of aggressive behavior. Ann. Rev. Ecol. System 4, 117–138 (1973)
Kluyver, H.N., Tinbergen, L.: Territory and the regulation of density in titmice. Arch. Neerl. Zool. 10, 265–287 (1953)
Marler, P., Hamilton, W.J.: Mechanisms of animal behavior. New York: Wiley 1966
Maynard Smith, J.: The theory of games and the evolution of animal conflict. J. theor. Biol. 47, 209–221 (1974)
Maynard Smith, J.: Evolution and theory of games. Amer. Sci. 64, 41–45 (1976)
Maynard Smith, J., Parker, G.A.: The logic of asymmetric contests. Anim. Behav. 24, 159–175 (1976)
Maynard Smith, J., Price, G.R.: The logic of animal conflict. Nature 246, 15–18 (1973)
Nelson, K.: The temporal patterning of courtship behavior in the glandulocaudine fishes. Behaviour 24, 90–146 (1965)
Newmann, J. von, Morgenstern, O.: Theory of games and economic behavior. Princeton: Princeton University Press 1944
Parker, G.A.: Assessment strategy and the evolution of fighting behavior. J. theor. Biol. 47, 223–243 (1974)
Parker, G.A., Stuart, R.A.: Animal behavior as a strategy optimizer: evolution of resource assessment strategies and optimal emigration threshold. Amer. Natur. 110, 1055–1076 (1976)
Pielou, E.C.: Shannon's formula as a measure of species diversity: its use and misuse. Amer. Natur. 100, 463–465 (1966)
Rand, W.M., Rand, A.S.: Agonistic behavior in nesting iguanas: a stochastic analysis of dispute settlement dominated by the minimization of energy cost. Z. Tierpsychol. 40, 279–299 (1976)
Riechert, S.E.: Web-site selection in a desert spider, Agelenopsis aperta (Gertsch). Oikos 27, 311–315 (1976)
Riechert, S.E.: Energy-based territoriality in populations of the desert spider Agelenopsis aperta (Gertsch). J. Zool. Soc. (London) (in press)
Riechert, S.E., Reeder, W.G., Allen, T.F.: Patterns of spider distribution (Agelenopsis aperta) (Gertsch) in desert grassland and recent lava bed habitats, south-central New Mexico. J. Anim. Ecol. 42, 19–35 (1973)
Riechert, S.E., Tracy, C.R.: Thermal balance and prey availability: bases for a model relating web-site characteristics to spider reproductive success. Ecology 56, 265–284 (1975)
Ross, J.W.: Evidences for territoriality in the sheet line weaving spider, Florinda coccinea (Hentz) (Araneae; Linyphiidae). Ms. Thesis. University of Tennessee Knoxville (1977)
Rovner, J.S.: Territoriality in the sheet-web spider Linyphia triangulais (Clerck) (Araneae. Linyphidae). Z. Tierpsychol. 25, 232–242 (1968)
Rubenstein, D.I., Hazlett, B.A.: Examination of the agonistic behaviour of the crayfish Orconectes virilis by character analysis. Behaviour 50, 193–216 (1974)
Russell, W.M.S., Mead, A.P., Hayes, J.S.: A basis for the quantitative study of the structure of behaviour. Behaviour 6, 153–205 (1954)
Sinclair, M.E.: Agonistic behavior of the stone crab, Menippe mercenaria (Say). Anim. Behav. 25, 193–207 (1977)
Slater, P.J.B.: Describing sequences of behaviour. In: Perspectives in Ethology (eds. P.P.G. Bates, P.H. Klopfer). New York: Plenum 1973
Slater, P.J.B.: The temporal pattern of feeding in the zebra finch. Anim. Behav. 22, 506–515 (1974)
Stephenson, G.R., Smith, D.P., Roberts, T.W.: The SSR system. An open format event recording system with computerized transcription. Behav. Res. Meth. Instrumentation 7, 497–515 (1975)
Wiepkempa, P.R.: An ethological analysis of the reproductive behavior of the bitterling. Arch. Neerl. Zool. 14, 103–199
Wilcoxon, F.: Individual comparisons by ranking methods. Biometrics 1, 80–83 (1945)
Witt, P.N.: The web as a means of communication. Biosc. Commun. 1, 7–23 (1975)
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Riechert, S.E. Games spiders play: Behavioral variability in territorial disputes. Behav Ecol Sociobiol 3, 135–162 (1978). https://doi.org/10.1007/BF00294986
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DOI: https://doi.org/10.1007/BF00294986