Abstract
Although a wide range of vertebrates have been considered in research on numerical competence, little is known about the role of number-related decisions in the predatory strategies of invertebrates. Here, we investigate how numerical competence is expressed in a highly specialized predatory strategy adopted by the small juveniles of Portia africana when practicing communal predation, with the prey being another spider, Oecobius amboseli. Two or more P. africana juveniles sometimes settle by the same oecobiid nest and then share the meal after one individual captures the oecobiid. Experiments were designed to clarify how these predators use number-related cues in conjunction with non-numerical cues when deciding whether to settle at a nest. We used lures (dead spiders positioned in lifelike posture) arranged in a series of 24 different scenes defined by the type, configuration and especially number of lures. On the whole, our findings suggest that P. africana juveniles base settling decisions on the specific number of already settled conspecific juveniles at the nest and express a preference for settling when the number is one instead of zero, two or three. By varying the size of the already settled juveniles and their positions around the nest, we show that factors related to continuous variables and stimulus configuration are unlikely explanations for our findings.
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Agrillo C, Dadda M, Serena G (2008) Do fish count? Spontaneous discrimination of quantity in female mosquitofish. Anim Cogn 11:495–503
Anderson DE, Vogel EK, Awh E (2011) Precision in visual working memory reaches a stable plateau when individual item limits are exceeded. J Neurosci 31:1128–1138
Awh E, Barton B, Vogel EK (2007) Visual working memory represents a fixed number of items regardless of complexity. Psychol Sci 18:622–628
Baddeley A (1986) Working memory. Oxford University Press, Oxford
Baddeley A (2003) Working memory: looking back and looking forward. Nat Rev Neurosci 4:829–839
Benson-Amram S, Heinen VK, Dryer SL, Holekamp KE (2011) Numerical assessment and individual call discrimination by wild spotted hyaenas, Crocuta crocuta. Anim Behav 82:743–752
Beran MJ (2001) Summation and numerousness judgments of sequentially presented sets of items by chimpanzees (Pan troglodytes). J Comp Psychol 115:181–191
Beran MJ (2008) Capuchin monkeys (Cebus apella) succeed in a test of quantity conservation. Anim Cogn 11:109–116
Beran MJ (2010) Chimpanzees (Pan troglodytes) accurately compare poured liquid quantities. Anim Cogn 13:641–649
Beran MJ, Evans TA, Harris EH (2008) Perception of food amounts by chimpanzees based on the number, size, contour length and visibility of items. Anim Behav 75:1793–1802
Boysen ST, Berntson GG (1989) Numerical competence in a chimpanzee (Pan troglodytes). J Comp Psychol 103:23–31
Boysen ST, Berntson GG (1995) Responses to quantity: perceptual versus cognitive mechanisms in chimpanzees (Pan troglodytes). J Exp Psychol Anim Behav Process 21:82–86
Brady TF, Konkle T, Alvarez GA (2011) A review of visual memory capacity: beyond individual items and toward structured representations. J Vis 11:1–34
Brannon EM (2002) The development of ordinal numerical knowledge in infancy. Cognition 83:223–240
Brannon EM (2006) The representation of numerical magnitude. Curr Opin Neurobiol 16:222–229
Brannon EM, Abbott S, Lutz DJ (2004) Number bias for the discrimination of large visual sets in infancy. Cognition 93:B59–B68
Breukelaar JWC, Dalrymple-Alford JC (1998) Timing ability and numerical competence in rats. J Exp Psychol 24:84–97
Burr DC, Ross J (2008) A visual sense of number. Curr Biol 18:425–428
Burr DC, Turi M, Anobile G (2010) Subitizing but not estimation of numerosity requires attentional resources. J Vis 10(6):1–10
Butterworth B (1999) A head for figures. Science 284:928–929
Butterworth B (2008) Numerosity perception: how many speckles on the hen? Curr Biol 16:R388–R389
Cantlon JF, Brannon EM (2007) Basic math in monkeys and college students. PLoS ONE 5:e328
Carazo P, Font E, Forteza-Behrendt E (2009) Quantity discrimination in Tenebrio molitor: evidence of numerosity discrimination in an invertebrate? Anim Cogn 12:463–470
Carey S (1998) Knowledge of number: its evolution and ontogeny. Science 282:641–642
Carey S (2001) Cognitive foundations of arithmetic: evolution and ontogenesis. Mind Lang 16:37–55
Castelli F, Glaser DE, Butterworth B (2006) Discrete and analogue quantity processing in the parietal lobe: a functional MRI study. Proc Nat Acad Sci USA 103:4693–4698
Charnov EL (1976) Optimal foraging, the marginal value theorem. Theor Popul Biol 9:129–136
Chittka L, Geiger K (1995) Can honey-bees count landmarks? Anim Behav 49:159–164
Church RM, Broadbent HA (1990) Alternative representations of time, number, and rate. Cognition 37:55–81
Clearfield MW, Mix KS (1999) Number versus contour length in infants’ discrimination of small visual sets. Psychol Sci 10:408–411
Cowan N (1998) Visual and auditory working memory capacity. Trends Cogn Sci 2:77–78
Cowan N (2000) The magical number 4 in short-term memory: a reconsideration of mental storage capacity. Behav Brain Sci 24:87–185
Cowan N (2010) The magical mystery four: how is working memory capacity limited, and why? Curr Dir Psychol Sci 19:51–57
Curio E (1976) The ethology of predation. Springer, Berlin
Dacke M, Srinivasan MV (2008) Evidence for counting in insects. Anim Cogn 11:683–689
Dadda M, Piffer L, Agrillo C, Biazza A (2009) Spontaneous number representation in mosquitofish. Cognition 112:343–348
Davis H, Memmott J (1982) Counting behavior in animals: a critical evaluation. Psychol Bull 92:547–571
Davis H, MacKenzie KA, Morrison S (1989) Numerical discrimination by rats (Rattus norvegicus) using body and vibrissal touch. J Comp Psychol 103:45–53
Dehaene S (1992) Varieties of numerical abilities. Cognition 44:1–42
Dehaene S (2001) Precis of the number sense. Mind Lang 16:16–36
Feigenson L, Dehaene S, Spelke E (2004) Core systems of number. Trends Cogn Sci 8:307–314
Flombaum JI, Junge JA, Hauser MD (2005) Rhesus monkeys (Macaca mulatta) spontaneously compute addition operations over large numbers. Cognition 97:315–325
Fougnie D, Marois R (2011) Distinct capacity limits for attention and working memory. Psychol Sci 17:526–534
Franks NR, Dornhaus A, Metherell BG, Nelson TR, Lanfear SAJ, Symes WS (2006) Not everything that counts can be counted: ants use multiple metrics for a single nest trait. Proc R Soc B 273:165–169
Gallistel CR, Gelman R (2000) Non-verbal numerical cognition: from reals to integers. Trends Cogn Sci 4:59–65
Gelman R, Gallistel CR (1978) The child’s understanding of number. Harvard University Press, Cambridge, MA
Giaquinto M (2001) What cognitive systems underlie arithmetical abilities? Mind Lang 16:56–68
Gross HJ, Pahl M, Si A, Zhu H, Tautz J, Zhang S (2009) Number-based visual generalisation in the honeybee. PLoS ONE 4(1):e4263
Hager MC, Helfman GS (1991) Safety in numbers: shoal size choice by minnows under predatory threat. Behav Ecol Sociobiol 29:271–276
Hanus D, Call J (2007) Discrete quantity judgments in the great apes (Pan paniscus, Pan troglodytes, Gorilla gorilla, Pongo pygmaeus): the effect of presenting whole sets versus item-by-item. J Comp Psychol 121:241–249
Harland DP, Jackson RR (2001) Prey classification by Portia fimbriata, a salticid spider that specializes at preying on other salticids: species that elicit cryptic stalking. J Zool 255:445–460
Haun DBM, Jordan FM, Vallortigara G, Clayton NS (2010) Origins of spatial, temporal and numerical cognition: insights from comparative psychology. Trends Cog Sci 14:552–560
Hauser MD, Carey S (2003) Spontaneous representations of small numbers of objects by rhesus macaques: examination of content and format. Cognit Psychol 47:367–491
Hoare DJ, Couzin ID, Godin GJ, Krause J (2004) Context-dependent group size choice in fish. Anim Behav 67:155–164
Hunt S, Low J, Burns KC (2008) Adaptive numerical competency in a food-hoarding songbird. Proc R Soc B 275:2373–2379
Hurewitz F, Gelman R, Schnitzer B (2006) Sometimes area counts more than number. Proc Nat Acad Sci USA 103:19599–19604
Jackson RR, Cross FR (2011) Spider cognition. Adv Insect Physiol 41:115–174
Jackson RR, Nelson XJ (2012) Attending to detail by communal spider-eating spiders. Anim Cogn (in press). doi:10.1007/s10071-012-0469-y
Jackson RR, Pollard SD, Salm K (2008) Observations of Portia africana, an araneophagic jumping spider, living together and sharing prey. N Z J Zool 35:237–242
Jakob EM, Christa D, Skow CD, Long S (2011) Plasticity, learning and cognition. In: Herberstein ME (ed) Spider behaviour: flexibility and versatility. Cambridge University Press, New York, pp 307–347
Kahneman D, Treisman A, Gibbs BJ (1992) The reviewing of object files: object-specific integration of information. Cognit Psychol 24:175–219
Kaufman EL, Lord MW, Reese TW, Volkmann J (1949) The discrimination of visual number. Am J Psychol 62:498–525
Kitchen DM (2006) Alpha male black howler monkey responses to loud calls: effect of numeric odds, male companion behaviour and reproductive investment. Anim Behav 67:125–139
Kobayashi T, Hiraki K, Mugitani R, Hasegawa T (2004) Baby arithmetic: one object plus one tone. Cognition 91:B23–B34
Krusche P, Uller C, Dicke U (2010) Quantity discrimination in salamanders. J Exp Biol 213:1822–1828
Le Corre M, Carey S (2008) Why the verbal counting principles are constructed out of representations of small sets of individuals: a reply to Gallistel. Cognition 107:650–662
Lipton JS, Spelke ES (2003) Origins of number sense: large-number discrimination in human infants. Psychol Sci 14:396–401
Lyon BE (2003) Egg recognition and counting reduce costs of avian conspecific brood parasitism. Nature 422:495–499
Mandler G, Shebo BJ (1982) Subitizing: an analysis of its conceptual processes. J Exp Psychol 111:1–22
Matsuzawa T (1985) Use of numbers by a chimpanzee. Nature 315:57–59
McComb K, Packer C, Pusey A (1994) Roaring and numerical assessment in contests between groups of lions, Panthera leo. Anim Behav 47:379–387
McCrink K, Wynn K (2004) Large-number addition and subtraction by 9-month-old infants. Psychol Sci 15:776–781
Meck WH, Church RM (1983) A mode control model of counting and timing processes. J Exp Psychol Anim Behav Process 9:320–334
Nelson XJ, Jackson RR (2011) Flexibility in the foraging strategies of spiders. In: Herberstein ME (ed) Spider behaviour: flexibility and versatility. Cambridge University Press, New York, pp 31–56
Owen AM (2004) Working memory: imaging the magic number four. Curr Biol 14:R573–R574
Pepperberg IM (2006) Grey parrot numerical competence: a review. Anim Cogn 9:377–391
Piazza M, Mechelli A, Butterworth B, Price CJ (2002) Are subitizing and counting implemented as separate or functionally overlapping processes? NeuroImage 15:435–446
Piazza M, Fumarola A, Chinello A, Melcher D (2011) Subitizing reflects visuo-spatial object individuation capacity. Cognition 121:147–153
Pyke GH, Pulliam HR, Charnov EL (1977) Optimal foraging: a selective review of theory and tests. Q Rev Biol 52:137–154
Pylyshyn ZW (1989) The role of location indexes in spatial perception: a sketch of the FINST spatial-index model. Cognition 32:65–97
Pylyshyn ZW (2001) Visual indexes, preconceptual objects, and situated vision. Cognition 80:127–158
Railo H, Koivisto M, Revonsuo A, Hannula MM (2008) The role of attention in subitizing. Cognition 107:82–104
Reznikova Z, Ryabko B (2011) Numerical competence in animals, with an insight from ants. Behaviour 148:405–434
Riggs KJ, Ferrand L, Lancelin D, Fryziel L, Dumur G (2006) Subitizing in tactile perception. Psychol Sci 17:271–272
Rodríguez RL, Gamboa E (2000) Memory of captured prey in three web spiders (Araneae: Araneidae, Linyphiidae, Tetragnathidae). Anim Cogn 3:91–97
Rodríguez RL, Gloudeman MD (2011) Estimating the repeatability of memories of captured prey formed by Frontinella communis spiders (Araneae: Linyphiidae). Anim Cogn 14:675–682
Rosch E (1975) Cognitive representations of semantic categories. J Exp Psychol 104:192–233
Rosch E, Mervis CB, Greay WD, Jonhson DM, Boyes-Braem P (1976) Basic objects in natural categories. Cognit Psychol 8:382–429
Schmitt V, Fischer J (2011) Representational format determines numerical competence in monkeys. Nat Commun 2:257. doi:10.1038/ncomms1262
Seron X, Pesenti M (2001) The number sense theory needs more empirical evidence. Mind Lang 16:76–88
Shettleworth SJ (2009) Cognition, evolution, and behaviour, 2nd edn. Oxford University Press, New York
Slaughter V, Itakura S, Kutsuki A, Siegal M (2011) Learning to count begins in infancy: evidence from 18 month olds’ visual preferences. Proc R Soc B 278:2979–2984
Starkey P, Spelke ES, Gelman R (1983) Detection of intermodal numerical correspondences by human infants. Science 222:179–181
Stephens DW, Krebs JR (1986) Foraging theory. Princeton University Press, Princeton
Tardif SD, Layne DG, Smucny DA (2002) Can marmoset mothers count to three? Effect of litter size on mother-infant interactions. Ethology 108:825–836
Terrell DF, Thomas RK (1990) Number-related discrimination and summation by squirrel monkeys (Saimiri sciureus sciureus and S. boliviensus boliviensus) on the basis of the number of sides of polygons. J Comp Psychol 104:238–247
Thomas RK, Simmons LW (2010) Cuticular hydrocarbons influence female attractiveness to males in the Australian field cricket, Teleogryllus oceanicus. J Evol Biol 23:707–714
Tomonaga M (2008) Relative numerosity discrimination by chimpanzees (Pan troglodytes): evidence for approximate numerical representations. Anim Cogn 11:43–57
Treisman AM, Gelade G (1980) A feature integration theory of attention. Cogn Psychol 12:97–136
Trick LM (2005) The role of working memory in spatial enumeration: patterns of selective interference in subitizing and counting. Psychon Bull Rev 12:675–681
Trick LM, Pylyshyn ZW (1994) Why are small and large numbers enumerated differently? A limited-capacity preattentive stage in vision. Psychol Rev 101:80–102
Uller C, Hauser MD, Carey S (2001) Spontaneous representation of number in cotton-top tamarins. J Comp Psychol 115:1–10
Uller C, Jaeger R, Guidry G, Martin C (2003) Salamanders (Plethodon cinereus) go for more: rudiments of number in a species of basal vertebrate. Anim Cogn 6:105–112
Wesley F (1961) The number concept: a phylogenetic review. Psychol Bull 53:420–428
Wood JN, Hauser MC, Glynn DD, Barner D (2007) Free-ranging rhesus monkeys spontaneously individuate and enumerate small numbers of non-solid portions. Cognition 106:207–221
Wynn K (1992) Addition and subtraction by human infants. Nature 358:749–750
Wynn K (1998) Psychological foundations of number: numerical competence in human infants. Trends Cogn Sci 2:296–303
Xu Y, Chun MM (2009) Selecting and perceiving multiple visual objects. Trends Cogn Sci 13:167–174
Xu Y, Spelke ES (2000) Large number discrimination in 6-month-old infants. Cognition 74:B1–B11
Acknowledgments
Godfrey Otieno Sune, Stephen Aluoch and Jane Atieno Obonyo provided invaluable technical assistance. We acknowledge financial support from the National Geographic Society (RRJ), the Royal Society of New Zealand (Marsden Fund; RRJ; James Cook Fellowship, RRJ).
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Nelson, X.J., Jackson, R.R. The role of numerical competence in a specialized predatory strategy of an araneophagic spider. Anim Cogn 15, 699–710 (2012). https://doi.org/10.1007/s10071-012-0498-6
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DOI: https://doi.org/10.1007/s10071-012-0498-6