caa a22 4500 605541744 CHVBK 20210128100918.0 cr unu---uuuuu 210128e20150101xx s 000 0 eng 10.1007/s10071-014-0801-9 doi (NATIONALLICENCE)springer-10.1007/s10071-014-0801-9 Nephila clavipes spiders (Araneae: Nephilidae) keep track of captured prey counts: testing for a sense of numerosity in an orb-weaver [Elektronische Daten] [Rafael Rodríguez, R. Briceño, Eduardo Briceño-Aguilar, Gerlinde Höbel] Nephila clavipes golden orb-web spiders accumulate prey larders on their webs and search for them if they are removed from their web. Spiders that lose larger larders (i.e., spiders that lose larders consisting of more prey items) search for longer intervals, indicating that the spiders form memories of the size of the prey larders they have accumulated, and use those memories to regulate recovery efforts when the larders are pilfered. Here, we ask whether the spiders represent prey counts (i.e., numerosity) or a continuous integration of prey quantity (mass) in their memories. We manipulated larder sizes in treatments that varied in either prey size or prey numbers but were equivalent in total prey quantity (mass). We then removed the larders to elicit searching and used the spiders' searching behavior as an assay of their representations in memory. Searching increased with prey quantity (larder size) and did so more steeply with higher prey counts than with single prey of larger sizes. Thus, Nephila spiders seem to track prey quantity in two ways, but to attend more to prey numerosity. We discuss alternatives for continuous accumulator mechanisms that remain to be tested against the numerosity hypothesis, and the evolutionary and adaptive significance of evidence suggestive of numerosity in a sit-and-wait invertebrate predator. Springer-Verlag Berlin Heidelberg, 2014 Cognitive ecology nationallicence Counting nationallicence Food hoarding nationallicence Nephila nationallicence Web spider nationallicence Rodríguez Rafael Behavioral and Molecular Ecology Group, Department of Biological Sciences, University of Wisconsin-Milwaukee, Lapham Hall, 3209N. Maryland Ave., 53201, Milwaukee, WI, USA aut Briceño R. Escuela de Biología, Universidad de Costa Rica, 2060, San José, Costa Rica aut Briceño-Aguilar Eduardo Escuela de Biología, Universidad de Costa Rica, 2060, San José, Costa Rica aut Höbel Gerlinde Behavioral and Molecular Ecology Group, Department of Biological Sciences, University of Wisconsin-Milwaukee, Lapham Hall, 3209N. Maryland Ave., 53201, Milwaukee, WI, USA aut Animal Cognition Springer Berlin Heidelberg 18/1(2015-01-01), 307-314 1435-9448 18:1<307 2015 18 10071 https://doi.org/10.1007/s10071-014-0801-9 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10071-014-0801-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Rodríguez Rafael Behavioral and Molecular Ecology Group, Department of Biological Sciences, University of Wisconsin-Milwaukee, Lapham Hall, 3209N. Maryland Ave., 53201, Milwaukee, WI, USA aut NATIONALLICENCE 700 1- Briceño R. Escuela de Biología, Universidad de Costa Rica, 2060, San José, Costa Rica aut NATIONALLICENCE 700 1- Briceño-Aguilar Eduardo Escuela de Biología, Universidad de Costa Rica, 2060, San José, Costa Rica aut NATIONALLICENCE 700 1- Höbel Gerlinde Behavioral and Molecular Ecology Group, Department of Biological Sciences, University of Wisconsin-Milwaukee, Lapham Hall, 3209N. Maryland Ave., 53201, Milwaukee, WI, USA aut NATIONALLICENCE 773 0- Animal Cognition Springer Berlin Heidelberg 18/1(2015-01-01), 307-314 1435-9448 18:1<307 2015 18 10071