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Titolo:
THE BENEFITS OF STEALING FROM A PREDATOR - FORAGING RATES, PREDATION RISK, AND INTRASPECIFIC AGGRESSION IN THE KLEPTOPARASITIC SPIDER ARGYRODES ANTIPODIANA
Autore:
WHITEHOUSE MEA;
Indirizzi:
BEN GURION UNIV NEGEV,JACOB BLAUSTEIN INST DESERT RES,MITRANI CTR DESERT ECOL IL-84990 MEDRESHET BEN GU ISRAEL UNIV CANTERBURY,DEPT ZOOL CHRISTCHURCH 1 NEW ZEALAND
Titolo Testata:
Behavioral ecology
fascicolo: 6, volume: 8, anno: 1997,
pagine: 663 - 667
SICI:
1045-2249(1997)8:6<663:TBOSFA>2.0.ZU;2-2
Fonte:
ISI
Lingua:
ENG
Soggetto:
NEW-ZEALAND; SPECIES INTERACTIONS; SOCIAL SPIDER; PATCH USE; THERIDIIDAE; ARANEAE; BEHAVIOR; COMPETITION; ENVIRONMENT; ADAPTATION;
Keywords:
ARGYRODES ANTIPODIANA; FORAGING; INTRASPECIFIC AGGRESSION; KLEPTOPARASITE; PREDATION RISK; SPIDER; TRADE-OFFS;
Tipo documento:
Article
Natura:
Periodico
Citazioni:
41
Recensione:
Indirizzi per estratti:
Citazione:
M.E.A. Whitehouse, "THE BENEFITS OF STEALING FROM A PREDATOR - FORAGING RATES, PREDATION RISK, AND INTRASPECIFIC AGGRESSION IN THE KLEPTOPARASITIC SPIDER ARGYRODES ANTIPODIANA", Behavioral ecology, 8(6), 1997, pp. 663-667

Abstract

In the trade-off between food and safety, the role of aggressive intraspecific interactions has not been extensively examined. Here I present information on this system using a kleptoparasitic spider, Argyrodes antipodiana, and its host spider and potential predator, Eriophora pustulosa. A. antipodiana can feed either at a potentially dangerous site (the hub of its host's web with the host), or at a relatively safe site (on food bundles around the edge of the host's web). I found thatA. antipodiana can gain food very quickly when feeding with the host,apparently by exploiting the host's ability to digest the prey. Thus A. antipodiana follows predictions based on foraging models in that itaccepts a higher predation risk at the hub because of the higher foodpayoff. A. antipodiana also aggressively competes for access to more food. However, aggressive competition increases the predation risk from the host, especially at the hub where the host is very close. Consequently, A. antipodiana modifies its level of intraspecific aggressiveness in accordance with its position on the web: at the hub where the cost of aggression is high (due to predation risk), A. antipodiana reduces its aggressiveness, but it is aggressive away from the hub when competing for food bundles. The ability of A. antipodiana to change interaction intensity as a function of its position on the web enables it to exploit a rich, but risky, food source and provides a new angle forexamining food and safety trade offs in light of intraspecific competition for food.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 25/11/20 alle ore 09:58:55