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Titolo:
COSTS AND BENEFITS OF FACULTATIVE AGGREGATING BEHAVIOR IN THE ORB-SPINNING SPIDER GASTERACANTHA-MINAX THORELL (ARANEAE, ARANEIDAE)
Autore:
LLOYD NJ; ELGAR MA;
Indirizzi:
MONASH UNIV,DEPT ECOL & EVOLUT BIOL,WELLINGTON RD CLAYTON VIC 3168 AUSTRALIA UNIV MELBOURNE,DEPT ZOOL PARKVILLE VIC 3052 AUSTRALIA
Titolo Testata:
Australian journal of ecology
fascicolo: 3, volume: 22, anno: 1997,
pagine: 256 - 261
SICI:
0307-692X(1997)22:3<256:CABOFA>2.0.ZU;2-3
Fonte:
ISI
Lingua:
ENG
Soggetto:
WEB-BUILDING SPIDERS; CLAVIPES L ARANEAE; WEAVING SPIDER; SOCIAL SPIDER; COLONY SIZE; PREY AVAILABILITY; FORAGING SUCCESS; PREDATION RISK; MARINE INSECT; KLEPTOPARASITISM;
Keywords:
FORAGING; JEWEL SPIDER; PARASITISM; PREDATION RISK; REPRODUCTION; SILK PRODUCTION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
36
Recensione:
Indirizzi per estratti:
Citazione:
N.J. Lloyd e M.A. Elgar, "COSTS AND BENEFITS OF FACULTATIVE AGGREGATING BEHAVIOR IN THE ORB-SPINNING SPIDER GASTERACANTHA-MINAX THORELL (ARANEAE, ARANEIDAE)", Australian journal of ecology, 22(3), 1997, pp. 256-261

Abstract

The potential costs and benefits of foraging in aggregations are examined for the orb-spinning spider Gasteracantha minax. Web-site tenacity is low in this species; individuals frequently move among sites, thereby joining aggregations of different sizes. Female spiders in aggregations suffered lower predation rates and attracted more males than their solitary counterparts. However, aggregated eggsacs, probably produced by females in aggregations, experienced higher rates of parasitismthan solitary eggsacs. We found no evidence of higher prey capture success rates among spiders in aggregations. However, we demonstrate a novel way in which spiders can increase their foraging efficiency by decreasing silk investment. A spider spinning a web within an existing aggregation can attach the support threads of its web to those of otherwebs, thereby exploiting the silk produced by other spiders.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 02/12/20 alle ore 18:11:48