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Titolo:
Argyrodes fissifrons inhabiting webs of Cyrtophora hosts: Prey size distribution and population characteristics
Autore:
Tso, IM; Severinghaus, LL;
Indirizzi:
Acad Sinica, Inst Zool, Taipei 115, Taiwan Acad Sinica Taipei Taiwan 115Acad Sinica, Inst Zool, Taipei 115, Taiwan Tunghai Univ, Dept Biol, Taichung 407, Taiwan Tunghai Univ Taichung Taiwan 407 i Univ, Dept Biol, Taichung 407, Taiwan
Titolo Testata:
ZOOLOGICAL STUDIES
fascicolo: 3, volume: 39, anno: 2000,
pagine: 236 - 242
SICI:
1021-5506(200007)39:3<236:AFIWOC>2.0.ZU;2-2
Fonte:
ISI
Lingua:
ENG
Soggetto:
KLEPTOPARASITIC SPIDER; ANTIPODIANA THERIDIIDAE; SOCIAL SPIDER; ARANEAE; BEHAVIOR;
Keywords:
Argyrodes; Cyrtophora; Orchid Island; spider;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
27
Recensione:
Indirizzi per estratti:
Indirizzo: Severinghaus, LL Acad Sinica, Inst Zool, Taipei 115, Taiwan Acad Sinica Taipei Taiwan 115 Zool, Taipei 115, Taiwan
Citazione:
I.M. Tso e L.L. Severinghaus, "Argyrodes fissifrons inhabiting webs of Cyrtophora hosts: Prey size distribution and population characteristics", ZOOL STUD, 39(3), 2000, pp. 236-242

Abstract

In this field study we investigated the impact of Argyrodes fissifrons (Araneae: Theridiidae) on two species of Cyrtophora spider hosts (Araneae: Araneidae) by studying several aspects of its population and foraging. We examined (1) if natural population variations of A. fissifrons occur with different web sizes of the hosts, (2) if A. fissifrons form long-term associations with particular hosts, and (3) if the size range of prey consumed by A. fissifrons overlaps with that of Cyrtophora hosts. Results from field surveys indicated that a positive relationship exists between the average numberof A. fissifrons and the size of the host webs. The number of A. fissifrons per host web per day changed daily, indicating the daily occurrence of immigration-emigration events. However, as inferred from monitoring marked A.fissifrons for 3 nights, some individuals form a long-term association with a particular host. The sex ratio, body size, and prey intake of A. fissifrons spiders staying in particular hosts' webs during monitoring did not differ from those that left a web. A significant difference was found in preysize distribution between Cyrtophora hosts and A. fissifrons, and the average prey size of the former was far greater than that of the latter. This result suggests that A. fissifrons scavenge an webs of Cyrtophora hosts by collecting smalt prey ignored by the hosts.

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Documento generato il 25/11/20 alle ore 10:07:11