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Titolo:
EXPERIMENTAL-STUDY OF FOUNDATION AND DEVELOPMENT OF ANELOSIMUS-EXIMIUS COLONIES IN THE TROPICAL FOREST OF FRENCH-GUIANA
Autore:
LEBORGNE R; KRAFFT B; PASQUET A;
Indirizzi:
UNIV NANCY 1,BIOL COMPORTEMENT & PHYSIOL LAB,BP 239 F-54506 VANDOEUVRE NANCY FRANCE
Titolo Testata:
Insectes sociaux
fascicolo: 2, volume: 41, anno: 1994,
pagine: 179 - 189
SICI:
0020-1812(1994)41:2<179:EOFADO>2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Soggetto:
SPIDER STEGODYPHUS-MIMOSARUM; SOCIAL SPIDER; PREY AVAILABILITY; AGELENA-CONSOCIATA; FORAGING SUCCESS; ARANEAE; THERIDIIDAE; BEHAVIOR; SOLITARY;
Keywords:
COLONY GROWTH; SURVIVORSHIP; SOCIAL SPIDERS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
22
Recensione:
Indirizzi per estratti:
Citazione:
R. Leborgne et al., "EXPERIMENTAL-STUDY OF FOUNDATION AND DEVELOPMENT OF ANELOSIMUS-EXIMIUS COLONIES IN THE TROPICAL FOREST OF FRENCH-GUIANA", Insectes sociaux, 41(2), 1994, pp. 179-189

Abstract

Possibilities for new colony foundation in Anelosimus eximius (Theridiidae) were tested with isolated females (both with and without egg sacs) and with groups of individuals (groups from 150 to 250 spiders). Experimental groups were deposited in three different habitats: within the forest, on the forest edge (where natural colonies develop most frequently) and outside the forest (low savannah or areas cleared of vegetation, but in which plant life had started to grow back between the path and the forest edge). Isolated adult females had very low founding success: less than 13 % settled and spun a web; the presence of an egg sac provided by investigators was not an influencing factor. Webs of isolated females had the same architectures as those of colonies with several hundreds of individuals. This web was a horizontal sheet linked to a thick vertical network of threads. All groups of 150 to 250 spiders established colonies in appropriate habitats. The colonies outside the forest, and more than 90 % of the colonies along the forest edges successfully developed during the one month observation period. Conversely, 35 % of the colonies in the forest disappeared either a few days after being placed there, or one or two weeks after. In the latter case, spiders apparently left their webs, and all silk structures were left intact. No dead spiders were found in the webs. Average web surface areas increased in all colony types with age, except for those placed in the forest. In these colonies, the number of individuals decreased, and there were fewer egg sacs than in the colonies placed outside the forest. Results are discussed with regard to natural colony distribution along open paths and to the dispersive characteristics of this spider species.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 25/11/20 alle ore 09:22:29