Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
WEB COSTS AND WEB DEFENSE IN THE PARSNIP WEBWORM (LEPIDOPTERA, OECOPHORIDAE)
Autore:
BERENBAUM MR; GREEN ES; ZANGERL AR;
Indirizzi:
UNIV ILLINOIS,DEPT ENTOMOL,320 MORRILL HALL,505 S GOODWIN URBANA IL 61801
Titolo Testata:
Environmental entomology
fascicolo: 4, volume: 22, anno: 1993,
pagine: 791 - 795
SICI:
0046-225X(1993)22:4<791:WCAWDI>2.0.ZU;2-N
Fonte:
ISI
Lingua:
ENG
Soggetto:
DEPRESSARIA-PASTINACELLA; WILD PARSNIP; HERBIVORE; SILK;
Keywords:
DEPRESSARIA-PASTINACELLA; SILK; COST;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
21
Recensione:
Indirizzi per estratti:
Citazione:
M.R. Berenbaum et al., "WEB COSTS AND WEB DEFENSE IN THE PARSNIP WEBWORM (LEPIDOPTERA, OECOPHORIDAE)", Environmental entomology, 22(4), 1993, pp. 791-795

Abstract

The parsnip webworm, Depressaria pastinacella (Duponchel), webs together developing umbels of its host plant, Pastinaca sativa L., throughout the course of its larval life. We estimated energetic, time, and material costs of web-spinning behavior for this species. Webworms spentalmost-equal-to one-third of their time spinning silk; of digested food biomass not expended on respiration, one-fourth was incorporated into silk, and almost 18% of ingested nitrogen was incorporated into silk. Three experiments examined webworm behavior with respect to occupied and unoccupied webs. Caterpillars displaced from their webs occupiedempty webs provided to them 87.5% of the time instead of spinning newwebs. Moreover, webworms defended their webs against usurping conspecifics. Of 63 staged interactions between web occupants and intruders, 52 were initiated by the residents, and all but one resident successfully defended the web. Finally, when larvae were displaced from their own webs and ''squatters'' installed, aggressive attacks were equally likely to be initiated by web-builders and squatters. These behaviors are consistent with a high cost of web building because costs and risksassociated with aggressive defense of a web presumably do not exceed those expended in constructing a new web or in being without a web.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 27/11/20 alle ore 13:57:11