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Titolo:
PREDATOR-PREY RELATIONSHIPS IN A 2-SPECIES TOXICITY TEST SYSTEM
Autore:
HAMERS T; KROGH PH;
Indirizzi:
AGR UNIV WAGENINGEN,DEPT TOXICOL,POB 8000 NL-6700 EA WAGENINGEN NETHERLANDS MINIST ENVIRONM,NATL ENVIRONM RES INST DK-8600 SILKEBORG DENMARK
Titolo Testata:
Ecotoxicology and environmental safety
fascicolo: 3, volume: 37, anno: 1997,
pagine: 203 - 212
SICI:
0147-6513(1997)37:3<203:PRIA2T>2.0.ZU;2-G
Fonte:
ISI
Lingua:
ENG
Soggetto:
INSECTICIDE DIMETHOATE; CEREAL APHIDS; WINTER-WHEAT; COLLEMBOLA;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
15
Recensione:
Indirizzi per estratti:
Citazione:
T. Hamers e P.H. Krogh, "PREDATOR-PREY RELATIONSHIPS IN A 2-SPECIES TOXICITY TEST SYSTEM", Ecotoxicology and environmental safety, 37(3), 1997, pp. 203-212

Abstract

In a two-species toxicity test system survival and reproduction. of both the predator Hypoaspis aculeifer (Gamasida) and the prey Folsomia fimetaria (Collembola) were studied after 21 days of residual exposureto a soil contamination of the insecticide dimethoate, Additional experiments were run to analyze which species-species and compound-species relationships determine the outcome of this two-species experiment, Number of adult F. fimetaria were reduced by both predation and dimethoate exposure, whereas mites preyed less efficiently on adults than onjuveniles, At 0.357 mg dimethoate/kg soil, numbers of juvenile F. fimetaria were mainly reduced by predation on adults and juveniles, At 0.7 mg/kg, an additional dimethoate effect was found, which was attributed to an effect on the reproduction of F. fimetaria, mainly due to lethality of adults, It was reasoned that lethal effects on juvenile springtails are less important, Adult H. aculeifer was not affected by dimethoate exposure, whereas numbers of juvenile H. aculeifer demonstrated a decline only at the highest concentration of 0.7 mg/kg, It is hypothesized that this latter effect is possibly due to food depletion caused by a decreased availability of prey, rather than to the lethal effects of dimethoate on juvenile mites, Such a secondary effect of a pesticide application could not have been derived from a single-species toxicity experiment and demonstrates the additional value of a two-species toxicity test system. (C) 1997 Academic Press.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 25/09/20 alle ore 12:03:57