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Titolo:
OVIPOSITION AGGREGATION PHEROMONE IN THE SIMULIUM-DAMNOSUM COMPLEX
Autore:
MCCALL PJ;
Indirizzi:
UNIV LIVERPOOL,LIVERPOOL SCH TROP MED,DIV PARASITE & VECTOR BIOL,PEMBROKE PL LIVERPOOL L3 5QA MERSEYSIDE ENGLAND
Titolo Testata:
Medical and veterinary entomology
fascicolo: 2, volume: 9, anno: 1995,
pagine: 101 - 108
SICI:
0269-283X(1995)9:2<101:OAPITS>2.0.ZU;2-E
Fonte:
ISI
Lingua:
ENG
Soggetto:
SANDFLY LUTZOMYIA-LONGIPALPIS; QUINQUEFASCIATUS SAY DIPTERA; BEHAVIOR; IDENTIFICATION; SANCTIPAULI; ATTRACTANT; CULICIDAE; EGGS;
Keywords:
SIMULIUM DAMNOSUM; SIMULIIDAE; BLACKFLY; BIOASSAY; AGGREGATION PHEROMONE; SEMIOCHEMICAL; OVIPOSITION; ONCHOCERCIASIS; SIERRA LEONE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
33
Recensione:
Indirizzi per estratti:
Citazione:
P.J. Mccall, "OVIPOSITION AGGREGATION PHEROMONE IN THE SIMULIUM-DAMNOSUM COMPLEX", Medical and veterinary entomology, 9(2), 1995, pp. 101-108

Abstract

Communal oviposition by the Simulium damnosum complex of Afrotropicalblackflies (Diptera: Simuliidae) was investigated under controlled laboratory conditions, using wild-caught flies in Sierra Leone. Volatilecompounds emitted by Simulium eggs were trapped using a closed collection system, and their attractiveness to gravid flies was tested in a two-choice behavioural bioassay. Significantly more female blackflies oviposited on substrates baited with freshly laid eggs (100% chose thebaited substrate), or with the volatiles collected from freshly laid eggs (85% chose the baited substrate), in preference to the relevant control substrates. Substrates baited with volatiles from 12-h-old eggswere not significantly more attractive than controls (only 31% chose the baited substrates; P = 0.33). Gas chromatographic analysis of the egg volatiles consistently showed two peaks emanating from fresh eggs,but significantly lower amounts from 12-h-old eggs (P < 0.05). A novel system for collecting the volatiles from this and other blackfly species, as they laid eggs on a substrate in flowing water, is described. Volatiles collected using this method showed identical gas chromatographic profiles to those of fresh eggs alone, indicating that the fliesthemselves produced no other volatile chemical signals during oviposition. Evidently communal oviposition by S.damnosum s.l. was mediated by a pheromone emanating from fresh eggs. The role of pheromone-mediated egg aggregation in blackfly ecology is discussed, and its possible manipulation is considered.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 02/07/20 alle ore 18:16:40