Intraspecific signals inducing aggregation in Periplaneta americana (L.) (Insecta: Dictyoptera) - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Environmental Entomology Année : 2015

Intraspecific signals inducing aggregation in Periplaneta americana (L.) (Insecta: Dictyoptera)

Résumé

Chemical communication is necessary to induce aggregation and to maintain the cohesion of aggregates in Periplaneta americana (L.) cockroaches. We aimed to identify the chemical message inducing aggregation in this species. Two types of bioassays were used—binary choice tests in Petri dishes and tests in Y-olfactometer. Papers conditioned by direct contact of conspecifics induce aggregation when proposed in binary choice tests and were attractive in a Y-olfactometer. The identification of the molecules present on these conditioned papers indicated that dichloromethane extracts contained mainly cuticular hydrocarbons whereas methanol extracts contained more volatile molecules. Only a mixture of extracts in both solvents induced aggregation. High concentrations of cuticular hydrocarbons are necessary to induce aggregation when presented alone. When presented with volatile molecules present in methanol extracts, low concentrations of cuticular hydrocarbons are sufficient to induce aggregation if they are presented in contact. Among volatile molecules collected on filter paper, a mixture of three compounds—hexadecanoic acid, pentadecanoic acid, and pentaethylene glycol—induced aggregation. Our results provide evidence that aggregation processes in P. americana relies on a dual mechanism: attraction over long distances by three volatile molecules and maintenance on site by contact with cuticular hydrocarbons.
Fichier principal
Vignette du fichier
Intraspecific Signals Inducing Aggregation_accepted.pdf (366.18 Ko) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-01305661 , version 1 (21-07-2016)

Identifiants

Citer

Imen Saïd, Christian Malosse, Virginie Durier, Colette Rivault. Intraspecific signals inducing aggregation in Periplaneta americana (L.) (Insecta: Dictyoptera). Environmental Entomology, 2015, 44 (3), pp.713-723. ⟨10.1093/ee/nvv035⟩. ⟨hal-01305661⟩
74 Consultations
206 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More