Does pheromone biology of Lambdina athasaria and L-pellucidaria contributeto their reproductive isolation?

Citation
Cm. Duff et al., Does pheromone biology of Lambdina athasaria and L-pellucidaria contributeto their reproductive isolation?, J CHEM ECOL, 27(3), 2001, pp. 431-442
Citations number
16
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Environment/Ecology
Journal title
JOURNAL OF CHEMICAL ECOLOGY
ISSN journal
0098-0331 → ACNP
Volume
27
Issue
3
Year of publication
2001
Pages
431 - 442
Database
ISI
SICI code
0098-0331(200103)27:3<431:DPBOLA>2.0.ZU;2-C
Abstract
Recently, 7-methylheptadecane and 7,11-dimethylheptadecane have been report ed as sex pheromone components of both spring hemlock looper (SHL), Lambdin a athasaria, and pitch pine looper (PPL), Lambdina pellucidaria. Our object ive was to test the hypothesis that SHL and PPL are reproductively isolated , in part, through species specificity in: (1) absolute configuration of ph eromone components, (2) diel periodicity of pheromonal communication, and/o r (3) seasonal flight period. In coupled pas chromatographic-electroantenno graphic detection (GC-EAD) analyses of stereoselectively synthesized (7S)- and (7R)-7-methylheptadecane [7S; 7R] as well as (7S,11S)-, (7R,11R)-, and (meso-7,11)-7,11-dimethylheptadecane [7S,11S; 7R,11R, meso-7,11], only 7S a nd mese-7,11 elicited responses by male SHL and PPL antennae. In field expe riments, male SHL and PPL were attracted only to lures containing 7S plus m eso-7,11. In hourly recordings of trap-captured males, SHL and PPL in their respective habitats were trapped between 24:00 and 03:00 hr. Capture of bo th SHL and PPL in pheromone-baited traps throughout June indicated overlapp ing seasonal Eight periods. These findings of identical absolute configurat ion of pheromoal components, diel periodicity of pheromonal communication, and overlap of seasonal flight periods support synonymy of SHL and PPL. Fin ite taxonomic classification of PPL and SHL must await careful assessment o f further criteria. such as morphometrics, molecular comparisons and ecolog ical analyses.