Interspecific differences in Aethia spp. auklet odorants and evidence for chemical defense against ectoparasites.

摘要: The true auklets (Genus Aethia) are small planktivorous seabirds of the Bering Sea and North Pacific. Two species, crested whiskered produce volatile citrus-like odorants. We here show that auklet odorant is composed predominantly two odd-numbered aldehydes (heptanal nonanal) with no detectable unsaturated aldehydes. By comparison dominated by even-numbered aldehydes, both saturated monounsaturated, ranging in size from 6 to 12 carbons. This evidence species-specific acquisition or biosynthetic pathways. clarify chemistry odorant. cite C-12:1 aldehyde actually isomers, (Z)-4-dodecenal (Z)-6-dodecenal. also report on experimental constituents kill repel ectoparasites. Efficacy may increase when they combined a mixture. repellency mixture increases chemical concentration. suggests individuals higher production likely ectoparasites more effectively.