INVESTIGADORES
QUINTERO carolina
congresos y reuniones científicas
Título:
Within and between year variation in chemical defense of two Checkerspot butterflies
Autor/es:
BOWERS MD, A HILL, F DRACHENBERG, C QUINTERO
Lugar:
New Haven
Reunión:
Congreso; 60th Annual Meeting of the Lepidopterists' Society; 2011
Institución organizadora:
Yale University
Resumen:
For insects that protect themselves by the production or sequestration
of defensive chemicals, individuals may vary substantially in the
amounts they contain. Certain checkerspot butterflies have the ability
to sequester iridoid glycosides from their host plants and are therefore
unpalatable. Euphydryas anicia and Poladryas arachne
(Nymphalidae) co-occur at Crescent Meadows, Boulder County,
Colorado. Females oviposit on two species of Penstemon, P.
virgatus and P. glaber (Plantaginaceae). We sampled individuals of
these species from 1998 to 2009 and found that iridoid glycosides in
these butterflies varied significantly by year (with means ranging
from 2.5 to 6% dry weight) and that the two species differed in the
amounts of iridoid glycosides they contained. Thus palatability of
individuals may vary substantially from one year to the next.
