Tropical Ecology and Conservation [Monteverde Institute]

Alternative Title

Elección de la hoja en Dryas iulia (Nymphalidae Heliconiinae) contenido de cianuro y dureza


Ashley Arthur



Download Full Text (559 KB)

Publication Date

November 2009


Vines in the Passifloraceae synthesize cyanogenic glycosides that deter general herbivores, but Heliconiinae butterfly larvae such as Dryas iulia have overcome this and utilize Passiflora leaves as larval food. Ovipositing adult females and larvae may access the suitability of leaves caused by various plant defenses such as cyanide content and leaf toughness. D. iulia adult females show no preference in cyanide content (9.01μg ± 28.3, 5.77μg ± 12.6) or toughness (238.67g ± 78.4, 266.58g ± 123.1) for ovipostion, yet larvae prefer leaves with a significantly lower cyanide content (9.01μg ± 28.3, 0.47μg ± 0.51) then the average available leaf but average toughness (238.67g ± 78.4, 227.23g ± 80.7). This indicates that larvae are assessing plants to maximize fitness and D. iulia ovipositon is determined by more factors then simply Passiflora leaf cyanide content and toughness. Las lianas en la familia Passifloraceae sintetizan glucosas de cianuro que disuaden a los herbívoros, pero las larvas de la subfamilia Heliconiinae como Dryas iulia pueden comer las hojas de Passiflora. Es posible que las hembras adultas y las larvas puedan evaluar la presencia de varias defensas en las hojas como el cianuro y el grosor. Las hembras de D. iulia no muestran preferencia en el contenido de cianuro (9.01μg ± 28.3, 5.77μg ± 12.6) o grosor (238.67g ± 78.4, 266.58g ± 123.1) para la ovoposición (t=1.02; p=0.307; df=67), aun así las larvas prefieren las hojas con significativamente menor contenido de cianuro que las hojas promedio (9.01μg ± 28.3, 0.47μg ± 0.51) y grosor promedio (238.67g ± 78.4, 227.23g ± 80.7). Esto indica que las larvas están evaluando las plantas para incrementar el éxito reproductivo y la ovoposición de D. iulia está determinada por más factores que simplemente el contenido de cianuro y el grosor de Passiflora.


Butterflies--Behavior, Mariposas--Comportamiento, Passiflora, Cyanides, Costa Rica--Puntarenas--Monteverde Zone--Cerro Plano, Costa Rica--Puntarenas--Zona de Monteverde--Cerro Plano, Monteverde Butterfly Garden (Costa Rica), Jardin de Mariposas Monteverde (Costa Rica), CIEE Fall 2009, CIEE Otoño 2009


Student affiliation : Department of Genetics, University of Wisconsin-Madison Born Digital

Subject: topical

Butterflies--Behavior; Mariposas--Comportamiento; Passiflora; Cyanides; CIEE Fall 2009; CIEE Otoño 2009

Subject: geographic

Costa Rica--Puntarenas--Monteverde Zone--Cerro Plano; Costa Rica--Puntarenas--Zona de Monteverde--Cerro Plano; Monteverde Butterfly Garden (Costa Rica); Jardin de Mariposas Monteverde (Costa Rica)



Holding Location

Monteverde Institute MVI



Leaf choice in Dryas iulia (Nymphalidae Heliconiinae) cyanide content and toughness



To view the content in your browser, please download Adobe Reader or, alternately,
you may Download the file to your hard drive.

NOTE: The latest versions of Adobe Reader do not support viewing PDF files within Firefox on Mac OS and if you are using a modern (Intel) Mac, there is no official plugin for viewing PDF files within the browser window.