Monteverde Institute: Tropical Ecology and Conservation

Alternative Title

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

Creator

Ashley Arthur

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Publication Date

November 2009

Abstract

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.

Resumen

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.

Keywords

Butterflies--Behavior, Passiflora, Cyanides, CIEE Fall 2009

Palabras claves

Mariposas--Comportamiento, CIEE Otoño 2009

Extent

12 pages

Geographic Location

Cerro Plano (Puntarenas, Costa Rica); Monteverde Butterfly Garden (Costa Rica)

Ubicación geográfica

Jardín de Mariposas Monteverde (Costa Rica)

Holding Location

Monteverde Institute

Language

English; Spanish

Media Type

Articles

Format

Digital Only

Identifier

M39-00540

Type

Book

Leaf choice in Dryas iulia (Nymphalidae Heliconiinae) cyanide content and toughness, November 2009

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