Tropical Ecology and Conservation [Monteverde Institute]

Alternative Title

Los efectos de Xanthosoma spp. (Araceae) en la temperatura, el olor, y las flores de frecuencia de apareamiento de Cyclocephala sexpunctata (Scarabaeidae)

Files

Download

Download Full Text (138 KB)

Publication Date

May 2009

Abstract

Many pollinators have evolved very specified obligate mutualisms with the plants that they pollinate. One example of this kind of mutualism, in which the reproduction of both organisms relies on their relationship, is Xanthosoma spp. and Cyclocephala sexpunctata in Monteverde, Costa Rica. Xanthosoma spp. thermoregulate, attracting beetles because of a combination of heat, scent, and visual components of the inflorescence. The beetles crawl inside of the spathe and spadix inflorescence, where they both eat and mate. The specific stimuli that prompt the beetles to mate once inside the flower had not yet been widely examined. Through my experiments, I found that heat was the only factor that had a significant positive affect on mating frequency, as well as on the level of activity exhibited by beetles. The presence of flowers and the presence of scent did not have significant affects on mating frequency or activity. In addition, I was able to estimate that in a patch of 214 mature Xanthosoma spp., the population of males was about 200.6 individuals. About half as many females were captured, but an accurate estimate of female population could not be calculated because they were either not always present in inflorescences or they traveled farther to different patches more often than did males. These results add to a relatively small body of knowledge concerning this fascinating relationship between Araceae plants and their Scarabaeidae pollinators, and are important to understanding complex reproductive mutualisms. Varios polinizadores han evolucionado mutualismos obligados de forma muy específica con las plantas que ellos polinizan. Un ejemplo de esta clase de mutualismo, en el cual la reproducción de ambos organismos depende de esta relación es entre Xanthosoma spp. y Cyclocephala sexpunctata en Monteverde, Costa Rica. Xanthosoma spp. termo regula, atrayendo a los escarabajos debido a una combinación de calor, olor, y los componentes visuales de la inflorescencia.

Keywords

Araceae--Pollen, Araceae--Polen, Scarabaeidae, Costa Rica--Puntarenas--Monteverde Zone, Costa Rica--Puntarenas--Zona de Monteverde, CIEE Spring 2009, CIEE Primavera 2009

Description

Student affiliation : Department of Biochemistry, Occidental College Born Digital

Subject: topical

Araceae--Pollen; Araceae--Polen; Scarabaeidae; CIEE Spring 2009; CIEE Primavera 2009

Subject: geographic

Costa Rica--Puntarenas--Monteverde Zone; Costa Rica--Puntarenas--Zona de Monteverde

Genre

Reports

Holding Location

Monteverde Institute MVI

Identifier

M39-00520

The effects of Xanthosoma spp. (Araceae)  temperature, scent, and flowers on the mating frequency of Cyclocephala sexpunctata (Scarabaeidae)

Share

COinS
 
 

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.