Tropical Ecology and Conservation [Monteverde Institute]

Alternative Title

La eficacia del tordo de montaña (Turdus plebejus) como un dispersor de semillas en la zona de Monteverde

Creator

Sean Brady

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Publication Date

August 2004

Abstract

Quantitative and qualitative factors are important in determining the effectiveness with which bird species disperse seeds. This study examined several factors that may influence the quantitative component of dispersal in the mountain robin. Regurgitation times of three common fruits in the area were examined. Additionally, the size at which seeds transition from being regurgitated to defecated was studied. Results show that regurgitation times between these three fruits do not differ significantly. However, there was a significant difference in the size of regurgitated (X = 5.97 mm ± 2.17 mm) and defecated seeds (X = 4.25 mm ± 2.55 mm) (t = -17.192, P < 0. 0001). This information may be important in determining the way in which seeds of different sizes are dispersed. Furthermore, if combined with future field studies documenting number of visits made to a fruiting tree and length of each visit, insight will be gained regarding the effectiveness of the mountain robin as a seed disperser. Los factores cuantitativos y cualitativos son importantes para determinar la eficacia con la cual las especies de aves dispersan las semillas. Este estudio examinó varios factores que pueden influenciar el componente cuantitativo de dispersión del tordo de montañas. Se examinó los tiempos para regurgitar tres frutos comunes en el área. Adicionalmente, se estudió el tamaño en el cual las semillas se pasan de ser regurgitada a ser defecadas. Resultados muestran que los tiempos de regurgitación entre estas tres fructosa no difieran significativamente. No obstante, hubo una diferencia significativa (t = -17.192, P < 0. 0001) en el tamaño de las semillas regurgitadas (X = 5.97 mm ± 2.17 mm) y defecadas. Esta información puede ser importante para determinar la forma en que las semillas de diferentes tamaños son dispersadas. Además, si se combina con futuros estudios de campo que documenten el número de visitas hechas a un árbol con frutos y la duración de cada visita, se ganara información con respeto a la eficacia del tordo de montaña como un dispersor de semillas.

Keywords

Birds--Behavior, Aves--Comportamiento, Seeds--Dispersal, Semillas--Dispersion, Monteverde Biological Station (Costa Rica), Estacion Biologica de Monteverde (Costa Rica), CIEE Summer 2004, CIEE Verano 2004

Description

Student affiliation : Lundquist College of Business, University of Oregon Born Digital

Subject: topical

Birds--Behavior; Aves--Comportamiento; Seeds--Dispersal; Semillas--Dispersion; CIEE Summer 2004; CIEE Verano 2004

Subject: geographic

Monteverde Biological Station (Costa Rica); Estacion Biologica de Monteverde (Costa Rica)

Genre

Reports

Holding Location

Monteverde Institute MVI

Identifier

M39-00185

The effectiveness of the mountain robin (Turdus plebejus) as a seed disperser in the Monteverde area

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