Tropical Ecology and Conservation [Monteverde Institute]

Alternative Title

Concentración preferida de sacarosa en murciélagos nectarivoros

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Publication Date

November 2000

Abstract

Pollinators and plants are involved in a mutualism, where pollination takes place in exchange for some payment, usually in the form of nectar. One might assume that these nectar rewards would closely match a pollinator’s preference, but flowers may conserve energy by offering an unfavorable, but still suitable nectar reward. Bat pollinated flowers have been found to offer nectar of an 18% sucrose concentration, on average, over a range of 3%-51% (Baker 1998). Where in this range of sucrose concentrations do bat preferences lie? To find out, sucrose concentration preferences of a community of Neotropical bats were studied at the Hummingbird Gallery in Monteverde, Costa Rica. Four hummingbird feeders with solutions of 10%, 20%, 30% and 40% sucrose concentration were observed for 20 nights. Frequency of bat visitations to each feeder was recorded in ten-minute intervals. Bats visited the feeders of higher sucrose concentration (30% and 40%) more than feeders with lower sucrose concentration (10% and 20%). These findings support the idea that animal pollinated flowers may be providing a minimum reward to pollinators to ensure increased visitation frequency and cross-pollination. Los polinizadores y plantas se envuelven en un mutualismo, donde la polinización toma lugar el intercambio por un pago, habitualmente en la forma de néctar. Se puede asumir que esta recompensa de néctar es estrecha con la preferencia del polinizador, pero las flores pueden conservar energía al ofrecer un néctar no favorable pero seguir ofreciendo néctar como recompensa. Las flores que los murciélagos polinizan, tiene una concentración de néctar que es 18% de sucosa y tiene un rango de 3%-51%. ¿Cual es la concentración preferida por los murciélagos? Para responder esta pregunta, se estudio la preferencia en la concentración de sucosa en la Galería de Colibríes en Monteverde, Costa Rica. Cuatro comederos de colibríes con soluciones de 10%, 20%, 30% y 40% de sucosa fueron observados por veinte noches. La frecuencia de visitas de murciélagos en cada comedero fue recogida en intervalos de diez minutos. Los murciélagos visitaron los comederos con mayor concentración de sucosa (30% y 40%) mas que los comederos con menor concentración de sucosa (10% y 20%). Estos resultados apoyan la idea que las flores polinizadas por animales proporcionan una recompensa mínima a los polinizadores para asegurar que visiten las flores y la polinicen.

Keywords

Bats--Behavior, Murcielagos--Comportamiento, Mutualism (Biology), Mutualismo (Biologia), Monteverde Cloud Forest Reserve (Costa Rica), Reserva Biologica Bosque Nuboso Monteverde (Costa Rica), Costa Rica--Puntarenas--Monteverde Zone--Monteverde, Costa Rica--Puntarenas--Zona de Monteverde--Monteverde, CIEE Fall 2000, CIEE Otoño 2000

Description

Student affiliation : Department of Biology, Northeastern University, Boston, Massachusetts Born Digital

Subject: topical

Bats--Behavior; Murcielagos--Comportamiento; Mutualism (Biology); Mutualismo (Biologia); CIEE Fall 2000; CIEE Otoño 2000

Subject: geographic

Monteverde Cloud Forest Reserve (Costa Rica); Reserva Biologica Bosque Nuboso Monteverde (Costa Rica); Costa Rica--Puntarenas--Monteverde Zone--Monteverde; Costa Rica--Puntarenas--Zona de Monteverde--Monteverde

Genre

Reports

Holding Location

Monteverde Institute MVI

Identifier

M39-00032

Preferred sucrose concentration in nectarivorous bats

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