Dietary resource overlap among three species of frugivorous bat in Costa Rica

 

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Detalles Bibliográficos
Autores: Maynard, Lauren, Ananda, Ariana, Sides, Maria Fernanda, Burk, Hannah, Whitehead, Susan
Formato: artículo
Fecha de Publicación:2019
Descripción:The maintenance of biodiversity in tropical forests is thought to be dependent on fine-scale mechanisms of niche partitioning that allow species to coexist. This study examined whether three species of short-tailed fruit bat that co-occur at a lowland tropical forest site in Costa Rica (Carollia castanea, C. perspicillata, C. sowelli) avoid inter- and intraspecific competition through dietary specialization on species in the genus Piper. First, dietary composition was examined using faecal samples (N = 210), which yielded three main findings: (1) bat species and sexes vary in overall reliance on fruits of Piper, with a higher percentage of seeds of Piper detected in the diets of C. castanea (98.2%) and females (91.5%); (2) adults and juveniles partition species of Piper by habitat, with a lower percentage of mid- to late-successional species of Piper detected in adults (20.8%); and (3) overall, there is a strong dietary overlap among and within the three species of Carollia. Second, controlled choice experiments were conducted with individual bats (N = 123) to examine preferences for different species of Piper. These results indicated few differences in Piper preference based on bat species, sex, age class or reproductive status, suggesting preference is not the primary mechanism shaping the observed differences in dietary composition. Overall, the dietary composition and preference similarities suggest there is strong competition both among and within the three species of Carollia for food resources.
País:Repositorio UNA
Institución:Universidad Nacional de Costa Rica
Repositorio:Repositorio UNA
Lenguaje:Inglés
OAI Identifier:oai:null:11056/22025
Acceso en línea:http://hdl.handle.net/11056/22025
Palabra clave:LA SELVA BIOLOGICAL STATION
NEOTROPICAL BATS
NICHE PARTITIONING
PIPER
PREFERENCE
BOSQUES TROPICALES
MURCIÉLAGOS
CAROLLIA CASTANEA
CAROLLIA PERSPICILLATA
CAROLLIA SOWELLI