Feeding ecology and ecomorphology of cichlid assemblages in a large Mesoamerican river delta
Por: Pease, Allison A [autora].
Mendoza Carranza, Manuel [autor] | Winemiller, Kirk O [autor].
Tipo de material: Artículo en línea Tipo de contenido: Texto Tipo de medio: Computadora Tipo de portador: Recurso en líneaTema(s): Cíclidos | Peces | Nutrición | Nicho (Ecología) | Administración de la industria pesquera | EcomorfologíaTema(s) en inglés: Cichlids | Fishes | Animal nutrition | Niche (Ecology) | Fishery management | EcomorphologyDescriptor(es) geográficos: Reserva de la Biosfera Pantanos de Centla (Tabasco, México) Nota de acceso: Disponible para usuarios de ECOSUR con su clave de acceso En: Environmental Biology of Fishes. Volumen 101, número 6 (June 2018), páginas 867-879. --ISSN: 0378-1909Número de sistema: 40094Resumen:Tipo de ítem | Biblioteca actual | Colección | Signatura | Estado | Fecha de vencimiento | Código de barras |
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Artículos | Biblioteca Electrónica Recursos en línea (RE) | ECOSUR | Recurso digital | ECO400400949452 |
Disponible para usuarios de ECOSUR con su clave de acceso
Fish assemblages in tropical lowland rivers are characterized by a high richness of species that feed on a diverse array of food resources. Although closely related species often have similar feeding ecology, species within the family Cichlidae display a broad spectrum of trophic niches, and resource partitioning has been inferred from studies conducted in Neotropical rivers. We investigated interspecific variation in food resource use and its relationship to morphological variation among cichlid fishes within the Pantanos de Centla Biosphere Reserve, a coastal area encompassing the delta of the Grijalva-Usumacinta River in Tabasco, Mexico. Most species consumed benthic crustaceans, aquatic insect larvae, and detritus, but some were more herbivorous, and one species was a specialized piscivore. Dietary niche overlap among species was higher than expected for one assemblage, and similar to random expectations for another, suggesting a lesser role for resource partitioning than has been shown for some cichlid assemblages, perhaps due to availability of abundant resources, even in low-water conditions. Canonical correspondence analysis revealed that greatest morphological differences am7ong species involved functional traits directly associated with resource use. Relationships between feeding ecology and morphology were similar to those described for other riverine cichlids. Strong ecomorphological relationships facilitate inferences about the ecology of cichlid species, including species that currently lack data from field studies. Knowledge of ecological relationships will be important for conservation in the Pantanos de Centla, an ecosystem of global significance for biodiversity and ecosystem services. eng