Please use this identifier to cite or link to this item:
Title: Carbon sources of fish in an Amazonian floodplain lake
Authors: Oliveira, Ana Cristina B
Soares, Maria Gercilia Mota
Martinelli, Luiz Antônio
Moreira, Marcelo Z.
Keywords: Aquatic Organism
Carbon Budget
Feeding Behavior
Hydrological Cycle
Isotopic Analysis
Lake Ecosystem
Nitrogen Compound
Seasonal Variation
Stable Isotope
Stomach Content
Tropical Environment
Amazon River
South America
Cichla Monoculus
Colossoma Macropomum
Mylossoma Duriventre
Prochilodus Nigricans
Schizodon Fasciatus
Triportheus Angulatus
Issue Date: 2006
metadata.dc.publisher.journal: Aquatic Sciences
metadata.dc.relation.ispartof: Volume 68, Número 2, Pags. 229-238
Abstract: In a tropical floodplain lake in central Amazon (L. Camaleão), we investigated seasonal shifts in primary carbon sources for commercially important fish species over an hydrological cycle. Carbon and nitrogen stable isotope and stomach content analyses were conducted to investigate the feeding preferences of six species with different feeding habits: Cichla monoculus (piscivorous species), Schizodon fasciatus (herbivorous), Prochilodus nigricans (detritivorous), and the omnivorous species Triportheus angulatus, Colossoma macropomum and Mylossoma duriventre. Stomach content and isotopic analyses exhibited a high seasonal variation for four out of the six species. The dominant food items were fruits and seeds, plant material, zooplankton and aquatic and terrestrial insects. Over the hydrological cycle, C3 plants were the major carbon source for all fish species. In addition, seston and aquatic C4 macrophytes were very important carbon sources for most species. Our findings underpin the complex trophic linkages between floodplain lakes and the aquatic terrestrial transition zone as postulated by the Flood Pulse Concept. © Eawag, 2006.
metadata.dc.identifier.doi: 10.1007/s00027-006-0808-7
Appears in Collections:Artigos

Files in This Item:
There are no files associated with this item.

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.