@article{fdi:010064840,
  title = {{T}rophic opportunism of central {A}mazon floodplain fish},
  author = {{M}ortillaro, {J}. {M}. and {P}ouilly, {M}arc and {W}ach, {M}. and {F}reitas, {C}. {E}. {C}. and {A}bril, {G}. and {M}eziane, {T}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he food web of the central {A}mazon basin displays one of the largest discrepancies in food source utilisation versus availability for consumers. {W}hile {C}-4 macrophytes dominate the primary producing biomass in floodplains, the food web is dominated by the use of {C}-3 carbon sources. {A}mazon fish species have wide-ranging diets and show feeding flexibility in response to spatial and temporal patterns in food source availability. {F}ish are therefore expected to use a range of available resources. {F}atty acids and stable carbon and nitrogen isotopic compositions were studied to investigate their trophic behaviour and provide a better assessment of food source utilisation by nine fish species from two {A}mazon floodplains. {A}lthough nitrogen stable isotopes positioned detritivores at the base of the food chain, their large proportions of polyunsaturated fatty acids ({FA}s) suggest selection of a high-quality food source, such as microalgae. {O}mnivores and insectivores displayed a wide range of food source utilisation, indicating opportunist feeding behaviour. {P}iscivores displayed the most {N}-15-enriched signature (up to 10.6), concomitant with their predator position in the studied food web. {C}-3 carbon was the dominant source for most species, which is a finding consistent with current classical knowledge. {H}owever, consumption of {C}-4 macrophytes was detected for the herbivore {S}chizodon fasciatus, in line with the spatial availability of this food source in the floodplain system. {L}arge amounts of polyunsaturated and essential {FA}s in these {C}-4 macrophytes indicate their high nutritive value. {O}ur results suggest that this food source is rather neglected by fish due to low digestibility, with the exception of the herbivore that may possess modification of its digestive system that allows the use of {C}-4 plants.},
  keywords = {{A}mazon ; fatty acids ; fish ; floodplains ; stables isotopes ; {AMAZONE} {BASSIN}},
  booktitle = {},
  journal = {{F}reshwater {B}iology},
  volume = {60},
  numero = {8},
  pages = {1659--1670},
  ISSN = {0046-5070},
  year = {2015},
  DOI = {10.1111/fwb.12598},
  URL = {https://www.documentation.ird.fr/hor/fdi:010064840},
}