@article{fdi:010088153,
  title = {{T}he introduced {A}rapaima gigas in the {B}olivian {A}mazon : trophic position and isotopic niche overlap with native species},
  author = {{R}ejas, {D}. and {O}berdorff, {T}hierry and {D}eclerck, {S}. {A}. {J}. and {W}inder, {M}.},
  editor = {},
  language = {{ENG}},
  abstract = {{N}on-native fish species may generate major ecological impacts on native assemblages. {T}his study aims to assess the potential impact of the introduced {A}rapaima gigas on native fish assemblages in two oxbow lakes of the {B}olivian {A}mazon. {S}table isotope data were used to determine trophic position ({TP}) and isotopic niche overlap, to evaluate potential predation and competition interactions, respectively. {R}esults suggest that {A}. gigas is more an omnivore than a top predator, as often claimed. {A}rapaima gigas occupied an intermediate {TP} between detritivore/herbivore and piscivore fish species and showed broader isotopic niche compared to most native species analysed. {T}he isotopic niche of {A}. gigas significantly overlapped with most native fish species in one lake (i.e. {L}ake {M}entiroso), while there was low niche overlap in the second (i.e. {L}ake {M}iraflores). {G}iven its omnivorous tendencies, the predation impact of {A}. gigas on other fish species is likely less than currently claimed and likely varies with the food web structure of the ecosystem. {M}ore precise data on resource availability and use are necessary to infer whether niche overlap will have negative impacts on native fish species through potential competitive interactions. {I}ncreasing our understanding on the processes generating impact of these introductions on resident communities through food web ecology will pave the way for better resource management and conservation efforts.},
  keywords = {competition ; fish ; floodplain lakes ; non-native species ; predation ; upper {M}adeira basin ; {BOLIVIE} ; {AMAZONIE}},
  booktitle = {},
  journal = {{E}cology of {F}reshwater {F}ish},
  volume = {[{E}arly access]},
  numero = {},
  pages = {[12 p.]},
  ISSN = {0906-6691},
  year = {2023},
  DOI = {10.1111/eff.12734},
  URL = {https://www.documentation.ird.fr/hor/fdi:010088153},
}