@article{fdi:010085337, title = {{T}rophic ecology of {A}mazonian {R}iver dolphins from three rivers in {B}razil and {B}olivia}, author = {{E}cheverria, {A}. and {B}otta, {S}. and {M}armontel, {M}. and {M}elo-{S}antos, {G}. and {F}ruet, {P}. and {O}liveira-da-{C}osta, {M}. and {P}ouilly, {M}arc and {D}i {T}ullio, {J}. and {V}an {D}amme, {P}. {A}.}, editor = {}, language = {{ENG}}, abstract = {{R}iver dolphins from the genus {I}nia are widely distributed in the {A}mazon, {O}rinoco and {T}ocantins {R}iver basins. {C}urrent knowledge on the dietary habits of these species is poor and based on stomach contents from stranded animals. {W}e used carbon and nitrogen stable isotopes to evaluate the diet preferences and trophic niche of the boto ({I}nia geoffrensis geoffrensis) and the bufeo ({I}. g. boliviensis) in three rivers from the {A}mazon and {T}ocantins basins. {S}amples were obtained from skin biopsies taken from social animals near fish markets during a tagging program or from dart biopsies of wild individuals. {P}rey isotopic data were obtained from fish collected during the surveys, catches by local fishermen or published data. {C}ontribution of prey to consumer diet was calculated through isotope mixing models and trophic niches were represented by the isotopic niche area. {P}iscivore prey was the main item in the diet of bufeos and botos from {T}apajos and {T}ocantins {R}iver wild group, whereas botos from {T}ocantins market group showed differences in diet and a lower trophic position probably mediated by human feeding near markets. {I}sotopic niche area was greater for {T}apajos botos than for {T}ocantins market group botos and bufeos, which can be an effect of the homogenization of the human-mediated diet and low samples sizes, in the case of the market group and bufeos, respectively. {R}esults presented here, represent a first attempt toward a better understanding of the trophic ecology of this endemic and threatened species through stable isotope analysis.}, keywords = {{I}nia geoffrensis ; {S}kin biopsies ; {S}table isotopes ; {I}sotopic niche ; {B}oto ; {B}ufeo ; {BRESIL} ; {BOLIVIE} ; {AMAZONIE} ; {AMAZONE} {BASSIN} ; {TOCANTINS} {BASSIN} ; {SAN} {MARTIN} {COURS} {D}'{EAU} ; {TAPAJOS} {COURS} {D}'{EAU}}, booktitle = {}, journal = {{M}ammalian {B}iology}, volume = {[{E}arly access]}, numero = {}, pages = {[10 p.]}, ISSN = {1616-5047}, year = {2022}, DOI = {10.1007/s42991-022-00267-x}, URL = {https://www.documentation.ird.fr/hor/fdi:010085337}, }