@article{fdi:010077430,
  title = {{U}nmasking continental natal homing in goliath catfish from the upper {A}mazon},
  author = {{H}auser, {M}. and {D}uponchelle, {F}abrice and {H}ermann, {T}. {W}. and {L}imburg, {K}. {E}. and {C}astello, {L}. and {S}tewart, {D}. {J}. and {T}orrente-{V}ilara, {G}. and {G}arcia-{V}asquez, {A}. and {G}arcia-{D}avila, {C}. and {P}ouilly, {M}arc and {P}echeyran, {C}. and {P}onzevera, {E}. and {R}enno, {J}ean-{F}ran{\c{c}}ois and {M}oret, {A}. {S}. and {D}oria, {C}. {R}. {C}.},
  editor = {},
  language = {{ENG}},
  abstract = {{A}mazonian goliath catfishes are widespread in the {A}mazon {B}asin. {R}ecently, otolith {S}r-87:{S}r-86 analyses using laser ablation-multi-collector-inductively coupled plasma mass spectrometry ({LA}-{MC}-{ICPMS}) revealed a >8,000 km trans-{A}mazonian natal homing in {B}rachyplatystoma rousseauxii among fish caught and hatched in the largest {A}mazon {R}iver tributary, the upper {M}adeira basin. {A}lthough also suspected for fish in the upper {A}mazon, homing could not be demonstrated owing to less distinct environmental {S}r-87:{S}r-86 gradients along the {A}mazon mainstem. {U}sing scanning {X}-ray fluorescence microscopy ({SXFM}), a separate study provided evidence that {S}e:{C}a and {S}r:{C}a are useful markers for identifying migration into {A}ndean headwaters and the estuarine environment. {W}e analysed otoliths of known {S}r-87:{S}r-86 profiles using {SXFM} mapping to test if {S}r:{C}a and {S}e:{C}a patterns could demonstrate natal homing for three fish caught in the upper {A}mazon, using as reference two individuals that were natal homers and two forced residents (hatched after the construction of hydroelectric dams on the {M}adeira {R}iver) from the upper {M}adeira {R}iver. {A}s hypothesised, although the {S}r isotope profiles of the upper {A}mazon individuals were uninformative, two of them presented similar alternating mirror patterns of {S}r:{C}a and {S}e:{C}a to those of the upper {M}adeira natal homers, indicating migrations out of the {A}ndean region and into the estuary area. {B}oth were therefore natal homers from the upper {A}mazon. {T}he third individual from the upper {A}mazon presented similar {S}r:{C}a and {S}e:{C}a patterns to those of the upper {M}adeira residents, suggesting it was a natural resident from the upper {A}mazon. {B}y combining the results of {S}r-87:{S}r-86 analyses ({LA}-{MC}-{ICPMS}) and {S}r:{C}a and {S}e:{C}a mappings ({SXFM}) that are completely independent of one another, we demonstrated that {B}. rousseauxii also performs natal homing in the upper {A}mazon. {O}ur results indicate that the life cycle of {B}. rousseauxii is more complex than previous literature hypothesised, with the existence of partial migration, even in absence of physical barriers. {Q}uantifying the relative importance of these different life-history strategies will have important implications for fisheries management. {O}ur results also lay the groundwork for conservation efforts in the context of hydropower development in the {A}mazon {B}asin and set testable hypotheses of the potential impacts of the {M}adeira {R}iver dams.},
  keywords = {{B}rachyplatystoma rousseauxii ; dam impacts ; microchemistry ; otolith ; {AMAZONE} {BASSIN} ; {MADEIRA} {BASSIN}},
  booktitle = {},
  journal = {{F}reshwater {B}iology},
  volume = {[{E}arly access]},
  numero = {},
  pages = {[12 p.]},
  ISSN = {0046-5070},
  year = {2019},
  DOI = {10.1111/fwb.13427},
  URL = {https://www.documentation.ird.fr/hor/fdi:010077430},
}