@article{PAR00022907,
  title = {{N}atal origin and migration pathways of {M}ekong catfish ({P}angasius krempfi) using strontium isotopes and trace element concentrations in environmental water and otoliths},
  author = {{T}ran, {N}. {T}. and {L}abonne, {M}aylis and {C}hung, {M}. {T}. and {W}ang, {C}. {H}. and {H}uang, {K}. {F}. and {D}urand, {J}ean-{D}ominique and {G}rudpan, {C}. and {C}han, {B}. and {H}oang, {H}. {D}. and {P}anfili, {J}acques},
  editor = {},
  language = {{ENG}},
  abstract = {{T}o improve our knowledge of the migration pathway of a highly threatened fish species along the {M}ekong {R}iver, strontium isotope ratios ({S}r-87/{S}r-86) and 18 trace element concentrations were measured in the water and in the otoliths of an anadromous catfish, {P}angasius krempfi, to infer its natal origin and potential migration pathways. {W}ater was sampled at 18 locations along the mainstream, tributaries and distributaries of the {M}ekong {R}iver. {T}o check for accuracy and precision, measurements of the {S}r-87/{S}r-86 ratios and trace element concentrations were then compared in two laboratories that use different analytical methods. {D}ifferences in trace element concentrations between locations were not significant and could not, therefore, be used to discriminate between migration pathways. {H}owever, the {M}ekong mainstream, tributaries and distributaries could all be discriminated using {S}r isotopes. {T}he {S}r-87/{S}r-86 profiles recorded in {P}. krempfi otoliths showed that there were three contingents with obligate freshwater hatching and variable spawning sites along the {M}ekong mainstream, from {P}hnom {P}enh ({C}ambodia) to {N}ong {K}hai ({T}hailand) or further. {A}fter hatching, the fish migrated more or less rapidly to the {M}ekong {D}elta and then settled for most of their lifetime in brackish water. {S}pawning habitats and migration routes may be threatened by habitat shifts and the increasing number of hydropower dams along the river, especially the contingents born above {K}hone {F}alls ({L}aos). {T}he conservation of {P}. krempfi, as well as other migratory fish in the {M}ekong {R}iver, requires agreements, common actions and management by all countries along the {M}ekong {R}iver. {T}his study highlighted the importance of using both {S}r/{C}a and {S}r-87/{S}r-86 ratios to understand life history of anadromous fishes as the {S}r-87/{S}r-86 ratio in the water was shown to be less effective than the {S}r/{C}a ratio in identifying movements between different saline areas.},
  keywords = {{CAMBODGE} ; {THAILANDE} ; {LAOS} ; {VIET} {NAM} ; {MEKONG} {COURS} {D}'{EAU}},
  booktitle = {},
  journal = {{PL}o{S} {O}ne},
  volume = {16},
  numero = {6},
  pages = {e0252769 [25 ]},
  ISSN = {1932-6203},
  year = {2021},
  DOI = {10.1371/journal.pone.0252769},
  URL = {https://www.documentation.ird.fr/hor/{PAR}00022907},
}