Otolith Sr/Ca ratio complements Sr isotopes to reveal fish migration in large basins with heterogeneous geochemical landscapes

The potential use of Sr/Ca and Ba/Ca ratios in fish otolith, as a complement to 87 Sr/ 86 Sr to study movements of Prochilodus lineatus, was evaluated in the La Plata Basin (South America). Water ratios were obtained from samples collected during the high and low water seasons at 42 sites across the...

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Bibliographic Details
Published in:Environmental biology of fishes 2021-03, Vol.104 (3), p.277-292
Main Authors: Avigliano, Esteban, Pisonero, Jorge, Bouchez, Julien, Pouilly, Marc, Domanico, Alejandro, Sánchez, Sebastian, Clavijo, Cristhian, Scarabotti, Pablo, Facetti, Juan F., Caffetti, Jacqueline D., del Rosso, Franco R., Llamazares Vegh, Sabina, Volpedo, Alejandra V.
Format: Article
Language:English
Subjects:
Animal Systematics/Taxonomy/Biogeography
Barium
Biodiversity and Ecology
Biomedical and Life Sciences
Calcium
Classification
Earth Sciences
Environment
Environment and Society
Environmental Sciences
Fish
Fish migration
Freshwater & Marine Ecology
Geochemistry
Isotopes
Life Sciences
Migrations
Nature Conservation
Physiochemistry
Ratios
Rivers
Sciences of the Universe
Strontium
Strontium 87
Strontium isotopes
Water
Zoology
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Summary:The potential use of Sr/Ca and Ba/Ca ratios in fish otolith, as a complement to 87 Sr/ 86 Sr to study movements of Prochilodus lineatus, was evaluated in the La Plata Basin (South America). Water ratios were obtained from samples collected during the high and low water seasons at 42 sites across the La Plata Basin. Elemental and isotopic ratios in water were measured by MC-ICP-MS, ICP-MS and ion chromatography, and obtained from available literature. Fish were caught from six different sites with different physiochemical features. Otolith core-to-edge Sr/Ca and Ba/Ca profiles were determined by LA-ICP-MS, while the otolith 87 Sr/ 86 Sr data set was taken from literature. The predictive classification by rivers according to water Sr/Ca, Ba/Ca and 87 Sr/ 86 Sr ratios (92.5%) was higher than that based solely on 87 Sr/ 86 Sr (58%), with classification that reached 100% for several rivers. Unlike Ba/Ca, a significant relationship (R 2  = 0.94, p  
ISSN:0378-1909
1573-5133
DOI:10.1007/s10641-021-01074-y