%0 Journal Article
%9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES
%A Avigliano, E.
%A Chung, M. T.
%A Pouilly, Marc
%A Huang, K. F.
%A Casalinuovo, M.
%A Dominino, J.
%A Silva, N.
%A Sanchez, S.
%A Facetti, J. F.
%A Volpedo, A. V.
%T Strontium isotope mapping and its application to study the fish life history (Salminus brasiliensis) in semi-fragmented rivers (La Plata Basin, South America)
%D 2023
%L fdi:010088118
%G ENG
%J Fisheries Research
%@ 0165-7836
%K Habitat use ; Hydrogeology ; Otolith microchemistry ; Migration ; Freshwater fish ; Natural tag
%K AMERIQUE DU SUD ; LA PLATA BASSIN
%M ISI:001002064500001
%P 106741 [10 ]
%R 10.1016/j.fishres.2023.106741
%U https://www.documentation.ird.fr/hor/fdi:010088118
%> https://www.documentation.ird.fr/intranet/publi/2023-08/010088118.pdf
%V 265
%W Horizon (IRD)
%X Salminus brasiliensis is one of the largest and most important commercial and sporting fish species in South America, of which little is known about its habitat use, especially in semi-fragmented rivers. The aims of this study were to expand the water 87Sr/86Sr baseline of the La Plata Basin, and to study the migratory patterns of S. brasiliensis from Paran ' a dam-free stretch and a representative tributary semi-fragmented using otolith isotopic chemistry. Water samples were collected at 10 sites on the upper Paran ' a River and two sites on the middle and lower Carcaraña Basin (tributary of the lower Paran ' a River). Fourteen fish were caught in the upper Paran ' a River and 13 in two sites of the middle and lower Carcaran similar to ' a Basin. 87Sr/86Sr was measured in water and otolith core-to-edge transect by MC-ICPMS and LA-MC-ICPMS, respectively. Water results were incorporated into a dataset with 53 other sampling points from the La Plata Basin and subjected to a cluster analysis, which resulted in nine differentiable chemical signatures. Discriminant analysis confirmed the presence of at least eight contrasting isotopic signals. Based on the otolith core 87Sr/86Sr, four individuals from the upper Paran ' a River were classified as originating from Paraguay sub-basin, while the rest were assigned to Paran ' a River. All fish from the Carcaran similar to a ' sub-basin were classified as originating from the Paran ' a River, except two individuals which were assigned to the Carcaran similar to ' a sub-basin. Results indicated that the fish run up the Carcaran similar to ' a sub-basin overcoming up to three open spillways, and could live there for years and even reproduce. However, the Paran ' a River had the largest contribution to the fish caught in both the upper Paran ' a River and the Carcaran similar to ' a sub-basin.
%$ 040 ; 034