caa a22 4500 606227032 CHVBK 20210128101156.0 cr unu---uuuuu 210128e20150601xx s 000 0 eng 10.1007/s10641-015-0387-3 doi (NATIONALLICENCE)springer-10.1007/s10641-015-0387-3 Use of lapillus otolith microchemistry as an indicator of the habitat of Genidens barbus from different estuarine environments in the southwestern Atlantic Ocean [Elektronische Daten] [Esteban Avigliano, Gonzalo Velasco, Alejandra Volpedo] The marine catfish Genidens barbus is an anadromous species from South America. The aim of the present study was to evaluate the use of lapillus otolith microchemistry (Sr:Ca; Ba:Ca and Mg:Ca ratios) as an indicator of changes in habitat use and identify the potential breeding areas and fish stocks of G. barbus populations from the Plata Basin (Paraná River Delta and De la Plata River estuary-Argentina) and Lagoa dos Patos coastal lagoon (southern Brazil). Sr:Ca, Ba:Ca and Mg:Ca ratios were measured in the core area (inner 4 rings) and external area (outer 3-4 rings) of the otoliths by ICP-OES. The Sr:Ca ratio tended to be higher in the otolith external area than in the core area, while the Ba:Ca ratio followed the opposite pattern. This suggests the displacement of fish toward higher salinity areas. The Sr:Ca, Ba:Ca, Mg:Ca ratios in the core and external areas of the otoliths from the Plata Basin differed significantly from those of the otoliths from Lagoa dos Patos. This may indicate the occurrence of two different breeding sites and at least two fish stocks in the study region. Springer Science+Business Media Dordrecht, 2015 Anadromous nationallicence Genidens barbus nationallicence Lapillus otolith nationallicence Microchemistry nationallicence Fish stock nationallicence Breeding areas nationallicence Avigliano Esteban Instituto de Investigaciones en Producción Animal (INPA-CONICET-UBA), Facultad de Ciencias Veterinarias, Universidad de Buenos Aires, Av. Chorroarín 280, C1427CWO, Buenos Aires, Argentina aut Velasco Gonzalo Instituto de Oceanografia, Fundação Universidade Federal do Rio Grande (FURG), Rio Grande, RS, Brazil aut Volpedo Alejandra Instituto de Investigaciones en Producción Animal (INPA-CONICET-UBA), Facultad de Ciencias Veterinarias, Universidad de Buenos Aires, Av. Chorroarín 280, C1427CWO, Buenos Aires, Argentina aut Environmental Biology of Fishes Springer Netherlands 98/6(2015-06-01), 1623-1632 0378-1909 98:6<1623 2015 98 10641 https://doi.org/10.1007/s10641-015-0387-3 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10641-015-0387-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Avigliano Esteban Instituto de Investigaciones en Producción Animal (INPA-CONICET-UBA), Facultad de Ciencias Veterinarias, Universidad de Buenos Aires, Av. Chorroarín 280, C1427CWO, Buenos Aires, Argentina aut NATIONALLICENCE 700 1- Velasco Gonzalo Instituto de Oceanografia, Fundação Universidade Federal do Rio Grande (FURG), Rio Grande, RS, Brazil aut NATIONALLICENCE 700 1- Volpedo Alejandra Instituto de Investigaciones en Producción Animal (INPA-CONICET-UBA), Facultad de Ciencias Veterinarias, Universidad de Buenos Aires, Av. Chorroarín 280, C1427CWO, Buenos Aires, Argentina aut NATIONALLICENCE 773 0- Environmental Biology of Fishes Springer Netherlands 98/6(2015-06-01), 1623-1632 0378-1909 98:6<1623 2015 98 10641