Habitat use of the amphidromous catfish Genidens barbus: first insights at its southern distribution limit
Registro en:
Esteban Avigliano , Jorge Pisonero , Ana Méndez , Andrea Tombari & Alejandra V. Volpedo (2021). Habitat use of the amphidromous catfish Genidens barbus: first insights at its southern distribution limit. New Zealand Journal of Marine and Freshwater Research; XX (XX); 1-8
0028-8330
1175-8805
Autor
Avigliano, Esteban
Pisonero, Jorge
Méndez, Ana
Tombari, Andrea Diana
Volpedo, Alejandra V.
Institución
Resumen
Fil: Avigliano, Esteban. Universidad de Buenos Aires, Facultad de Ciencias Veterinarias. Buenos Aires, Argentina. Fil: Avigliano, Esteban. CONICET-Universidad de Buenos Aires, Instituto de Investigaciones en Producción Animal (INPA). Buenos Aires, Argentina Fil: Pisonero, Jorge. University of Oviedo. Department of Physics. Oviedo, Spain Fil: Méndez, Ana. University of Oviedo. Department of Physics. Oviedo, Spain Fil: Tombari, Andrea Diana. Universidad Nacional de Río Negro. Laboratorio de Tecnología de Alimentos y Biotecnología. Río Negro, Argentina Fil: Volpedo, Alejandra. Universidad de Buenos Aires, Facultad de Ciencias Veterinarias. Buenos Aires, Argentina. Fil: Volpedo, Alejandra. CONICET-Universidad de Buenos Aires, Instituto de Investigaciones en Producción Animal (INPA). Buenos Aires, Argentina Fil: Volpedo, Alejandra. Universidad de Buenos Aires, Centro de Estudios Transdisciplinarios del Agua, Buenos Aires, Argentina White sea catfish Genidens barbus is an endangered amphidromous species distributed between northeastern Brazil and northern Argentine Patagonia, whose migratory behaviour at the southern end of its range is unknown. Here, the migratory patterns of this species were studied including marine and freshwater (Patagonian stock) environments via otolith core-toedge Sr/Ca and Ba/Ca profiles. Based on the Sr/Ca ratio, all specimens were classified as amphidromous with annual cycles of movement between waters of relatively low to high salinity occurring during spring. The core Sr/Ca ratio matched with the reference values for freshwater in all specimens. No evidence of resident freshwater or marine individuals was found. No evident
antagonistic relationship was found between both Sr/Ca and Ba/ Ca ratios. A Ba/Ca peak was observed followed by a drop coinciding with the core edge, highlighting the need to evaluate the potential transfer from the yolk, and to understand what factors are linked to the growth marks within the first year of life. true -