Uso del hábitat, coloración, y observaciones del comportamiento de los peces de las cabeceras montañosas del Noroeste de cuenca del Plata

Autores/as

DOI:

https://doi.org/10.30550/j.azl/2380

Palabras clave:

Coloración, partición del hábitat, cardúmenes interespecíficos, migración altitudinal, áreas de cría

Resumen

Describimos el uso del microhábitat y presentamos observaciones sobre la coloración y el comportamiento de peces de las nacientes montañosas del noroeste de la cuenca del Plata, una región dulceacuícola altamente endémica y de alta prioridad para la conservación. Mediante
observaciones subacuáticas, grabaciones de video y fotografía in situ documentamos asociaciones de hábitat, formación de cardúmenes, interacciones entre especies y el posible papel ecológico de los patrones de coloración. En cursos de agua de las cuencas de los ríos Bermejo y Juramento se acumularon aproximadamente 81,5 h de
observaciones directas y 17 h 36 min de registros en video subacuático. Las asociaciones de peces mostraron una marcada partición del hábitat: especialistas bentónicos (por ejemplo, Trichomycterus spegazzinii, Rineloricaria spp., Characidium spp. y Parodon carrikeri) se concentraron
en rápidos y microhábitats de alta velocidad de corriente, mientras que muchos caraciformes fueron más frecuentes en pozones y sectores de corriente moderada. Los brazos secundarios someros y vegetados funcionaron frecuentemente como áreas de cría al concentrar juveniles.

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Habitat use, coloration, and behavioral observations of fishes from mountainous headwaters of the northwestern La Plata basin

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2026-06-23

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Alonso, F., Irigoyen, A. J., Aguilera, G., Terán, G. E., Serra Alanis, W. S., Mettola, V. E., Waldbilling, M. M., Merlo, P. J., Trobbiani, G., Méndez López, A., Avigliano, E., Montes, M. M. ., Pandolfi, M., & Mirande, J. M. (2026). Uso del hábitat, coloración, y observaciones del comportamiento de los peces de las cabeceras montañosas del Noroeste de cuenca del Plata. Acta Zoológica Lilloana, 413–450. https://doi.org/10.30550/j.azl/2380
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