Biometría, clases etarias y proporción de sexos en Pingüinos de Magallanes (<i>Spheniscus magellanicus</i>) varados en la costa noroeste de la provincia de Río Negro (Argentina)
Biometría, clases etarias y proporción de sexos en Pingüinos de Magallanes (Spheniscus magellanicus) varados en la costa noroeste de la provincia de Río Negro (Argentina)
Centro de Investigación Aplicada y Transferencia Tecnológica en Recursos Marinos Almirante Storni (CIMAS) – CONICET. Güemes 1030, R8520CXV, San Antonio Oeste, Argentina
Patricio J. Pereyra
Centro de Investigación Aplicada y Transferencia Tecnológica en Recursos Marinos Almirante Storni (CIMAS) – CONICET. Güemes 1030, R8520CXV, San Antonio Oeste, Argentina
Juan Pablo Seco Pon
Instituto de Investigaciones Marinas y Costeras (IIMyC), Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata – CONICET. Av. Juan B Justo 2550, B7608FBY, Mar del Plata, Argentina
Área Natural Protegida Bahía de San Antonio Argentina aves marinas Golfo San Matías pingüinos varamientos
Cómo citar
Pizá, Victoria M., Patricio J. Pereyra, and Juan Pablo Seco Pon. 2025. “Biometría, Clases Etarias Y proporción De Sexos En Pingüinos De Magallanes (Spheniscus Magellanicus) Varados En La Costa Noroeste De La Provincia De Río Negro (Argentina)”. El Hornero 40 (1): 61-72. https://doi.org/10.56178/eh.v40i1.1510.
El Pingüino de Magallanes (Spheniscus magellanicus) es un ave marina de hábitos buceadores que nidifica en islas y costas de Chile y Argentina incluyendo las Islas Malvinas. El hallazgo de aves marinas varadas en las costas es un fenómeno que ocurre de manera regular. A lo largo del año, individuos de la especie son avistados con frecuencia en la costa noroeste de la provincia de Río Negro. El objetivo general de este estudio es reportar la biometría, proporción sexos y clases etarias de ejemplares de Pingüinos de Magallanes varados muertos en las costas del Área Natural Protegida Bahía de San Antonio. Durante el período junio 2020-junio 2022 se realizaron muestreos sistemáticos de aves varadas en dos sitios y se complementaron con avisos oportunistas. Se contabilizó un total de 288 Pingüinos de Magallanes varados muertos y se analizaron 51 individuos seleccionados al azar. La mayoría de los ejemplares perteneció a la clase etaria juvenil, en menor medida fueron hallados individuos adultos. La proporción de sexos fue significativamente asimétrica, equivalente a una relación de 3.75 hembras varadas por cada macho. Los individuos juveniles presentaron diferencias significativas en su biometría entre sexos, al menos en el largo de ala y el largo del dedo medio. Nuestros resultados se encuentran en línea con reportes previos para la especie en las costas de la provincia de Buenos Aires en Argentina y del centro-sur de Brasil. Este estudio permite una primera caracterización de la ocurrencia de varamientos de Pingüinos de Magallanes para el área de estudio.
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