EVALUACIÓN DE COMPORTAMIENTO REVELA AGREGACIONES SOCIALES EN Petrosaurus thalassinus
DOI:
https://doi.org/10.22201/fc.25942158e.2024.1.812Palabras clave:
Lagartijas, estructura del hábitat, etograma, grupos socialesResumen
En un breve estudio de la lagartija endémica Petrosaurus thalassinus, en el Cañón de la Zorra, en la Reserva de la Biosfera Sierra La Laguna en México, a lo largo de siete días buscamos obtener un panorama preliminar de su estructura social al evaluar su comportamiento, morfología y uso de hábitat. Capturamos, marcamos y medimos 28 adultos y realizamos 19.4 horas de observaciones focales en 47 adultos marcados y no marcados en campo. Los machos tuvieron una longitud hocico-cloaca mayor a la de hembras, pero las hembras presentaron una mayor masa que los machos. Las lagartijas realizaron 30 conductas diferentes que se organizaron en ocho categorías. Los resultados resaltan la agregación de individuos en grupos de dos a cinco lagartijas, las cuales permanecían muy cerca (separados por < 1m) y en contacto visual frecuente (25/47 observaciones, 53.2%) mientras termorregulaban en rocas, o compartían espacios en grietas. Si bien las lagartijas agregadas exhibieron altos niveles de tolerancia mutua y despliegue de señales, también mostraron poca o ninguna agresión. Los individuos más grandes usaron las rocas más altas y ocuparon posiciones más altas sobre estas, pero no hubo diferencia entre sexos. Además, observamos interacciones interespecíficas de P. thalassinus con Sceloporus hunsakeri y con Ctenosaura hemilopha. Nuestros resultados indican que P. thalassinus podría tener un sistema social más complejo que el reportado en la mayoría de las lagartijas, lo que justifica una mayor investigación.
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