Ecología trófica de la lagartija Xenosaurus mendozai (Squamata: Xenosauridae) en el estado de Querétaro, México

Abstract

Se determinó la ecología trófica de la lagartija Xenosaurus mendozai en Querétaro, México, identificando la importancia relativa de las presas consumidas y evaluando las diferencias intersexuales en la composición de la dieta, a lo largo de un año. Para ello, se calculó su valor de importancia (I X), se evaluó el nivel de especialización mediante el índice de Levins, así como el solapamiento mediante el índice de Pianka. Los análisis del contenido del tracto digestivo indican que son insectívoras y su dieta se basa principalmente en 12 órdenes, de los cuales las larvas de lepidópteros, los coleópteros y los ortópteros representan más del 60% de su dieta; por lo que la tendencia de esta población es hacia la especialización (B A = 0.015), con un alto índice de solapamiento entre machos y hembras (O MH = 0.946). En términos generales, la conformación de la dieta de esta especie es similar a lo registrado en otras especies del género, lo que puede estar determinado por el uso del microhábitat. Sin embargo, se requiere de estudio de disponibilidad de presas para describir con mayor precisión las preferencias alimentarias, así como para realizar pruebas experimentales que permitan determinar si existe preferencia por algún tipo particular de presas. Derechos Reservados © 2015 Universidad Nacional Autónoma de México, Instituto de Biología. Este es un artículo de acceso abierto distribuido bajo los términos de la Licencia Creative Commons CC BY-NC-ND 4.0.

Comparative morphology and trophic ecology in a population of the polymorphic lizard Sceloporus minor (Squamata: Phrynosomatidae) from central Mexico

“…A high proportion of insects in the diet has been recorded in other studies of S. minor from both the same and different localities (García-Rosales et al, 2019), as well as in several closely related species [ S. torquatus Wiegmann, 1828 (Feria-Ortiz, Nieto-Montes de Oca & Salgado-Ugarte, 2001); S. jarrovii Cope, 1875 (Gadsden et al, 2011)]. Consumption of insects is common in the diet of lizards in general, as these prey provide an excellent source of nutrients for growth, development, and daily activities (Gadsden et al, 2011; Zamora-Abrego & Ortega-León, 2016). The observed frequency of consumption of plant material was also high, confirming previous reports of this behavior in S. minor (García-Rosales et al, 2019), close relatives such as S. mucronatus Cope, 1885 (Méndez-De la Cruz, Casas-Andreu & Villagrán-Santa Cruz, 1992), and S. torquatus (Feria-Ortiz, Nieto-Montes de Oca & Salgado-Ugarte, 2001), and species of the lacertid genus Podarcis (Pérez-Mellado & Corti, 1993), among others.…”

Effect of climate change in lizards of the genusXenosaurus(Xenosauridae) based on projected changes in climatic suitability and climatic niche conservatism

“…() were not included in this analysis because available information is scarce. Occurrence data of the Xenosaurus species were obtained from three sources: (a) field geographic records collected by the authors in a period of more than 10 years, since 2006, (b) published records (Ballinger, Lemos‐Espinal, Sanoja‐Sarabia, & Coady, ; Ballinger, Lemos‐Espinal, & Smith, ; García‐Rico et al., ; Lemos‐Espinal & Smith, ; Lemos‐Espinal, Smith, & Ballinger, ,b; Nieto‐Montes de Oca, ; Rojas‐González, Jones, Zúñiga‐Vega, & Lemos‐Espinal, ; Woolrich‐Piña, Lemos‐Espinal, Oliver‐López, & Smith, ; Zamora‐Abrego & Ortega‐León, ), and (c) unpublished data of ANMO. The number of occurrence records collected for each species was X .…”

“…Most species of the genus share behavioral and physiological characteristics, such as being thermoconformists and thigmotherms with preferences for relatively low temperatures (García‐Rico, Díaz de la Vega‐Pérez, Smith, Lemos‐Espinal, & Woolrich‐Piña, ). Some authors have suggested that the entire genus Xenosaurus might be very susceptible to rapid environmental changes (Nieto‐Montes de Oca, ; Sinervo et al., ), which could be supported by the fact that most of these species are microendemic and have restricted dispersal abilities (Zamora‐Abrego & Ortega‐León, ). No study, however, has properly evaluated how climate changes might influence this group of lizards; therefore, the following question becomes relevant: how would lizard species of Xenosaurus respond if the conditions of their climatic niche are modified because of climate change?…”

A new species of knob-scaled lizard (Xenosauridae, Xenosaurus) from the Sierra Madre Oriental of Puebla, Mexico

“…Lizards of the Middle American genus Xenosaurus Peters, 1861 occur from southwestern Tamaulipas and extreme southeastern Guerrero, on the Caribbean and Pacific versants of Mexico, respectively, south and east to Alta Verapaz, Guatemala (King and Thompson 1968; Smith and Iverson 1993; Ballinger et al 2000; Pérez-Ramos et al 2000; Nieto-Montes de Oca et al 2001; Canseco-Márquez 2005; Zamora-Abrego 2009; Nieto-Montes de Oca et al 2013, 2017). Species of Xenosaurus occur in a considerable elevational range (ca.…”