Medardo Arreortúa

• Master of Science
• PhD Student at National Polytechnic Institute

The Mexican mud turtle, Kinosternon integrum, is a native Mexican species with a wide distribution. However, despite its abundance, information on its demographics, natural history, and threats is scarce. We report 18 new records of K. integrum in the states of Oaxaca and Puebla. These data highlight threats such as contamination of remaining aquat...

The introduction of invasive fish for aquaculture can significantly impact native aquatic fauna, especially in regions where native amphibians have a biphasic life cycle. We conducted three laboratory experiments to assess the effects of introduced rainbow trout (Oncorhynchus mykiss) aquaculture on the native showy leopard frog (Lithobates spectabi...

In Mexico opossums are difficult to find, and much of their natural history, ecology, and behavior are unknown. Through photographic and visual records, we obtained data on the presence of two species of marsupials in southern Mexico. We report new municipal records of Derby’s woolly opossum, Caluromys derbianus in Veracruz, and new municipal recor...

We provide new records of Neogale frenata and Potos flavus, two carnivores with elusive behaviors that are challenging to observe in their natural habitats. Through direct records compiled in diurnal and nocturnal monitoring over three years, we record two individuals of N. frenata, a juvenile and an adult, and three individuals of P. flavus, an ad...

Here, we present the first record of Rheohyla miotympanum and Incilius occidentalis in the Municipality of San Miguel del Río, Oaxaca along with a brief description of their habitat. We provide morphological measurements and one call for R. miotympanum.

Claudius angustatus es una especie de tortuga de agua dulce en peligro de extinción. En este trabajo aportamos nuevos registros que amplían 25.1 km su distribución geográfica y aumentan en 209 m el rango altitudinal de la especie. Destacamos el hecho de que la mayoría de estos datos provienen de zonas altamente modificadas por acciones humanas, pri...

New records of Basiliscus vittatus in Oaxaca, Mexico

Distribution notes - Salvadora intermedia in Oaxaca, Mexico

Lepidophyma Duméril, 1851 is the most diverse genus among the nocturnal lizards, with 23 species distributed from the Atlantic and Pacific slopes of Mexico southeast into Panama. Currently, the available information on the ecology and distribution of these species is limited mainly due to their saxicolous habits. Here we present five new state reco...

Ecological observations of Chiropterotriton chiropterus (Caudata: Plethodontidae), an endangered salamander from Mexico

La conservación de la biodiversidad, es la práctica de elaborar estrategias de acción para mantener la integridad estructural y funcional de los ecosistemas que se distribuyen en una determinada región del planeta. Esta práctica se ha convertido en una necesidad global debido a la extinción de especies y a la crisis por el cambio climático que enfr...

Although amphibian consumption by humans has been reported globally, this practice is not well studied despite its direct implications to the decline of amphibian populations. The International Union for Conservation of Nature (IUCN) recognizes the need to document the use and trade of species to be considered in assessing their extinction risk. He...

Amphibian populations are declining rapidly around the world. However, new amphibian species keep being discovered, reflecting the still expanding state of our knowledge of this group. Similarly, there is a lack of information regarding life cycles, particularly among those species that have indirect development with a free-living larval stage. Man...

The montane cloud forests of the Sierra Madre de Oaxaca (SMO) host a remarkable herpetofauna diversity and represent one of the most important areas of endemism for Mexico and Mesoamerica. Although the area has been previously studied, most of the extant records for this group are biased to locations accessed by paved roads. In addition, an importa...