Treesearch

La Reserva Jaguar del Norte (RJN) se creó en 2003 con la finalidad de proteger la población más norteña de jaguar (Panthera onca), y a otras especies igualmente importantes que habitan en el territorio de esa región. Con el propósito de generar información de la población de felinos silvestres: jaguar, puma (Puma concolor), ocelote (Leopardus pardalis), y gato montes (Lynx rufus) se realizaron monitoreos con 92 cámaras-trampa dentro de la RJN. Se obtuvo un esfuerzo de muestreo de 21,170 días-cámaras para los siete periodos en los que se dividió el estudio (enero-diciembre del 2014). Se...

There are 55 Sky Island mountain ranges or mountain complexes connected by oak woodland corridors in the Madrean Archipelgo between the Sierra Madre Occidental in Sonora and the Mogollon Rim in Arizona. Thirty-two of them ar in Sonora, Mexico. In 2009 Sky Island Alliance began the Madrean Archipelago Biodiversity Assessment (MABA) Program to document the biodiversity of Sonoran Sky Islands. MABA biotic inventory Expeditions explored nine Sky islands, and Mini-Expedtions to three other areas. All observations of animals and plants are publicly available in the MABA database. In 2015...

Se presentan datos de un inventario exploratorio de los picudos (Coleoptera: Curculionoidea) presentes en las inmediaciones de Mesa Tres Ríos, municipio de Nácori Chico, Sonora, México. La localidad se encuentra a 1,880 m sobre el nivel del mar. Se utilizó una red de golpeo para la captura de los organismos (Márquez-Luna 2005). Se realizaron 41 muestreos en área de estudio de 2,050 m2 aproximadamente, representando cuatro diferentes ecosistemas (pino, pinoencino, encino y vegetación riparia), y durante un periodo de recolecta del 26 de junio al 30 de septiembre de 2017. Se registraron...

There are a multitude of innovative strategies available to land managers that can help facilitate landscape-level conservation in the face of expected changes in human population growth, increasing temperature, shifting rainfall patterns, and weather extremes. A good example involves Leslie Canyon National Wildlife Refuge in Cochise County, Arizona. Here, the U.S. Fish and Wildlife Service (Service) has worked effectively with others to expand protection, conservation, and species recovery activities beyond the 2,765 ac (1,119 ha) Refuge owned by the Service, extending those efforts onto...

Light traps have been shown to be valuable in the conservation and monitoring of endemic desert fishes. To use this method sampling in Rio San Bernardino, Sonora, Mexico, a trap was developed that is of a robust, power-efficient design. This trap disassembles and nests into itself for safe storage and transport and can be easily assembled in the field without tools. Using two lithium coin cells as a power source, light from a light emitting diode is diffused by the translucent high-density polyethylene quatrefoil trap body. Initial field tests indicate this to be an effective design and a...

Cave definition is ambiguous, limited and depends on our personal perspective and knowledge about the subterranean systems and habitats. Speleological groups focus on several cavities such as caves, caverns, lava tubes and mines, which are all described as caves, despite their diverse origin, dimensions and environmental conditions. Classification systems have been proposed for all the subterranean habitats even though no single definition has been accepted. Nevertheless, there are basic categories that could guide us on fieldwork. The Pioneer Speleological Group of Sonora (G-PES, in...

Watersheds within the Madrean Archipelago have been severely degraded by a combination of both anthropogenic and natural processes, including unsustainable grazing and timber harvests, long-term droughts, and acute flooding events. We are investigating the effectiveness of various holistic watershed restoration techniques, used by land managers to combat the negative effects of these processes. Our study site, Smith Canyon, located in the Sonoita Creek Watershed and part of the Nogales Ranger District of the Coronado National Forest in Arizona, U.S.A., consists of numerous (~90) structurall...

The beaver (Castor canadensis) inhabits a riparian ecosystem surrounded by grasslands, desert thickets and mountain ranges in the so-called Sky Islands. In the period from December 2015 to November 2016, monitoring was carried out to determine relative abundance by photo trapping and density using the direct observation method. We identified five sites with presence of the species. The first data of relative abundance and density for the area was reported. This work represents a joint effort for beaver conservation among civil society organizations, academics and government agencies; this...

The distributions and diversity of Odonata (dragonflies and damselflies) in Arizona have been rapidly changing (Figure 1). Most of the species that were present in the state 60 years ago are still resident. But many other species of these aquatic flying insects are newcomers to Arizona, flying in to exploit available niches and in doing so establishing new populations. In writing this paper, we are calling attention to seven species of odonata that seem to have become Arizona residents, to one degree or another. We are attempting to document their changes in distribution during the years...

The Area de Protección de Flora y Fauna (APFF) Bavispe is one of the oldest protected areas in Mexico (decreed in 1936-39). It was created to protect eight sky island mountain ranges, of great biological diversity in high elevation areas, separated by lowland valleys with desert grasslands and foothills thornscrub in northeastern Sonora. Sierra Los Ajos is part of APFF Bavispe Division 4. El Chilicote is in the middle of the Sierra Los Ajos at 35.2 airline kilometers westnorthwest of Fronteras. Elevations range from 1,928 to 2,206 m. Three old mine pits in the area have a high probability...