Biodiversity inventories are sometimes biased by the various collection methods applied. In the case of the bats, the acoustic monitoring technique has proven to be complementary to conventional sampling. From July 2007 to June 2008, we studied the composition of a bat community in the southern region of the Isthmus of Tehuantepec, Oaxaca, Mexico. We registered 32 species of bats...
Introduction: The state of Jalisco with only 4.0 % of the national area holds about 27.0 % (64 spp) of all rodent species described for Mexico. This knowledge of the richness of rodents from Jalisco is clearly known and refers only to the publications cited the presence of a taxon inside the state border. Therefore, this paper aims to propose an illustrated key to facilitate any...
Introduction: The demands of space for housing, industrial, commercial, and recreation space, are increasing as the human population continues to focus on urban areas. This implies an increase and constant degradation of natural environments. Despite the negative effect that the urban areas have on the biodiversity, these can be considered as important areas for the conservation...
Introduction: Studying a species habitat is a tool for researchers and stake holders to find key ecological characteristics to be used in management actions. Freshwater systems comprises most of the habitat of Antillean manatees, however the habitat features of these systems are still poorly understood. The objective of this study was to explore habitat variables related most to...
Introduction: In Venezuela, the genus Cryptotis is represented by four species: C. meridensis, C. tamensis, C. aroensis and C. venezuelensis. C. meridensis, and C. tamensis have been documented in the Andes (Cordillera de Mérida, El Tamá, and Sierra de Perijá). On the other hand, C. aroensis, and C. venezuelensis are recorded only in the Cordillera de la Costa (Sierra de Aroa...
Introduction: The department of Caldas is located in the Central Andes of Colombia, it includes a mosaic of environments that originally was conformed by páramos, sub-Andean and Andean forests, and rainforests. Although several studies have contributed to the knowledge of wild felids that inhabit the department of Caldas, Central Andes of Colombia, to date, there are no a...
Introduction: The Greater Grison Galictis vittata is distributed in the northern part of Latin America, from southern Mexico through Central America to reach northern Bolivia and Brazil, from sea level to 1.500 m, being more common below 500 m. In the department of Caldas, located in the Central Cordillera of Colombia, there is no literature to collect information of G. vittata...
Introduction: The Cerrado is characterized by a mosaic of habitats ranging from open grasslands to dense arboreal savannas and woodlands, with gallery forests along watercourses. Extensive areas of Cerrado have been gradually deforested in the last 50 years, currently only 20% of the biome still retains its original vegetation, and only 2.5% is preserved as permanent protected...
Introduction: We analyzed the variation in the age structure, sex ratio, proportion of reproductive individuals, age and size at sexual maturity, and litter size in a population of the sigmodont rodent Wiedomys pyrrhorhinos. We compared the observed distributions with the monthly rainfall for the same period, to identify the reproductive period and to assess the effects of the...
Introduction: The Asociación Mexicana de Mastozoologia was established in 1984 at Mexico City, with four objectives: 1) to study and propose solutions to problems and policies of management and conservation of mammals in Mexico; 2) to gather people interested in mammals in Mexico; 3) to promote and organize the interaction between people and groups interested in mammalogy, and 4...
Introduction: We estimated the age of 41 long-beaked common dolphins, Delphinus capensis, found stranded in Sonora and Baja California beaches in the Gulf of California from 1981 to 2000. The aim of our work was to know the age and if possible the size of stranded dolphins and the possible causes of their stranding. Methods: Dentinal growth layers in teeth were revealed using an...
Introduction: Animals' requirements and their complex interactions with their environment result in different activity patterns that reflect adaptations to daily, seasonal and annual variations in their surroundings. These adaptations may differ among individuals as a function of age, sex, physiological state, time of day, season and weather. Behavior is important because deer...
Introduction. Alfred Dugès (1826-1910) began the formal study of wild mammals in the state of Guanajuato, Mexico. After his death the subject remained virtually forgotten for almost a hundred years. In the early years of the XXI century several authors began a period of revision of this state fauna based on recent field surveys, museum specimens and previously unnoticed...
Introduction: An important number of mammals of the order Carnivora are opportunists that consume primarily small mammals, although they can amplify their diet with other larger vertebrates and arthropods. Fruits have also been reported in the diet of some carnivores; however, their role as agents of seed dispersal has not been well documented thus far. In this study we analyzed...
Introduction: The opossum Didelphis virginiana (Kerr 1792) is one of the eight species of marsupials that live in the northern region of America and is widely distributed in Mexico. There is a large literature in North America of studies on this species, including its ectoparasites. But in Mexico studies are scarce, and so we decided to investigate the opossum ectoparasite...
Introduction: From different ecological approaches, the coati (Nasua narica) is an important procyonid. Its distribution extends from southern of the United States to Colombia. IUCN (2013) considered it as Least Concern, but in Mexico is not considered under any category of protection due to its wide distribution. Despite this, there is poor knowledge about their population...
Introduction: Neonate bats represent 12-43% of postpartum-matemal body mass, but unlike other small mammals with large offsprings, bats are altricial and totally dependent on maternal care for survival. Neonates of several bat species are born naked, with low thermoregulatory ability; therefore their growth and development are affected by factors such as humidity and temperature...
Introduction: In Colombia, there is widespread transformation of natural ecosystems, especially in the Andean region. However, the impacts of those transformations have been poorly studied. Optimal patch theory was used to evaluate the foraging behavior and movement patterns in the white-eared opossum (Didelphis pernigra) in the Sabana de Bogotá, a plateau at about 2,600 m in the...
Introduction: Considering the general deterioration of Michoacán rivers, increased poaching, the failure to enforce relevant laws in the last 10 years, and the absence of a detailed assessment of the current status of the river otter (Lontra longicaudus) in the state of Michoacán, our main goal was to collect and analyze all available historical and recent evidence for the...