Mexico City, Mexico
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Ortega J.,Laboratorio Of Ictiologia Y Limnologia | Hernandez-Chavez B.,Laboratorio Of Macroecologia | Rizo-Aguilar A.,Autonomous University of the State of Morelos | Guerrero J.A.,Autonomous University of the State of Morelos
Revista Mexicana de Biodiversidad | Year: 2010

Little is known about the social structure of the molossid bats in the Neotropics. During 4 observational periods (2006/2007), we studied the spatial distribution and temporal variation of a colony of Nyctinomops laticaudatus inside the Governor's Palace at the Archeological Zone of Uxmal, Yucatán, Mexico. We surveyed 66 roosting cavities consisting of mixed groups of males and females. This particular association (mixed groups) occurred throughout the study, but bats shifted group membership by moving continuously from one group to another. Because of this pattern, we were unable to describe a unique social structure and we proposed a promiscuous system for the species. During the 2 year study, we identified only adult bats inside cavities, while newborns were observed roosting outside cavities in adjacent walls. Resting was the most common activity inside cavities, but visits and copulations were also recorded. In groups of Nyctinomops laticaudatus both sexes are presented and differ with other bats due to their lower degree of cohesiveness.

de Ressel K.A.,Federal University of Goais | de Lima-Ribeiro M.S.,Laboratorio Of Macroecologia | dos Reis E.F.,Curso de Ciencias Biologicas
Ciencia Rural | Year: 2015

Cajuzinho-do-cerrado (Anacardium humile A. STHIL.) has a wide distribution in areas of the Midwest Brazilian Cerrado, it’s fleshy fruits are widely used by regional populations in an extractive way. Despite the promising agro-economic potential, few studies have been developed to domestication of the species. The study aimed to evaluate twenty different matrices of cajuzinhodo- cerrado, checking how the weight and the storage of cashew nuts are related with the emergence percentage and biometric variables of seedling newly formed. Fifty fruits were collected from twenty different matrices of Anacardium humile inside the Emas National Park, Mineiros, GO. All fruits collected showed matured, developed and yellow pedicels. Seven matrices had an excess number of fruits, so it was harvested 50 other cashew nuts, which were stored in cold and dry chamber for a period of six months. The seedlings emergence rates were satisfactory in both, total experiment and for progeny. Reproduction of Anacardium humile through cashew nuts proved to be promising. Weight of cashew nuts did not affect emergence rates or seedlings biometrics. The storage of nuts for six months for planting in autumn was inefficient. © 2014, Universidade Federal de Santa Maria. All rights reserved.

Diniz-Filho J.A.F.,Federal University of Goais | Rodrigues H.,Federal University of Goais | Telles M.P.D.C.,Federal University of Goais | Oliveira G.D.,Federal University of Recôncavo da Bahia | And 3 more authors.
Molecular Ecology Resources | Year: 2015

The hindcast of shifts in the geographical ranges of species as estimated by ecological niche modelling (ENM) has been coupled with phylogeographical patterns, allowing the inference of past processes that drove population differentiation and genetic variability. However, more recently, some studies have suggested that maps of environmental suitability estimated by ENM may be correlated to species' abundance, raising the possibility of using environmental suitability to infer processes related to population demographic dynamics and genetic variability. In both cases, one of the main problems is that there is a wide variation in ENM development methods and climatic models. In this study, we analyse the relationship between heterozygosity (He) and environmental suitability from multiple ENMs for 25 population estimates for Dipteryx alata, a widely distributed, endemic tree species of the Cerrado region of central Brazil. We propose a new approach for generating a statistical distribution of correlations under randomly generated ENM. The confidence intervals from these distributions indicate how model selection with different properties affects the ability to detect a correlation of interest (e.g. the correlation between He and suitability). Additionally, our approach allows us to explore which particular ensemble of ENMs produces the better result for finding an association between environmental suitability and He. Caution is necessary when choosing a method or a climatic data set for modelling geographical distributions, but the new approach proposed here provides a conservative way to evaluate the ability of ensembles to detect patterns of interest. © 2015 John Wiley & Sons Ltd.

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