A new terrestrial species of Pseudoeurycea is described from the mountains of the Mixteca region of Oaxaca. Compared with other members of the genus, the new species is relatively slender and short-legged. The background color of the dorsum of this…

A new tertiary stibine and bismuthine containing C-heterocyclic selenophene ring have been synthesized. Tris(2-selenophenyl)stibine (1) and tris(2-selenophenyl) bismuthine (2) and characterized by IR, MS, H-1, C-13, COSY, HETCOR NMR spectroscopy. Crystal structures of stibine and bismuthine have been determined. In…

Los bosques secos neotropicales son reconocidos como uno de los ecosistemas más amenazados del mundo. La acelerada pérdida de cobertura vegetal de estos bosques ha ocasionado que, en la actualidad, se encuentren restringidos a una pequeña fracción de su área…

The bivalve Limnoperna fortunei (Dunker, 1857), also called golden mussel, is native to Asia but becoming dispersed around the world. The golden mussel resembles the invasive dreissenid bivalves in many respects, and although much less studied it evidently has broader…

Se presentan los resultados de más de veinte años de labor y experiencia en la investigación bioarqueológica con inserción efectiva en equipos de arqueología. Se consideran cambios importantes en el devenir histórico de la disciplina y el estado actual de…

In numerous animal groups, individuals within the group often wish to impose
their preferences and guide the group in a certain direction. Conflicting preferences are
common in these situations and, in order to maintain group cohesion, collective decisionmaking
needs to…

The regime of floods and droughts in the Pantanal wetlands determines the distribution and abundance of the wildlife, vegetation and ecological processes. Cattle ranching and fisheries, the main economic activities in this floodplain, are extremely influenced by and depend on…

In the United States, healthcare-associated infections are a huge source of medical and
economic burden. Annually, there are 1.7 million cases of healthcare-associated infection in
U.S. hospitals, which cause an estimated 98,987 deaths. Direct medical cost is also massive,
estimated…

Howler monkeys (Alouatta sp.) use loud call vocalizations for both intra-group
and intergroup communication (Oliveira & Ades, 2004; Whitehead, 1989; da Cunha
& Byrne, 2006; Holzmann, 2012). While much of the literature focuses on the effect
of loud call vocalizations…

In polyandrous species, sexual selection acts both before (precopulatory) and after
(postcopulatory) mating on traits that are important for reproductive success. Precopulatory traits
are important for mate acquisition and include weapons and ornaments. Postcopulatory traits
include components of sperm quantity…