When financial markets are not well developed and when shareholders are not well protected, the role of the board of directors becomes more important as the only available control mechanism for management opportunism. Venezuela is an ideal case study to test this proposition because both of these issues are particularly severe. The specific question that we want to answer is: Does corporate the...

An extensive field survey allowed us to expand the geographical distribution of the scorpion Tityus perijanensis in the Perijá range, western Zulia State, Venezuela, including areas where adult cases of severe scorpionism have been reported. 16S ribosomal RNA (rRNA) gene sequencing, DL(50) determination, and native PAGE suggest low genetic and venom proteomic divergence across the distribution ...

für Naturforschung in cooperation with the Max Planck Society for the Advancement of Science under a Creative Commons Attribution 4.0 International License. Dieses Werk wurde im Jahr 2013 vom Verlag Zeitschrift für Naturforschung in Zusammenarbeit mit der Max-Planck-Gesellschaft zur Förderung der Wissenschaften e.V. digitalisiert und unter folgender Lizenz veröffentlicht: Creative Commons Namen...

Venezuela possesses a great variety of coastal environments allowing for a high diversity of marine species. However, systematic studies on marine invertebrates are scarce, especially on polychaetes. The family Syllidae is poorly known, and only 14 genera and 42 species have been reported from this country. A total of 13 genera and 26 species the Syllidae were identified from benthic samples co...

VALENTÍ RULL,∗†† TERESA VEGAS-VILARRÚBIA,† SANDRA NOGUÉ,∗‡ AND OTTO HUBER§∗∗ ∗CSIC-Botanic Institute of Barcelona, Palynology & Paleoecology, Pg. del Migdia s/n, 08038 Barcelona, Spain †University of Barcelona, Department of Ecology, Av. Diagonal 645, 08028 Barcelona, Spain ‡Autonomous University of Barcelona, Department of Animal Biology, Plant Biology and Ecology, Campus Bellaterra, 08193 Bar...

We present a sequence of I-band images obtained at the Venezuela 1m Schmidt telescope during the outburst of the nebula recently discovered by J.W. McNeil in the Orion L1630 molecular cloud. We derive photometry spanning the preoutburst state and the brightening itself, a unique record including 14 epochs and spanning a time scale of ∼ 5 years. We constrain the beginning of the outburst at some...

OBJECTIVE To describe the trends in antibiotic utilization in eight Latin American countries between 1997-2007 METHODS We analyzed retail sales data of oral and injectable antibiotics (World Health Organization (WHO) Anatomic Therapeutic Chemical (ATC) code J01) between 1997 and 2007 for Argentina, Brazil, Chile, Colombia, Mexico, Peru, Uruguay, and Venezuela. Antibiotics were aggregated and ...

Coronado A. 2006. Ixodiphagus hookeri Howard, 1907 (Hymenoptera: Encyrtidae) in the brown dog tick Rhipicephalus sanguineus Latreille, 1806 (Acari: Ixodidae) in Venezuela. Entomotropica 21(1):61-64. Nymphs of the ixodid tick Rhipicephalus sanguineus were found naturally infected by the tiny wasp Ixodiphagus hookeri. The parasitism resulted in the death of the host ticks, as cause of ingestion o...

Ten new Neotropical species of Chimarra are described in the subgenera Chimarra, Chimarrita, and Otarrha. New species in the subgenus Chimarra include, in the Chimarra ortiziana group: Chimarra calorisp. n. (southeastern Brazil) and Chimarra onchyrhinasp. n. (Venezuela); in the Chimarra picea group: Chimarra inchoatasp. n. (Venezuela), Chimarra nicehuhsp. n. (Venezuela), and Chimarra sunimasp. ...

This is the first part of a series of studies related to mosquito ecological and biogeographic aspects. A total of 69 mosquito species (Diptera: Culicidae) was collected in 16 localities sampled in the Gran Sabana Municipality, Canaima National Park, and Venezuela. Twenty-seven mosquito species are recorded for the first time from Bolívar State, Venezuela. Five of them species are reported for ...