Barietin, a snake venom vascular endothelial growth factor from puff adder Bitis arietans venom, increases the heart rate with minor effect on blood pressure in rats

Posted by
  Barietin, a snake venom vascular endothelial growth factor from puff adder Bitis arietans venom, increases the heart rate with minor effect on blood pressure in rats ABSTRACT Snake venom vascular endothelial growth factors (svVEGFs) are homodimeric proteins comprising two equal subunits bound by two intermolecular disulfide bonds. The main biological effects of svVEGFs are local vasodilatation, increasing of vascular permeability, and hypotension. Barietin, a svVEGF purified from the venom of puff adder Bitis arietans , differs from other representatives of this toxin family by its shortened C-terminal amino acid sequence. No data about barietin effects on hemodynamics are available. Studying those in rats we found that barietin at a dose of 1 mg/kg significantly increased heart rate, exerting only a minor influence on blood pressure. In this respect, it differs from other svVEGFs having a significant effect on blood pressure. We aimed to find the barietin active fragment which m...

The role of social media groups on illegal wildlife trade in four Mexican states: A year-long assessment

Posted by


 

The role of social media groups on illegal wildlife trade in four Mexican states: A year-long assessment


Abstract

Illegal wildlife trade consists of harvesting wildlife products and undertaking its trade contrary to national and international laws. It has become one of the main threats to wildlife, along with habitat loss and the introduction of exotic species. The Internet modified how illegal trade works as it increases species exposure and market venues. Although it is a critical problem in Latin America, it has received limited attention. A region worth studying is the country of Mexico, as it is a megadiverse country, has multiple commercial treaties, and is considered an active part of the wildlife trade. Thus, our objective was to determine the role of social media in illegal trade in Mexican states with different income levels. We looked for social media groups that serve as virtual marketplaces in the states of Estado de México, Guerrero, Jalisco, and Oaxaca. We comprehensively monitored the groups from January 1, 2019, until December 31, 2019. We browsed all the posts listed for sale and recorded all the available information, including the legal status of the individual. We found 175 posts in nine groups that offered 392 wildlife individuals. We registered 90 different species, of which 39 were mammals (202 individuals), 26 were birds and 23 were reptiles, with a total estimated selling value of US$ 683,967. Furthermore, we detected a significant difference between the number of individuals of mammals, birds, and reptiles sold. Our analysis indicates a large number and diversity of species being sold in social media confirming its importance as a virtual marketplace for biodiversity trade and not only for regional species.

Roxana Iveth Salas-Picazo, O. Eric Ramírez-Bravo, Isaac Meza-Padilla, E. Evangelina Camargo-Rivera,
The role of social media groups on illegal wildlife trade in four Mexican states: A year-long assessment,
Global Ecology and Conservation, Volume 45, 2023, e02539, ISSN 2351-9894, https://doi.org/10.1016/j.gecco.2023.e02539.