Erwin H. Bulte et al. (2003) note that the rules of the Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES) ban trade in products from endangered but not extinct species. They argue that governments may therefore have incentives to strategically kill off all their elephants so as to secure the end of the ban on ivory trading. This incentive will be stronger i...

Background: The apparent rediscovery of the Ivory-billed Woodpecker Campephilus principalis in Arkansas, USA, previously feared extinct, was supported by video evidence of a single bird in flight (Fitzpatrick et al, Science 2005, 308:1460–1462). Plumage patterns and wingbeat frequency of the putative Ivory-billed Woodpecker were said to be incompatible with the only possible confusion species n...

Effective and practical control of reproduction is the major constraint in tilapia culture. Uncontrolled reproduction can result in less than 25% of the adults being greater than 250 g after a six-month culture period, with the majority of the population being progeny less than 10 g each. Intraspecific breeding programs have been developed to exploit the sex inheritance mechanism in the tilapia...

One of our first priorities, after the first week of the December 2008 rebellion had passed, was to record its most important events so that comrades abroad could have some first-hand information. The recording took the form of a rough chronology of the events in Athens, supplemented with a chronology of what had happened in Thessaloniki which was written by the Blaumachen group and other comra...