Effective care and prevention strategies have managed to reduce the spread of HIV in the U.S. and other resource-rich countries. But in sub-Saharan Africa, where more than 25 million are infected, the epidemic rages — as does the debate over how to stop it. (more…)
Acoustic disturbance has different effects on different species of fish, according to a new study from the Universities of Exeter and Bristol which tested fish anti-predator behaviour.
Three-spined sticklebacks responded sooner to a flying seagull predator model when exposed to additional noise, whereas no effects were observed in European minnows.
Lead author Dr Irene Voellmy of Bristol’s School of Biological Sciences said: “Noise levels in many aquatic environments have increased substantially during the last few decades, often due to increased shipping traffic. Potential impacts of noise on aquatic ecosystems are therefore of growing concern.” (more…)
