Virtual duck bills demonstrate species coexistence
... to resources necessary for its survival. Although coexistence is often attributed to interspecific differences in morphology, direct evidence is relatively rare. Dabbling ducks, which include the ubiquitous mallard, are a good example. Dabbling ducks are primarily filter-feeders. They use lamellae, which are co...Human behavior changes the number of strains of infectious diseases
...t is all-important. The researchers found that the coexistence of multiple infectious disease strains result from monogamous populations. "When people are serially monogamous (that is, interactions take place one at a time), groups with different behavior favor strains with different properties," explain the a...PET/CT can identify new cancer lesions at early stage, allowing for prompt treatment
...ocus on a patient's primary disease and incidental coexistence of another primary malignant lesion can be missed. "Such newly identified lesions are often of early stage and have a better likelihood of being cured if treated promptly and aggressively," indicated Wahl, the senior author who co-wrote the JNM artic...A new study examines how shared pathogens affect host populations
...Volker H. W. Rudolf and Janis Antonovics, "Species coexistence and pathogens with frequency-dependent transmission" 165:7 July 2005. ...