LONDON, Dec. 28 (UPI) -- Fertilizing fish ponds with poultry feces to promote fish growth -- a common practice in Asia -- may set up reservoirs of bird flu, say British researchers. BirdLife International -- a Cambridge, England,-based umbrella organization for bird protection groups in 100 countries -- says if chickens infected with bird flu are providing the manure for fish ponds, that could be how the new potentially deadly strain of avian influenza, H5N1, is being spread, reported the Independent Wednesday. BirdLife says outbreaks of H5N1 have occurred in locations in China, Romania and Croatia where there are fish...