Animal 0 Posté(e) le 4 mars 2008 Vet college solves lab fish kill mystery Last Updated: Friday, February 29, 2008 | 7:10 AM AT CBC News Charlottetown's Atlantic Veterinary College has determined what killed hundreds of young fish in one of its labs. The finger-sized fish were in the freshwater lab, mostly trout and salmon, many involved in vaccine trials, when they died suddenly over the Thanksgiving weekend. Within days the college was focusing its investigation on contaminated well water. After a few weeks, it determined the problem was chlorine. Concentrations were very low, but enough to kill the young fish. "Once we found the chlorine as the source, we did a videotape of the sewer lines and it was not until we actually went into the reservoir that a small hole was found," Doctor Bart Gragtmans, director of animal resources, told CBC News this week. Groundwater contaminated The hole in the reservoir was allowing lab waste water that had been treated with chlorine to seep into the ground and back into the lab's well-water supply. When the hole was filled, the problem was solved. The fix put to rest speculation over other possible sources. "Some problems are easy to fix. Some are easy to find," said Gragtmans. "We had to consider so many possibilities here. You're talking about underground sewer lines, so it was not easy to find that. Sometimes these things take time." AVC has not calculated the cost of finding and fixing the problem. The real toll, it said, was in lost research. The experience also showed how easily ground water can be contaminated, and difficult to clean up. http://www.cbc.ca/canada/prince-edward-island/story/2008/02/29/fishkill-solved.html Partager ce message Lien à poster Partager sur d’autres sites
