Pipelines carrying crude oil to ports in British Columbia may spell bad news for salmon, according to a new University of Guelph-led study.Exposure to an oil sands product – diluted bitumen – impairs the swimming ability and changes the heart structures of young salmon.The research will be published in the journal Environmental Toxicology and Chemistry, and is available online now.It's a timely finding, says U of G post-doctoral researcher and lead author Sarah Alderman.The National Energy Board (NEB) recently approved the controversial Trans Mountain pipeline expansion project; the federal government is expected to make a final decision by December.