How Do Biologists Deal With the Spread of Quagga?

July 17, 2008

Question: I’ve followed the issue of the spreading Quagga with great interest. I understand the diligence needed to curb this spread but wonder about migrant birds that fly from lake, to aqueduct, to lake, to stream. Is there a logical way in which a marine biologist could address this issue? (Mike S., Simi Valley)

Answer: While it is biologically possible for the transmission of Quagga or Zebra mussel propagules by wildlife or birds, such translocation is not considered significant. According to Invasive Mussel Control Coordinator, Breck McAlexander, he isn’t aware of any way that could completely eliminate this type of movement. However, he thought transmission from wildlife and birds is considered a much lower risk of an eventual new infestation than the greater potential for human-caused spread of invasive Eurasian mussels. He said that this has occurred and can occur in the future from contaminated watercraft or water deliveries. Fortunately, we do have some control over those. Education and vigilance are paramount to prevent this from happening throughout the western U.S., McAlexander said.