Video | Business Headlines | Internet | Science | Scientific Ethics | Technology | Search


Stowaway mussel invades Pearl Harbour

Victoria University researchers Jonathan Gardner and Smita Apte have used DNA detective work to track a stowaway mussel colony all the way from the Pacific coast of the United States to Pearl Harbour, Hawai’i.

Dr Gardner says the tenacious blue mussel, which stowed away on the USS Missouri, has defeated the best efforts of the American navy to prevent a biological invasion of Pearl Harbour.

“The USS Missouri was originally moored close to a mussel farm at Bremerton, Washington,” said Dr Gardner. “That’s where the mussels first got on board.”

“They then traveled with the USS Missouri to Astoria, Oregon, where the ship was moored for nine days in an attempt prevent a biological invasion of Pearl Harbour. However, the mussels not only survived the mooring, but appear to have thrived during their two-week tow across the Pacific to Pearl Harbour.”

“No sooner did the mussels reach Pearl Harbour than they started spawning. More very young mussels were then found in a submarine moored in Pearl Harbour.”

“This shows how Pearl Harbour could be used by the mussels as a stepping stone for further invasions, and why the prevention of even temporary biological invasions is really important. Close monitoring of the situation within Pearl Harbour and the spread of the mussels outside is needed.”

Dr Gardner says the 70-80 mm blue mussels, which are eaten widely overseas, are extremely dominant. “They’ve got an ability to out-compete many native species.”

DNA analysis has definitively identified the mussels as Mytilus galloprovincialis, a species which also occurs in Wellington Harbour. While it is not known whether the species was introduced to New Zealand or occurred here naturally, researchers believe it has invaded Japan, Hong Kong, South Africa and California within the last 150 years.

Victoria University Wellington

© Scoop Media

Business Headlines | Sci-Tech Headlines


20,000 Still To Go: MPI Releases Imported Apple And Stonefruit Plants

Around 20,000 apple plants and 400 stonefruit plants imported from a US testing facility have been released from all restrictions, says the Ministry for Primary Industries (MPI). More>>


Space: They Landed Robots On An Asteroid

On September 21, the small compact MINERVA-II1 rovers separated from the Hayabusa2 spacecraft... both rovers landed on the surface of asteroid Ryugu. The two rovers are in good condition and are transmitting images and data. More>>

RNZ: Court Of Appeal Rejects NZME-Stuff Merger

The Court of Appeal has turned down the proposed merger between media companies NZME and Stuff... The Commerce Commission had turned down the merger because of concerns about concentrating too much commercial and editorial power in one organisation. More>>


Cut Before Using: Australian Strawberries Withdrawn

Needles were found in a punnet of strawberries sourced from Western Australia, which was bought in a Countdown supermarket in Auckland. The Choice brand of strawberries was sold nationwide last week. More>>