Linda J. Walters
Department of Biology, UCF, Orlando Florida
[email protected]
Professional aquarist and hobbyists are thought to be the source of invasions of aquarium strain of the green macroalga Caulerpa taxifolia in the Mediterranean, southern California, and Australia. The US Department of Agriculture, Animal and Plant Health Inspection Service (SUSDA-SPHIS) restricted interstate commerce and importation of the Mediterranean clone of C. taxifolia prior to the California invasion and is currently deciding if it should strengthen regulations of the genus as more species of Caulerpa are being described as invasive Here we document the importance of e-commerce as a mode of dispersal for many species of Caulerpa in the United States. We purchased Caulerpa from 30 Internet retailers and 60 Internet auction sites representing 25 states and Great Britain. Twelve different Caulerpa species were confirmed using DNA sequencing. Only 10.6% of sellers provided the correct genus and species names with their shipments. Thirty purchases of "live rock" provided four species of Caulerpa, as well as 53 additional marine species. Our results confirm the extensive e-commerce availability of this invasive genus and its high dispersal potential via postal services and hobbyists. We recommend that both eBay and the USDA maximize regulation of Caulerpa.
I typed this abstract out from the Journal as it is not online as of 3-10-06. So any typeos, (misspellings) are most likely mine.
I would suggest emailing the author and asking for a PDF reprint of the paper. I can make a PDF from the Journal but its not exactly legal to email it around.
It's a well conducted study, paper doesn't really take sides or make outrageous statements, the authors don't seem to be against the aquarium trade, more pointing out a source of concern. They do in their last paragraph discuss education as the best bet for prevention of releases.
Also I wonder why they authors were not at Marine Ornamentals in Las Vegas.
Personally I don't see any difference between online vs. LFS purchases of live rock or algae other than the interstate commerce part of it. So how does this effect live rock? I think that is the real question here.
Also, I think eBay needs someone on staff or contacted to check their auctions for species names and such used. May people sell snails and other animals under the wrong name to get higher prices.
This paper will be used by regul
ators and that is the most important thing about it.
Here is some Kalculations the authors use, to justify regulation.
"The $5 million spent on Caulerpa eradication in California would be equivalent to 142,857 purcahses of loose Caulerpa at an average of $35 per purchase. If 1% of these hobbyists dumped Caulerpa into nearby waters and 1% of these releases becamed established then at least $70 million (14 eradications X $5 million/reponse) will be required to achieve eradication. Pressuring eBay to eliminate all auctions of caulerpa and enchance federal regulation of Caulerpa would be considerable more cost-effective"