biologists looking for assistance
Out of curiosity, why not examine the contents of the ballast water transported by tankers between ports? I recall reading recently that they were actually a large contributor to the spread of invasive species throught the world''s shipping ports. By comparison, to focus upon a few tidbits on a few recreational boats seems peculiar. I am often baffled by the frequent focus on second- and third-order effects while the first-order stuff gets ignored when it isn''t sexy.
Without besmirching the intentions of the biologists making the initial request, I fear this leading to a headline that reads "Yachties Responsible for Wildlife Devastation". I hope that is not their intention.