That being said, the recovery of that 100 tonnes is only marketable on the kelp that you harvest. In an open pond, there is no web for them to spawn on. The spawn that doesn't go on your kelp will be distributed among the rocks and the other seaweed that happen to be in the area. So there is no “waste”, shall I say, of eggs that are deposited on the web.
On June 8th, 2006. See this statement in context.