| http://www.w3.org/ns/prov#value | - For example, to feed oysters, clams and the like, this means that large-scale algal ponds or reservoirs are required in which phytoplankton can be maintained in a state of bloom uninterruptedly for long periods of time, such as 30 to 60 days, and while a high percentage of its volume (such as one-half to two-thirds) is harvested continuously.
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