Hawaiians developed elaborate aquaculture and agricultural systems, including fish ponds, that fed a dense population before European arrival. “They were a sustainable way of creating food for the population and quite a beautiful engineering design,” said Kiana Frank, an assistant research professor at the Pacific Biosciences Research Center (PBRC).
Fish ponds were constructed in estuaries. Dykes built of rock and earth enclosed part of an estuary and sluice gates allowed fresh and salt water — and the nutrients they carried — to enter and exit with the tides. The gates also allowed young fish, especially mullet, to enter the ponds and eat micro-organisms that the Hawaiians encouraged.
Read more about it in The Press.