February 6, 2001 Blacklip Pearl Fishery Real Video 56k 200k
This is Genevieve Johnson speaking to you from Tarawa atoll. Fishing in the sea is comparable to hunting on land, it is easy to overharvest populations of wild animals. As a result, populations of many wild fish and shellfish are rapidly declining, while production of aquaculture is increasing. Aquaculture is the farming of marine and freshwater species in captivity. Today some of the crew were given a tour of the Blacklip Pearl Oyster Nursery in south Tarawa.
Black pearl oyster shells and cultured pearls are a potential source of export income here. A collaborative project between Australia and Kiribati has been established. The objective is to assist Kiribati in developing an industry for culturing Blacklip pearls. Low technology hatchery and nursery culture methods have been developed during the first phase of the project. It is hoped that the oysters will yield their first viable harvest of black pearls in 2002.
James Whitford is the Project scientist for the Pearl Oyster Resource Development Project:
We hang culture units off the long line, we hang the oysters at a depth of about one or two meters from the surface. Depending how big they are, we first deploy them in the nets and then in plastic crates, which are about one meter by half a meter. Once the animals reach ten to twenty millimeters in diameter we put them into what we call pocket nets which tend to be a meter by forty or fifty centimeters, which are sown to form pockets.
The idea is to start generating an industry based around the hatchery, so the hatchery will be extended and micro farms developed where you have one thousand shells in a family situation on an outer island. On paper it looks like those people will be able to cover a bank loan of twenty-five thousand dollars after three years. They will be in possession of a substantial amount of infrastructure, a boat and a long line for growing the pearl oysters. They will then be able to start increasing that every three years by about five thousand dollars. The next three years, thirty thousand and the boat and equipment should last about ten years. They will have a chance to reinvest into oysters, which the government will have to produce under some sort of arrangement and increase the size of their farms." A Black pearl oyster shell. Photo: Genevieve Johnson The Japanese are also funding hatcheries for sea cucumber and trochus snails in Kiribati, projects similar to that of the blacklip pearl fishery, these are also in the testing and development stages. Aquaculture may appear simple but it requires regular maintenance of an environment conducive to growth, including the eradication of predators and algae, control of diseases, and the stability of temperature light and salinity. Three different food types are currently being tested on a single species of cucumber to establish the fastest rate of growth, therefore the highest rate of production. The sea cucumbers will be grown and harvested as a food source for the Japanese market. The trochus snails are grown in large tanks where they feed on algae. Their shells are in high demand in Japan where they are used to make buttons.
These fisheries are examples of the aquaculture programs being implemented in the South Pacific
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