#COLLECTING OYSTER SPAT MANUAL#

How it is used / deployed: The trays are piled 3 to 5 high, according to the height of the tide, spat removal is either manual or automatic. Results identified sites supporting high levels of pearl oyster recruitment as a basis for an ongoing national spat collection program, and support better targeting of spat collection activities that maximise oyster supply to the Fijian pearl industry. Oyster spat collection, usually on tidal flats. Their increased efficiency was due to the fact. Results of this research indicate that wild oyster spat collection is a viable option in the initiation of an oyster industry in Georgia and that growers should. Two exceptionally efficient types of collectors were developed. margaritifera based on greater levels of recruitment at these sites. An important phase of the program for the rehabilitation of the once prosperous oyster industry of California has been the development of more efficient collectors for taking natural larvae to be reared on artificial beds. penguin have greater tolerance of more turbid inshore sites than P. penguin ranged from 7.53 cm to 13.62 cm across sites.

penguin were collected from all sites, with the highest number of recruits (495) recorded from Namarai (Viti Levu). margaritifera recruitment during the study and these were generally sites with relatively turbid water. The method employed consisted of collecting oyster spat from rocks or dredging them from natural beds and transferring them to the purpose-built ponds. margaritifera at any site was 8.61 ± 0.30 cm while the smallest was 4.26 ± 0.13 cm. The largest mean dorso-ventral measurement (DVM) of P. margaritifera juveniles were collected from all sites with the highest number of recruits (693) and the highest number of recruits per collector (2.10 ± 0.17) occurring at Nacobau (Vanua Levu). Spat collectors were deployed for a period of 10–15 months when the number of pearl oyster ( Pinctada margaritifera and Pteria penguin) spat attached to each collector was counted and shell size recorded. Spat collection is the process of attracting larval pearl oysters onto artificial substrates, a process commonly used in the pearling industry because it is. Spat collectors consisted of a 100 m longline from which 310 individual spat collectors were suspended. Twenty-nine sites across Fiji were used in this study. The spat / seed is collected by placing bundles of spat sticks in areas where the spat will naturally congregate. This supply can be inconsistent and a research program was implemented to determine recruitment of pearl oysters to spat collectors at sites throughout Fiji as a basis for developing a national spat collection program to improve reliability of oyster supply to the industry. Cultured pearl farming in Fiji relies on wild spat collection to supply the oysters used for pearl production.

Collecting oyster spat