The models developed in this study provide valuable new information for prospective pearl oyster spat and mabé pearl farming community groups, donors, funding bodies and other stakeholders, and provide a valuable extension tool supporting further development of the pearl sector in Fiji and the broader Indo-Pacific region. Spat collectors deployed in October and January, during Fijis warmer summer season, generated higher numbers of oysters than those deployed in the cooler. Incorporating production and price risk into the model reduced the expected NPV of the mabé pearl farm to $297,507. The MIRR and benefit-cost ratio of the modelled mabé pearl farm were 22.64% and 7.24, respectively, with a payback period of 3 years. Annual production of 5400 mabé pearls generated an NPV of $491,864. penguin oysters with an estimated capital cost of $7319. The downstream mabé pearl farm modelled in this study comprised two 100-m longlines supporting 2000 implanted Pt. Spat collectors used in oyster cultivation at the Mimbeau at Cap Ferret in the Gironde region 48220 Oyster spat, one month old, on the shells of the. The MIRR generated was 12.24%, with a benefit-cost ratio was 1.52, and a payback period of 4 years. margaritifera pearl oysters (sold to round pearl culture operations) with estimated NPV of $10,439. The spat collection operation produced 2332 saleable P. The spat collection farm modelled in this study comprised four 100-m longlines supporting 1240 commercial spat collectors, with an estimated capital cost of $1245 (all figures in USD). ![]() margaritifera spat collection operations, for mabé pearl production. This study determined the potential profitability of (1) community-based pearl oyster spat collection operations targeting Pinctada margaritifera, and the subsequent sale of pearl oysters to round pearl farms and (2) the use of Pteria penguin, collected incidentally from P. ![]() Improved oyster production, using spat collectors only, should deploy collectors during Fiji’s warmer summer season for a 14-month duration.Cultured pearl production, and associated activities, are of crucial social and economic importance to remote coastal communities in Polynesia and the western Pacific. Ruben Rabe, Department ofAgriculture Municipal Agricultural Officer handles a spat collector. This assessment is based on production estimates only and detailed cost-benefit analysis is recommended to account for the additional equipment costs and labour inputs required after spat collector harvest. Oyster spats are greenish brown attachments on the oyster shell that are nearly flat compared with barnacles that protrude. Results indicate that, of the options tested, the most profitable for pearl oyster spat collection in Fiji is to harvest spat collectors after 14-months then grow oysters in panel nets for a further 6-months. However, oysters removed from spat collectors after 8-months and grown in panel nets for a further 6-months were smaller than those retained on spat collectors for the same 14-month period. Harvested oysters grown in panel nets during intermediate culture increased significantly in size and weight with 100 % survival. Shorter spat collector deployment duration of 8-months generated similar numbers of oysters to those of 14-months however, oysters harvested after 8-months were smaller (20.4 ± 1.8 g) than those harvested after 14-months (89.2 ± 3.2 g). The average numbers of spat harvested from spat collectors deployed for 6-month, 8-month, and 14-month periods were 0.6, 1.8, and 1.7 spat per collector, respectively. Spat collectors deployed in October and January, during Fiji’s warmer summer season, generated higher numbers of oysters than those deployed in the cooler winter season. We investigated the influence of the timing and duration of spat collector deployment on these parameters, and the potential for early removal of juveniles from spat collectors for intermediate culture. ![]() Most oysters are collected by community-based spat collection enterprises but there is little information on the optimal duration of spat collector deployment, which potentially affects oyster yield, oyster size, and the sales value of resulting oysters. 101288 ISSN: 2352-5134 Subject: Pinctada margaritifera, aquaculture, cost benefit analysis, labor, oysters, summer, winter, Fiji Abstract: Fiji’s cultured pearl sector relies on wild collected oysters (Pinctada margaritifera) for culture stock. Southgate, Pranesh Kishore Source: Aquaculture reports 2022 v.26 pp. Optimizing community-based pearl oyster (Pinctada margaritifera) spat collection strategies in the Fiji Islands Author: Charlene Erasito, Rajesh Prasad, Paul C.
0 Comments
Leave a Reply. |