Control of biofouling on pearl oysters Pinctada imbricata using wax and Chinese herbs |
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Authors: | Lingtong Ye Lin Wu Zhaorui Wang |
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Affiliation: | 1. Key Laboratory of Aquatic Product Processing, Key Laboratory of South China Sea Fishery Resources Exploitation &2. Utilization, Ministry of Agriculture and Rural Affairs, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, China;3. College of Fisheries and Life science, Shanghai Ocean University, Shanghai, China;4. College of Fisheries, Tianjin Agricultural University, Tianjin, China |
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Abstract: | AbstractBiofouling poses severe challenges to pearl oyster Pinctada imbricata culture in China, and controlling it is both labor- and capital-intensive. The antifouling properties of wax, and wax mixed with Chinese herbs, sprayed onto pearl oyster shell surfaces during peak biofouling seasons were evaluated. Pearl oysters coated with three wax treatments (plain wax, Chinaberry seed extract, Chinese honeylocust fruit extract) and a control (no treatment), were cultured in nets for up to 60?days. Mortality rate, fouling organism and pearl-oyster weights, and shell height are reported for individual oysters on each of six sampling dates. With the exception of oysters submerged for 12?days, all oysters were significantly affected by treatment type and submersion duration. Fouling weight increased more rapidly over time in the control-treatment oysters. Wax-based coatings deterred fouling-organism settlement on oysters for at least 2?months during the intensive fouling season, reducing mortality and not adversely effecting growth. |
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Keywords: | Wax Chinese herbs biofouling Pinctada imbricata coating antifouling |
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