Metamorphosis of larvae of Crassostrea virginica fed microencapsulated diets |
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| Affiliation: | 1. Center for Genetic Epidemiology and Genomics, School of Public Health, Medical College of Soochow University, Suzhou, Jiangsu 215123, PR China;2. Jiangsu Key Laboratory of Preventive and Translational Medicine for Geriatric Diseases, School of Public Health, Soochow University, Suzhou, Jiangsu 215123, PR China;1. Institute of Plant Breeding and Genetic Resources, HAO ELGO-DEMETER, Thermi, Thessaloniki 570001, Greece;2. National Greek Gene Bank (GGB), Thermi, Thessaloniki 570001, Greece;3. Institute of Applied Biosciences, CERTH, Thermi, Thessaloniki 570001, Greece;4. Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai, Thailand;5. Center of Excellence in Bioresources for Agriculture, Industry and Medicine, Chiang Mai University, Chiang Mai, Thailand;1. KL University, Vaddeswaram, Guntur 522502, Andhra Pradesh, India;2. Professor Jaya Shankar Telangana State Agricultural University, Hyderabad 500030, Telangana, India;1. Biotechnology and Drug Development Research Laboratory, School of Pharmacy, Curtin Health Innovation Research Institute, Curtin University, Perth, WA, Australia;2. Department of Pharmacology, Toxicology and Clinical Pharmacology, Faculty of Medicine, University of Novi Sad, Novi Sad, Serbia;3. Department of Pharmacy, Faculty of Medicine, University of Novi Sad, Novi Sad, Serbia |
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| Abstract: | This paper reports the results of two feeding experiments in which oyster larvae (Crassostrea virginica) were grown to metamorphosis on microencapsulated diets, and provides the first successful case of culturing oyster larvae to metamorphosis on an artificial diet. Five to 25% of the larvae fed microencapsulated diets grew to the “eyed” stage in 22–25 days. About 2–20% of these “eyed” larvae metamorphosed and settled and 25–40% of these settled larvae produced spat (> 0.05 mm). Two concentrations of two microencapsulated diets were tested; results indicated that diet concentration affects larval growth and development.Microcapsules with capsule walls made of a lipid mixture containing ethyl cellulose and stearic acid improved the retention of water-soluble components. Capsules were more stable at low temperature (5°C) than at higher temperatures (22 and 28°C). Inclusion of lipid algal extract in gelatin-acacia capsules promoted better growth of larvae than those not containing the algal extract. This suggests that attractants or phagostimulants could play an important role in microencapsulated diets. |
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