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| Comparison of Artificial Breeding and Farming of Pacific Oyster Crassostrea gigas in Beibu Gulf and Laizhou Bay |
| CHU Hongyong, ZHANG Lan, ZHAO Qiang, CHEN Xiangtang, WANG Xiaofei, ZHANG Jianbai |
| Yantai Marine Economic Research Institute, Yantai 264000, China |
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Abstract In this study, the artificial breeding of Pacific oyster Crassostrea gigas was carried out in Beibu Gulf, Guangxi, and Laizhou Bay, Shandong, respectively, and the hatchery performance of the same batch of broodstock were compared in both sites, as well as the grow-out traits of their offsprings. The artificial breeding of Pacific oyster was carried out simultaneously in Beibu Gulf and Laizhou Bay from March to September 2018, and the oyster grow-out research was deployed from October 2018 to December 2019. It was found that the fertilization rates were (95.62±2.09)% and (94.07±0.65)% (P>0.05), the hatching rates (88.83±1.40)% and (91.69±2.49)% (P>0.05), and the metamorphosis rates (18.95±2.36)% and (11.65±2.45)% (P<0.05) in Laizhou Bay and Beibu Gulf, respectively, indicating that the performance of artificial breeding of Pacific oyster in Beibu Gulf by using natural seawater, with the lower efficiency of breeding in Beibu Gull than that in Laizhou Bay. The growth rate of Pacific oyster larvae was significantly higher in Beibu Gulf than that in Laizhou Bay (P<0.05), while the mortality rate in Laizhou Bay was significantly lower than that in Beibu Gulf (P<0.05). The grow-out experiment showed that both two kinds of seeds had high mortality during cultivation in Beibu Gulf, that grow-out well in the Yellow Sea farms (P>0.05), indicating that the transplanting of Pacific oyster in the north and south China is viable. To take the advantage of the higher water temperature in south China carrying out artificial breeding of Pacific oyster, and transplanting them in north China, could help reduce the cost of Pacific oyster breeding and improve the profit of Pacific oyster farming.
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Received: 27 October 2021
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