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Use of natural trophic resources by Eastern oysters and Pacific oysters of different ploidy

Aquaculture and Fisheries 2021年第1期6卷 75-83页

作者： Darien D.Mizuta Gary H.Wikfors Shannon L.Meseck Yaqin Li Mark S.Dixon Hyun Jeong Lim In Joon Hwang MagalíBazzano steven pitchford Northeast Fisheries Science Center(NEFSC) NOAA212 Rogers AveMilfordCT06460USA East Sea Fisheries Research Institute National Institute of Fisheries ScienceGangneung25435South Korea West Sea Fisheries Institute National Institute of Fisheries ScienceIncheon22383South Korea

Ploidy manipulation,such as triploidy,in farmed oysters has been used as a tool to enhance oyster quality throughout all seasons because triploid oysters allocate less energy to gametogenesis,and therefore are deemed better performers than fertile ***,scientific reports describing no differences between ploidies and,in certain conditions,disadvantages of triploids are not *** the use of triploid oyster seed increases culture cost for growers,consistency in performance of triploids is considered to be an important ***,research to assess how ploidy affects physiological processes underlying oyster performance is fundamental for the aquaculture *** work was undertaken to assess if ploidy-based differences in performance in the two most commonly cultivated commercial species of oyster in the United States,Crassostrea virginica and Crassostrea gigas,are associated with filtration,feeding,and *** test this hypothesis,biodeposition measurements were made with oysters exposed to ambient water conditions at locations and seasons providing a variety of environmental *** did not show differences in filtration and feeding associated with ploidy,but physiological feeding variables fluctuated with environmental characteristics associated with spatial and seasonal differences.A preliminarily test of the hypothesis that differences in energy metabolism may account for differences in performance among ploidy levels indicates that basal metabolic rates of diploid,triploid,and tetraploid Eastern oysters are not different.

关键词： Ploidy Farmed oysters Feeding Biodeposition Seston Metabolism

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