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| Live Food Supply Regionalization of Filtering Feeder Shellfish in Northern Yellow Sea |
| ZHANG Xue1, SONG Lun2, FU Jie2, WANG Kun2, LIU Yin3, LIU Suxuan3 |
1. Liaoning Natural Resources Service Center, Shenyang 110001, China;
2. Liaoning Ocean and Fisheries Science Research Institute, Dalian 116023, China;
3. Dalian Ocean University, Dalian 116023, China |
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Abstract The live food supply capacity of eukaryotic microalgae were determined in eukaryotic microalgae samples and chlorophyll a samples collected at 53 sampling sites in the northern Yellow Sea in May (spring), August (summer) and October (autumn) of 2019 by high throughput sequencing-molecular identification classification technique. The results showed that there were microalga biomass of (39±10)% in spring, (35±14)% in summer and (38±11)% in autumn in the northern part of the Yellow Sea, with the maximal live food supply capacity (an average of 0.86) of filter feeding shellfish in spring, followed by in autumn (0.41), and the minimal (0.30) in summer. There was relatively high live food supply capacity in the waters of Lvshun, and Zhuanghe in Dalian and Yalu Rivers, and relatively low live food supply capacity in Changhai County and the offshore sea. The actual live food supply capacity of shellfish in the northern part of the Yellow Sea was 151 g/m2 in spring, 51 g/m2 in summer and 96 g/m2 in autumn. The sustainable culture capacity of Manila clam Ruditapes philippinarum was 100 g/m2 in spring, 34 g/m2 in summer and 63 g/m2 in autumn, and the capacity of shellfish cultivation in the northern part of the Yellow Sea was mainly contributed to spring and autumn.
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Received: 21 August 2020
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