The carrying capacities of Manila clam Ruditapes philippinarum in Jiaozhou Bay aquaculture areas were estimated by an ecosystem model established by actual determination via concentration of phyto-plankton and primary production ,and food budgets .The results showed that the maximal carrying capaci-ty of the clam was observed in various sizes of the clam in winter (January or March) and the minimal in September .The average carrying capacity in the aquaculture areas was shown to be 603 ind ./m2 in the clam with shell length of 2-2 .6 cm ,441 ind ./m2 in the clam with shell length of 2 .6-3 .3 cm ,and 362 ind ./m2 in the clam with shell length of 3 .3 -4 cm ,indicating that the stocking density of the clam was saturated in Jiaozhou Bay w here the appropriate reduction in density w as necessary to maintain the maximal yield ,high clam quality and low seeding cost .It is recommended that the stocking density of the clam be 718 ind ./m2 in Hongdao East zone ,693 ind ./m2 in Hongdao South zone ,557 ind ./m2 in Hongdao West zone ,805 ind ./m2 in Jiaozhou zone ,and 654 ind ./m2 in Huangdao zone ,with the average stocking density of 690 ind ./m2 .%贝类的养殖容量是养殖功能海域的生态系统所能容纳的最大养殖个体数量.本文由实测资料建立了胶州湾生态模型 ,计算了浮游植物生物量 ,进而依据饵料收支平衡关系 ,估算了胶州湾菲律宾蛤仔的养殖容量 ,研究结果表明 ,各养殖区不同规格蛤仔的养殖容量在1月或3月份最大 ,9月份最小 ;胶州湾5个养殖区内 ,2~2.6cm、2.6~3.3cm和3.3~4cm3种壳长规格菲律宾蛤仔的平均养殖容量分别为603枚/m2 、441枚/m2和362枚/m2 ,胶州湾菲律宾蛤仔的播放密度已经饱和 ;为了保持最大产量、提高养殖品质的同时并将苗种成本降至最低 ,可适当降低播放密度 ;建议红岛东、红岛南、红岛西、胶州、黄岛等5个养殖区菲律宾蛤仔的放养密度分别为718枚/m2 、693枚/m2 、557枚/m2 、805枚/m2和654枚/m2 ,胶州湾平均放养密度为690枚/m2 .
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