Assessing the carrying capacity of tilapia in an intertidal mangrove-based polyculture system of Pearl River Delta, China
文献类型: 外文期刊
作者: Xu, Shannan 1 ; Chen, Zuozhi 1 ; Li, Chunhou 1 ; Huang, Xiaoping 2 ; Li, Shiyu 3 ;
作者机构: 1.Chinese Acad Fishery Sci, Key Lab Mariculture Ecol & Qual Control, Minist Agr, S China Sea Fisheries Res Inst, Guangzhou 510300, Guangdong, Peoples R China
2.Chinese Acad Sci, Key Lab Marine Bioresources Sustainable Utilizat, S China Sea Inst Oceanol, Guangzhou 510301, Guangdong, Peoples R China
3.Sun Yat Sen Univ, Sch Environm Sci & Engn, Guangzhou 510275, Guangdong, Peoples R China
关键词: Aquaculture;Carrying capacity;China;Detritus;Ecopath;Energy flow
期刊名称:ECOLOGICAL MODELLING ( 影响因子:2.974; 五年影响因子:3.264 )
ISSN:
年卷期:
页码:
收录情况: SCI
摘要: A trophic model of an intertidal mangrove-based polyculture system in Pearl River Delta, China, was constructed using the Ecopath with Ecosim software. This polyculture system was chosen since it is the first integrated multi-trophic aquaculture (IMTA) system that was constructed on the basis of mangrove planting in China. The energy flows, ecosystem property, and carrying capacity of tilapia in the polyculture system were analyzed and evaluated. The results show the trophic level of 1.00 for primary producers and detritus to 2.85 for grass carp. The geometric mean of the trophic transfer efficiencies was 7.0%, with 7.2% from detritus and 6.8% from primary producers within the system. The ecosystem property indices show that this polyculture system has a high value of total primary production/total respiration (TPP/TR) and total primary production/total biomass (TPP/TB), together with low Finn's cycled index (FCI), Finn's mean path length (FML), and connectance index (CI), indicating that this system is at a development stage according to Odum's theory. The principal fish cultured in the system is tilapia, and mixed trophic impacts (MTI) show that tilapia has a marked impact on most compartments in this system, and the carrying capacity was found to be a tilapia culture biomass of 5.8tha-1 in the system.
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