Abstract: One of the most important mechanisms for the introduction of non-indigenous organisms is transport in ship ballast water. By analyzing the situation of ballast water usage in ship-transport and the negative impacts of introduced marine organisms via ballast water transport on ecosystems ,economic deveopment and public health, comparing with the treatments using and being researched on preventing transport of the non-indigenous invaders, it is found out that there are advantages and prospects of quantitative risk assessment associated with eco-models on treating ballast water introductions. This may give some qualitative and quantitative evaluations on suggestions to the Chinese ballast water managements.

Key words: introduced marine organisms, quantitative risk assessment, eco-model, ballast water, introduced marine organisms, quantitative risk assessment, eco-model