Risk and uncertainty associated with returns from investment in aquaculture to be an important constraint on aquaculture investment. Attention is given in this paper to identifying the factors that contribute to risk and uncertainty in aquaculture and methods of specifying the risk and uncertainty involved. It is found that there is limited practical scope for the extension of insurance markets in aquaculture, and most farmers will have to rely on other means to manage risk.

If the aquaculture sector is to maintain its current average growth rate of 8 to 10 percent per year to 2025, the supply of nutrient and feed inputs will have to grow at a similar rate. Feed-fed aquaculture production is largely dependent upon capture fisheries for dietary protein and lipid. Sustainability of the aquaculture sector is likely to be linked with the supply of animal and plant proteins, oils and carbohydrate sources for aquafeeds.

It is an undisputable fact that modern farming of carnivorous fish and shrimp uses more fish as feed than is produced as finfish or shrimps; that is, the ratio between fish used and fish obtained is higher than one. The author shows that industrial fishing for forage species brings about a net contribution of foodfish supplies, without causing a systematic collapse of the exploited forage species.

Aquaculture is today considered the only viable option for meeting the increasing future demand for fish and seafood products. There are concerns that unconstrained sectoral expansion and intensification, coupled with its ecological and social impacts, globalisation and fluctuation of markets and resources, climate change may have undesirable impacts on the resilience of social-ecological systems. Aquaculture makes demands on, but also can provide a range of ecosystem services.

The aquaculture industry globally is characterised by an endemic cyclicity that goes beyond good or bad management and affects good companies and bad. This presentation aims to address the boom and bust phenomenon in the industry by examining some of the solutions that can help smooth out its cyclicity. The role of information gathering, management and analysis for decision making is discussed. The presentation includes a brief review of the global market for aquaculture products.