The Tropentag 2011 Thematic Presentations on Animal Production Systems discuss various trade-offs between different animal feeds and feeding practices. The livestock in question ranged from cattle to shrimp and even guinea pigs! Presentations on Animal Production Systems at Tropentag 2011. Transforming to Integrated Ecosystems The common thread through all the presentations was how to integrate livestock production into the natural environment. Sustainable aquaculture that aims at minimizing impact on the environment can in the long run provide farmers with much better livelihoods. We were presented with some great use of Google map imaging depicting the boundaries of land usage and how livestock production can be integrated without degrading the environments around it. A ratio between environmental land coverage and live stock land usage enforces the ongoing theme of 'doing more with less'.