The CBD Ad Hoc Technical Expert Group (AHTEG) on Indicators considered that in addition to the established ‘Marine Trophic Index’, other indicators of ecosystem integrity for freshwater and terrestrial ecosystems would be policy relevant. The trophic index is produced from a calculation of  the abundance of species at different trophic levels in ‘food web’, from plants to herbivores, carnivores and decomposers. The trophic index is a measure of ecosystem integrity since commercial exploitation of species often starts with the most valuable, long-lived individuals which are often carnivores, and then harvests species lower and lower in the food web. However, data are inadequate as yet to apply the trophic index to inland water fisheries. No agreed methodology is available to apply the concept of measuring the consequences of selective harvesting of the most valuable, long-lived individuals to terrestrial ecosystems, although data may be available. An equivalent indicator for terrestrial systems would likely be based on body-size and life-span.