Figure 20. Based on scientific literature, and the stewardship experiences of Sissenwine and Mace (2003), an ecosystem approach to a responsible fisheries management system ought to encompass the listed parameters. An ecosystem approach also needs to take into account environmental variability upon fisheries resources. Six of the seven parameters of the fisheries ecosystem management system are also employed for single-species fisheries management (Sissenwine and Mace, 2003). It should not be a surprise, in the similarity between single-species fisheries management and ecosystem approaches.