General illustration of the optimisation problem, here called entangled optimisation, aimed at achieving different performance measures with partly shared parameters. Two performance measures A and B are considered, in addition to the three parameter dimensions. Parameter x1 is relevant for both performances, whereas x1 and x3 can be changed each only affecting one performance. The white arrow indicates that not both optima can be reached simultaneously. For further explanations, see text.

  Part of: Drack M, Betz O (2022) A technomorphic conceptualisation of biological ‘constructions’ and their evolution. Vertebrate Zoology 72: 839-855.