Adaptive Diversity: Hormones and Metabolism in Freshwaters Vincent Laudet  Current Biology  Volume 20, Issue 23, Pages R1016-R1018 (December 2010) DOI: 10.1016/j.cub.2010.10.053 Copyright © 2010 Elsevier Ltd Terms and Conditions

Figure 1 The threespine stickleback (Gasterosteus aculeatus). Pictures of live marine (left) and freshwater (right) specimens (photos courtesy of J. Kitano). Current Biology 2010 20, R1016-R1018DOI: (10.1016/j.cub.2010.10.053) Copyright © 2010 Elsevier Ltd Terms and Conditions

Figure 2 A model for the metabolic adaptation of freshwater sticklebacks. In the freshwater stickleback, an allele leading to reduced TSHβ2 expression level was selected. This is likely to lead to a decrease in T4 and T3 levels and thus a decrease in various parameters directly linked to energy expenditure. Current Biology 2010 20, R1016-R1018DOI: (10.1016/j.cub.2010.10.053) Copyright © 2010 Elsevier Ltd Terms and Conditions