Figure 1.

The layout of proliferation zones is conserved among teleost fishes. (A) Proliferation zones in the adult zebrafish brain. (B) Phylogenetic tree of gnathostomata, with sagittal views of brains from different teleost species and the identified proliferation zones (Raymond and Easter 1983; Zupanc and Horschke 1995; Ekstrom et al. 2001; Candal et al. 2005; Grandel et al. 2006; Kuroyanagi et al. 2010; Maruska et al. 2012). White brain regions have not been analyzed with regard to adult proliferation. As a comparison, the proliferation zones in the adult brain of the canary and the house mouse are also shown (Kaslin et al. 2008). (Panel A from Grandel et al. 2006; modified, with permission, from the authors.)