Brain size evolution: how fish pay for being smart.
An artificial selection experiment demonstrates that large-brained guppies learn better, but produce less offspring and have smaller guts. A close link between brain size and fertility suggests that energetic trade-offs play an important role in brain size evolution.
Anthropological Institute and Museum, University of Zürich-Irchel, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland. kisler@aim.uzh.ch
Karin
K
Isler
D000818:Animals; D005075:Biological Evolution; D001921:Brain / Q000033:anatomy & histology*; D003071:Cognition / Q000502:physiology*; D005260:Female; D008297:Male; D011036:Poecilia / Q000502:physiology*; D012641:Selection, Genetic