Swimming performance of zebrafish Danio rerio males and females initially reared in four different temperatures was assessed by measuring their relative critical swimming speed after acclimation to a common temperature. Males reared at 31° C achieved higher swimming speeds than females reared at the same temperature. Morphometric measurements indicate differences in body shape between sexes that could account for the difference in swimming speed.
Keywords: Ucrit; body shape; developmental temperature; locomotion; morphometric character; plasticity.
© 2013 The Fisheries Society of the British Isles.