Lemon sharks Negaprion brevirostris were sampled in the Atol das Rocas, a nursery area, on nine occasions from March 1999 to October 2003, during which 157 individuals were tagged and 35 were recaptured. The male : female sex ratio of captured individuals was 1 : 1·12. Mean ± s . d . growth rates were 24·7 ± 3·4 cm year −1 in total length ( L T ), 20·7 ± 3·2 cm year −1 in fork length, and 19·5 ± 2·7 cm year −1 in precaudal len...