Density-dependent changes in the feeding behaviour of Macrodon atricauda of southern Brazil.

Long-term density-dependent changes in the population dynamics of the king weakfish Macrodon atricauda of southern Brazil between 1976 and 2013 may be related to a change in diet and an increase in feeding intensity. The importance of the small crustacean, Artemesia longinaris, increased in the diet of adults, whereas the importance of teleosts decreased and the frequency of full stomachs increased. Macrodon atricauda currently benefits from a high availability of A. longinaris, which results in a higher energy intake per individual, which, in turn, induces faster body growth and an earlier onset of sexual maturation.