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The significance of photoperiodicity, water temperature and an inherent endogenous rhythm for the production of viable eggs by the African catfish, Clarias gariepinus, kept in subt...

Richter, C.J.J., Viveen, W.J.A.R., Eding, E.H., Sukkel, M., Rothuis, A.J., Hoof, M.F.P.M. van, Berg, F.G.J. van den, Oordt, P.G.W.J. van
1987