Open Access Research Paper Views (425) Download (14) Estimation of primary production along gradients of the middle course of Imo River in Etche, Nigeria Dike Henry Ogbuagu, Adedolapo Abeke Ayoade Int. J. Biosci.1( 4), 68-73, August 2011. Key: Community respirationEtcheOligotrophicPhytoplanktonPrimary production Details