The Population Dynamics of the Mudskipper, Periophthalmus barbarus (LINNEAUS 1766) (TELEOSTEI, GOBIIDAE) and the Implication for Conservation and Management in the Mangrove Swamp of Iko River Estuary, Southeastern Nigeria - Abiaobo, N. O.; Udo, M. T. (Recent Advances in Biological Research Vol. 3, 2019)