As re q u i red accord i n g to ••Sch e du 1 e M to the Gener a 1 Regulations••, and ••Rules relating to the Submission of Dissertations and Theses for Higher Degrees••, (Pages 45-46, Postgraduate Prospectus and Student Handbook 1982, Section Ph.D.12).I hereby declare and state that no part of the mat~rtal . contained in my thesis entitled .. Phytoplankton Ecology and Production of the Red Sea off Jiddah, Saudi Arabia .. , which I have submitted to The Open University in partial fulfilment of the Ph.D. degree, has been submitted by me to this or any other University for any degree. In addition, no part of this thesis has been, or will be submitted by any other candidate to any other University for any degree. I further declare that none of the material contained in my thesis is yet published, but that preparations for . publication are being made.