affiliation not provided to SSRN, University of Pretoria, Nelson Mandela University, Nelson Mandela University, Nelson Mandela University, affiliation not provided to SSRN, Nelson Mandela University and affiliation not provided to SSRN

Nelson Mandela University, Nelson Mandela University, Edith Cowan University, Ghana Atomic Energy Commission, Red Sea University, Red Sea University, affiliation not provided to SSRN, National Center for Energy Sciences and Nuclear Techniques, affiliation not provided to SSRN, University of Seychelles, National Research Foundation - South African Environmental Observation Network, Kenya Marine and Fisheries Research Institute, University of Dar es Salaam, Nelson Mandela University, National Center for Energy Sciences and Nuclear Techniques, National Research Foundation - South African Environmental Observation Network, Kenya Marine and Fisheries Research Institute, affiliation not provided to SSRN, University of Kara, affiliation not provided to SSRN, affiliation not provided to SSRN and Federal University of Bahia (UFBA)