Green supply-chain management is a novel idea that incorporates the concept of environmental protection into traditional supply-chain management in order to reduce environmental risks and impact. This study developed criteria for evaluating green suppliers on the basis of the green supply chain. The Decision-Making Trial and Evaluation Laboratory (DEMATEL) method was adopted to investigate the criteria for evaluating green suppliers, to explore inter criterion causal relationships and levels of mutual influence, and finally to discuss the mechanism for evaluating green suppliers, as well as the methods for selecting them.

Groen voorsieningskettingbestuur is 'n nuwe idee wat die konsep van omgewingsbeskerming tot tradisionele voorsieningskettingbestuur byvoeg om sodoende die omgewingsrisiko's en -impak verminder. Dié studie het 'n kriteria vir die beoordeling van groen verskaffers op grond van die groen voorsieningsketting ontwikkel. Die "Decision-Making Trial and Evaluation Laboratory" (DEMATEL) metode is aangepas om die kriteria vir die beoordeling van groen verskaffers te ondersoek, om die onderlinge maatstaf oorsaaklike verhoudings en vlakke van wedersydse invloed te ondersoek en om die meganisme vir die beoordeling van groen verskaffers en die metodes om hulle te kies, word bespreek.

Cryopreservation is a long-term storage technique to preserve the biological material without deterioration for extended period of time at least several thousands of years. The ability to preserve and store both maternal and paternal gametes provides a reliable source of fish genetic material for scientific and aquaculture purposes as well as for conservation of biodiversity. Successful cryopreservation of fish sperm have been achieved for more than 200 fish species and many fish species have been adequated for the purpose of cryobanking. Cryopreservation of fish embryo is not viable, mainly because of the same limitations as in fish oocytes, i.e., high chilling sensitivity and low membrane permeability. However, cryopreservation of isolated embryonic cells is another option for preserving both maternal and paternal genome. In this paper, an overview of the current state of aquatic species is followed by a discussion on the sperm, embryos, oocytes and embryonic cells - blastomeres.