On the one hand they are responsible for the imbalance seen in some ecosystems, and on the other hand they have been identified as the main cause of the depletion of stocks, some of them with a high commercial value, such as cod.
Jan Marinus WIERSMA (PSE, NL), kura pārstāvētā PSE grupa ir pret sistēmas izvietošanu Eiropā, norādīja — jāraugās, vai sistēma nav pārāk dārga, kā interesēs tā kalpo un — vai tāda vispār nepieciešama.