Enforcement of fishery agreements , where they do exist , for commercial fisheries has been confounded by the wide and patchy distribution of such fishery resources , and the obsolete belief that marine resources are inexhaustible 由于該等漁業(yè)資源的分布范圍廣泛而不平均,加上人們?nèi)杂泻Q筚Y源取之不竭的過時觀念,故此執(zhí)行商業(yè)性捕魚的管制協(xié)議往往困難重重。