66 as appropriate, cooperate to establish subregional or regional fisheries organizations to this end. Article 119 Conservation of the living resources of the high seas 1. In determining the allowable catch and establishing other conservation measures for the living resources in the high seas, States shall: (a) take measures which are designed, on the best scientific evidence available to the States concerned, to maintain or restore populations of harvested species at levels which can produce the maximum sustainable yield, as qualified by relevant environmental and economic factors, including the special requirements of developing States, and taking into account fishing patterns, the interdependence of stocks and any generally recommended international minimum standards, whether subregional, regional or global; (b) take into consideration the effects on species associated with or dependent upon harvested species with a view to maintaining or restoring populations of such associated or dependent species above levels at which their reproduction may become seriously threatened. 2. Available scientific information, catch and fishing effort statistics, and other data relevant to the conservation of fish stocks shall be contributed and exchanged on a regular basis through competent international organizations, whether subregional, regional or global, where appropriate and with participation by all States concerned. 3. States concerned shall ensure that conservation measures and their implementation do not discriminate in form or in fact against the fishermen of any State. Article 120 Marine mammals Article 65 also applies to the conservation and management of marine mammals in the high seas. PART VIII REGIME OF ISLANDS Article 121 Regime of islands 1. An island is a naturally formed area of land, surrounded by water, which is above water at high tide. 2. Except as provided for in paragraph 3, the territorial sea, the contiguous zone, the exclusive economic zone and the continental shelf of an island are determined in accordance with the provisions of this Convention applicable to other land territory. 3. Rocks which cannot sustain human habitation or economic life of their own shall have no exclusive economic zone or continental shelf.