It has been classed 856 species of the mollusks which belong to 120 families and five classes living in western coast of the Tonkin Gulf. The class Gastropod was the most abundant, with 449 species, the Bivalve with 3...It has been classed 856 species of the mollusks which belong to 120 families and five classes living in western coast of the Tonkin Gulf. The class Gastropod was the most abundant, with 449 species, the Bivalve with 368 species, the Scaphopoda with 10 species, the Cephalopods with 19 species and the Amphineura with eight species. Standing stock was estimated about 366,749 tons, that annually caught 80,000 tons. The causes of the resource depletion were human and natural, but the human factors played a key role. The fundamental orientations for developing the resources include： exploiting during harvest seasons, planning suitable aquaculture, moderate exploitation so the resources can restore themselves, combining exploitation and conservation.展开更多
文摘It has been classed 856 species of the mollusks which belong to 120 families and five classes living in western coast of the Tonkin Gulf. The class Gastropod was the most abundant, with 449 species, the Bivalve with 368 species, the Scaphopoda with 10 species, the Cephalopods with 19 species and the Amphineura with eight species. Standing stock was estimated about 366,749 tons, that annually caught 80,000 tons. The causes of the resource depletion were human and natural, but the human factors played a key role. The fundamental orientations for developing the resources include： exploiting during harvest seasons, planning suitable aquaculture, moderate exploitation so the resources can restore themselves, combining exploitation and conservation.
