tailieunhanh - Kỹ thuật thiết kế và lắp đặt lồng nuôi

Tham khảo tài liệu 'kỹ thuật thiết kế và lắp đặt lồng nuôi', nông - lâm - ngư, ngư nghiệp phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 1 Introduction and History of Cage Culture Chua Thia Eng1 and Elsie Tech2 Partnerships in Environmental Management for the Seas of East Asia PEMSEA DENR Compound Visayas Avenue Quezon City Philippines 2Asian Fisheries Society 25-A Mayaman Street UP Village Quezon City Philippines History of Cage Culture Open sea activities such as cage and pen culture are viewed by many stakeholders in the industry as the aquaculture system of the millennium. Fish production from cages and pens both in freshwater and marine environments contributes significantly to total foodfish produced. Cage culture has made possible the large-scale production of commercial finfish and will probably be the most efficient and economical way of raising fish. Aquaculturists realize the need to limit further conversion of wetlands and mangroves into traditional aquaculture farms. We face a situation where even freshwater ecosystems have reached critical levels with respect to their carrying capacities. The depletion of ocean and coastal fishery resources in some areas has led to the development of marine cage culture. The earliest record of cage culture practices dates back to the late 1800s in Southeast Asia particularly in the freshwater lakes and river systems of Kampuchea Coche 1976 Pantulu 1979 Beveridge 1987 . The fish cultured included snakeheads Channa spp. catfishes Pangasius spp. and gobies Oxycleotris spp. . By 1995 more than 5000 fish farmers were engaged in cage culture in the Mekong river system around Phnom Penh Thana 1995 . There were also reports of similar culture practices in Indonesia in the 1920s and 1940s Hickling 1962 . Marine fish farming in cages traces its beginnings to the 1950s in Japan where fish farming research at the Fisheries Laboratory of the Kinki University led to the commercial culture of the yellowtail Seriola quinqueradiata. Takashima and Arimoto 2000 however traced back a history of 200 years where wooden farm net cages were being operated for anchovies or .