Topic > World population - 1223

According to the United Nations Population Division, the world population reached 6,500 million in 2005 and will continue to grow by more than 76 million per year, United Nations estimates indicate that by 2050 ce there will be between 7,700 million and 10,600 million, the most probable projection being 9,100 million inhabitants. The availability of arable land and greater efficiency in producing food from the land may reach their limits. Oceanographic conditions, climate and its effect on soil quality and the various human uses to determine cropland will not be able to provide food for the ever-growing human population. On the other hand, it is therefore recognized that marine and freshwater aquatic environments, which cover over 70% of the planet's surface, constitute a reservoir of food substances, of industrial and biomedical importance, and also a source of degradation and dilution of substances of anthropic and industrial origin. waste (Solar, 2002). Statistics from the Food and Agriculture Organization of the United Nations (FAO, 2002) indicate that food production from the aquatic environment is close to 137 million tonnes, of which almost 31% comes from agricultural activities. FAO also estimates that to meet the needs of the human population in 2025, total production would need to increase to 165 million tonnes. This significant increase cannot result from the capture of wild species without causing serious damage to marine ecosystems, lakes and rivers. Consequently, the increase in seafood production must necessarily result from a significant increase in crop efficiency. The world's most populous countries such as China, India and Indonesia, or those that do not have sufficient arable land, such as Japan, turn mainly to aquaculture... half of paper... shellfish cultivation red abalone such as oysters, mussels and mussels, found in over 400 evaluation sites, excluding exempt aquaculture-only patent holders. Despite this large number of schools working for its cultivation, attempts have not been successful, mainly due to the lack of studies regarding its development (Osorio et al., 1979), reproduction (Cancino & Becerra, 1978; Solis & Lozada, 1971), and larval settlement (Ramorino & Campos, 1983), acclimation to culture conditions (Cancino & Becerra, 1978), nutrition, disease control (FIP, 1997) and basic genetic studies (Astete, 1995 ; Martínez-Lage et al., 2002, Martínez-Lage et al., 2005, Mena et al., 2001; Thiriot-Quievreux, 1984 Toro, 1998), which has led to seriously endangering the existence of banks and of natural populations, adding to this the lack of resource management plans. extractive activities.