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Form of aquaculture in which members of a fish species such as salmon are held in captivity for the first few years of their lives, released, and then harvested as adults when they return from the ocean to their freshwater birthplace to spawn. See also fish farming.
Form of aquaculture in which fish are cultivated in a controlled pond or other environment and harvested when they reach the desired size. See also fish ranching.
Substance that adds inorganic or organic plant nutrients to soil and improves its ability to grow crops, trees, or other vegetation. See commercial inorganic fertilizer, organic fertilizer.
Confined outdoor or indoor space used to raise hundreds to thousands of domesticated livestock. Compare rangeland.
Widespread malnutrition and starvation in a particular area because of a shortage of food, usually caused by drought, war, flood, earthquake, or other catastrophic events that disrupt food production and distribution.
Catching fish in huge nets that drift in the water.
Depletion of the population of a wild species used as a resource to a level at which it is no longer profitable to harvest the species.
Land that can be cultivated to grow crops.
Growing and harvesting of fish and shellfish for human use in freshwater ponds, irrigation ditches, and lakes, or in cages or fenced-in areas of coastal lagoons and estuaries. See fish farming, fish ranching.
Plant that grows, sets seed, and dies in one growing season. Compare perennial.
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