{"thcode":2,"term":{"code":852,"name":"overfishing","parent":548,"scope":"Taking too many fish from an area beyond the capacity for the population to replenish its numbers. The balance of the ecosystem is upset, leading to long-term depletion of fish stock."},"uf":[{"name":"over-fishing","usewith":false}],"bt":[{"code":548,"name":"human impacts","parent":1174,"scope":"The effects, intentional or unintentional, beneficial or harmful, direct or indirect, which human activities have upon the environment and living things."},{"code":1174,"name":"topics","parent":1,"scope":"Themes, subjects, and concerns for which USGS information resources are relevant."},{"code":1,"name":"Categories","parent":null,"scope":"Thematic terms for categorizing information resources.  This thesaurus is intended to support finding and understanding scientific information."}],"nt":[],"rt":[{"code":391,"name":"fishery resources","parent":777,"scope":"The stock of anadromous, marine, and freshwater fish in fishing areas of commercial, subsistence, and recreational value."},{"code":570,"name":"ichthyology","parent":1268,"scope":"Branch of zoology concerned with the study of fish."},{"code":1075,"name":"social sciences","parent":1019,"scope":"Sciences concerned with the structure and interrelationships of human societies, human institutions and organizations, and human culture over time."},{"code":1332,"name":"wildlife biology","parent":1339,"scope":"Branch of biology dealing with living organisms, usually mammals, birds, or fishes, that are not domesticated or dependent on man."}]}