{"thcode":2,"term":{"code":570,"name":"ichthyology","parent":1268,"scope":"Branch of zoology concerned with the study of fish."},"uf":[],"bt":[{"code":1268,"name":"vertebrate zoology","parent":1339,"scope":"Branch of zoology that deals with animals that have spinal columns."},{"code":1339,"name":"zoology","parent":650,"scope":"Branch of biology that deals with the reproduction, development and growth, anatomy, physiology, and behavior of animals."},{"code":650,"name":"life sciences","parent":1019,"scope":"Branches of science that study living and fossil organisms."},{"code":1019,"name":"sciences","parent":1,"scope":"Major educational fields, fields of study, and professional groupings within USGS."},{"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":185,"name":"commercial fishery resources","parent":391,"scope":"Stocks of fish and other seafood used for marketing purposes."},{"code":387,"name":"fish","parent":1269,"scope":"Cold-blooded aquatic vertebrates with fins for swimming, gills for breathing, and usually scales."},{"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":589,"name":"inland fishery resources","parent":391,"scope":"Stocks of fish available to be taken in lakes, streams, ponds, rivers, and other inland bodies of water."},{"code":705,"name":"marine fishery resources","parent":391,"scope":"The stock of fisheries located in seas and oceans."},{"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."},{"code":968,"name":"recreational fishery resources","parent":391,"scope":"The stock of fish and other seafood resources in areas used for recreational fishing."}]}