{"thcode":2,"term":{"code":744,"name":"migratory species","parent":841,"scope":"Species that have a pattern of moving from one geographical area to another, primarily according to the seasons, and usually traveling long distances along established routes."},"uf":[{"name":"anadromous fish","usewith":{"code":387,"name":"fish","parent":1269,"scope":"Cold-blooded aquatic vertebrates with fins for swimming, gills for breathing, and usually scales."}},{"name":"diadromous fish","usewith":{"code":387,"name":"fish","parent":1269,"scope":"Cold-blooded aquatic vertebrates with fins for swimming, gills for breathing, and usually scales."}}],"bt":[{"code":841,"name":"organism groupings (non-taxonomic)","parent":1174,"scope":"Used for categories of living organisms that are not taxonomic and that include species from more than one taxonomic group."},{"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":40,"name":"animal behavior","parent":921,"scope":"The way animals act or react to conditions in the environment and to other organisms, including life patterns such as migration, hibernation, and nocturnal living."},{"code":53,"name":"aquatic biology","parent":650,"scope":"The scientific study of organisms living in or near water.  This term is to be used for the science of 'aquatic biology' and for  biological studies in fresh and brackish water. For marine biological studies, use 'marine biology'."},{"code":96,"name":"biogeography","parent":921,"scope":"The study of the geographic distributions of plants and animals."},{"code":311,"name":"ecology","parent":650,"scope":"Study of the relations between living plants and animals and their environment."},{"code":702,"name":"marine biology","parent":650,"scope":"Branch of biology concerned with the organisms and habitats of the seas and oceans."},{"code":743,"name":"migration (organisms)","parent":310,"scope":"The movement of animals, often periodical, from one area to another due to seasonal changes, availability of food, or climatic conditions."},{"code":1339,"name":"zoology","parent":650,"scope":"Branch of biology that deals with the reproduction, development and growth, anatomy, physiology, and behavior of animals."}]}