{"thcode":2,"term":{"code":379,"name":"field sampling","parent":376,"scope":"Collecting pieces or specimens or making measurements or observations at determined intervals or areas.  Results may be used as representative of the whole research area or population."},"uf":[{"name":"fish inventories","usewith":{"code":387,"name":"fish","parent":1269,"scope":"Cold-blooded aquatic vertebrates with fins for swimming, gills for breathing, and usually scales."}}],"bt":[{"code":376,"name":"field methods","parent":734,"scope":"Research procedures and instrumental means to measure, collect data and samples, and observe in the natural areas where the materials, phenomena, structures, or species being studied occur."},{"code":734,"name":"methods","parent":1,"scope":"Techniques, methods, procedures, or strategies for research, management, collection, or analysis of scientific information in 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":[{"code":44,"name":"animal tracking","parent":379,"scope":"Method of studying wildlife by following physical materials (spoor, footprints, droppings, scent) or remote monitoring of individuals or populations in an area to document the presence and movements of the animals and their interactions within the landscape."},{"code":140,"name":"capturing (animals)","parent":379,"scope":"Collecting individual animals in the field by various methods in order to obtain information about the species or population and its ecology. Capturing methods are adapted to the habits and habitats of the target species and include both live trapping and kill trapping methods."},{"code":2032,"name":"dredge sampling","parent":379,"scope":"Collection of material from the bottom of a body of water by dragging an open container along the floor of the water body and returning the collected material to the investigators."},{"code":281,"name":"drilling and coring","parent":379,"scope":"Cutting into the subsurface, for example into underground strata, ice, or a tree trunk, to remove material for examination. Intended for broad use wherever coring is done. The combination of this term with other terms will convey the context of the activity."},{"code":2067,"name":"grab sampling","parent":379,"scope":"Use of a mechanical device to seize a volume of unconsolidated surficial material for study.  This term applies when the device used is specifically crafted for grab sampling."},{"code":906,"name":"plant and animal tagging","parent":379,"scope":"Methods of attaching a tag or marker to an organism as long-term identification for study purposes."},{"code":911,"name":"plot sampling","parent":379,"scope":"Outlining small areas of land within a larger area to use as samples to study biological populations or ecosystems."},{"code":1054,"name":"sexing (plants & animals)","parent":379,"scope":"Determination of the sex of an individual organism for study purposes, such as wildlife surveys."},{"code":1091,"name":"specimen collecting","parent":379,"scope":"Taking of samples from the environment for study."},{"code":1186,"name":"transect sampling","parent":379,"scope":"Systematic method of collecting field data by recording observations or collecting specimens along a vector or measured course across the environment."},{"code":1189,"name":"trenching","parent":379,"scope":"Field method used by earth scientists to study the underground structure of an area. A long narrow ditch is dug to locate geologic features, such as a fault."},{"code":1309,"name":"water sampling","parent":379,"scope":"Methods of collecting a representative part of a body of water for testing in controlled conditions."}],"rt":[]}