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Historical Stream Fish Distribution Database for the Conterminous United States (1950-1990): IchthyMaps


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Frimpong, E.A., Huang, J., and Liang, Y., 2015, Historical Stream Fish Distribution Database for the Conterminous United States (1950-1990): IchthyMaps: U.S. Geological Survey data release,


Fish occurrence data to support high-resolution distribution models and test various community and macroecological hypotheses have not been available at the national scale. We present IchthyMaps, a database of high-quality historical fish occurrences covering fishes of the conterminous United States. Designed on the principles of metacommunity ecology, IchthyMaps is a compilation of presence records from atlases up to 1990, at the resolution of the 1:100,000 National Hydrography Database Plus (NHDPlus) inter-confluence stream segment, readily aggregated into hierarchically coarser units (e.g. hydrologic unit code 8-digit and 12-digit watersheds). IchthyMaps contains about 606,550 presence records for 1,038 species and subspecies. These [...]


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“ItchyMapsv1 CSV format”
73.4 MB
“FGDC Metadata”
Original FGDC Metadata

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This database was primarily developed for a project developing species distribution models or habitat suitability models for the conterminous United States. Data in this database also meets the needs of addressing other fundamental or applied issues such as biodiversity conservation, impact of climate change, and non-native fish invasions at multiple scale.

Additional Information


Type Scheme Key
DOI doi:10.5066/F7M32ST8

Citation Extension

typePublication Place
valueReston, VA
citationTypeTabular data with spatial reference

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