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Lake Ontario April Prey Fish Bottom Trawl Survey, 1978-2022


Publication Date
Start Date
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Weidel, B.C., Holden, J.P., Goretzke, J., Connerton, M., and Gutowsky, L., 2022, Lake Ontario April Prey Fish Bottom Trawl Survey, 1978-2022: U.S. Geological Survey data release,


This data release includes Lake Ontario prey fish data including species captured, relative abundance, spatial distribution, size structure, and age data from the April or spring prey fish bottom trawl survey, 1978 through 2022. Data from 1978 - 2015 are from U.S. waters of Lake Ontario while data from 2016 - 2022 include both U.S. and Canadian waters of Lake Ontario. Details about the vessel and gear descriptions, sampling protocols, and catch processing protocols are provided in the associated metadata. Portions of this data release follows the data model of the USGS Great Lakes Science Center Research Vessel Catalog (RVCAT). The trawl data included in this data release are a subset of the larger RVCAT data base. The RVCAT data can [...]


Point of Contact :
Brian C Weidel
Process Contact :
Brian C Weidel
Originator :
Brian C Weidel, Jeremy P Holden, Jessica Goretzke, Michael Connerton, Lee Gutowsky
Metadata Contact :
Brian C Weidel
Publisher :
U.S. Geological Survey
Distributor :
U.S. Geological Survey - ScienceBase
SDC Data Owner :
Great Lakes Science Center
USGS Mission Area :

Attached Files

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HydroacousticDensity_SpringPreyfishBottomTrawl.csv 1.01 MB text/csv
Reference_LifeStage.csv 575 Bytes text/csv
Reference_Species.csv 2.14 KB text/csv
TrawlAlewifeAge_SpringPreyfishBottomTrawl.csv 1.1 MB text/csv
TrawlCatch_SpringPreyfishBottomTrawl.csv 4.94 MB text/csv
TrawlLengthFrequency_SpringPreyfishBottomTrawl.csv 7.11 MB text/csv
TrawlLengthWeight_SpringPreyfishBottomTrawl.csv 1.75 MB text/csv
MetaDataDictionary_SpringPrefishBottomTrawl_Ontario_20220902.csv 13.07 KB text/csv


These data are intended for use by Lake Ontario fisheries managers, academia, and the public. The data sets are annually reported on to provide relative abundances of prey fishes, to assess the spatial distributions of prey fishes, and determine the population dynamics of Alewife (Alosa psuedoharengus), which are of interest to fisheries managers that decide on Lake Ontario predator stocking levels.

Additional Information


Type Scheme Key
DOI doi:10.5066/P97DZ1AS

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