Subset the data | North Temperate Lakes

Please select what columns you would like to include from North Temperate Lakes LTER - Pelagic Prey Whole Lake Density - Sonar Data

Column	Definition	Unit
lakeid	lake name abbreviation
year4	year	nominalYear
sampledate	sample date
mid_sample_time	time at halfway point of sampling
mid_latitude	latitude at halfway point of sampling	degree
mid_longitude	longitude at halfway point of sampling	degree
sv_mean	volume backscatter from recorded echoes integrated over sample volume	decibel
nasc	nautical area scattering coefficient. Calculated as 4pi1852^210^Sv_mean/10mean height	meterSquaredPerNauticalMileSquared
mean_height	mean thickness of the domain sampled	meter
mean_depth	mean depth of the area sampled	meter
number_pings	number of pings recorded for a sampling date	number
species	species sampled
species_ts	estimated mean size of species sampled. This information was derived from single target analysis in each lake	decibel
density	density in number of each species sampled per nautical square mile	numberPerNauticalMileSquared

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National Science Foundation | LTER Network | Center for Limnology

This material is based upon work supported by the National Science Foundation under Cooperative Agreement #DEB-2025982, NTL LTER (ROR: 04gq8q482). Any opinions, findings, conclusions, or recommendations expressed in the material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.