US Long-Term Ecological Research Network
Please select what columns you would like to include from North Temperate Lakes LTER - Pelagic Prey Interval 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
spatial_interval number of spatial segment (200m) for which density was computed
layer layer within a given segment for which density was computed
sv_mean the mean backscatter per (dB re 1/m) within the domain decibel
layer_depth_mean mean depth of the layer meter
ping_end ping number at the end of the interval 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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