echogram

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echogram

[′ek·ō‚gram]
(engineering)
The graphic presentation of echo soundings recorded as a continuous profile of the sea bottom.
(medicine)
The pictorial display of anatomical structures using pulse-echo techniques.
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References in periodicals archive ?
Maximum sampling depth was determined from the echograms and monitored as for the midwater trawl.
Echograms that represented Arctic cod schools as "hollow" masses revealed that acoustic shading was prevalent in our data (see Discussion).
Although the tow-yo sampling pattern mixed the catch across the depth ranges sampled, the samples reflected the zooplankton that occurred where the fish were because sampling was limited to depths where most fish echoes occurred on the echograms.
When compared with records from all other areas examined, the echograms from MIC were also uncharacteristically devoid of echoes typical of those from zooplankton-sized organisms, reinforcing the netting results.
Detailed examination of the echogram measurements quantified the amount of collinearity, revealed the lack of standardization (subtraction of mean, division by standard deviation) before principal components analysis (PCA), and showed correlations of individual echogram measurements with depth and seafloor slope.
Therefore we conducted an acoustic analysis on data from a small portion from one survey in order to determine if there was a direct correlation between substrate classes or echogram measurements with species abundance.
This software produces 166 proprietary unitless echogram measurements (EMs) on the first seafloor echo for an internal principal components analysis (PCA), and then uses the first three principal components (PCs), generally accounting for more than 95% of the covariance (Ellingsen et al.