School Detection module

The School Detection module allows you to detect and analyze fish schools (shoals or aggregations) in single and split beam data.

Main module uses and outcomes:

  • Studies of school distribution and schooling behavior facilitated by the automated ability to detect schools in acoustic data can be used to examine schools at a high level of temporal and spatial resolution inherent to acoustic data.
  • Investigations into acoustic identification of schools to species, which substantially increases the accuracy of the process of partitioning measurements of back-scattered energy among species. This constitutes an important improvement over species-allocation based solely on trawling and/or visual scrutiny, and ultimately allows fishers to capture only schools of target species, thus allowing limited by-catch in the fishery.

The detection and integration of individual schools allows school-by-school estimates of biomass, which represents an improvement over estimates based on mean biomass per EDSU.

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School detection and region classification

Figure 1. Sv echogram in AutoOpen.EV. Run a school detection then apply region classification rules and use onscreen integration analysis.

Specific features

  • Calculation of morphometric and density parameters of detected fish schools and manually defined regions.
  • Analysis of detected schools yields extensive parameter sets that can used as features for the purpose of classifying schools by species and length.
  • Detection can be applied when live-viewing data or at the post-processing stage. Region classification with rules can be applied following school detection.


See also

Using the School Detection module
About detecting schools

Schools analysis variables

About Echoview modules

School Detection module references

Licenses and demonstration mode

Operator licensing in Echoview
Multibeam School Detection module