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.
If you have questions about this module, any of its features or would like to discuss pricing, please contact info@echoview.com.
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.
Notes:
- The term 'school' refers to an 'acoustic school', as an acoustically unresolved, multiple fish or plankton aggregation (Kieser et al. 1993), and is not intended to differentiate between 'schools' and 'shoals' as defined by Pitcher and Parrish (1993).
- The School Detection module will only provide you with 2D school detection. For 3D school detection, you will need The Multibeam School Detection module.
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