Benefits from horizontal beaming during acoustic survey: Application to three Norwegian lakes

Fisheries Research

Volumn 56, Issue 2, 2002, Pages 205-211

  Knudsen, Frank Reier ^a   Sægrov, Harald ^b  

^a Simrad AS   (Norway)

^b Rådgivende Biologer A S   (Norway)

Author keywords

Echosounder; Fish counting; Horizontal and vertical hydroacoustics; Lakes

Indexed keywords

ABUNDANCE ESTIMATION; ACOUSTIC SURVEY; ICHTHYOFAUNA; LAKE;

NORWAY;

EID: 0036236481     PISSN: 01657836     EISSN: None     Source Type: Journal    
DOI: 10.1016/S0165-7836(01)00318-6     Document Type: Article

References (24)

1. Random errors of acoustic fish abundance estimates in relation to the survey grid density applied
2. Bias in hydroacoustic estimates of fish abundance due to acoustics shadowing: Evidence form day-night surveys of vertically migrating fish
3. Comparison of pelagic vendace (Coregonus albula) stock density estimation methods in a lake
4. Fish size distribution and total fish biomass estimated by hydroacoustic methods: A statistical approach
5. The estimation of pelagic fish density, single fish and biomass of arctic charr (Salvelinus alpinus) by echosounding
6. Measurement of fish target strength and associated directivity at high frequencies
7. Experiences with multibeam sonar in shallow tropical waters
8. From two dimensions to three: The use of multibeam sonar for a new approach in fisheries acoustics
9. The application of multibeam sonar technology for quantitative estimates of fish density in shallow water acoustic surveys
10. Acoustic size vs. real size relationships for common species riverine fish
11. Horizontal beaming as a crucial component of acoustic fish stock assessment in freshwater lakes
12. Echo counting or echo integration for fish biomass assessment in shallow waters
13. Brown trout populations of three Scottish lochs estimated by horizontal sonar and multimesh gill nest
14. Longitudinal hydroacoustic survey of fish in the Elbe River
15. Resource partitioning and niche shift in Arctic chart Salvelinus alpinus and brown trout Salmo trutta
16. Ekkoloddregistreringer av pelagiske fiskebestander i innsjøer
17. Monitoring pelagic whitefish (Coregonus lavaretus) and vendace (Coregonus albula) in a hydroelectric reservoir using hydroacoustics
18. Target strength of individual fish at any aspect
19. Acoustic stock assessment
20. Applications of a hydroacoustic sampling technique in a large wind-exposed shallow lake
21. Observed avoidance behaviour in herring in relation to passage of an echo survey vessel
22. Physiological factors causing natural variations in acoustic target strength of fish
23. Detection of migrating fish in the Fraser River using 100-kHz side can sonars
24. Comparison of horizontal acoustic survey and purse-seine estimates of salmonid densities and sizes in eleven Wyoming waters