Consecutive acoustic observations of an Atlantic herring school in the Northwest Atlantic

Several successive images of the same school of Atlantic herring (Clupea harengus) were collected over the course of 1 h just north of Georges Bank in the Northwest Atlantic. Although the fish may not have been in their natural, undisturbed state, we observed what appeared to be the fish school fragmenting and dispersing, using a split-beam and a multibeam echosounder. Calibrated, 38 kHz, splitbeam echosounder (Simrad EK60) and trawl-catch data provided accurate measures of the fish density beneath the vessel. Uncalibrated, 400 kHz, multibeam-echosounder (Reson 7125) data provided synoptic observations of the fish school including estimates of the school volume, morphology, and behaviour. Observations of the angular dependence in the multibeam-echosounder measurements of backscatter from fish allow investigation of the efficacy of extrapolating fish-school densities measured by the split-beam echosounder to the entire school.

[1]  K. Foote.  Calibration of acoustic instruments for fish density estimation : a practical guide , 1987 .

[2]  Pierre Fréon,et al.  Dynamics of pelagic fish distribution and behaviour : effects on fisheries and stock assessment , 1999 .

[3]  Timothy K Stanton,et al.  Submitted to : Journal of the Acoustical Society of America Broadband acoustic backscatter and high-resolution morphology of fish : Measurement and modeling , 2022 .

[4]  N. Cochrane,et al.  Quantification of a multibeam sonar for fisheries assessment applications. , 2003, The Journal of the Acoustical Society of America.

[5]  E. John Simmonds,et al.  Fisheries Acoustics: Theory and Practice , 2005 .

[6]  Pierre Fréon,et al.  From two dimensions to three: the use of multibeam sonar for a new approach in fisheries acoustics , 1999 .

[7]  J. Jech,et al.  A multifrequency method to classify and evaluate fisheries acoustics data , 2006 .

[8]  Laurent Berger,et al.  The new fisheries multibeam echosounder ME70: description and expected contribution to fisheries research , 2008 .

[9]  C. D. de Moustier,et al.  Multibeam volume acoustic backscatter imagery and reverberation measurements in the northeastern Gulf of Mexico. , 2002, The Journal of the Acoustical Society of America.

[10]  K. Foote.  Fish target strengths for use in echo integrator surveys , 1987 .

[11]  Ole Arve Misund,et al.  Dynamics of moving masses: variability in packing density, shape, and size among herring, sprat, and saithe schools , 1993 .

[12]  George R. Cutter,et al.  Accounting for scattering directivity and fish behaviour in multibeam-echosounder surveys , 2007 .

[13]  Noël Diner,et al.  Correction on school geometry and density: approach based on acoustic image simulation , 2001 .

[14]  John K. Horne,et al.  Visualizing fish movement, behavior, and acoustic backscatter , 2003 .

[15]  Deanelle T. Symonds,et al.  Fish Population and Behavior Revealed by Instantaneous Continental Shelf-Scale Imaging , 2006, Science.

[16]  Gary D. Melvin,et al.  Extraction and comparison of acoustic backscatter from a calibrated multi- and single-beam sonar , 2003 .

[17]  J. Magnuson,et al.  Characterization of Patches Along Transects Using High-Resolution 70-kHz Integrated Acoustic Data , 1989 .

[18]  Dezhang Chu,et al.  Protocols for calibrating multibeam sonar. , 2003, The Journal of the Acoustical Society of America.

[19]  R. Korneliussen,et al.  THE LARGE SCALE SURVEY SYSTEM-LSSS , 2006 .

[20]  François Gerlotto,et al.  The three-dimensional morphology and internal structure of clupeid schools as observed using vertical scanning multibeam sonar , 2003 .

[21]  J. Jech,et al.  Three-dimensional visualization of fish morphometry and acoustic backscatter , 2002 .

[22]  P. Brehmer,et al.  Fisheries Acoustics: Theory and Practice, 2nd edn , 2006 .

[23]  Christophe Collet,et al.  Omnidirectional multibeam sonar monitoring: applications in fisheries science , 2006 .