NOAA Technical Memorandum NMFS - Southwest Fisheries ...

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LIST OF TABLES Table 1. Acoustics personnel and affiliation for all surveys . . . . . . . . . . . . . . . . . . . . 22 Table 2. Hydrophone array characteristics and dates used. . . . . . . . . . . . . . . . . . . . . . 23 Table 3. Mean acoustic detection distances of dolphin schools stratified by Beaufort sea state for each survey . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Table 4. Number of sperm whales detected by acoustic methods, visual methods, and both methods during each survey . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Table 5. Summary statistics for acoustic detection distance for sperm whale detections for each cruise, and for the total of the combined surveys . . . . . . . . . . . . . . . . . . . . . 25 Table 6. Number of minke whales detected by acoustic methods, visual methods, and both methods during each survey . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Table 7. Summary statistics for the acoustic detection distance for minke whale detections for each cruise, and for the total of the combined surveys. . . . . . . . . . . . . . 25 Table 8. Acoustic detection distances for combined dolphin schools. . . . . . . . . . . . . . 26 Table 9. Number of sightings and the presence of vocalizations for each species/stock for the combined research surveys. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 Table 10. Mean acoustic detection distances for single species dolphin schools for the combined research surveys. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 Table 11. Call types detected from dolphin schools for each species. . . . . . . . . . . . . . 29 Table 12. Mean group size for dolphin schools detected by visual methods . . . . . . . . 30 Table 13. Number of sonobuoys deployed during each survey by species . . . . . . . . . . 31 ii
LIST OF FIGURES Figure 1. Map of study area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 Figure 2. Diagrams of a) sonobuoy, b) towed hydrophone array and c) bow-mounted hydrophone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 Figure 3. Hardware wiring diagram for shipboard routing and processing of acoustic signals from the towed hydrophone array . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 Figure 4. System frequency response for signals that pass through the Mackie CR1604- VLZ mixer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 Figure 5. Whaltrak plot of beamform angles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 Figure 6. Regression plot of average acoustic detection distance for each survey by to Beaufort Sea State. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 Figure 7. Regression plot of average acoustic detection distance by Beaufort Sea State for ORCAWALE 2001 and STAR 2003 surveys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 Figure 8. Regression plot of original angle vs. original distance (nmi) for all acoustic detections from the combined surveys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 Figure 9. Number of acoustic detections within a given range of original angles for the combined surveys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 Figure 10. Regression plot of acoustic detection distance (nmi) of dolphin schools vs. sea surface temperature for the STAR 00 surveys . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . 37 Figure 11. Regression plot of acoustic detection distance (nmi) of dolphin schools vs. thermocline strength for the STAR 00 surveys . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . 37 Figure 12. Regression plot of acoustic detection distance (nmi) of dolphin schools vs. depth of the thermocline depth for the STAR 00 survey. . . . . . . . . . . . . . . . . . . . . . . . 38 Figure 13. Map of sperm whale, Physeter macrocephalus, detections. . . . . . . . . . . . 38 Figure 14. Map of minke whale, Balaenoptera acutorostrata, detections. . . . . . . . . . 39 Figure 15. Distribution of dolphin detections according to detection method for each research survey . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 Figure 16. The number of dolphin schools detected by combined visual and acoustic methods and by acoustic methods (only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 iii
Page 1 and 2: U N I R A P E D T T E M D S E N TA
Page 3: C O L A N IO T A N U N C I EA .S. D
Page 8 and 9: LIST OF FIGURES, con’t Figure 17.
Page 11 and 12: ACOUSTIC STUDIES OF MARINE MAMMALS
Page 13 and 14: transit to and from San Diego, Cali
Page 15 and 16: VHF radio and received using a modi
Page 17 and 18: acoustic detection distance of sper
Page 19 and 20: significantly larger than the mean
Page 21 and 22: vocalizations detected by the acous
Page 23 and 24: were less likely to be detected by
Page 25 and 26: pilot whale (n = 4), common bottlen
Page 27 and 28: species over long ranges, at night,
Page 29 and 30: VII. LITERATURE CITED Au, D., and W
Page 31 and 32: detection and satellite-tracking le
Page 33 and 34: Table 2. Hydrophone array character
Page 35 and 36: Table 5. Summary statistics for aco
Page 37 and 38: Table 9. Number of sightings and th
Page 39 and 40: Table 11. Number of schools from wh
Page 41 and 42: Table 13. Number of sonobuoys deplo
Page 43 and 44: M icrophone Hydrophones 1 2 3 4 5 6
Page 45 and 46: Figure 6. Regression plot of the ac
Page 47 and 48: Figure 10. Regression plot of the a
Page 49 and 50: Figure 14. Map of study area and mi
Page 51 and 52: Figure 18. Map of study area and fa
Page 53 and 54: Figure 22. Map of study area and Fr
Page 55 and 56: Figure 26. Map of study area and bo
Page 57 and 58:
Figure 30. Map of study area and pi
Page 59 and 60:
Figure 34. Map of study area and no
Page 61 and 62:
Figure 38. Regression plot of the r
Page 63 and 64:
VIII. APPENDICES A. Publications Ap
Page 65 and 66:
Oswald, J. N. 2006. An examination
Page 67 and 68:
Ocean and the Mediterranean Sea. Se
Page 69:
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