Final Technical Report: - Southwest Fisheries Science Center - NOAA

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Table 14. Starting and final AIC values for models of the number of sightings of each species built using oceanographic, net-tow, acoustic backscatter, or a combination of all data. ETP CCE Starting AIC value Oceanographic data 68 Net-tow data Acoustic backscatter data Combined data Striped dolphin 306.93 230.94 253.62 245.67 216.45 Short-beaked common dolphin Eastern spinner dolphin 245.77 155.52 197.42 197.42 155.52 207.36 152.79 207.21 207.21 144.15 Bryde's Whale 132.13 74.23 107.81 107.81 73.23 Striped dolphin 90.09 64.21 63.50 75.68 45.15 Short-beaked common dolphin 245.88 188.33 245.88 221.78 188.33 Dall's porpoise 370.30 146.14 173.55 187.26 99.79 Blue whale 92.31 74.95 78.79 87.66 66.35 Table 15. The explained deviance for the models of the number of sightings of each species built using oceanographic, net-tow, acoustic backscatter, or a combination of all data. ETP CCE Oceanographic data Net-tow data Acoustic backscatter data Combined data Striped dolphin 0.35 0.24 0.29 0.48 Short-beaked common dolphin Eastern spinner dolphin 0.46 0.21 0.21 0.46 0.33 0.02 0.02 0.40 Bryde's Whale 0.56 0.24 0.24 0.59 Striped dolphin 0.37 0.44 0.25 0.60 Short-beaked common dolphin 0.37 0.00 0.21 0.37 Dall's porpoise 0.76 0.67 0.53 0.83 Blue whale 0.25 0.27 0.08 0.39
Table 16. Ratios of observed to predicted number of sightings in the ETP (SE = Standard Error). Predictions were made using models in which habitat was defined using oceanographic, net-tow, acoustic backscatter, or a combination of all data. Oceanographic data Net-tow data 69 Acoustic backscatter data Combined data Striped dolphin 2003 0.656 0.603 0.655 0.682 2006 1.518 1.746 1.521 1.435 All 1.000 0.999 1.000 1.000 SE 0.431 0.571 0.433 0.376 Short-beaked common dolphin 2003 0.796 0.664 0.664 0.796 2006 1.249 1.646 1.646 1.249 All 1.000 0.999 0.999 1.000 SE 0.227 0.491 0.491 0.227 Eastern spinner dolphin 2003 0.941 0.871 0.871 1.025 2006 1.085 1.225 1.225 0.971 All 1.000 1.000 1.000 1.000 SE 0.072 0.177 0.177 0.027 Bryde's Whale 2003 1.126 1.507 1.507 1.126 2006 0.263 0.106 0.106 0.263 All 1.000 0.999 0.999 1.000 SE 0.432 0.700 0.700 0.431 The combined model gave the best fit for striped dolphins in both ecosystems, for eastern spinner dolphins in the ETP and for Dall’s porpoises in the CCE (Tables 14 and 15). For these species, predictive power was also highest for the combined model (Tables 16 and 17). Maps of the predicted number of sightings (Fig. 22 and 23) suggest that the combined model did a better job at capturing gaps in species distributions. For striped dolphin in both ecosystems and for eastern spinner dolphin, all oceanographic variables were retained in the combined model. Dall’s porpoise retained all oceanographic variables except chlorophyll, which had a relatively weak effect in the oceanographic model. These results suggest that the net-tow and acoustic backscatter data provide information about the distribution of these species that is not captured by the oceanographic variables.
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U N I R A P E D T T E M D S E N TA
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C O L A N IO T A N U N C I EA .S. D
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This report was prepared under cont
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Table of Contents Acronyms and Abbr
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C.1 Journal Publications ..........
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Figure 18. Encounter rate models bu
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List of Tables Table 1. Summary of
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Appendix B, Table B-6. Summary of m
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Acknowledgements This project was f
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of these choices as possible and us
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Although our models include most of
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2.0 Background The Navy and other m
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comparison is based on a separate s
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Figure 1. Transects (green lines) s
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used to evaluate the ability of sum
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3.1.5 Mid-trophic Sampling with Net
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variable. Interpolated maps of the
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Table 2. Variogram model results. A
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“number of individuals” as the
Page 40 and 41: Encounter Rate and Group Size Model
Page 42 and 43: were built separately for each of t
Page 44 and 45: Expanding models to the entire U.S.
Page 46 and 47: Table 4. Summary of the weighted ef
Page 48 and 49: Consistent with Barlow and Forney (
Page 50 and 51: incorporation of geographic coordin
Page 52 and 53: overwhelming majority of “Bryde
Page 54 and 55: the genera Ziphius and Mesoplodon.
Page 56 and 57: Table 7. Geographically stratified
Page 58 and 59: above, and the data themselves, are
Page 60 and 61: (hereafter “summer”). SWFSC has
Page 62 and 63: avoid these problems, we decided to
Page 64 and 65: Figure 9. Thermocline depth (m) obs
Page 66 and 67: Attempts to adjust search parameter
Page 68 and 69: CAMMS 1991 PODS 1993 ORCAWALE 1996
Page 70 and 71: 4.2 Modeling Framework : GLM and GA
Page 72 and 73: 4.2.4 Conclusions Regardings Modeli
Page 74 and 75: Table 10 cont. Comparison of the si
Page 76 and 77: Table 11 cont. Comparison of the si
Page 78 and 79: Figure 15. The transect lines used
Page 80 and 81: A) Striped dolphin 10 km B) Short-b
Page 82 and 83: dependent. For example, the number
Page 84 and 85: Figure 19. Predicted average densit
Page 86 and 87: ecosystem, eastern spinner dolphins
Page 88 and 89: Table 13. Variables selected for mo
Page 92 and 93: Table 17. Ratios of observed to pre
Page 94 and 95: species represented in the acoustic
Page 96 and 97: 0.29 (Risso’s dolphin) to 3.20 (n
Page 98 and 99: Figure 25. Sample 2005 validation p
Page 100 and 101: Table 18. (continued) 1991 1993 Nor
Page 102 and 103: Blue whales had the greatest deviat
Page 104 and 105: Table 20. Abundance (number of anim
Page 106 and 107: Table 22. Proportion of deviance ex
Page 108 and 109: Figure 27. Average density (AveDens
Page 110 and 111: Table 23. Effective degrees of free
Page 112 and 113: We attempted to build encounter rat
Page 114 and 115: 5.0 Conclusion The field of predict
Page 116 and 117: 6.0 Transition Plan The models of c
Page 118 and 119: needed to ensure that the SDSS rema
Page 120 and 121: Administrative Report LJ-07-02. NOA
Page 122 and 123: Forney KA, Barlow J (1993) Prelimin
Page 124 and 125: Redfern JV, Barlow J, Ballance LT,
Page 126 and 127: Appendix A: Detailed Model Results
Page 128 and 129: Table A-1 (continued) Blue whale 19
Page 130 and 131: Figure A-1a. Striped dolphin 108
Page 132 and 133: Figure A-1c. Risso’s dolphin 110
Page 134 and 135: Figure A-1e. Northern right whale d
Page 136 and 137: Figure A-1g. Sperm whale 114
Page 138 and 139: Figure A-1i. Blue whale 116
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Figure A-1k. Baird’s beaked whale
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Figure A-2. Predicted average densi
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Figure A-2b. Short-beaked common do
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Figure A-2d. Pacific white-sided do
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Figure A-2f. Dall’s porpoise 126
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Figure A-2h. Fin whale 128
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Figure A-2j. Humpback whale 130
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Figure A-2l. Small beaked whales 13
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Table B-2. Summary of model validat
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Table B-10. Summary of model valida
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Figure B-1. Predicted yearly and av
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Figure B-1. b) Eastern spinner dolp
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Figure B-1. c) Whitebelly spinner d
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Figure B-1. d) Striped dolphin 168
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Figure B-1. e) Rough-toothed dolphi
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Figure B-1. f) Short-beaked common
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Figure B-1. g) Bottlenose dolphin 1
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Figure B-1. h) Risso’s dolphin 17
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Figure B-1. i) Cuvier’s beaked wh
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Figure B-1. j) Blue whale 180
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Figure B-1. k) Bryde’s whale 182
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Figure B-1. l) Short-finned pilot w
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Figure B-1. m) Dwarf sperm whale 18
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Figure B-1. n) Mesoplodon beaked wh
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Figure B-1. o) Small beaked whales
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Figure B-2. Predicted average densi
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Figure B-2. (cont.) c) Whitebelly s
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Figure B-2. (cont.) g) Bottlenose d
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Figure B-2. (cont.) k) Bryde’s wh
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Figure B-2. (cont.) o) Small beaked
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Ferguson MC (2005) Cetacean Populat
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Barlow J, Kahru M, Mitchell BG (In
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Memorandum NMFS-SWFSC-374, U.S. Dep
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