A. Status of the Spectacled Eider - U.S. Fish and Wildlife Service

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LU ~0.8 z -J ~0.6 I-ET1 w107 480 m117 480 lSBT 004 -J ~0.2 0 0 Loss if decision is not to classify Loss if decision is to classify -0.1 -0.05 0 0.05 OA POPULATION GROWTH RATE (r) Figure 11-1. Loss functions for the endangered to threatened and threatened to delisted classification decisions. Notethat the functions are symmetrical around zero. The under-protection loss is symbolized with filled squares and the over-protection loss with open squares. Appendix II- Page 7
Table 1. Calculations for the over- and under-protective losses for the loss functions and trend probability distribution shown in Figure 10 in part II Recovery. The under-protection loss for a single value of r is the probability of r given the data times the value of the loss function. For example, ifr = -0.05 then the loss calculation would be 0.10648 x 0.063 = 0.00671. r . probability of r given data (hypothetical) under-protaction loss function over-protaction loss function under- pro4ection loss -0.105 0.00000 1.0000 0.0000 0.00000 0.00000 -0.100 0.00004 1.0000 0.0000 0.00005 0.00000 -0.095 0.00016 1.0000 0.0000 0.00016 0.00000 -0.090 0.00051 1.0000 0.0000 0.00051 0.00000 -0.085 0.00148 1.0000 0.0000 0.00148 0.00000 -0.080 0.00380 1.0000 0.0000 0.00380 0.00000 -0.075 0.00874 1.0000 0.0000 0.00874 0.00000 -0.070 0.01800 1.0000 0.0000 0.01800 0.00000 .0.065 0.033 16 0.9600 0.0000 0.03 183 0.00000 -0.060 0.05467 0.5990 0.0000 0.03275 0.00000 -0.055 0.08066 0.2360 0.0000 0.01904 0.00000 -0.050 0.10648 0.0630 0.0000 0.00671 0.00000 -0.045 0.12579 0.0070 0.0000 0.00088 0.00000 -0.040 0.13298 0.0000 0.0000 0.00000 0.00000 -0.035 0.12579 0.0000 0.0000 0.00000 0.00000 -0.030 0.10648 0.0000 0.0000 0.00000 0.00000 -0.025 0.08066 0.0000 0.0000 0.00000 0.00000 -0.020 0.05467 0.0000 0.0000 0.00000 0.00000 -0.015 0.033 16 0.0000 0.0000 0.00000 0.00000 -0.010 0.01800 0.0000 0.0000 0.00000 0.00000 -0.005 0.00874 0.0000 0.0070 0.00000 0.00006 0.000 0.00380 0.0000 0.0630 0.00000 0.00024 0.005 0.00148 0.0000 0.2360 0.00000 0.00035 0.010 0.00051 0.0000 0.5990 0.00000 0.00031 0.015 0.00016 0.0000 0.9600 0.00000 0.00015 0.020 0.00004 . 0.0000 .1.0000 0.00000 0.00005 0.025 0.00000 0.0000 1.0000 0.00000 0.00000 SUM 1.00000 0.12394 0.00116 Appendix II- Page 8 over-protection loss
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SPECTACLED EIDER RECOVERY PLAN Team
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LITERATURE CITATION U.S. Fish and W
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EXECUTIVE SUMMARY OF THE RECOVERY P
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TABLE OF CONTENTS DISCLAIMER PAGE 1
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LIST OF FIGURES Figure 1. Breeding
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A. Status of the Spectacled Eider R
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) a) j~ 25000 0 2 220000 C ~15000 ~
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B. Causes for Decline and Obstacles
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Increasing interest in avicultural
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Other conservation measures include
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D. Natural History of the Spectacle
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Figure 4. Yukon-Kuskokwim Delta loc
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DEL?A RUSSIA SPECTACLED EIDER RANGE
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helicopter surveys in the Prudhoe B
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geographic populations, because imm
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Figure 8. Study sites and land stat
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their diseases (e.g., Schiller 1954
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E. Distinct Population Segments The
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A final consideration involves info
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Trend data are analyzed to inform w
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Figure 10. A hypothetical posterior
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thresholds are not “magic numbers
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Criteria for Reclassifying from Thr
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Criteria for Delisting from Threate
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The final aspect ofSpectacled Eider
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concordance in their descriptions o
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data on both levels and effects oft
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implicated. In the absence of histo
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. - currently small size of the YKD
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implementation of the Memoranda ofA
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. take of Spectacled Eiders. In add
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. AlS. Produce a handbook summarizi
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. Bl.4. 1.3. Develop visibility cor
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B2. 1.1. Implement YKD satellite tr
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. Appendix Ill). Since epidermal ag
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. feasible if post-fledging staging
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presumed that their activities have
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contaminants within Spectacled Eide
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limited ability to withstand additi
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surface after a year and is no long
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. The reproductive stages (eggs, yo
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is inadequate to sustain “normal
Page 86 and 87: ___________ 1967. The geese of the
Page 88 and 89: Dementev, G.P., and N.A. Gladkov (e
Page 90 and 91: ___________ 1 964a. Observations on
Page 92 and 93: Nelson, E.W: 1887. Report upon natu
Page 94 and 95: ________ P.R. Wade, R.A. Stehn, and
Page 96 and 97: Robert M. Platte, Migratory Bird Ma
Page 98 and 99: KEY Task Duration and Costs TBD - T
Page 100 and 101: TASK 324.2 I 12.4.1 .2 PRIOR- — 2
Page 102 and 103: TASK I — [37 E12 EI.3 fTYU —PRI
Page 104 and 105: TASK PRIOR- Dj ITYU — — A12.3 2
Page 106 and 107: — TASK U — 135.2 PRIOR- TASK DE
Page 108 and 109: TASK U PRIOR- ITY U TASK DESCRIPTIO
Page 110 and 111: TASK PRIOR. U — DS.3 3 TASK DESCR
Page 112 and 113: The final risk factor is the effect
Page 114 and 115: This PVA will treat two population
Page 116 and 117: Both aerial surveys are conducted a
Page 118 and 119: 0.2 0.15 -j i 4 0.1 0 -I 0.05 0.08
Page 120 and 121: emaining before the population reac
Page 122 and 123: ) critical population size; and (2)
Page 124 and 125: 40%. The population growth rate cri
Page 126 and 127: Table 1-2. Results of simulation wh
Page 128 and 129: Hilborn, R. and C.J. Walters. 1992.
Page 130 and 131: APPENDIX II TECHNICAL DETAILS OF TH
Page 132 and 133: The likelihood function for the par
Page 134 and 135: initial sample. Then the O~ were re
Page 138 and 139: LITERATURE CITED APPENDIX LI De la
Page 140 and 141: where x = age. The fertility rate i
Page 142 and 143: of older females: (1) older females
Page 144 and 145: RESULTS Solutions for single cause
Page 146 and 147: 0.1 0.08 ~0.06 4 0 0.04 0. 0.02 0 0
Page 148 and 149: growth rate. Perhaps this can be mo
Page 150 and 151: decline, by far the fastest way to
Page 152 and 153: LITERATURE CITED APPENDIX In Bailli
Page 154 and 155: APPENDIX IV SPECTACLED EIDER RECOVE
Page 156 and 157: APPENDIX V COMMENTS RECEIVED ON DRA
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