34 
TABLE B-16. Washington--comparison of 1976 and 1977 Canada goose productivity and 
roduction index. 
Amount surveyed/ Productivity unit Percent Pop. index 
Habitat type Total, River km. 1977 1976 Change _—smwi1‘97 1976 
Lower Columbia 
and Snake rivers 322/539 18.5 18.5 0% 6,181 6,209 
Yakima River 42/137 6.4 3.8 +68% 546 324 
Okanogan and 
Similkaneen rivers 23/72 37.6 38.2 -2% 1,690 1,719 
Upper Columbia River 177/547 12.2 hes +1% 4,140 4,099 
Columbia Basin lakes 52/56 teeol) «1,186 
Channeled scablands 288/1 ,618 Surv. 1976, assigned NC 633 633 
Total goose production 14,451 14,140 
Change in index +2% 
a ee 

TABLE B-17. California--estimated total nesting pairs and fall population indices in 
the Sacramento Valley, 1974-19772/. 
ns 
Estimated Total Nesting Pairs Fall Population Indices 
Species 1974 1975 1976 1977 1974 1975 1976 1977 
Ducks: a 73 olan od 
Dabblers: 
Mallard 25,270 39,320 26,520 38 ,000 105,510 164,220 110,760 158,700 
Gadwal] 490 800 440 840 2,410 4,000 2,200 4,200 
Cinnamon Teal 1,560 4,240 2,200 3,960 5,830 15,830 8,220 14,780 
Shoveler 0 120 0 80 0 540 0 360 
Pintail 800 720 480 1,080 3,080 2,780 1,850 4,160 
Subtotal 28,120 45,200 29,640 43,960 116,830 187,370 123,030 182,200 
Divers: 
Redhead 0 160 0 0 0 720 0 0 
Canvasback 600 600 160 40 2,680 2,680 720 180 
Scaup 8 40 0 0 0 180 0 0 
Ruddy Duck 80 1,000 240 0 360 4,470 1,150 0 
Subtotal 680 1,800 400 40 3,040 8,050 1,870 180 
Miscellaneous 40 40 40 280 180 180 180 1,250 
TOTAL DUCKS 28,840 47,040 30,080 44,280 120,050 195,600 125,080 183,630 
Coot 9,460 37,440 22,440 34,680 43,580 172,510 103,400 159,800 
eens 
a/Area, 621,600 hectares; Type, agricultural land including 111,291 hectares of rice 
plus managed refuges and gun clubs; Coverage, 2 1/2% aerial transect; and remarks, the 
number of breeding pairs of ducks and the fall population showed an increase of 47% 
while coots showed a 55% increase. 
