38 

TABLE B-20. California--estimated total nesting pairs and fall population indices 
for North San Joaquin Valley (Grassland), 1974-19774/. 
Estimated Total Nesting Pairs Fall Population Indices 
Species 1974 1975 1976 1977 197 1975 1976 1977 
Ducks: 
Dabblers: 
Mallard 1,090 1,010 830 800 3,090 2,800 2,290 2,200 
Gadwal] 150 170 60 130 430 460 150 360 
Cinnamon Teal 480 470 180 170 1,380 1,290 470 470 
Shoveler 60 90 20 0 150 250 40 0 
Pintail 140 130 90 150 420 340 250 410 
Subtotal 1,920 1,870 1,180 1,250 5,470 5,140 3,200 3,440 
Divers: 
Redhead 50 0 0 20 140 0 0 40 
Ruddy Duck 40 40 0 40 110 110 0 110 
Subtotal 90 40 0 60 250 110 0 150 
Miscellaneous 10 50 0 0 20 120 0 0 
TOTAL DUCKS 2,020 1,960 1,180 1,310 5,740 5,370 3,200 3,590 
Coot 820 1,210 1,620 1,490 4,410 6,590 8,760 8,100 
Ss 
3/ area, 59,570 hectares; Type, rice land, pasture and managed refuges; Coverage, 10% 
aerial variable; and Remarks, duck 
were down 8% from last year. 
pairs and the fall population were up 11%. 
Coots 

39 
TABLE B-21. California--estimated total nesting ,pairs and fall population indices 
for Northern California, 1974-19772/ . 
S nIRIRInneneaipeinimemnennemamnenenec sme eC eee 
Estimated Total Nesting Pairs Fall Population Indices 
Species 1974 1975 1976 1977 1974 1975 1976 1977 
Ducks: 
Dabblers: 
Mallard 4,250 4,350 4,710 4,360 27,620 28,280 30,610 28,340 
Gadwal1 1,290 850 ~=1,020 1,140 10,140 6,640 8,030 8,960 
Cinnamon Teal 1,070 1,190 970 1,140 6,900 7,720 6,280 7,090 
Shoveler 210 190 140 220 1,290 1,160 870 1,350 
Pintail 1,400 1,430 900 730 8,030 8,180 5,160 4,220 
Subtotal 8,220 8,010 7,740 7,590 53,980 51,980 50,950 49,960 
Divers: 
Canvasback 20 10 70 30 80 60 320 130 
Redhead 490 650 340 930 3,340 4,470 2,310 5,360 
Scaup 50 90 70 250 310 540 410 1,550 
Ruddy Duck 110 130 110 200 610 720 620 1,150 
Subtotal 670 880 590 1,410 4,340 5,790 3,660 8,190 
Miscellaneous 210 200 110 140 1,020 970 550 690 
TOTAL DUCKS 9,100 9,090 8,440 9,140 59,340 58,740 55,160 58,840 
Canada Goose 650 680 510 425 21,5502/ 19,660°/ 15,3309/ 17,880e/ 
Coot 990 1,120 1,160 2,030 5,910 6,710 6,950 12,170 
eel eesti peeing pean epeitepslpespeenepentlsacemnp cin pep sinus eneesensecnnese 
2 aves, not determined; Type, natural marshes, lakes and artificial impoundments; Coverage, 
aerial, complete, and Remarks, Canada geese showed 17% decreases in breeding pairs and 
an increase of 17% in the overall fall population index. Duck pairs were up 8% and the 
fall population was up 7% over last year, while coots showed an increase of 75%. 
>/ includes 17,500 non-breeder. 
£/tncludes 16,090 non-breeder. 
4/Theludes 12,130 non-breeder. 
£/tncludes 14,780 non-breeder. 
