Special Scientific Report--Wildlife 160
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Smith (1971; 39) and Stoudt (1971: 47) have shown that blue- winged teal broods are consistently larger than mallard broods, which probably accounts for the differences in average brood sizes between the two locations. There is an indica- tion that the average brood size in both Montana and the Dakotas improved in 1969 and 1970 when the density of water areas per square mile increased.
LATE NESTING INDEX (ALL SPECIES) Only limited information is available re- garding this parameter in Montana a...nd the Dakotas. The late nesting effort in Montana appears to be much lower than the effort re- ported from the Dakotas.
15 SUMMARY Basic information obtained from the July Waterfowl Production Survey is presented in 32 Appendix tables for the period 1955-71.
The discussion of the data is minimized be- cause the report is designed primarily to make the data available to waterfowl biologists and other interested individuals. Data pre- sented include: (1) the number of July ponds, (2) the brood index, (3) the average size for Class II and Class III broods, and (4) the late nesting index.
What to read after Special Scientific Report--Wildlife 160?
You can find similar books in the "Read Also" column, or choose other free books by U.S. Fish And Wildlife Service to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Smith (1971; 39) and Stoudt (1971: 47) have shown that blue- winged teal broods are consistently larger than mallard broods, which probably accounts for the differences in average brood sizes between the two locations. There is an indica- tion that the average brood size in both Montana and the Dakotas improved in 1969 and 1970 when the density of water areas per square mile increased.
LATE NESTING INDEX (ALL SPECIES) Only limited information is available re- garding this parameter in Montana a...nd the Dakotas. The late nesting effort in Montana appears to be much lower than the effort re- ported from the Dakotas.
15 SUMMARY Basic information obtained from the July Waterfowl Production Survey is presented in 32 Appendix tables for the period 1955-71.
The discussion of the data is minimized be- cause the report is designed primarily to make the data available to waterfowl biologists and other interested individuals. Data pre- sented include: (1) the number of July ponds, (2) the brood index, (3) the average size for Class II and Class III broods, and (4) the late nesting index.
What to read after Special Scientific Report--Wildlife 160?
You can find similar books in the "Read Also" column, or choose other free books by U.S. Fish And Wildlife Service to read onlineMoreLess
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