التفاصيل البيبلوغرافية
| العنوان: |
Extraordinary Size and Survival of American Black Duck, Anas rubripes, Broods. |
| المؤلفون: |
Longcore, Jerry R., McAuley, Daniel G. |
| المصدر: |
Canadian Field-Naturalist; Jan-Mar2004, Vol. 118 Issue 1, p129-131, 3p, 1 Chart |
| مستخلص: |
Two female American Black Ducks (Arias rubripes) were initially observed during June 1982 with 20 Class Ib or 18-22 Class Ia-b ducklings in two wetlands in Hancock County, Cherryfield, Maine. Fifteen of 20 ducklings (75%) in one brood and 16 of 18-22 ducklings (72-89%) in the other brood survived to fledge. These large broods probably resulted from post-hatch brood amalgamation. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
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