| Abstract: | During 1977-79, information useful for making breeding pair and brood surveys was obtained while studying black duck (Anas rubripes) habitat selection and productivity in south-central Maine. Surveys should be initiated in relation to sunrise and sunset time. Morning versus evening counts, familiarity with the survey area, wetland dynamics of the study area, wetland surface water area, and allotment of relative survey effort are discussed as they affect the conduct and results of brood surveys. |
| Genre: | Article |
| ProdID: | 5221583 |
| Citation Author: | Longcore, J.R.; Ringelman, J.K. |
| Citation Contributing Office: | Patuxent Wildlife Research Center |
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| Citation End Page: | 181 |
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| Citation Language: | English |
| Citation Larger Work Title: | Transactions of the Northeast Section of the Wildlife Society, Annual Fish and Wildlife Conference |
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| Citation Number Of Pages: | 13 |
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| Citation Phsyical Description: | 169-181 |
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| Citation Search Results Text: | Factors affecting waterfowl breeding density and productivity estimates in the Northeast; 1980; Article; Journal; Transactions of the Northeast Section of the Wildlife Society, Annual Fish and Wildlife Conference; Longcore, J.R.; Ringelman, J.K. |
| Citation Start Page: | 169 |
| Citation Volume: | 37 |
| Citation Year: | 1980 |
| Type: | citation/reference |
| Text: | Factors affecting waterfowl breeding density and productivity estimates in the Northeast; 1980; Article; Journal; Transactions of the Northeast Section of the Wildlife Society, Annual Fish and Wildlife Conference; Longcore, J.R.; Ringelman, J.K. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Wed, 16 Jun 2010 12:19 -0500 |
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