| Abstract: | Various problems were identified with standardized hawk count data as annually collected at six sites. Some of the hawk lookouts increased their hours of observation from 1979-1985, thereby confounding the total counts. Data recording and missing data hamper coding of data and their use with modern analytical techniques. Coefficients of variation among years in counts averaged about 40%. The advantages and disadvantages of various analytical techniques are discussed including regression, non-parametric rank correlation trend analysis, and moving averages. |
| Genre: | Book chapter |
| ProdID: | 5210406 |
| Citation Author: | Titus, K.; Fuller, M.R.; Ruos, J.L. |
| Citation Contributing Office: | Patuxent Wildlife Research Center |
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| Citation Editor: | Meyburg, B-U.; Chancellor, R. D. (editors) |
| Citation End Page: | 32 |
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| Citation Language: | English |
| Citation Larger Work Title: | Raptors in the Modern World: Proceedings of the III World Conference on Birds of Prey and Owls |
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| Citation Number Of Pages: | 611 |
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| Citation Phsyical Description: | 611 |
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| Citation Public Comments: | PDF on file: 3834_Titus.pdf |
| Citation Publisher: | World Working Group on Birds of Prey and Owls |
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| Citation Search Results Text: | Considerations for monitoring raptor population trends based on counts of migrants; 1989; Book chapter; Raptors in the Modern World: Proceedings of the III World Conference on Birds of Prey and Owls; Titus, K.; Fuller, M.R.; Ruos, J.L. |
| Citation Start Page: | 19 |
| Citation Volume: | |
| Citation Year: | 1989 |
| Type: | citation/reference |
| Text: | Considerations for monitoring raptor population trends based on counts of migrants; 1989; Book chapter; Raptors in the Modern World: Proceedings of the III World Conference on Birds of Prey and Owls; Titus, K.; Fuller, M.R.; Ruos, J.L. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Tue, 9 Jun 2009 09:23 -0500 |
| Publisher: | World Working Group on Birds of Prey and Owls |
