| Abstract: | This paper presents a method of utilizing data relating to the production and survival of a bird population to estimate a basic fall adult sex ratio. This basic adult sex ratio is an average value derived from average production and survival rates. It is an estimate of the average sex ratio about which the fall adult ratios will fluctuate according to annual variations in production and survival. The basic fall adult sex ratio has been calculated as an asymptotic value which is the limit of an infinite series wherein average population characteristics are used as constants. Graphs are provided that allow the determination of basic sex ratios from production and survival data of a population. Where the respective asymptote has been determined, it may be possible to estimate various production and survival rates by use of variations of the formula for estimating the asymptote. |
| Genre: | Article |
| ProdID: | 5220020 |
| Citation Author: | Wight, H.M.; Heath, R.G.; Geis, A.D. |
| Citation Contributing Office: | Patuxent Wildlife Research Center |
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| Citation End Page: | 192 |
| Citation Issue: | 1 |
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| Citation Language: | English |
| Citation Larger Work Title: | Journal of Wildlife Management |
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| Citation Number Of Pages: | 8 |
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| Citation Phsyical Description: | 185-192 |
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| Citation Search Results Text: | A method for estimating fall adult sex ratios from production and survival data; 1965; Article; Journal; Journal of Wildlife Management; Wight, H.M.; Heath, R.G.; Geis, A.D. |
| Citation Start Page: | 185 |
| Citation Volume: | 29 |
| Citation Year: | 1965 |
| Type: | citation/reference |
| Text: | A method for estimating fall adult sex ratios from production and survival data; 1965; Article; Journal; Journal of Wildlife Management; Wight, H.M.; Heath, R.G.; Geis, A.D. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| URL (DOCUMENT): | http://www.jstor.org/stable/3798647 |
| Date Other: | Wed, 16 Jun 2010 12:17 -0500 |
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