| Abstract: | Numbered nasal discs were successfully used in studies requiring large numbers of individually marked waterfowl. The procedure for constructing these discs is outlined. Blue-winged teal (Anas discors) with 5/8-inch discs, and canvasback (Aythya valisineria) and redhead (A. americana) with 3/4-inch discs can be individually identified up to 50 and 80 yards, respectively, with a gunstock-mounted, 20-power spotting scope. The particular value of these markers is their durability, the number of combinations possible, and the apparent absence of behavioral or mortality influence among such species as the blue-winged teal. |
| Genre: | Article |
| ProdID: | 1001811 |
| Citation Author: | Bartonek, J. C.; Dane, C. W. |
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| Citation End Page: | 692 |
| Citation Issue: | 4 |
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| Citation Language: | English |
| Citation Larger Work Title: | Journal of Wildlife Management |
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| Citation Number Of Pages: | 4 |
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| Citation Phsyical Description: | p. 688-692 |
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| Citation Search Results Text: | Numbered nasal discs for waterfowl; 1964; Article; Journal; Journal of Wildlife Management; Bartonek, J. C.; Dane, C. W. |
| Citation Start Page: | 688 |
| Citation Volume: | 28 |
| Citation Year: | 1964 |
| Type: | citation/reference |
| Text: | Numbered nasal discs for waterfowl; 1964; Article; Journal; Journal of Wildlife Management; Bartonek, J. C.; Dane, C. W. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Wed, 1 Jan 1964 00:00 -0600 |
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