| Abstract: | Common Loon (Gavia immer) carcasses recovered in New England had more stones of greater combined mass in their stomachs than loons from the southeastern United States. Stones retained in sieves with mesh sizes between 4.75 and 8.00 mm accounted for the greatest percentage (by mass) of grit in loon stomachs. The median longest dimension of the largest single stone in each stomach was 12.5 mm in loons from New England and 10.7 mm in loons from the southeast (maximum = 23.1 mm and 16.8 mm, respectively). A recent national proposal to restrict the use of certain fishing weights in the United States called for a ban on lead fishing sinkers of 25.4 mm or less in any dimension. Our findings suggest it is unlikely that Common Loons would ingest lead fishing weights greater than 25.4 mm in any dimension, if such ingestion was solely the result of their search for replacement stones for their stomachs. However, this does not preclude the possibility that loons may ingest larger fishing weights under other circumstances, such as the consumption of fish with attached sinkers. |
| Genre: | Article |
| ProdID: | 70023873 |
| Citation Author: | Franson, J. C.; Hansen, S. P.; Pokras, M. A.; Miconi, R. |
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| Citation End Page: | 191 |
| Citation Issue: | 1 |
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| Citation Language: | English |
| Citation Larger Work Title: | Condor |
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| Citation Number Of Pages: | 3 |
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| Citation Search Results Text: | Size characteristics of stones ingested by Common Loons; 2001; Article; Journal; Condor; Franson, J. C.; Hansen, S. P.; Pokras, M. A.; Miconi, R. |
| Citation Start Page: | 189 |
| Citation Volume: | 103 |
| Citation Year: | 2001 |
| Type: | citation/reference |
| Text: | Size characteristics of stones ingested by Common Loons; 2001; Article; Journal; Condor; Franson, J. C.; Hansen, S. P.; Pokras, M. A.; Miconi, R. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Mon, 1 Jan 2001 00:00 -0600 |
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