Table 1
Number of Ictalurus punctatus records per time period in the River Guadiana drainage between the 1980s and 2016, collected from various information sources: literature (papers and books); angling forums; youtube.com; blogs and other web sources (e.g. tourist promoter's sites, environmental groups, popular science sites, instagram.com, flickr.com, facebook.com).
| Year | Angler forums | Youtube | Literature | Blogs and others web sources | Total | Number of new locations |
|---|---|---|---|---|---|---|
| 80s | 0 | 1 | 0 | 0 | 1 | 1 |
| 90s | 0 | 0 | 2 | 0 | 2 | 2 |
| 2006 | 1 | 0 | 1 | 0 | 2 | 1 |
| 2007 | 2 | 0 | 0 | 0 | 2 | 0 |
| 2008 | 3 | 0 | 0 | 0 | 3 | 1 |
| 2009 | 1 | 0 | 0 | 0 | 1 | 0 |
| 2010 | 6 | 0 | 0 | 0 | 6 | 1 |
| 2011 | 0 | 1 | 0 | 1 | 2 | 1 |
| 2012 | 5 | 2 | 0 | 2 | 9 | 1 |
| 2013 | 2 | 0 | 0 | 1 | 3 | 0 |
| 2014 | 2 | 1 | 0 | 0 | 3 | 1 |
| 2015 | 2 | 0 | 0 | 1 | 3 | 1 |
| 2016 | 1 | 2 | 1 | 1 | 5 | 2 |
| Total | 25 | 7 | 4 | 6 | 42 | 12 |
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