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Article
Lorinda A Hart, Auteur ; Linda van den Heever, Auteur ; Jan-Dieter Ludwigs, AuteurAvian species serve as a barometer of ecosystem health and have been used to determine the presence of chemicals in the South African environment. We conducted a literature review to determine which sublethal agrochemical active ingredient resid[...]
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Article
Christian Dietzen, Auteur ; Peter J. Edwards, Auteur ; Christian Wolf, Auteur ; Jan-Dieter Ludwigs, Auteur ; Robert Luttik, AuteurFocal species have been defined by the European Food Safety Authority (EFSA) as real species that represent others in a crop resulting from their potential higher level of exposure to pesticides. As such they are the most appropriate species for[...]
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Jan-Dieter Ludwigs, AuteurIn the breeding season of 1996 intra-specific kleptoparasitism of Common Terns was studied at a colony on Minsener Oldeoog. The marked kleptoparasitism in 1996 was caused by very poor food supply. 15% of the observed feedings of the common Tern [...]
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Jan-Dieter Ludwigs, AuteurOn 22nd of May 1999 a melanistic Blackcap was observed near San Pedro de Brena Alta (La Palma/Canary Islands). This is the first record of a "Schleiergrasmuecke" ("Veiled Blackcap" in BERTHOLD ET AL. 1997) since 1993 and the second in this centu[...]
