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Aggressive behaviour of the two European Argentine ant supercolonies (Hymenoptera: Formicidae) towards displaced native ant species of the northeastern Iberian Peninsula

The present study attempts to analyse the aggressive behaviour of the two European supercolonies of the Argentine ant, Linepithema humile, in confrontations between them and with several native ant species, to assess if there are differences in their aggressiveness, and consequently, in their competitive ability. Workers from the Main supercolony were more aggressive than workers from the Catalan supercolony. They showed a higher significant aggressiveness index in confrontations with workers from the Catalan supercolony and with two of the three native ant species studied: in Tapinoma nigerrimum (NYLANDER, 1856) and Lash’s cinereus SEIFERT, 1992, but not in Pheidole pallidula (NYLANDER, 1849). They also mainly initiated the aggressive encounters and responded aggressively to attacks during confrontations both with the Catalan supercolony and with the native ant species. As compared to the Main supercolony, workers from the Catalan one showed a reduced aggressive behaviour in confrontations with the native ant species studied. Moreover, the native ant species attacked workers from the Catalan supercolony more frequently than workers from the Main one. These results may support the hypothesis of a weaker competitive ability of the Catalan supercolony, and therefore, a minor invasiveness power, and could also partially explain why that super-colony is clearly less widely distributed throughout Europe than the Main supercolony

This study was financed by the Spanish Ministry of Education and Science (MEC/FEDER2007-64080-C02-02/BOS and CGL2010-16451)

© Myrmecological News, 2011, vol. 14, p. 99-106

Austrian Society of Entomofaunistics (ÖGEF)

Autor: Abril, Sílvia
Gómez López, Crisanto
Data: 2011
Resum: The present study attempts to analyse the aggressive behaviour of the two European supercolonies of the Argentine ant, Linepithema humile, in confrontations between them and with several native ant species, to assess if there are differences in their aggressiveness, and consequently, in their competitive ability. Workers from the Main supercolony were more aggressive than workers from the Catalan supercolony. They showed a higher significant aggressiveness index in confrontations with workers from the Catalan supercolony and with two of the three native ant species studied: in Tapinoma nigerrimum (NYLANDER, 1856) and Lash’s cinereus SEIFERT, 1992, but not in Pheidole pallidula (NYLANDER, 1849). They also mainly initiated the aggressive encounters and responded aggressively to attacks during confrontations both with the Catalan supercolony and with the native ant species. As compared to the Main supercolony, workers from the Catalan one showed a reduced aggressive behaviour in confrontations with the native ant species studied. Moreover, the native ant species attacked workers from the Catalan supercolony more frequently than workers from the Main one. These results may support the hypothesis of a weaker competitive ability of the Catalan supercolony, and therefore, a minor invasiveness power, and could also partially explain why that super-colony is clearly less widely distributed throughout Europe than the Main supercolony
This study was financed by the Spanish Ministry of Education and Science (MEC/FEDER2007-64080-C02-02/BOS and CGL2010-16451)
Format: application/pdf
ISSN: 1994-4136 (versió paper)
1997-3500 (versió electrònica)
Accés al document: http://hdl.handle.net/10256/11943
Llenguatge: eng
Editor: Austrian Society of Entomofaunistics (ÖGEF)
Col·lecció: MEC/PN 2011-2013/CGL2010-16451
Reproducció digital del document publicat a: http://myrmecologicalnews.org/cms/index.php?option=com_content&view=category&id=455:myrmecol-news-14-99-106-online-earlier&Itemid=84&layout=default
Articles publicats (D-CCAA)
És part de: © Myrmecological News, 2011, vol. 14, p. 99-106
Drets: Tots els drets reservats
Matèria: Formiga argentina -- Hàbits i conducta
Argentine ant -- Behavior
Espècies introduïdes
Introduced organisms
Invasions biològiques
Biological invasions
Títol: Aggressive behaviour of the two European Argentine ant supercolonies (Hymenoptera: Formicidae) towards displaced native ant species of the northeastern Iberian Peninsula
Tipus: info:eu-repo/semantics/article
Repositori: DUGiDocs

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