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Ecological and biological strategies taken by the Argentine ant, Linepithema humile (Mayr, 1868), in cold seasons. Effects of winter nests management in natural invaded areas

The winter nesting behaviour of the Argentine ant seems to be intrinsic, and its success as an invasive species does not rely on a shift in social organization, nor on a shift in its mode of nesting associated with the introduction to new habitats. Differences in energy investment in queens seem to respond to the different ecological contexts between studied zones. Therefore, L. humile could be experiencing a change in their biological strategies to become an invasive species. Regarding the management of the invasion by means of manual removal of nests, we suggest to do it in winter, at the front, and yearly. Finally, P. pygmaea seems to be affected by L. humile in the front, and to be benefitting in the centre, because L. humile reduces the competitive pressure on it by retracting other native species in the centre, and also because the existence of a certain degree of habituation between these two species

El comportament de L. humile per niar a l鈥檋ivern sembla ser intr铆nsec, i el seu 猫xit com a esp猫cie invasora no basar-se ni en un canvi en l鈥檕rganitzaci贸 social, ni en la seva manera de niar associada a la introducci贸 en nous h脿bitats. Les difer猫ncies en la inversi贸 energ猫tica en reines semblen respondre als diferents contextos ecol貌gics de les zones estudiades. Per tant, L. humile podria patir un canvi en les seves estrat猫gies biol貌giques per tal de convertir-se en una esp猫cie invasora. Pel que fa a la gesti贸 de la invasi贸 mitjan莽ant l鈥檈xtirpaci贸 manual de nius, es suggereix fer-la a l鈥檋ivern, al front de la invasi贸 i anualment. Finalment, sembla que L. humile perjudica P. pygmaea al front, i la beneficia al centre, gr脿cies a que li disminueix la pressi贸 competitiva, al centre, retraient a les altres formigues natives, i a l鈥檈xist猫ncia d鈥檜n cert grau d鈥檋abituaci贸 entre ambdues esp猫cies

Universitat de Girona

Manager: G贸mez L贸pez, Crisanto
Abril, S铆lvia
Other contributions: Universitat de Girona. Departament de Ci猫ncies Ambientals
Author: Diaz Buitrago, Mireia
Date: 2013 February 21
Abstract: The winter nesting behaviour of the Argentine ant seems to be intrinsic, and its success as an invasive species does not rely on a shift in social organization, nor on a shift in its mode of nesting associated with the introduction to new habitats. Differences in energy investment in queens seem to respond to the different ecological contexts between studied zones. Therefore, L. humile could be experiencing a change in their biological strategies to become an invasive species. Regarding the management of the invasion by means of manual removal of nests, we suggest to do it in winter, at the front, and yearly. Finally, P. pygmaea seems to be affected by L. humile in the front, and to be benefitting in the centre, because L. humile reduces the competitive pressure on it by retracting other native species in the centre, and also because the existence of a certain degree of habituation between these two species
El comportament de L. humile per niar a l鈥檋ivern sembla ser intr铆nsec, i el seu 猫xit com a esp猫cie invasora no basar-se ni en un canvi en l鈥檕rganitzaci贸 social, ni en la seva manera de niar associada a la introducci贸 en nous h脿bitats. Les difer猫ncies en la inversi贸 energ猫tica en reines semblen respondre als diferents contextos ecol貌gics de les zones estudiades. Per tant, L. humile podria patir un canvi en les seves estrat猫gies biol貌giques per tal de convertir-se en una esp猫cie invasora. Pel que fa a la gesti贸 de la invasi贸 mitjan莽ant l鈥檈xtirpaci贸 manual de nius, es suggereix fer-la a l鈥檋ivern, al front de la invasi贸 i anualment. Finalment, sembla que L. humile perjudica P. pygmaea al front, i la beneficia al centre, gr脿cies a que li disminueix la pressi贸 competitiva, al centre, retraient a les altres formigues natives, i a l鈥檈xist猫ncia d鈥檜n cert grau d鈥檋abituaci贸 entre ambdues esp猫cies
Format: application/pdf
Document access: http://hdl.handle.net/10803/123669
Language: eng
Publisher: Universitat de Girona
Subject: Zoologia
Title: Ecological and biological strategies taken by the Argentine ant, Linepithema humile (Mayr, 1868), in cold seasons. Effects of winter nests management in natural invaded areas
Type: doctoralThesis
Repository: TDX

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