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<title lang=en>Thermal tolerance of sympatric hymenopteran parasitoid species: Does it match seasonal activity?</title>
<creator>Le Lann, Cécile</creator>
<creator>Roux, Olivier</creator>
<creator>Serain, Nelly</creator>
<creator>Van Alphen, Jacques, </creator>
<creator>Vernon, Philippe</creator>
<creator>Van Baaren, Joan</creator>
<contributor>Ecosystèmes, biodiversité, évolution [Rennes] (ECOBIO) ; Université de Rennes 1 (UR1) - INEE - Observatoire des Sciences de l'Univers de Rennes (OSUR) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>Laboratoire Ecologie Fonctionnelle et Environnement - ECOLAB (ECOLAB) ; Institut National Polytechnique [Toulouse] (INP) - Université Paul Sabatier - Toulouse 3 (UPS) - Observatoire Midi-Pyrénées (OMP) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>Ecologie des forêts de Guyane (ECOFOG) ; Centre de Coopération Internationale en Recherche Agronomique pour le Développement (CIRAD) - Institut National de la Recherche Agronomique (INRA) - Université des Antilles et de la Guyane (UAG) - AgroParisTech - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>Paysages, Changements Climatique, Biodiversité ; Ecosystèmes, biodiversité, évolution [Rennes] (ECOBIO) ; Université de Rennes 1 (UR1) - INEE - Observatoire des Sciences de l'Univers de Rennes (OSUR) - Centre National de la Recherche Scientifique (CNRS) - Université de Rennes 1 (UR1) - INEE - Observatoire des Sciences de l'Univers de Rennes (OSUR) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>programme ECOCLIM (région Bretagne)</contributor>
<description>International audience</description>
<source>ISSN: 0307-6962</source>
<source>EISSN: 1365-3032</source>
<source>Physiological Entomology</source>
<publisher>Wiley</publisher>
<identifier>hal-00589094</identifier>
<identifier>https://hal.archives-ouvertes.fr/hal-00589094</identifier>
<source>https://hal.archives-ouvertes.fr/hal-00589094</source>
<source>Physiological Entomology, Wiley, 2011, 36 (1), pp.21-28. 〈10.1111/j.1365-3032.2010.00758.x〉</source>
<identifier>DOI : 10.1111/j.1365-3032.2010.00758.x</identifier>
<relation>info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1365-3032.2010.00758.x</relation>
<language>en</language>
<subject lang=en>Climate change</subject>
<subject lang=en>critical thermal limits</subject>
<subject lang=en>CTMax</subject>
<subject lang=en>CTMin</subject>
<subject lang=en>dry mass</subject>
<subject lang=en>guild</subject>
<subject lang=en>hind tibia length</subject>
<subject lang=en>seasonal activities</subject>
<subject lang=en>surface to volume ratio</subject>
<subject>[SDE.BE] Environmental Sciences/Biodiversity and Ecology</subject>
<type>info:eu-repo/semantics/article</type>
<type>Journal articles</type>
<description lang=en>Climatic changes result in an increased in mean temperature and in a higher incidence of extreme weather events such as heat and cold waves. For ectotherms, such as insect parasitoids, the ability to remain active under extreme climatic conditions is a significant key to fitness. The body size of individuals, and in particular their surface to volume ratio, may play a role in their resistance to thermal conditions. The thermal tolerances are investigated of two closely-related sympatric parasitoid species [Aphidius avenae Haliday and Aphidius rhopalosiphi De Stefani-Perez (Hymenoptera: Aphidiinae)] that have a similar ecology but differ in body size and phenologies. The critical thermal limits of individuals are assessed in both sexes of each parasitoid species and the influence of surface-volume ratios on their thermal tolerances. Aphidius avenae is less resistant to low temperatures and more resistant to high temperatures than A. rhopalosiphi. The lower surface to volume ratio of A. avenae individuals may help them to remain active in summer when experiencing heat waves. However, body size is not the sole factor that plays a role in differences of thermal tolerance between species and body size may not be an adaptation to extreme temperatures but rather a by-product of developmental regulation. Closely related sympatric species from the same ecological guild can have different thermal tolerances that may allow them to occur within the same habitat. The present study also highlights the importance of clearly defining how to measure critical thermal limits to determine the thermal tolerance of a species.</description>
<date>2011</date>
<contributor>European Project : </contributor>
</dc>
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