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| dct:abstract
| - Ectoedemia argyropeza on Aspen leaves: deciphering retrospectively some behavioural traits from the distribution of traces of the insect activities subsisting on host-leaves (Lepidoptera, Nepticulidae). Despite their usually small size, endotrophic insects —especially those whose larvae are mining into their host-leaves— exhibit patterns of behaviour that are often more elaborate than what is usually seen in many ectotrophic herbivorous insects. However, since it is generally difficult to capture properly these behaviours in the field, precisely due to the small size of these insects, it turns out to be more convenient attempting to uncover retrospectively some of these behaviours on the basis of their resulting traces which subsist on the host-leaves. In order to be able to infer reliable information from this retrospective approach, the examination of a substantial number of host leaves and the support of appropriate statistical tests are required. The present study concerns a species of microlepidoptera, Ectoedemia argyropeza, whose caterpillars are exclusively mining the leaves of Aspen (Populus tremula) and which is still further distinguished, in a remarkable manner, by the induction of a preliminary galling (“cecidian”) development stage. This unusual combination of life traits contributes to enrich the insect’s behavioural repertoire and therefore offers a more promising field of investigation. For this species, I more particularly focus on the way the artefacts resulting from the insect activities are distributed spatially, on (or in) the host leaf, namely: (i) the spatial distribution of eggs deposited on the host-leaf petiole, (ii) the hierarchy of preferential positioning of the caterpillar corridor in the section of the petiole, hypertrophied by the cecidogenic reaction, (iii) the hierarchy of preferential locations of mines in the host-leaf blade. Were also tested, on the one hand, the existence (or not) of paired relationships between each of the three categories of distributions mentioned above and, on the other hand, the degree of conformation of each of these different distributions to the bilateral symmetry of the leaf support. The behavioural aspects that can be tentatively inferred from the above information are subsequently discussed.
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| bibo:abstract
| - Ectoedemia argyropeza on Aspen leaves: deciphering retrospectively some behavioural traits from the distribution of traces of the insect activities subsisting on host-leaves (Lepidoptera, Nepticulidae). Despite their usually small size, endotrophic insects —especially those whose larvae are mining into their host-leaves— exhibit patterns of behaviour that are often more elaborate than what is usually seen in many ectotrophic herbivorous insects. However, since it is generally difficult to capture properly these behaviours in the field, precisely due to the small size of these insects, it turns out to be more convenient attempting to uncover retrospectively some of these behaviours on the basis of their resulting traces which subsist on the host-leaves. In order to be able to infer reliable information from this retrospective approach, the examination of a substantial number of host leaves and the support of appropriate statistical tests are required. The present study concerns a species of microlepidoptera, Ectoedemia argyropeza, whose caterpillars are exclusively mining the leaves of Aspen (Populus tremula) and which is still further distinguished, in a remarkable manner, by the induction of a preliminary galling (“cecidian”) development stage. This unusual combination of life traits contributes to enrich the insect’s behavioural repertoire and therefore offers a more promising field of investigation. For this species, I more particularly focus on the way the artefacts resulting from the insect activities are distributed spatially, on (or in) the host leaf, namely: (i) the spatial distribution of eggs deposited on the host-leaf petiole, (ii) the hierarchy of preferential positioning of the caterpillar corridor in the section of the petiole, hypertrophied by the cecidogenic reaction, (iii) the hierarchy of preferential locations of mines in the host-leaf blade. Were also tested, on the one hand, the existence (or not) of paired relationships between each of the three categories of distributions mentioned above and, on the other hand, the degree of conformation of each of these different distributions to the bilateral symmetry of the leaf support. The behavioural aspects that can be tentatively inferred from the above information are subsequently discussed.
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| dct:bibliographicCitation
| - Béguinot, J. 2021. <em>Ectoedemia argyropeza</em> (Zeller, 1839) sur Peuplier Tremble : traits de comportement inférés à partir de la distribution des traces d’activités subsistant sur les feuilles-hôtes (Lepidoptera, Nepticulidae). <em>Bulletin de la Société entomologique de France</em>, 126(3): 351-363.
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