A jumping spider that lays eggs like an insect
| Autor: | Timothy C. Hawes |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
education.field_of_study Spider media_common.quotation_subject Population Asemonea tenuipes 010607 zoology Insect Biology biology.organism_classification 010603 evolutionary biology 01 natural sciences Asymmetry Jumping spider Horticulture Botany Animal Science and Zoology Symmetry (geometry) education Row Developmental Biology media_common |
| Zdroj: | Invertebrate Reproduction & Development. 61:265-273 |
| ISSN: | 2157-0272 0792-4259 |
| DOI: | 10.1080/07924259.2017.1347108 |
| Popis: | The South East Asian salticid, Asemonea tenuipes, lay its eggs like an insect: as individuated capsules in geometrically precise rows. The occurrence of this behaviour is described in a population from Thailand that lays eggs on the underside of mango tree (Mangifera indica) leaves. The rows were vertically arranged at a 90° angle that was parallel to, and varied in relation to the angle of the central leaf rib, indicating that the rib serves as the primary visual cue for orienting the row. Analysis of within-egg row symmetry found evidence that micro-topography – in particular, vertical ‘stepping’ produced by leaf sub-ribs – of the leaf surface plane was responsible for 97% of variability in the relative symmetry of egg placement. Three strategies were identified: (1) crossing the sub-rib and producing localized asymmetry in the egg row; (2) introducing a gap at the sub-rib to maintain symmetry; and (3) ‘compressing’ the egg row into the gap between sub-ribs. The incidence of asymmetry showed a h... |
| Databáze: | OpenAIRE |
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