What is a spider’s web? Webs provide spiders with a means to trap their food and, in some cases, a place to shelter. Webs consist of blends of different silks, cleverly combined for functionality. Take the ‘typical’ orb web of the common garden spider (compare the photo on this page), which has evolved to take out-ofplane loads at optimized deflections. To be able to do so, this web needs to in...

DNA metabarcoding is increasingly used to analyze the diet of arthropods, including spiders. However, high sensitivity contamination makes it difficult apply organisms obtained from mass-sampling methods such as pitfall traps. An alternative hand-sample spiders, but unclear how effectively this prevents external contamination, especially with new knowledge showing wide spread eDNA in environmen...

Spiders are part of the soil biodiversity, considered fundamental to food chain hierarchy, directly and indirectly influencing several services in agricultural forest ecosystems. The present study aimed evaluate biodiversity spider families identify which properties influence their presence, as well proposing potential bioindicators. Native (NF) reforested sites (RF) with Araucaria angustifolia...

This study presents the inventory of sea spiders (Pycnogonida) sampled during Madibenthos Expedition in Martinique (West Indies). Species were discriminated leaning on morphological and molecular data. A total 761 specimens are classified 72 species, 16 genera nine families. Thirteen new species described: Ammothella dirbergi sp. nov., A. krappi Tanystylum boucheti T. ingrallis Ascorhynchus igu...

An unattended trap was designed to iample andretainspiders dispersing from agriculturalgrassland and crops. Traps comprised a removable bottle-trap fixed to the top of a vertical metal rod or"climbing-stick" that spiders climbed during normal pns-ballooning behavior. Bottle-traps caught overeight times more spiders than sticks treated with insect trapping adheslvie. Draping ...

Local generalist predators can be exploited in conservation biological control of agricultural pests. To conserve and promote the most important predators, it is critical to have detailed knowledge about their prey range under natural conditions. I have studied predator-prey interactions between lycosid spiders from the genus Pardosa and a major aphid pest in spring-sown cereals; Rhopalosiphum ...

Using a virtual spider robot, we studied hypotheses about the weaving behaviour of orb spiders. Our model spiders built virtual webs that mimicked perfectly the visual architecture of real webs of the garden cross spider Araneus diadematus. The matching of capture spiral and auxiliary spiral pitch was an apparently emergent property in both types of web. This validated our interpretation of the...

more than 40,000 species of spiders have been identified in the world. spider bites is a common problem among people, however few of them are harmful but delay in treatment can cause death. since the spider bites are risk full to human, they should be taken seriously, especially in endemic areas. our objective in this review was to study about poisonous spiders and find out treatments of them. ...

The critical thermal maximum (CTMax) of Peucetia viridans Hentz 1832 adult spiders was determined in the laboratory. Mean temperature at death was higher for gravid spiders (49.4 C) than for postparturient females (47.2 C) and males (46.9 C). Painted copper spider models placed in the environment to examine available temperatures predicted that spider body temperatures would rarely exceed 40 C ...

In this paper the authors experiment and test a new biomimetic approach based on social spiders to solve a combinatorial problem ie the automatic classification of texts because a very large data stream flows and particularly on the web. Representation of textual data was performed by a method independent of the language ie n-gram characters and words because there is currently no method of lea...